-; CPSPK2.ASM
-; KERMIT - (Celtic for "FREE")
-;
-; This is the CP/M-80 implementation of the Columbia University
-; KERMIT file transfer protocol.
-;
-; Version 4.0
-;
-; Copyright June 1981,1982,1983,1984
-; Columbia University
-;
-; Originally written by Bill Catchings of the Columbia University Center for
-; Computing Activities, 612 W. 115th St., New York, NY 10025.
-;
-; Contributions by Frank da Cruz, Daphne Tzoar, Bernie Eiben,
-; Bruce Tanner, Nick Bush, Greg Small, Kimmo Laaksonen, Jeff Damens, and many
-; others.
-;
-; This file contains the (system-independent) routines that implement
-; the KERMIT protocol, and the commands that use them:
-; RECEIVE, SEND, FINISH, and LOGOUT.
-;
-; revision history:
-;
-;edit 11, 21-Mar-1991 by MF. After "inchr7", close TAKE-file (if any) so
-; ^C will halt all processing (including commands from TAKE-files)
-; and put the user back at Kermit command-level.
-;edit 10, 3-Jan-1991 by MF. Modify routine "inchr" after label "inchr5" to
-; not take retry (nonskip) return if ^X/^Z seen on the Console. This
-; will prevent multiple copies of packets being sent if user aborts
-; some files in a stream being sent via ^X and is a better fix to this
-; problem than flushing comm input before sending the "Z" packet
-; requesting the remote Kermit to discard the current file being
-; received (as implemented in CPSPK1.ASM edit of 2-jan-1991).
-;edit 9, 14-Dec-1990 by MF. Modified "gofil" routine to allow for
-; specification of a drive in the local filespec for GET and
-; RECEIVE commands. Thus commands such as
-; GET HELLO.TXT B:GOODBYE.TXT
-; and
-; RECEIVE B:GOODBYE.TXT
-; now work as expected.
-;edit 8, 22-Oct-1990 by MF. Fixed bug in completion-message routine
-; "finmes" wherein the completion message was not printed if the
-; terminal was set to QUIET because the message pointer was clobbered
-; by prcrlf.
-;edit 7, 14-Sep-1990 by MF. Add hooks for SET COLLISION command.
-; Eliminate commented-out old file warning rename routine.
-; Clear communication input buffers (call flsmdm) before
-; BYE, FINISH and LOGOUT commands.
-;edit 6, 9-Sep-1990 by MF. Implemented fixes in CPKERM.BWR for
-; garbage printout during quiet transfers and for file existence/
-; rename algorithm.
-; Also implemented hooks for Remote commands.
-; edit 5, 18 June 1990 by Russell Lang [rjl@monu1.cc.monash.edu.au]
-; When trying to generate a unique file name on receive, zero
-; the attribute bits between file opening attempts. This is
-; to fix a bug which caused the unique file name to have the
-; attributes of the already existing file. If the attribute
-; was R/O, a bdos error occured later when an attempt was made
-; to write to the file.
-;
-; edit 4, 27 October, 1987 By OBSchou. Changed the rename routine to
-; be more like the MSDOS issue.
-;
-; edit 3, 28 July, by OBSchou. Added traps to NOT print to screen during
-; file transfers if quietd is non zero (ie we SET TERMINAL QUIET)
-; This hopefully speeds up transfers in systems spending an age
-; updating the screen.
-;
-; edit 2, 8 April, 1987 by OBSchou. Minor edit to put drive and user number
-; in the "filename" field on the transfer screen. This means that the
-; offset on the line foe the file name proper has moved along 4 space.
-; Also, it writes 15 spaces AFER the xxd: string to clear the field
-; of any prevous file. Needed for thos terminals that cannot
-; clear to end of line...
-;
-; edit 1, 28 January, 1987 by OBSchou.
-; Hived off about 1/2 of CPSPKT.ASM to form two (smaller => easier
-; to handle) files.
-;
-;
-
-pk2ver: db 'CPSPK2.ASM (11) 21-Mar-1991$' ; name, edit number, date
-
-
-;
-; Get the file name (including host to micro translation)
-; called by: rfile
-
-gofil: xra a
- sta fcb ;Set the drive to default to current.
- lxi h,data ;Get the address of the file name.
-; allow use of local name if one was given [gnn]
- lda remlen ;[gnn]
- ora a ;[gnn] anything there?
- jz gofil0 ;[gnn] no, use the one in the data packet
- lxi h,remnam ;[gnn] yes, use this instead
- lda remnam+1 ;[MF]Get 2nd char of local filename
- cpi ':' ;[MF]Was a drive specified?
- jnz gofil0 ;[MF]No, proceed as of old
- mov a,m ;[MF]Yes, get drive
- ani 5fh ;[MF]Force uppercase
- sui 'A'-1 ;[MF]Make valid drive for fcb
- sta fcb ;[MF]and store in fcb
- inx h ;[MF]Skip drive and delimiter
- inx h ;[MF]...
-gofil0: ;[gnn] continue to set up the file [gnn]
-;
- shld datptr ;Store the address.
- lxi h,fcb+1 ;Address of the FCB.
- shld fcbptr ;Save it.
- xra a
- sta temp1 ;Initialize the char count.
- sta temp2
- mvi b,' '
-gofil1: mov m,b ;Blank the FCB.
- inx h
- inr a
-; cpi 0CH ;Twelve?[5a]
- cpi 0BH ; Eleven? [5a]
- jm gofil1
- mvi m,0 ; [5a] Specify extent 0
-gofil2: lhld datptr ;Get the NAME field.
- mov a,m
- cpi 'a' ;Force upper case
- jm gofl2a ;
- ani 5FH ;
-gofl2a: inx h
- cpi '.' ;Seperator?
- jnz gofil3
- shld datptr ;[jd] update ptr (moved from above)
- lxi h,fcb+9H
- shld fcbptr
- lda temp1
- sta temp2
- mvi a,9H
- sta temp1
- jmp gofil6
-
-gofil3: ora a ;Trailing null?
- jz gofil7 ;Then we're done.
- shld datptr ;[jd] no, can update ptr now.
- lhld fcbptr
- mov m,a
- inx h
- shld fcbptr
- lda temp1 ;Get the char count.
- inr a
- sta temp1
- cpi 8H ;Are we finished with this field?
- jm gofil2
-gofil4: sta temp2
- lhld datptr
- mov a,m
- inx h
- shld datptr
- ora a
- jz gofil7
- cpi '.' ;Is this the terminator?
- jnz gofil4 ;Go until we find it.
-gofil6: lhld datptr ;Get the TYPE field.
- mov a,m
- cpi 'a' ;Force upper case
- jm gofl6a ;
- ani 5FH ;
-gofl6a: ora a ;Trailing null?
- jz gofil7 ;Then we're done.
-;[jd] move above two lines so we don't increment pointer if char is null
- inx h
- shld datptr
- lhld fcbptr
- mov m,a
- inx h
- shld fcbptr
- lda temp1 ;Get the char count.
- inr a
- sta temp1
- cpi 0CH ;Are we finished with this field?
- jm gofil6
-gofil7: lhld datptr
- mvi m,'$' ;Put in a dollar sign for printing.
- lda quietd ; quiet display?
- ana a
- jnz gofi70 ; yes, so skip it.
- call scrfln ;Position cursor
-gofi70: lxi d,data ;Print the file name
- lda getrxflg ;[obs 8] are we doing a get or receive?
- ana a ;[obs 8]
- jz gofi7a ;[obs 8] if zero, receive
- lxi d,remnam ;[obs 8]
-gofi7a: ;[obs 8]
-
- call prtstr
-gofi7b: xra a ;[MF]Zero "discard" flag
- sta dscflg ;[MF]...
- lda flwflg ;Is file warning on?
- ora a
- jz gofil9 ;If not, just proceed.
- mvi c,openf ;See if the file exists.
- lxi d,fcb
- call bdos
- cpi 0FFH ;Does it exist?
- jz gofil9 ;If not create it.
-;
- lda flwflg ;[MF]Get flag again
- cpi 3 ;[MF]SET COLLISION DISCARD?
- jnz gofi7h ;[MF]No
- mvi a,0ffh ;[MF]Yes, order rejection of the file
- sta dscflg ;[MF]...
- jmp rskp ;[MF]and pretend successful open
-gofi7h: push psw ;[MF]Save Collision status
- lxi d,infms5
- call error3
- pop psw ;[MF]Restore Collision status
- cpi 1 ;[MF]SET COLLISION RENAME?
- jz gofi7i ;[MF]Yes, same as SET WARNING ON
- ;[MF]If we come here, SET COLLISION BACKUP
- lxi h,fcb ;[MF]Copy original fcb to a safe place
- lxi d,colfcb ;[MF]...
- lxi b,33 ;[MF]...
- call mover ;[MF]...
- ;[MF]and fall into rename code
-gofi7i: ;[MF]
-;
-; Replacement file name renamer routine. Incomming
-; files are renamed in this manner:
-; original file name: filex.ext
-; first rename: filex001.ext
-; ... ...
-; ninth rename filex009.ext
-; 10th rename fail - would we really want 10
-; files of the same name??
-;
-;
-; 1)
-; Assume that we need to "rename" the file, so lets make sure
-; that there is a full. 8 character filename. (We make it if
-; it does not already exist)
-; 1a) If full file name, last character is to be replaced
-; by a zero. This gives us up to no#ine renames.
-; 2)open file
-; 2a)If exists, increment last character by one
-; 2b)if = '9' then abort
-; 2c)If does not exist, got 2)
-; 3)we have a valid 'renamed' file
-;
-;Part 1) - fill out filename part
-
- mvi c,8 ; max 8 characters to test for
- mvi a,'0' ; spaces to be replaced by a zero.
- lxi h,fcb+8 ; start at the end
-gofi7c: mov m,a ; put a zero in here
- dcr c ; come to the end?
- jz gofi7d ; should not have, but just in case...
- dcx h ; previous chararcter
- mov a,m ; get it
- cpi ' ' ; if this character a space as well, zero it
- mvi a,'0' ; set it to ascii zero just in case...
- jz gofi7c ;
-;
-; Part 2) open the file (if success, then it exists)
-
-gofi7d:
-;zero the attribute bits. [rjl@monu1.cc.monash.edu.au]
- lxi h,fcb+1 ;[rjl]
- mvi c,11 ;[rjl]
-gofi7z: mov a,m ;[rjl]
- ani 07fh ;[rjl]
- mov m,a ;[rjl]
- inx h ;[rjl]
- dcr c ;[rjl]
- jnz gofi7z ;[rjl]
- lxi d,fcb
- mvi c,openf
- call BDOS
- inr a ; if 0ffh returned, error (ie does not exist)
- jz gofi7e
- lda fcb+8 ; get last character
- inr a
- sta fcb+8
- cpi '9'+1 ; more than '9' => too far, lets give up.
- jnz gofi7d ; else try again
-;Giving up, so lets exit
- lxi d,erms16 ;
- call prtstr
- ret ; return to error routine
-
-gofi7e: lxi d,fnbuf ; make the file name into a character string
- lxi h,fcb+1 ; point to source file name, less drive name
- mvi c,8 ; 11 characters (8+3) + dot to copy across
-;
-gofi7f: mov a,m ; get character
- stax d
- inx h
- inx d
- dcr c
- jnz gofi7f ; loop until all done
-
- mvi a,'.' ; then the dot
- stax d
- inx d
-
- mvi c,3 ; then the file extention
-
-gofi7g: mov a,m
- stax d
- inx h
- inx d
- dcr c
- jnz gofi7g ; loop until extention copied across
-
- mvi a,'$' ; dollar terminate string
- stax d
- lxi d,fnbuf ;[MF]Point to string
- call prtstr ; write string to console
-
- lda flwflg ;[MF]Get warning (SET COLLISION) flag
- cpi 2 ;[MF]SET COLLISION BACKUP?
- jnz gofil9 ;[MF]No
- lxi h,fcb ;[MF]Yes, get new filename fcb
- lxi d,colfcb+16 ;[MF]Where to copy to for rename
- lxi b,16 ;[MF]Copy 16 bytes
- call mover ;[MF]...
- lxi d,colfcb ;[MF]Point to rename fcb
- mvi c,renam ;[MF]Rename function
- call bdos ;[MF]Try to rename original file
- cpi 0ffh ;[MF]Did we win?
- jnz gofl82 ;[MF]Yes
- lxi d,erms16 ;[MF]No, complain and bomb
- jmp error3 ;[MF]...
-gofl82: lxi h,colfcb ;[MF]Now recopy original filename into fcb
- lxi d,fcb ;[MF]to create new file with original name
- lxi b,16 ;[MF]...
- call mover ;[MF]...
-;
-;
-;Now lets make the file (create it)
-
-gofil9: call makfil ; Create the file.
- jmp gofl91 ; Disk was full.
- jmp rskp ; Success.
-
-gofl91: lxi d,erms11
- call error3
- ret
-;\f
-; This is the FINISH command. It tells the remote KERSRV to exit.
-; here from kermit
-
-finish: call cfmcmd
- call selmdm ;[MF]Select modem
- call flsmdm ;[MF]Flush buffers
- call selcon ;[MF]Select keyboard again
- xra a
- sta numtry ;Inititialize count.
- mvi a,'1' ;Reset block check type to single character
- sta curchk ; . . .
-
-finsh1: lda numtry ;How many times have we tried?
- cpi maxtry ;Too many times?
- jm finsh3 ;No, try it.
-finsh2: lxi d,erms18 ;Say we couldn't do it.
- call prtstr
- jmp kermit ;Go home.
-
-finsh3: inr a ;Increment the number of tries.
- sta numtry
- xra a
- sta argblk ;Make it packet number zero.
- mvi a,1
- sta argblk+1 ;One piece of data.
- lxi h,data
- mvi m,'F' ;Finish running Kermit.
- mvi a,'G' ;Generic command packet.
- call spack
- jmp finsh2 ; Tell the user and die.
- call rpack ;Get an acknowledgement.
- jmp finsh1 ; Go try again.
- cpi 'Y' ;ACK?
- jz kermit ;Yes, we are done.
- cpi 'E' ;Is it an error packet?
- jnz finsh1 ;Try sending the packet again.
- call error1 ;Print the error message.
- jmp kermit
-;\f
-; This is the LOGOUT command. It tells the remote KERSRV to logout.
-; here from: kermit
-
-logout: call cfmcmd
- call logo ;Send the logout packet.
- jmp kermit ;Go get another command
- jmp kermit ; whether we succeed or not.
-
-; do logout processing.
-; called by: bye, logout
-
-logo: call selmdm ;[MF]Select modem
- call flsmdm ;[MF]Flush buffers
- call selcon ;[MF]Select keyboard again
- xra a
- sta numtry ;Inititialize count.
- mvi a,'1' ;Reset block check type to single character
- sta curchk ; . . .
-
-logo1: lda numtry ;How many times have we tried?
- cpi maxtry ;Too many times?
- jm logo3 ;No, try it.
-logo2: lxi d,erms19 ;Say we couldn't do it.
- call prtstr
- ret ;Finished.
-
-logo3: inr a ;Increment the number of tries.
- sta numtry
- xra a
- sta argblk ;Make it packet number zero.
- mvi a,1
- sta argblk+1 ;One piece of data.
- lxi h,data
- mvi m,'L' ;Logout the remote host.
- mvi a,'G' ;Generic command packet.
- call spack
- jmp logo2 ; Tell the user and die.
- call rpack ;Get an acknowledgement
- jmp logo1 ; Go try again.
- cpi 'Y' ;ACK?
- jz rskp ;Yes, we are done.
- cpi 'E' ;Is it an error packet?
- jnz logo1 ;Try sending the packet again.
- call error1 ;Print the error message.
- ret ;All done.
-;\f
-; Packet routines
-
-; Send_Packet
-; This routine assembles a packet from the arguments given and sends it
-; to the host.
-;
-; Expects the following:
-; A - Type of packet (D,Y,N,S,R,E,F,Z,T)
-; ARGBLK - Packet sequence number
-; ARGBLK+1 - Number of data characters
-; Returns: nonskip if failure
-; skip if success
-; called by: read, rinit, rfile, rdata, sinit, sfile, sdata, seof, seot,
-; finish, logout, nak, ackp
-
-spack: sta argblk+2
- lxi h,packet ;Get address of the send packet.
- lda sndsop ;[gnn] send start-of-pkt char.
- mov m,a ;Put in the packet.
- inx h ;Point to next char.
- lda curchk ;Get current checksum type
- sui '1' ;Determine extra length of checksum
- mov b,a ;Copy length
- lda argblk+1 ;Get the number of data chars.
- adi ' '+3 ;Real packet character count made printable.
- add b ;Determine overall length
- mov m,a ;Put in the packet.
- inx h ;Point to next char.
- lxi b,0 ;Zero the checksum AC.
- mov c,a ;Start the checksum.
- lda argblk ;Get the packet number.
- adi ' ' ;Add a space so the number is printable.
- mov m,a ;Put in the packet.
- inx h ;Point to next char.
- add c
- mov c,a ;Add the packet number to the checksum.
- mvi a,0 ;Clear A (Cannot be XRA A, since we can't
- ; touch carry flag)
- adc b ;Get high order portion of checksum
- mov b,a ;Copy back to B
- lda argblk+2 ;Get the packet type.
- mov m,a ;Put in the packet.
- inx h ;Point to next char.
- add c
- mov c,a ;Add the packet number to the checksum.
- mvi a,0 ;Clear A
- adc b ;Get high order portion of checksum
- mov b,a ;Copy back to B
-spack2: lda argblk+1 ;Get the packet size.
- ora a ;Are there any chars of data?
- jz spack3 ; No, finish up.
- dcr a ;Decrement the char count.
- sta argblk+1 ;Put it back.
- mov a,m ;Get the next char.
- inx h ;Point to next char.
- add c
- mov c,a ;Add the packet number to the checksum.
- mvi a,0 ;Clear A
- adc b ;Get high order portion of checksum
- mov b,a ;Copy back to B
- jmp spack2 ;Go try again.
-
-spack3: lda curchk ;Get the current checksum type
- cpi '2' ;Two character?
- jz spack4 ;Yes, go handle it
- jnc spack5 ;No, go handle CRC if '3'
- mov a,c ;Get the character total.
- ani 0C0H ;Turn off all but the two high order bits.
- ;Shift them into the low order position.
- rlc ;Two left rotates same as 6 rights
- rlc ; . . .
- add c ;Add it to the old bits.
- ani 3FH ;Turn off the two high order bits. (MOD 64)
- adi ' ' ;Add a space so the number is printable.
- mov m,a ;Put in the packet.
- inx h ;Point to next char.
- jmp spack7 ;Go store eol character
-
-;Here for 3 character CRC-CCITT
-
-spack5: mvi m,0 ;Store a null for current end
- push h ;Save H
- lxi h,packet+1 ;Point to first checksumed character
- call crcclc ;Calculate the CRC
- pop h ;Restore the pointer
- mov c,e ;Get low order half for later
- mov b,d ;Copy the high order
- mov a,d ;Get the high order portion
- rlc ;Shift off low 4 bits
- rlc ; . . .
- rlc ; . . .
- rlc ; . . .
- ani 0FH ;Keep only low 4 bits
- adi ' ' ;Put into printing range
- mov m,a ;Store the character
- inx h ;Point to next position
-
-;Here for two character checksum
-
-spack4: mov a,b ;Get high order portion
- ani 0FH ;Only keep last four bits
- rlc ;Shift up two bits
- rlc ; . . .
- mov b,a ;Copy back into safe place
- mov a,c ;Get low order half
- rlc ;Shift high two bits
- rlc ;to low two bits
- ani 03H ;Keep only two low bits
- ora b ;Get high order portion in
- adi ' ' ;Convert to printing character range
- mov m,a ;Store the character
- inx h ;Point to next character
- mov a,c ;get low order portion
- ani 3FH ;Keep only six bits
- adi ' ' ;Convert to printing range
- mov m,a ;Store it
- inx h ;Bump the pointer
-
-spack7: lda dbgflg
- ora a ; is debugging enabled?
- jz spack8
- push h ; yes. save address of end of packet
- mvi m,0 ; null-terminate the packet for display
- lda quietd ; a quiet display?
- ana a
- jnz spac7a ; so dont say a thing
- call sppos ; position cursor
- lxi h,packet+1 ; print the packet
- call dmptxt
- lda prnflg ; is the printer on too?
- ana a
- jz spac7a
- lxi h,sstatm ; print state
- call printm ; dumptext but to printer
- lda state
- mov e,a
- call outprn
- lxi h,princr ; cr lf to printer
- call printm
- lxi h,spackm
- call printm
- lxi h,packet+1
- call printm
- lxi h,princr
- call printm
- lxi h,princr
- call printm
-
-spac7a: pop h ; restore address of end of packet
-spack8: lda seol ;Get the EOL the other host wants.
- mov m,a ;Put in the packet.
- inx h ;Point to next char.
- xra a ;Get a null.
- mov m,a ;Put in the packet.
-; Write out the packet.
-outpkt: call selmdm ; Set up for output to comm port if iobyt
- lda spad ;Get the number of padding chars.
- sta temp1
-outpk2: lda temp1 ;Get the count.
- dcr a
- ora a
- jm outpk6 ;If none left proceed.
- sta temp1
- lda spadch ;Get the padding char.
- call setpar ;Set parity appropriately
- mov e,a ;Put the char in right AC.
- call outmdm ;Output it.
- jmp outpk2
-
-outpk6: lxi h,packet ; Point to the packet.
-outlup: mov a,m ; Get the next character.
- ora a ; Is it a null?
- jz outlud ; If so return success.
- call setpar ; Set parity for the character
- mov e,a ; Put it in right AC
- call outmdm ; and output it.
-; TAC trap: If this character is the TAC intercept character, and the TAC
-; trap is enabled, we have to output it twice. If the TAC trap is enabled,
-; tacflg contains the intercept character. (The current character cannot
-; be NUL, so we don't have to worry about doubling nulls in the message)
- lda tacflg ; get current intercept character, or zero.
- cmp m ; compare against current data character.
- jnz outpk8 ; if different, do nothing.
- call setpar ; match. set appropriate parity,
- mov e,a ; put it in the right register,
- call outmdm ; and output it a second time.
-outpk8:
- inx h ; Increment the char pointer.
- jmp outlup
-
-outlud: call selcon ; select console
- jmp rskp ; and return success
-;\f
-; Receive_Packet
-; This routine waits for a packet to arrive from the host. It reads
-; characters until it finds a SOH. It then reads the packet into packet.
-;
-; Returns: nonskip if failure (checksum wrong or packet trashed)
-; skip if success, with
-; A - message type
-; ARGBLK - message number
-; ARGBLK+1 - length of data
-; called by: rinit, rfile, rdata,
-; sinit, sfile, sdata, seof, seot, finish, logout
-
-rpack: call inpkt ;Read up to the end-of-line character
- jmp r ; Return bad.
-rpack0: call getchr ;Get a character.
- jmp rpack ; Hit eol;null line;just start over.
- lxi h,rcvsop ;[gnn] Is it receive start-of-pkt char.
- cmp m ;[gnn]
- jnz rpack0 ; No, go until it is.
-rpack1: call getchr ;Get a character.
- jmp r ; Hit end of line, return bad.
- lxi h,rcvsop ;[gnn] Is it receive start-of-pkt char.
- cmp m ;[gnn]
- jz rpack1 ; Yes, then go start over.
- sta packet+1 ;Store in packet also
- mov c,a ;Start the checksum.
- lda curchk ;Get block check type
- sui '1' ;Determine extra length of block check
- mov b,a ;Get a copy
- mov a,c ;Get back length character
- sui ' '+3 ;Get the real data count.
- sub b ;Get total length
- sta argblk+1
- mvi b,0 ;Clear high order half of checksum
- call getchr ;Get a character.
- jmp r ; Hit end of line, return bad.
- lxi h,rcvsop ;[gnn] Is it receive start-of-pkt char.
- cmp m ;[gnn]
- jz rpack1 ; Yes, then go start over.
- sta argblk
- sta packet+2 ;Save also in packet
- add c
- mov c,a ;Add the character to the checksum.
- mvi a,0 ;Clear A
- adc b ;Get high order portion of checksum
- mov b,a ;Copy back to B
- lda argblk
- sui ' ' ;Get the real packet number.
- sta argblk
- call getchr ;Get a character.
- jmp r ; Hit end of line, return bad.
- lxi h,rcvsop ;[gnn] Is it receive start-of-pkt char.
- cmp m ;[gnn]
- jz rpack1 ; Yes, then go start over.
- sta temp1 ;Save the message type.
- sta packet+3 ;Save in packet
- add c
- mov c,a ;Add the character to the checksum.
- mvi a,0 ;Clear A
- adc b ;Get high order portion of checksum
- mov b,a ;Copy back to B
- lda argblk+1 ;Get the number of data characters.
- sta temp2
- lxi h,data ;Point to the data buffer.
- shld datptr
-rpack2: lda temp2
- sui 1 ;Any data characters?
- jm rpack3 ; If not go get the checksum.
- sta temp2
- call getchr ;Get a character.
- jmp r ; Hit end of line, return bad.
- lxi h,rcvsop ;[gnn] Is it receive start-of-pkt char.
- cmp m ;[gnn]
- jz rpack1 ; Yes, then go start over.
- lhld datptr
- mov m,a ;Put the char into the packet.
- inx h ;Point to the next character.
- shld datptr
- add c
- mov c,a ;Add the character to the checksum.
- mvi a,0 ;Clear A
- adc b ;Get high order portion of checksum
- mov b,a ;Copy back to B
- jmp rpack2 ;Go get another.
-
-rpack3: call getchr ;Get a character.
- jmp r ; Hit end of line, return bad.
- lxi h,rcvsop ;[gnn] Is it receive start-of-pkt char.
- cmp m ;[gnn]
- jz rpack1 ; Yes, then go start over.
- sui ' ' ;Turn the char back into a number.
- sta temp3
-;Determine type of checksum
-
- lda curchk ;Get the current checksum type
- cpi '2' ;1, 2 or 3 character?
- jz rpack4 ;If zero, 2 character
- jnc rpack5 ;Go handle 3 character
- mov a,c ;Get the character total.
- ani 0C0H ;Turn off all but the two high order bits.
- ;Shift them into the low order position.
- rlc ;Two left rotates same as six rights
- rlc ; . . .
- add c ;Add it to the old bits.
- ani 3FH ;Turn off the two high order bits. (MOD 64)
- mov b,a
- lda temp3 ;Get the real received checksum.
- cmp b ;Are they equal?
- jz rpack7 ;If so, proceed.
-rpack9: call updrtr ;If not, update the number of retries.
- ret ;Return error.
-
-;Here for three character CRC-CCITT
-
-rpack5: lhld datptr ;Get the address of the data
- mvi m,0 ;Store a zero in the buffer to terminate packet
- lxi h,packet+1 ;Point at start of checksummed region
- call crcclc ;Calculate the CRC
- mov c,e ;Save low order half for later
- mov b,d ;Also copy high order
- mov a,d ;Get high byte
- rlc ;Want high four bits
- rlc ; . . .
- rlc ;And shift two more
- rlc ; . . .
- ani 0FH ;Keep only 4 bits
- mov d,a ;Back into D
- lda temp3 ;Get first value back
- cmp d ;Correct?
- jnz rpack9 ;No, punt
- call getchr ;Get a character.
- jmp r ; Hit end of line, return bad.
- lxi h,rcvsop ;[gnn] Is it receive start-of-pkt char.
- cmp m ;[gnn]
- jz rpack1 ; Yes, then go start over.
- sui ' ' ;Remove space offset
- sta temp3 ;Store for later check
- ;...
-
-;Here for a two character checksum and last two characters of CRC
-
-rpack4: mov a,b ;Get high order portion
- ani 0FH ;Only four bits
- rlc ;Shift up two bits
- rlc ; . . .
- mov b,a ;Save back in B
- mov a,c ;Get low order
- rlc ;move two high bits to low bits
- rlc ; . . .
- ani 03H ;Save only low two bits
- ora b ;Get other 4 bits
- mov b,a ;Save back in B
- lda temp3 ;Get this portion of checksum
- cmp b ;Check first half
- jnz rpack9 ;If bad, go give up
- call getchr ;Get a character.
- jmp r ; Hit end of line, return bad.
- lxi h,rcvsop ;[gnn] Is it receive start-of-pkt char.
- cmp m ;[gnn]
- jz rpack1 ; Yes, then go start over.
- sui ' ' ;Remove space offset
- mov b,a ;Save in safe place
- mov a,c ;Get low 8 bits of checksum
- ani 3FH ;Keep only 6 bits
- cmp b ;Correct value
- jnz rpack9 ;Bad, give up
-rpack7: lhld datptr
- mvi m,0 ;Put a null at the end of the data.
- lda temp1 ;Get the type.
- jmp rskp
-;\f
-; inpkt - receive and buffer packet
-; returns: nonskip if error (timeout)
-; skip if success; packet starts at recpkt (which holds the SOH)
-; and is terminated by a null.
-; console is selected in either case.
-; called by: rpack
-
-inpkt: lxi h,recpkt ;Point to the beginning of the packet.
- shld pktptr
-inpkt1: call inchr ;Get first character
- jmp r ;Return failure
- lxi h,rcvsop ;[gnn] Is it receive start-of-pkt char.
- cmp m ;[gnn]
- jnz inpkt1 ;if not, ignore leading junk
- jmp inpkt3 ;else go put it in packet
-
-inpkt2: call inchr ;Get a character.
- jmp r ; Return failure.
- lxi h,rcvsop ;[gnn] Is it receive start-of-pkt char.
- cmp m ;[gnn]
- jnz inpkt3 ;if not continue
- lxi h,recpkt ;else throw away what we've got so far
- shld pktptr ;
-inpkt3: lhld pktptr ;
- mov m,a ;Put the char in the packet.
- inx h
- shld pktptr
- mov b,a
- lxi d,-recpkx ;Start over if packet buffer overflow
- dad d ;
- jc inpkt ;buffer overflow
- lda reol ;Get the EOL char.
- cmp b
- jnz inpkt2 ;If not loop for another.
-;[gnn] *** added by Godfrey Nix Nottingham University ***
-;[gnn] to allow Kermit server to echo our packets back
- lxi h,recpkt+3 ;[gnn] point to packet type
- lda packet+3 ;[gnn] get the one we sent
- cmp m ;[gnn] are they the same?
- jz inpkt ;[gnn] yes, get another packet
-;[gnn] *** end of patch *****
- ;...
- ;...
-
-;Begin IBM change/fdc
-;This moved from OUTPK7 -- it appears that waiting until we're
-;ready to send a packet before looking for turnaround character
-;is long enough for it to get lost. Better to look now.
-
- lda ibmflg ;Is this the IBM?
- ora a
- jz inpkt6 ;If not then proceed.
- lda state ;Check if this is the Send-Init packet.
- cpi 'S'
- jz inpkt6 ;If so don't wait for the XON.
-inpkt5: call inchr ;Wait for the turn around char.
- jmp inpkt6
- cpi xon ;Is it the IBM turn around character?
- jnz inpkt5 ;If not, go until it is.
-inpkt6: lhld pktptr ;Reload packet pointer
-;End IBM change/fdc.
- dcx h ;Back up to end of line character
- mvi m,0 ;Replace it with a null to stop rpack:
- call selcon ;We've got the packet. Return to console.
-
- lda dbgflg ; Is debugging enabled?
- ora a
- jz inpkt7
- inx h ; Point to next char.
- lda quietd ; a quiet display?
- ana a
- jnz inpkt7 ; so dont say a thing
- call rppos ; position cursor
- lxi h,recpkt+1 ; print the packet
- call dmptxt
-
- lda prnflg ; is the printer on too?
- ana a
- jz inpkt7
- lxi h,rstatm ; print state
- call printm ; dumptext but to printer
- lda state
- mov e,a
- call outprn
- lxi h,princr ; cr lf to printer
- call printm
- lxi h,rpackm
- call printm
- lxi h,recpkt+1
- call printm
- lxi h,princr
- call printm
- lxi h,princr
- call printm
-
-
-inpkt7: lxi h,recpkt
- shld pktptr ;Save the packet pointer.
- jmp rskp ;If so we are done.
-
-; getchr - get next character from buffered packet.
-; returns nonskip at end of packet.
-; called by: rpack
-
-getchr: lhld pktptr ;Get the packet pointer.
- mov a,m ;Get the char.
- inx h
- shld pktptr
- ora a ;Is it the null we put at the end of the packet?
- jnz rskp ;If not return retskp.
- ret ;If so return failure.
-;\f
-;
-; inchr - character input loop for file transfer
-; returns: nonskip if timeout or character typed on console
-; (console selected)
-; skip with character from modem in A (parity stripped
-; if necessary; modem selected)
-; preserves bc, de, hl in either case.
-; called by: inpkt
-
-inchr: push h ; save hl and bc
- push b
- lhld timout ;Get initial value for timeout
- shld timval ;[jd]
-inchr0: call selmdm ;select modem
- call inpmdm ;Try to get a character from the modem
- ora a
- jz inchr2 ;if zero, nothing there.
- mov b,a
- lda parity ;Is the parity none?
- cpi parnon
- mov a,b
- jz inchr1 ;If so just return.
- ani 7FH ;Turn off the parity bit.
-inchr1: pop b ;restore registers
- pop h
- jmp rskp ;take skip return, character in A
-
-inchr2: call selcon ;select console
- call inpcon ; Try to get a character from the console
- ora a
- jz inchr6 ;If not go do timer thing
- cpi cr ;Is it a carriage return?
- jz inchr4 ;If so return
- cpi ('Z'-100O) ;Control-Z?
- jz inchr5 ;Yes, go flag it
- cpi ('C'-100O) ;Control-C?
- jz inchr7 ;re-enter, he wants to get out
- cpi ('X'-100O) ;Control-X?
- jnz inchr6 ;No, ignore it. do timer thing.
-inchr5: adi 100O ;Convert to printing range
- sta czseen ;Flag we saw a control-Z
- jmp inchr6 ;[MF] and do timer thing
-inchr4: pop b ; restore registers
- pop h
- ret ;And return
-
-inchr6: lda timflg ;[jd] pick up timer flag
- ora a ;[jd] are we allowed to use timer?
- jz inchr0 ;[jd] no, don't time out
- lhld timval ; decrement fuzzy time-out
- dcx h ;
- shld timval ;((timout-1) * loop time)
- mov a,h ;(Retry if not time-out)
- ora l ;
- jnz inchr0 ;
- call updrtr ;Count as retry (?)
- pop b ;restore registers
- pop h
- ret ;and return to do retry
-
-inchr7: call clrtop ;[hh] clear screen and home cursor
- lda takflg ;[MF]Take-file in progress?
- ani 1 ;[MF]...
- cnz closet ;[MF]Yes, close it and reset TAKE-flag
- ;[MF]so all processing is halted
- jmp kermit ;[hh] then re-enter kermit
-
-;\f
-; CRCCLC - Routine to calculate a CRC-CCITT for a string.
-;
-; This routine will calculate a CRC using the CCITT polynomial for
-; a string.
-;
-; call with: HL/ Address of null-terminated string
-; 16-bit CRC value is returned in DE.
-; Registers BC and HL are preserved.
-;
-; called by: spack, rpack
-
-crcclc: push h ;Save HL
- push b ;And BC
- lxi d,0 ;Initial CRC value is 0
-
-crccl0: mov a,m ;Get a character
- ora a ;Check if zero
- jz crccl1 ;If so, all done
- push h ;Save the pointer
- xra e ;Add in with previous value
- mov e,a ;Get a copy
- ani 0FH ;Get last 4 bits of combined value
- mov c,a ;Get into C
- mvi b,0 ;And make high order zero
- lxi h,crctb2 ;Point at low order table
- dad b ;Point to correct entry
- dad b ; . . .
- push h ;Save the address
- mov a,e ;Get combined value back again
- rrc ;Shift over to make index
- rrc ; . . .
- rrc ; . . .
- ani 1EH ;Keep only 4 bits
- mov c,a ;Set up to offset table
- lxi h,crctab ;Point at high order table
- dad b ;Correct entry
- mov a,m ;Get low order portion of entry
- xra d ;XOR with previous high order half
- inx h ;Point to high order byte
- mov d,m ;Get into D
- pop h ;Get back pointer to other table entry
- xra m ;Include with new high order half
- mov e,a ;Copy new low order portion
- inx h ;Point to other portion
- mov a,m ;Get the other portion of the table entry
- xra d ;Include with other high order portion
- mov d,a ;Move back into D
-
- pop h ;And H
- inx h ;Point to next character
- jmp crccl0 ;Go get next character
-
-crccl1: pop b ;Restore B
- pop h ;And HL
-
- ret ;And return, DE=CRC-CCITT
-
-CRCTAB: DW 00000H
- DW 01081H
- DW 02102H
- DW 03183H
- DW 04204H
- DW 05285H
- DW 06306H
- DW 07387H
- DW 08408H
- DW 09489H
- DW 0A50AH
- DW 0B58BH
- DW 0C60CH
- DW 0D68DH
- DW 0E70EH
- DW 0F78FH
-
-CRCTB2: DW 00000H
- DW 01189H
- DW 02312H
- DW 0329BH
- DW 04624H
- DW 057ADH
- DW 06536H
- DW 074BFH
- DW 08C48H
- DW 09DC1H
- DW 0AF5AH
- DW 0BED3H
- DW 0CA6CH
- DW 0DBE5H
- DW 0E97EH
- DW 0F8F7H
-;\f
-; This is where we go if we get an error during a protocol communication.
-; error prints the error packet on line 6 or so, and aborts the
-; transfer.
-; called by: rinit, rfile, rdata, sinit, sfile, sdata, seof, seot
-; error1 print CRLF followed by the error packet.
-; called by: finish, logout
-; error2 just prints the error packet.
-; error3 positions cursor and prints error message specified in DE.
-; called by: rinit, rfile, rdata, sinit, sfile, sdata, seof,
-; seot, parwrn, gofil, outbuf
-
-error: lda quietd ; a quiet display?
- ana a
- jnz error0 ; so dont say a thing
- lda remtxt ;[MF]Doing a remote command?
- ora a ;[MF]...
- jnz error0 ;[MF]Yes, don't position cursor
- call screrr ;Position the cursor.
-error0: mvi a,'A' ;Set the state to abort.
- sta state
- jmp error2
-
-error1: lxi d,crlf ;Print a CRLF.
- lda quietd ; a quiet display?
- ana a
- jnz error2 ; so dont say a thing
- call prtstr
-error2: lda argblk+1 ;Get the length of the data.
- mov c,a
- mvi b,0 ;Put it into BC
- lxi h,data ;Get the address of the data.
- dad b ;Get to the end of the string.
- mvi m,'$' ;Put a dollar sign at the end.
- lxi d,data ;Print error message
- lda remtxt ;[MF]Doing a remote command?
- ora a ;[MF]...
- jnz errr2a ;[MF]Yes, print message, quiet or not!
- lda quietd ; a quiet display?
- ana a
- rnz ; so dont say a thing
-errr2a: call prtstr
- ret
-
-error3: lda quietd ; a quiet display?
- ana a
- rnz ; so dont say a thing
- lda remtxt ;[MF]Doing a remote command?
- ora a ;[MF]...
- jnz err3a ;[MF]Yes, don't position cursor
- push d ;Save the pointer to the message.
- call screrr ;Position the cursor.
- pop d ;Get the pointer back.
-err3a: call prtstr ;Print error message
- ret
-;\f
-; Set up for file transfer.
-; called by read, send.
-
-init: lxi d,version ; point at Kermit's version string
- lda quietd ; a quiet display?
- ana a
- jnz init1 ; so dont say a thing
- call sysscr ; fix up screen
-init1: call selmdm ; select modem
- call flsmdm ; purge any pending data
- call selcon ; select console again.
- ret
-
-; Set state to ABORT
-; called by: rinit, rfile, rdata, sinit, sfile, sdata, seof, seot,
-; nak, ackp
-
-abort: mvi a,'A' ;Otherwise abort.
- sta state
- ret
-
-; nak - send NAK packet
-; here from: rinit, rfile, rdata
-; nak0 - update retry count and send NAK packet
-; here from: rinit, rfile, rdata, tryagn
-
-nak0: call updrtr ;Update number of retries.
-nak: lda pktnum ;Get the packet number we're waiting for.
- sta argblk
- xra a ;No data.
- sta argblk+1
- mvi a,'N' ;NAK that packet.
- call spack
- jmp abort ; Give up.
- ret ;Go around again.
-
-; increment and display retry count
-; called by: rfile, sinit, sfile, sdata, seof, seot,
-; nak, rpack, inchr, tryagn
-
-updrtr: lhld numrtr
- inx h ;Increment the number of retries
- shld numrtr
- lda remtxt ;[MF]Doing a remote server command?
- ora a ;[MF]...
- rnz ;[MF]Yes, keep mum
- lda quietd ; a quiet display?
- ana a
- rnz ; so dont say a thing
- call scrnrt ;Position cursor
- lhld numrtr ;[MF]
-call nout ;Write the number of retries.
- ret
-
-; [jd] this routine prints parity warnings. All registers are
-; saved except for a.
-; called by: sdata
-
-parwrn: push b
- push d
- push h
- lxi d,inms25
- call error3
- pop h
- pop d
- pop b
- ret
-;[jd] end of addition
-
-; print message in status field. address of message is in DE.
-; called by: read, send
-
-finmes: lda quietd ; a quiet display?
- ana a
- jz finme0 ; so do usual stuff
- push d ;[MF]Save pointer to completion message
- call prcrlf ; best do a new line
- pop d ;[MF]Restore completion message pointer
- call prtstr ; and send message
- mvi e,space ; send a space or two
- mvi c,dconio
- push b
- push d
- call bdos
- pop d
- pop b
- call bdos
- ret ; and exit back
-;
-;else for screaming screens...
-
-finme0: push d ;Save message.
- call scrst ;Position cursor
- pop d ;Print the termination message
- call prtstr
- ret ; may not want this **************
-
- mvi c,4 ;[2] copy across user no and drive
- lxi h,kerm1 ;[2] as we have the text already
-finme1: mov e,m
- push h ;[2] conout probably destroys these
- push b
- call conout
- pop b
- pop h
- inx h ;[2] next character
- dcr c ;[2] ah, but have we done?
- jnz finme1 ;[2] nope
- lxi d,spac15 ;[2] send 15 spaces (clears previous filename)
- call prtstr ;[2]
- call scrend ;Position cursor for prompt
- ret
-
-; Compare expected packet number against received packet number.
-; return with flags set (Z = packet number valid)
-; called by: rfile, rdata, sinit, sfile, sdata, seof, seot
-
-compp: lda pktnum ;Get the packet Nr.
- mov b,a
- lda argblk
- cmp b
- ret
-
-; Increment the packet number, modulo 64.
-; called by: rinit, rfile, rdata, sinit, sfile, sdata, seof, seot
-
-countp: inr a ;Increment packet Nr.
- ani 3FH ;Turn off the two high order bits
- sta pktnum ;Save modulo 64 of number
- lhld numpkt
- inx h ;Increment Nr. of packets
- shld numpkt
- ret
-
-; Send an ACK-packet
-; called by: rfile, rdata, tryagn
-
-ackp: xra a
- sta numtry ;Reset number of retries
- sta argblk+1 ;No data. (The packet number is in argblk)
- mvi a,'Y' ;Acknowledge packet
- call spack ;Send packet
- jmp abort
- ret
-
-; ?
-; called with A/ current retry count
-; called by: rfile, rdata
-
-tryagn: inr a ;Increment it.
- sta oldtry ;Save the updated number of tries.
- lda pktnum ;Get the present packet number.
- dcr a ;Decrement
- ani 3FH ; modulo 64
- mov b,a
- lda argblk ;Get the packet's number
- cmp b ;Is the packet's number one less than now?
- jnz nak0 ;No, NAK it and try again.
- call updrtr ;Update the number of retries.
- call ackp
- ret
-
-; Output a null-terminated string to the console. We assume that the
-; console has been selected. Called with HL = address of string.
-; called by: spack, inpkt
-
-dmptxt: mov a,m ; get character from string
- ora a
- rz ; done if null
- push h ; save string address
- mov e,a ; move character to E for outcon
- call outcon ; output character to console
- pop h ; restore string address
- inx h ; point past printed character
- jmp dmptxt ; go output rest of string
-
-
-; Output a null-terminated string to the PRINTER We assume that the
-; console has been selected. Called with HL = address of string.
-; called by: spack, inpkt
-
-printm: mov a,m ; get character from string
- ora a
- rz ; done if null
- push h ; save string address
- mov e,a ; move character to E for outcon
- call outprn ; output character to printer
- pop h ; restore string address
- inx h ; point past printed character
- jmp printm ; go output rest of string
-
-
-;\f
-; test if character in A is the start of header character. We get
-; the start of packet character from sohchr, which can be SET
-tstsoh: push b ; save these registers for a bit
- mov c,a ; we have to test if this is the character
- lda sohchr
- cmp c ; if zero, then it is
- mov a,c ; restore accumulator but not flags
- pop b
- ret ; return with flags set
-;
-
-
-; Little code to allow some expansion of code without changing
-; every futher address, only up to the end of this file.
-; TO BE REMOVED FRO RELEASE!
-
-; org ($+100h) AND 0FF00H
-
-
-IF lasm
- LINK CPSREM
-ENDIF;lasm
+; CPSPK2.ASM\r
+; KERMIT - (Celtic for "FREE")\r
+;\r
+; This is the CP/M-80 implementation of the Columbia University\r
+; KERMIT file transfer protocol.\r
+;\r
+; Version 4.0\r
+;\r
+; Copyright June 1981,1982,1983,1984\r
+; Columbia University\r
+;\r
+; Originally written by Bill Catchings of the Columbia University Center for\r
+; Computing Activities, 612 W. 115th St., New York, NY 10025.\r
+;\r
+; Contributions by Frank da Cruz, Daphne Tzoar, Bernie Eiben,\r
+; Bruce Tanner, Nick Bush, Greg Small, Kimmo Laaksonen, Jeff Damens, and many\r
+; others. \r
+;\r
+; This file contains the (system-independent) routines that implement\r
+; the KERMIT protocol, and the commands that use them:\r
+; RECEIVE, SEND, FINISH, and LOGOUT.\r
+;\r
+; revision history:\r
+;\r
+;edit 11, 21-Mar-1991 by MF. After "inchr7", close TAKE-file (if any) so\r
+; ^C will halt all processing (including commands from TAKE-files)\r
+; and put the user back at Kermit command-level.\r
+;edit 10, 3-Jan-1991 by MF. Modify routine "inchr" after label "inchr5" to\r
+; not take retry (nonskip) return if ^X/^Z seen on the Console. This\r
+; will prevent multiple copies of packets being sent if user aborts\r
+; some files in a stream being sent via ^X and is a better fix to this\r
+; problem than flushing comm input before sending the "Z" packet\r
+; requesting the remote Kermit to discard the current file being\r
+; received (as implemented in CPSPK1.ASM edit of 2-jan-1991).\r
+;edit 9, 14-Dec-1990 by MF. Modified "gofil" routine to allow for\r
+; specification of a drive in the local filespec for GET and\r
+; RECEIVE commands. Thus commands such as\r
+; GET HELLO.TXT B:GOODBYE.TXT\r
+; and\r
+; RECEIVE B:GOODBYE.TXT\r
+; now work as expected.\r
+;edit 8, 22-Oct-1990 by MF. Fixed bug in completion-message routine\r
+; "finmes" wherein the completion message was not printed if the\r
+; terminal was set to QUIET because the message pointer was clobbered\r
+; by prcrlf.\r
+;edit 7, 14-Sep-1990 by MF. Add hooks for SET COLLISION command.\r
+; Eliminate commented-out old file warning rename routine.\r
+; Clear communication input buffers (call flsmdm) before\r
+; BYE, FINISH and LOGOUT commands.\r
+;edit 6, 9-Sep-1990 by MF. Implemented fixes in CPKERM.BWR for\r
+; garbage printout during quiet transfers and for file existence/\r
+; rename algorithm.\r
+; Also implemented hooks for Remote commands.\r
+; edit 5, 18 June 1990 by Russell Lang [rjl@monu1.cc.monash.edu.au]\r
+; When trying to generate a unique file name on receive, zero\r
+; the attribute bits between file opening attempts. This is\r
+; to fix a bug which caused the unique file name to have the\r
+; attributes of the already existing file. If the attribute\r
+; was R/O, a bdos error occured later when an attempt was made\r
+; to write to the file.\r
+;\r
+; edit 4, 27 October, 1987 By OBSchou. Changed the rename routine to \r
+; be more like the MSDOS issue.\r
+;\r
+; edit 3, 28 July, by OBSchou. Added traps to NOT print to screen during\r
+; file transfers if quietd is non zero (ie we SET TERMINAL QUIET)\r
+; This hopefully speeds up transfers in systems spending an age\r
+; updating the screen.\r
+;\r
+; edit 2, 8 April, 1987 by OBSchou. Minor edit to put drive and user number\r
+; in the "filename" field on the transfer screen. This means that the\r
+; offset on the line foe the file name proper has moved along 4 space. \r
+; Also, it writes 15 spaces AFER the xxd: string to clear the field \r
+; of any prevous file. Needed for thos terminals that cannot\r
+; clear to end of line...\r
+;\r
+; edit 1, 28 January, 1987 by OBSchou.\r
+; Hived off about 1/2 of CPSPKT.ASM to form two (smaller => easier\r
+; to handle) files. \r
+;\r
+;\r
+\r
+pk2ver: db 'CPSPK2.ASM (11) 21-Mar-1991$' ; name, edit number, date\r
+\r
+\r
+;\r
+; Get the file name (including host to micro translation)\r
+; called by: rfile\r
+\r
+gofil: xra a\r
+ sta fcb ;Set the drive to default to current.\r
+ lxi h,data ;Get the address of the file name.\r
+; allow use of local name if one was given [gnn]\r
+ lda remlen ;[gnn] \r
+ ora a ;[gnn] anything there?\r
+ jz gofil0 ;[gnn] no, use the one in the data packet\r
+ lxi h,remnam ;[gnn] yes, use this instead\r
+ lda remnam+1 ;[MF]Get 2nd char of local filename\r
+ cpi ':' ;[MF]Was a drive specified?\r
+ jnz gofil0 ;[MF]No, proceed as of old\r
+ mov a,m ;[MF]Yes, get drive\r
+ ani 5fh ;[MF]Force uppercase\r
+ sui 'A'-1 ;[MF]Make valid drive for fcb\r
+ sta fcb ;[MF]and store in fcb\r
+ inx h ;[MF]Skip drive and delimiter\r
+ inx h ;[MF]...\r
+gofil0: ;[gnn] continue to set up the file [gnn]\r
+;\r
+ shld datptr ;Store the address.\r
+ lxi h,fcb+1 ;Address of the FCB.\r
+ shld fcbptr ;Save it.\r
+ xra a\r
+ sta temp1 ;Initialize the char count.\r
+ sta temp2\r
+ mvi b,' '\r
+gofil1: mov m,b ;Blank the FCB.\r
+ inx h\r
+ inr a\r
+; cpi 0CH ;Twelve?[5a]\r
+ cpi 0BH ; Eleven? [5a]\r
+ jm gofil1\r
+ mvi m,0 ; [5a] Specify extent 0\r
+gofil2: lhld datptr ;Get the NAME field.\r
+ mov a,m\r
+ cpi 'a' ;Force upper case\r
+ jm gofl2a ;\r
+ ani 5FH ;\r
+gofl2a: inx h\r
+ cpi '.' ;Seperator?\r
+ jnz gofil3\r
+ shld datptr ;[jd] update ptr (moved from above)\r
+ lxi h,fcb+9H\r
+ shld fcbptr\r
+ lda temp1\r
+ sta temp2\r
+ mvi a,9H\r
+ sta temp1\r
+ jmp gofil6\r
+\r
+gofil3: ora a ;Trailing null?\r
+ jz gofil7 ;Then we're done.\r
+ shld datptr ;[jd] no, can update ptr now.\r
+ lhld fcbptr\r
+ mov m,a\r
+ inx h\r
+ shld fcbptr\r
+ lda temp1 ;Get the char count.\r
+ inr a\r
+ sta temp1\r
+ cpi 8H ;Are we finished with this field?\r
+ jm gofil2\r
+gofil4: sta temp2\r
+ lhld datptr\r
+ mov a,m\r
+ inx h\r
+ shld datptr\r
+ ora a\r
+ jz gofil7\r
+ cpi '.' ;Is this the terminator?\r
+ jnz gofil4 ;Go until we find it.\r
+gofil6: lhld datptr ;Get the TYPE field.\r
+ mov a,m\r
+ cpi 'a' ;Force upper case\r
+ jm gofl6a ;\r
+ ani 5FH ;\r
+gofl6a: ora a ;Trailing null?\r
+ jz gofil7 ;Then we're done.\r
+;[jd] move above two lines so we don't increment pointer if char is null\r
+ inx h\r
+ shld datptr\r
+ lhld fcbptr\r
+ mov m,a\r
+ inx h\r
+ shld fcbptr\r
+ lda temp1 ;Get the char count.\r
+ inr a\r
+ sta temp1\r
+ cpi 0CH ;Are we finished with this field?\r
+ jm gofil6\r
+gofil7: lhld datptr\r
+ mvi m,'$' ;Put in a dollar sign for printing.\r
+ lda quietd ; quiet display?\r
+ ana a\r
+ jnz gofi70 ; yes, so skip it.\r
+ call scrfln ;Position cursor\r
+gofi70: lxi d,data ;Print the file name\r
+ lda getrxflg ;[obs 8] are we doing a get or receive?\r
+ ana a ;[obs 8]\r
+ jz gofi7a ;[obs 8] if zero, receive\r
+ lxi d,remnam ;[obs 8]\r
+gofi7a: ;[obs 8]\r
+\r
+ call prtstr\r
+gofi7b: xra a ;[MF]Zero "discard" flag\r
+ sta dscflg ;[MF]...\r
+ lda flwflg ;Is file warning on?\r
+ ora a\r
+ jz gofil9 ;If not, just proceed.\r
+ mvi c,openf ;See if the file exists.\r
+ lxi d,fcb\r
+ call bdos\r
+ cpi 0FFH ;Does it exist?\r
+ jz gofil9 ;If not create it.\r
+;\r
+ lda flwflg ;[MF]Get flag again\r
+ cpi 3 ;[MF]SET COLLISION DISCARD?\r
+ jnz gofi7h ;[MF]No\r
+ mvi a,0ffh ;[MF]Yes, order rejection of the file\r
+ sta dscflg ;[MF]...\r
+ jmp rskp ;[MF]and pretend successful open\r
+gofi7h: push psw ;[MF]Save Collision status\r
+ lxi d,infms5\r
+ call error3\r
+ pop psw ;[MF]Restore Collision status\r
+ cpi 1 ;[MF]SET COLLISION RENAME?\r
+ jz gofi7i ;[MF]Yes, same as SET WARNING ON\r
+ ;[MF]If we come here, SET COLLISION BACKUP\r
+ lxi h,fcb ;[MF]Copy original fcb to a safe place\r
+ lxi d,colfcb ;[MF]...\r
+ lxi b,33 ;[MF]...\r
+ call mover ;[MF]...\r
+ ;[MF]and fall into rename code\r
+gofi7i: ;[MF]\r
+;\r
+; Replacement file name renamer routine. Incomming\r
+; files are renamed in this manner:\r
+; original file name: filex.ext\r
+; first rename: filex001.ext\r
+; ... ...\r
+; ninth rename filex009.ext\r
+; 10th rename fail - would we really want 10\r
+; files of the same name??\r
+;\r
+;\r
+; 1)\r
+; Assume that we need to "rename" the file, so lets make sure\r
+; that there is a full. 8 character filename. (We make it if \r
+; it does not already exist)\r
+; 1a) If full file name, last character is to be replaced\r
+; by a zero. This gives us up to no#ine renames.\r
+; 2)open file\r
+; 2a)If exists, increment last character by one\r
+; 2b)if = '9' then abort\r
+; 2c)If does not exist, got 2)\r
+; 3)we have a valid 'renamed' file\r
+;\r
+;Part 1) - fill out filename part \r
+\r
+ mvi c,8 ; max 8 characters to test for\r
+ mvi a,'0' ; spaces to be replaced by a zero.\r
+ lxi h,fcb+8 ; start at the end\r
+gofi7c: mov m,a ; put a zero in here\r
+ dcr c ; come to the end?\r
+ jz gofi7d ; should not have, but just in case...\r
+ dcx h ; previous chararcter\r
+ mov a,m ; get it\r
+ cpi ' ' ; if this character a space as well, zero it\r
+ mvi a,'0' ; set it to ascii zero just in case...\r
+ jz gofi7c ;\r
+;\r
+; Part 2) open the file (if success, then it exists)\r
+\r
+gofi7d:\r
+;zero the attribute bits. [rjl@monu1.cc.monash.edu.au]\r
+ lxi h,fcb+1 ;[rjl]\r
+ mvi c,11 ;[rjl]\r
+gofi7z: mov a,m ;[rjl]\r
+ ani 07fh ;[rjl]\r
+ mov m,a ;[rjl]\r
+ inx h ;[rjl]\r
+ dcr c ;[rjl]\r
+ jnz gofi7z ;[rjl]\r
+ lxi d,fcb\r
+ mvi c,openf\r
+ call BDOS\r
+ inr a ; if 0ffh returned, error (ie does not exist)\r
+ jz gofi7e\r
+ lda fcb+8 ; get last character\r
+ inr a\r
+ sta fcb+8\r
+ cpi '9'+1 ; more than '9' => too far, lets give up.\r
+ jnz gofi7d ; else try again\r
+;Giving up, so lets exit\r
+ lxi d,erms16 ;\r
+ call prtstr\r
+ ret ; return to error routine\r
+\r
+gofi7e: lxi d,fnbuf ; make the file name into a character string\r
+ lxi h,fcb+1 ; point to source file name, less drive name\r
+ mvi c,8 ; 11 characters (8+3) + dot to copy across\r
+;\r
+gofi7f: mov a,m ; get character\r
+ stax d\r
+ inx h\r
+ inx d\r
+ dcr c\r
+ jnz gofi7f ; loop until all done\r
+\r
+ mvi a,'.' ; then the dot\r
+ stax d\r
+ inx d\r
+\r
+ mvi c,3 ; then the file extention\r
+\r
+gofi7g: mov a,m\r
+ stax d\r
+ inx h\r
+ inx d\r
+ dcr c\r
+ jnz gofi7g ; loop until extention copied across\r
+\r
+ mvi a,'$' ; dollar terminate string\r
+ stax d\r
+ lxi d,fnbuf ;[MF]Point to string\r
+ call prtstr ; write string to console\r
+\r
+ lda flwflg ;[MF]Get warning (SET COLLISION) flag\r
+ cpi 2 ;[MF]SET COLLISION BACKUP?\r
+ jnz gofil9 ;[MF]No\r
+ lxi h,fcb ;[MF]Yes, get new filename fcb\r
+ lxi d,colfcb+16 ;[MF]Where to copy to for rename\r
+ lxi b,16 ;[MF]Copy 16 bytes\r
+ call mover ;[MF]...\r
+ lxi d,colfcb ;[MF]Point to rename fcb\r
+ mvi c,renam ;[MF]Rename function\r
+ call bdos ;[MF]Try to rename original file\r
+ cpi 0ffh ;[MF]Did we win?\r
+ jnz gofl82 ;[MF]Yes\r
+ lxi d,erms16 ;[MF]No, complain and bomb\r
+ jmp error3 ;[MF]...\r
+gofl82: lxi h,colfcb ;[MF]Now recopy original filename into fcb\r
+ lxi d,fcb ;[MF]to create new file with original name\r
+ lxi b,16 ;[MF]...\r
+ call mover ;[MF]...\r
+;\r
+;\r
+;Now lets make the file (create it)\r
+\r
+gofil9: call makfil ; Create the file.\r
+ jmp gofl91 ; Disk was full.\r
+ jmp rskp ; Success.\r
+ \r
+gofl91: lxi d,erms11\r
+ call error3\r
+ ret\r
+;\f\r
+; This is the FINISH command. It tells the remote KERSRV to exit.\r
+; here from kermit\r
+\r
+finish: call cfmcmd\r
+ call selmdm ;[MF]Select modem\r
+ call flsmdm ;[MF]Flush buffers\r
+ call selcon ;[MF]Select keyboard again\r
+ xra a\r
+ sta numtry ;Inititialize count.\r
+ mvi a,'1' ;Reset block check type to single character\r
+ sta curchk ; . . .\r
+\r
+finsh1: lda numtry ;How many times have we tried?\r
+ cpi maxtry ;Too many times?\r
+ jm finsh3 ;No, try it.\r
+finsh2: lxi d,erms18 ;Say we couldn't do it.\r
+ call prtstr\r
+ jmp kermit ;Go home.\r
+\r
+finsh3: inr a ;Increment the number of tries.\r
+ sta numtry\r
+ xra a\r
+ sta argblk ;Make it packet number zero.\r
+ mvi a,1\r
+ sta argblk+1 ;One piece of data.\r
+ lxi h,data\r
+ mvi m,'F' ;Finish running Kermit.\r
+ mvi a,'G' ;Generic command packet.\r
+ call spack\r
+ jmp finsh2 ; Tell the user and die.\r
+ call rpack ;Get an acknowledgement.\r
+ jmp finsh1 ; Go try again.\r
+ cpi 'Y' ;ACK?\r
+ jz kermit ;Yes, we are done.\r
+ cpi 'E' ;Is it an error packet?\r
+ jnz finsh1 ;Try sending the packet again.\r
+ call error1 ;Print the error message.\r
+ jmp kermit\r
+;\f\r
+; This is the LOGOUT command. It tells the remote KERSRV to logout.\r
+; here from: kermit\r
+\r
+logout: call cfmcmd\r
+ call logo ;Send the logout packet.\r
+ jmp kermit ;Go get another command\r
+ jmp kermit ; whether we succeed or not.\r
+\r
+; do logout processing.\r
+; called by: bye, logout\r
+\r
+logo: call selmdm ;[MF]Select modem\r
+ call flsmdm ;[MF]Flush buffers\r
+ call selcon ;[MF]Select keyboard again\r
+ xra a\r
+ sta numtry ;Inititialize count.\r
+ mvi a,'1' ;Reset block check type to single character\r
+ sta curchk ; . . .\r
+\r
+logo1: lda numtry ;How many times have we tried?\r
+ cpi maxtry ;Too many times?\r
+ jm logo3 ;No, try it.\r
+logo2: lxi d,erms19 ;Say we couldn't do it.\r
+ call prtstr\r
+ ret ;Finished.\r
+\r
+logo3: inr a ;Increment the number of tries.\r
+ sta numtry\r
+ xra a\r
+ sta argblk ;Make it packet number zero.\r
+ mvi a,1\r
+ sta argblk+1 ;One piece of data.\r
+ lxi h,data\r
+ mvi m,'L' ;Logout the remote host.\r
+ mvi a,'G' ;Generic command packet.\r
+ call spack\r
+ jmp logo2 ; Tell the user and die.\r
+ call rpack ;Get an acknowledgement\r
+ jmp logo1 ; Go try again.\r
+ cpi 'Y' ;ACK?\r
+ jz rskp ;Yes, we are done.\r
+ cpi 'E' ;Is it an error packet?\r
+ jnz logo1 ;Try sending the packet again.\r
+ call error1 ;Print the error message.\r
+ ret ;All done.\r
+;\f\r
+; Packet routines\r
+\r
+; Send_Packet\r
+; This routine assembles a packet from the arguments given and sends it\r
+; to the host.\r
+;\r
+; Expects the following:\r
+; A - Type of packet (D,Y,N,S,R,E,F,Z,T)\r
+; ARGBLK - Packet sequence number\r
+; ARGBLK+1 - Number of data characters\r
+; Returns: nonskip if failure\r
+; skip if success\r
+; called by: read, rinit, rfile, rdata, sinit, sfile, sdata, seof, seot,\r
+; finish, logout, nak, ackp\r
+\r
+spack: sta argblk+2\r
+ lxi h,packet ;Get address of the send packet.\r
+ lda sndsop ;[gnn] send start-of-pkt char.\r
+ mov m,a ;Put in the packet.\r
+ inx h ;Point to next char.\r
+ lda curchk ;Get current checksum type\r
+ sui '1' ;Determine extra length of checksum\r
+ mov b,a ;Copy length\r
+ lda argblk+1 ;Get the number of data chars.\r
+ adi ' '+3 ;Real packet character count made printable.\r
+ add b ;Determine overall length\r
+ mov m,a ;Put in the packet.\r
+ inx h ;Point to next char.\r
+ lxi b,0 ;Zero the checksum AC.\r
+ mov c,a ;Start the checksum.\r
+ lda argblk ;Get the packet number.\r
+ adi ' ' ;Add a space so the number is printable.\r
+ mov m,a ;Put in the packet.\r
+ inx h ;Point to next char.\r
+ add c\r
+ mov c,a ;Add the packet number to the checksum.\r
+ mvi a,0 ;Clear A (Cannot be XRA A, since we can't\r
+ ; touch carry flag)\r
+ adc b ;Get high order portion of checksum\r
+ mov b,a ;Copy back to B\r
+ lda argblk+2 ;Get the packet type.\r
+ mov m,a ;Put in the packet.\r
+ inx h ;Point to next char.\r
+ add c\r
+ mov c,a ;Add the packet number to the checksum.\r
+ mvi a,0 ;Clear A\r
+ adc b ;Get high order portion of checksum\r
+ mov b,a ;Copy back to B\r
+spack2: lda argblk+1 ;Get the packet size.\r
+ ora a ;Are there any chars of data?\r
+ jz spack3 ; No, finish up.\r
+ dcr a ;Decrement the char count.\r
+ sta argblk+1 ;Put it back.\r
+ mov a,m ;Get the next char.\r
+ inx h ;Point to next char.\r
+ add c\r
+ mov c,a ;Add the packet number to the checksum.\r
+ mvi a,0 ;Clear A\r
+ adc b ;Get high order portion of checksum\r
+ mov b,a ;Copy back to B\r
+ jmp spack2 ;Go try again.\r
+\r
+spack3: lda curchk ;Get the current checksum type\r
+ cpi '2' ;Two character?\r
+ jz spack4 ;Yes, go handle it\r
+ jnc spack5 ;No, go handle CRC if '3'\r
+ mov a,c ;Get the character total.\r
+ ani 0C0H ;Turn off all but the two high order bits.\r
+ ;Shift them into the low order position.\r
+ rlc ;Two left rotates same as 6 rights\r
+ rlc ; . . .\r
+ add c ;Add it to the old bits.\r
+ ani 3FH ;Turn off the two high order bits. (MOD 64)\r
+ adi ' ' ;Add a space so the number is printable.\r
+ mov m,a ;Put in the packet.\r
+ inx h ;Point to next char.\r
+ jmp spack7 ;Go store eol character\r
+\r
+;Here for 3 character CRC-CCITT\r
+\r
+spack5: mvi m,0 ;Store a null for current end\r
+ push h ;Save H\r
+ lxi h,packet+1 ;Point to first checksumed character\r
+ call crcclc ;Calculate the CRC\r
+ pop h ;Restore the pointer\r
+ mov c,e ;Get low order half for later\r
+ mov b,d ;Copy the high order\r
+ mov a,d ;Get the high order portion\r
+ rlc ;Shift off low 4 bits\r
+ rlc ; . . .\r
+ rlc ; . . .\r
+ rlc ; . . .\r
+ ani 0FH ;Keep only low 4 bits\r
+ adi ' ' ;Put into printing range\r
+ mov m,a ;Store the character\r
+ inx h ;Point to next position\r
+\r
+;Here for two character checksum\r
+\r
+spack4: mov a,b ;Get high order portion\r
+ ani 0FH ;Only keep last four bits\r
+ rlc ;Shift up two bits\r
+ rlc ; . . .\r
+ mov b,a ;Copy back into safe place\r
+ mov a,c ;Get low order half\r
+ rlc ;Shift high two bits\r
+ rlc ;to low two bits\r
+ ani 03H ;Keep only two low bits\r
+ ora b ;Get high order portion in\r
+ adi ' ' ;Convert to printing character range\r
+ mov m,a ;Store the character\r
+ inx h ;Point to next character\r
+ mov a,c ;get low order portion\r
+ ani 3FH ;Keep only six bits\r
+ adi ' ' ;Convert to printing range\r
+ mov m,a ;Store it\r
+ inx h ;Bump the pointer\r
+\r
+spack7: lda dbgflg\r
+ ora a ; is debugging enabled?\r
+ jz spack8\r
+ push h ; yes. save address of end of packet\r
+ mvi m,0 ; null-terminate the packet for display\r
+ lda quietd ; a quiet display?\r
+ ana a\r
+ jnz spac7a ; so dont say a thing\r
+ call sppos ; position cursor\r
+ lxi h,packet+1 ; print the packet\r
+ call dmptxt\r
+ lda prnflg ; is the printer on too?\r
+ ana a\r
+ jz spac7a\r
+ lxi h,sstatm ; print state\r
+ call printm ; dumptext but to printer\r
+ lda state\r
+ mov e,a\r
+ call outprn\r
+ lxi h,princr ; cr lf to printer\r
+ call printm\r
+ lxi h,spackm\r
+ call printm\r
+ lxi h,packet+1\r
+ call printm\r
+ lxi h,princr\r
+ call printm\r
+ lxi h,princr\r
+ call printm\r
+\r
+spac7a: pop h ; restore address of end of packet\r
+spack8: lda seol ;Get the EOL the other host wants.\r
+ mov m,a ;Put in the packet.\r
+ inx h ;Point to next char.\r
+ xra a ;Get a null.\r
+ mov m,a ;Put in the packet.\r
+; Write out the packet.\r
+outpkt: call selmdm ; Set up for output to comm port if iobyt\r
+ lda spad ;Get the number of padding chars.\r
+ sta temp1\r
+outpk2: lda temp1 ;Get the count.\r
+ dcr a\r
+ ora a\r
+ jm outpk6 ;If none left proceed.\r
+ sta temp1\r
+ lda spadch ;Get the padding char.\r
+ call setpar ;Set parity appropriately\r
+ mov e,a ;Put the char in right AC.\r
+ call outmdm ;Output it.\r
+ jmp outpk2\r
+\r
+outpk6: lxi h,packet ; Point to the packet.\r
+outlup: mov a,m ; Get the next character.\r
+ ora a ; Is it a null?\r
+ jz outlud ; If so return success.\r
+ call setpar ; Set parity for the character\r
+ mov e,a ; Put it in right AC\r
+ call outmdm ; and output it.\r
+; TAC trap: If this character is the TAC intercept character, and the TAC\r
+; trap is enabled, we have to output it twice. If the TAC trap is enabled,\r
+; tacflg contains the intercept character. (The current character cannot\r
+; be NUL, so we don't have to worry about doubling nulls in the message)\r
+ lda tacflg ; get current intercept character, or zero.\r
+ cmp m ; compare against current data character.\r
+ jnz outpk8 ; if different, do nothing.\r
+ call setpar ; match. set appropriate parity,\r
+ mov e,a ; put it in the right register,\r
+ call outmdm ; and output it a second time.\r
+outpk8:\r
+ inx h ; Increment the char pointer.\r
+ jmp outlup\r
+\r
+outlud: call selcon ; select console\r
+ jmp rskp ; and return success\r
+;\f\r
+; Receive_Packet\r
+; This routine waits for a packet to arrive from the host. It reads\r
+; characters until it finds a SOH. It then reads the packet into packet.\r
+;\r
+; Returns: nonskip if failure (checksum wrong or packet trashed)\r
+; skip if success, with\r
+; A - message type\r
+; ARGBLK - message number\r
+; ARGBLK+1 - length of data\r
+; called by: rinit, rfile, rdata,\r
+; sinit, sfile, sdata, seof, seot, finish, logout\r
+\r
+rpack: call inpkt ;Read up to the end-of-line character\r
+ jmp r ; Return bad.\r
+rpack0: call getchr ;Get a character.\r
+ jmp rpack ; Hit eol;null line;just start over.\r
+ lxi h,rcvsop ;[gnn] Is it receive start-of-pkt char.\r
+ cmp m ;[gnn]\r
+ jnz rpack0 ; No, go until it is.\r
+rpack1: call getchr ;Get a character.\r
+ jmp r ; Hit end of line, return bad.\r
+ lxi h,rcvsop ;[gnn] Is it receive start-of-pkt char.\r
+ cmp m ;[gnn]\r
+ jz rpack1 ; Yes, then go start over.\r
+ sta packet+1 ;Store in packet also\r
+ mov c,a ;Start the checksum.\r
+ lda curchk ;Get block check type\r
+ sui '1' ;Determine extra length of block check\r
+ mov b,a ;Get a copy\r
+ mov a,c ;Get back length character\r
+ sui ' '+3 ;Get the real data count.\r
+ sub b ;Get total length\r
+ sta argblk+1\r
+ mvi b,0 ;Clear high order half of checksum\r
+ call getchr ;Get a character.\r
+ jmp r ; Hit end of line, return bad.\r
+ lxi h,rcvsop ;[gnn] Is it receive start-of-pkt char.\r
+ cmp m ;[gnn]\r
+ jz rpack1 ; Yes, then go start over.\r
+ sta argblk\r
+ sta packet+2 ;Save also in packet\r
+ add c\r
+ mov c,a ;Add the character to the checksum.\r
+ mvi a,0 ;Clear A\r
+ adc b ;Get high order portion of checksum\r
+ mov b,a ;Copy back to B\r
+ lda argblk\r
+ sui ' ' ;Get the real packet number.\r
+ sta argblk\r
+ call getchr ;Get a character.\r
+ jmp r ; Hit end of line, return bad.\r
+ lxi h,rcvsop ;[gnn] Is it receive start-of-pkt char.\r
+ cmp m ;[gnn]\r
+ jz rpack1 ; Yes, then go start over.\r
+ sta temp1 ;Save the message type.\r
+ sta packet+3 ;Save in packet\r
+ add c\r
+ mov c,a ;Add the character to the checksum.\r
+ mvi a,0 ;Clear A\r
+ adc b ;Get high order portion of checksum\r
+ mov b,a ;Copy back to B\r
+ lda argblk+1 ;Get the number of data characters.\r
+ sta temp2\r
+ lxi h,data ;Point to the data buffer.\r
+ shld datptr\r
+rpack2: lda temp2\r
+ sui 1 ;Any data characters?\r
+ jm rpack3 ; If not go get the checksum.\r
+ sta temp2\r
+ call getchr ;Get a character.\r
+ jmp r ; Hit end of line, return bad.\r
+ lxi h,rcvsop ;[gnn] Is it receive start-of-pkt char.\r
+ cmp m ;[gnn]\r
+ jz rpack1 ; Yes, then go start over.\r
+ lhld datptr\r
+ mov m,a ;Put the char into the packet.\r
+ inx h ;Point to the next character.\r
+ shld datptr\r
+ add c\r
+ mov c,a ;Add the character to the checksum.\r
+ mvi a,0 ;Clear A\r
+ adc b ;Get high order portion of checksum\r
+ mov b,a ;Copy back to B\r
+ jmp rpack2 ;Go get another.\r
+\r
+rpack3: call getchr ;Get a character.\r
+ jmp r ; Hit end of line, return bad.\r
+ lxi h,rcvsop ;[gnn] Is it receive start-of-pkt char.\r
+ cmp m ;[gnn]\r
+ jz rpack1 ; Yes, then go start over.\r
+ sui ' ' ;Turn the char back into a number.\r
+ sta temp3\r
+;Determine type of checksum\r
+\r
+ lda curchk ;Get the current checksum type\r
+ cpi '2' ;1, 2 or 3 character?\r
+ jz rpack4 ;If zero, 2 character\r
+ jnc rpack5 ;Go handle 3 character\r
+ mov a,c ;Get the character total.\r
+ ani 0C0H ;Turn off all but the two high order bits.\r
+ ;Shift them into the low order position.\r
+ rlc ;Two left rotates same as six rights\r
+ rlc ; . . .\r
+ add c ;Add it to the old bits.\r
+ ani 3FH ;Turn off the two high order bits. (MOD 64)\r
+ mov b,a\r
+ lda temp3 ;Get the real received checksum.\r
+ cmp b ;Are they equal?\r
+ jz rpack7 ;If so, proceed.\r
+rpack9: call updrtr ;If not, update the number of retries.\r
+ ret ;Return error.\r
+\r
+;Here for three character CRC-CCITT\r
+\r
+rpack5: lhld datptr ;Get the address of the data\r
+ mvi m,0 ;Store a zero in the buffer to terminate packet\r
+ lxi h,packet+1 ;Point at start of checksummed region\r
+ call crcclc ;Calculate the CRC\r
+ mov c,e ;Save low order half for later\r
+ mov b,d ;Also copy high order\r
+ mov a,d ;Get high byte\r
+ rlc ;Want high four bits\r
+ rlc ; . . .\r
+ rlc ;And shift two more\r
+ rlc ; . . .\r
+ ani 0FH ;Keep only 4 bits\r
+ mov d,a ;Back into D\r
+ lda temp3 ;Get first value back\r
+ cmp d ;Correct?\r
+ jnz rpack9 ;No, punt\r
+ call getchr ;Get a character.\r
+ jmp r ; Hit end of line, return bad.\r
+ lxi h,rcvsop ;[gnn] Is it receive start-of-pkt char.\r
+ cmp m ;[gnn]\r
+ jz rpack1 ; Yes, then go start over.\r
+ sui ' ' ;Remove space offset\r
+ sta temp3 ;Store for later check\r
+ ;...\r
+\r
+;Here for a two character checksum and last two characters of CRC\r
+\r
+rpack4: mov a,b ;Get high order portion\r
+ ani 0FH ;Only four bits\r
+ rlc ;Shift up two bits\r
+ rlc ; . . .\r
+ mov b,a ;Save back in B\r
+ mov a,c ;Get low order\r
+ rlc ;move two high bits to low bits\r
+ rlc ; . . .\r
+ ani 03H ;Save only low two bits\r
+ ora b ;Get other 4 bits\r
+ mov b,a ;Save back in B\r
+ lda temp3 ;Get this portion of checksum\r
+ cmp b ;Check first half\r
+ jnz rpack9 ;If bad, go give up\r
+ call getchr ;Get a character.\r
+ jmp r ; Hit end of line, return bad.\r
+ lxi h,rcvsop ;[gnn] Is it receive start-of-pkt char.\r
+ cmp m ;[gnn]\r
+ jz rpack1 ; Yes, then go start over.\r
+ sui ' ' ;Remove space offset\r
+ mov b,a ;Save in safe place\r
+ mov a,c ;Get low 8 bits of checksum\r
+ ani 3FH ;Keep only 6 bits\r
+ cmp b ;Correct value\r
+ jnz rpack9 ;Bad, give up\r
+rpack7: lhld datptr\r
+ mvi m,0 ;Put a null at the end of the data.\r
+ lda temp1 ;Get the type.\r
+ jmp rskp\r
+;\f\r
+; inpkt - receive and buffer packet\r
+; returns: nonskip if error (timeout)\r
+; skip if success; packet starts at recpkt (which holds the SOH)\r
+; and is terminated by a null.\r
+; console is selected in either case.\r
+; called by: rpack\r
+\r
+inpkt: lxi h,recpkt ;Point to the beginning of the packet.\r
+ shld pktptr\r
+inpkt1: call inchr ;Get first character\r
+ jmp r ;Return failure\r
+ lxi h,rcvsop ;[gnn] Is it receive start-of-pkt char.\r
+ cmp m ;[gnn]\r
+ jnz inpkt1 ;if not, ignore leading junk\r
+ jmp inpkt3 ;else go put it in packet\r
+\r
+inpkt2: call inchr ;Get a character.\r
+ jmp r ; Return failure.\r
+ lxi h,rcvsop ;[gnn] Is it receive start-of-pkt char.\r
+ cmp m ;[gnn]\r
+ jnz inpkt3 ;if not continue\r
+ lxi h,recpkt ;else throw away what we've got so far\r
+ shld pktptr ;\r
+inpkt3: lhld pktptr ;\r
+ mov m,a ;Put the char in the packet.\r
+ inx h\r
+ shld pktptr\r
+ mov b,a\r
+ lxi d,-recpkx ;Start over if packet buffer overflow\r
+ dad d ;\r
+ jc inpkt ;buffer overflow\r
+ lda reol ;Get the EOL char.\r
+ cmp b\r
+ jnz inpkt2 ;If not loop for another.\r
+;[gnn] *** added by Godfrey Nix Nottingham University ***\r
+;[gnn] to allow Kermit server to echo our packets back\r
+ lxi h,recpkt+3 ;[gnn] point to packet type\r
+ lda packet+3 ;[gnn] get the one we sent\r
+ cmp m ;[gnn] are they the same?\r
+ jz inpkt ;[gnn] yes, get another packet\r
+;[gnn] *** end of patch *****\r
+ ;...\r
+ ;...\r
+\r
+;Begin IBM change/fdc\r
+;This moved from OUTPK7 -- it appears that waiting until we're\r
+;ready to send a packet before looking for turnaround character\r
+;is long enough for it to get lost. Better to look now.\r
+\r
+ lda ibmflg ;Is this the IBM?\r
+ ora a\r
+ jz inpkt6 ;If not then proceed.\r
+ lda state ;Check if this is the Send-Init packet.\r
+ cpi 'S'\r
+ jz inpkt6 ;If so don't wait for the XON.\r
+inpkt5: call inchr ;Wait for the turn around char.\r
+ jmp inpkt6\r
+ cpi xon ;Is it the IBM turn around character?\r
+ jnz inpkt5 ;If not, go until it is.\r
+inpkt6: lhld pktptr ;Reload packet pointer\r
+;End IBM change/fdc.\r
+ dcx h ;Back up to end of line character\r
+ mvi m,0 ;Replace it with a null to stop rpack:\r
+ call selcon ;We've got the packet. Return to console.\r
+\r
+ lda dbgflg ; Is debugging enabled?\r
+ ora a\r
+ jz inpkt7\r
+ inx h ; Point to next char.\r
+ lda quietd ; a quiet display?\r
+ ana a\r
+ jnz inpkt7 ; so dont say a thing\r
+ call rppos ; position cursor\r
+ lxi h,recpkt+1 ; print the packet\r
+ call dmptxt\r
+\r
+ lda prnflg ; is the printer on too?\r
+ ana a\r
+ jz inpkt7\r
+ lxi h,rstatm ; print state\r
+ call printm ; dumptext but to printer\r
+ lda state\r
+ mov e,a\r
+ call outprn\r
+ lxi h,princr ; cr lf to printer\r
+ call printm\r
+ lxi h,rpackm\r
+ call printm\r
+ lxi h,recpkt+1\r
+ call printm\r
+ lxi h,princr\r
+ call printm\r
+ lxi h,princr\r
+ call printm\r
+\r
+\r
+inpkt7: lxi h,recpkt\r
+ shld pktptr ;Save the packet pointer.\r
+ jmp rskp ;If so we are done.\r
+\r
+; getchr - get next character from buffered packet.\r
+; returns nonskip at end of packet.\r
+; called by: rpack\r
+\r
+getchr: lhld pktptr ;Get the packet pointer.\r
+ mov a,m ;Get the char.\r
+ inx h\r
+ shld pktptr\r
+ ora a ;Is it the null we put at the end of the packet?\r
+ jnz rskp ;If not return retskp.\r
+ ret ;If so return failure.\r
+;\f\r
+;\r
+; inchr - character input loop for file transfer\r
+; returns: nonskip if timeout or character typed on console\r
+; (console selected)\r
+; skip with character from modem in A (parity stripped\r
+; if necessary; modem selected)\r
+; preserves bc, de, hl in either case.\r
+; called by: inpkt\r
+\r
+inchr: push h ; save hl and bc\r
+ push b\r
+ lhld timout ;Get initial value for timeout\r
+ shld timval ;[jd] \r
+inchr0: call selmdm ;select modem\r
+ call inpmdm ;Try to get a character from the modem\r
+ ora a\r
+ jz inchr2 ;if zero, nothing there.\r
+ mov b,a\r
+ lda parity ;Is the parity none?\r
+ cpi parnon\r
+ mov a,b\r
+ jz inchr1 ;If so just return.\r
+ ani 7FH ;Turn off the parity bit.\r
+inchr1: pop b ;restore registers\r
+ pop h\r
+ jmp rskp ;take skip return, character in A\r
+\r
+inchr2: call selcon ;select console\r
+ call inpcon ; Try to get a character from the console\r
+ ora a\r
+ jz inchr6 ;If not go do timer thing\r
+ cpi cr ;Is it a carriage return?\r
+ jz inchr4 ;If so return\r
+ cpi ('Z'-100O) ;Control-Z?\r
+ jz inchr5 ;Yes, go flag it\r
+ cpi ('C'-100O) ;Control-C?\r
+ jz inchr7 ;re-enter, he wants to get out\r
+ cpi ('X'-100O) ;Control-X?\r
+ jnz inchr6 ;No, ignore it. do timer thing.\r
+inchr5: adi 100O ;Convert to printing range\r
+ sta czseen ;Flag we saw a control-Z\r
+ jmp inchr6 ;[MF] and do timer thing\r
+inchr4: pop b ; restore registers\r
+ pop h\r
+ ret ;And return\r
+\r
+inchr6: lda timflg ;[jd] pick up timer flag\r
+ ora a ;[jd] are we allowed to use timer?\r
+ jz inchr0 ;[jd] no, don't time out\r
+ lhld timval ; decrement fuzzy time-out\r
+ dcx h ;\r
+ shld timval ;((timout-1) * loop time)\r
+ mov a,h ;(Retry if not time-out)\r
+ ora l ;\r
+ jnz inchr0 ;\r
+ call updrtr ;Count as retry (?)\r
+ pop b ;restore registers\r
+ pop h\r
+ ret ;and return to do retry\r
+\r
+inchr7: call clrtop ;[hh] clear screen and home cursor\r
+ lda takflg ;[MF]Take-file in progress?\r
+ ani 1 ;[MF]...\r
+ cnz closet ;[MF]Yes, close it and reset TAKE-flag\r
+ ;[MF]so all processing is halted\r
+ jmp kermit ;[hh] then re-enter kermit\r
+\r
+;\f\r
+; CRCCLC - Routine to calculate a CRC-CCITT for a string.\r
+;\r
+; This routine will calculate a CRC using the CCITT polynomial for\r
+; a string.\r
+;\r
+; call with: HL/ Address of null-terminated string\r
+; 16-bit CRC value is returned in DE.\r
+; Registers BC and HL are preserved.\r
+;\r
+; called by: spack, rpack\r
+\r
+crcclc: push h ;Save HL\r
+ push b ;And BC\r
+ lxi d,0 ;Initial CRC value is 0\r
+\r
+crccl0: mov a,m ;Get a character\r
+ ora a ;Check if zero\r
+ jz crccl1 ;If so, all done\r
+ push h ;Save the pointer\r
+ xra e ;Add in with previous value\r
+ mov e,a ;Get a copy\r
+ ani 0FH ;Get last 4 bits of combined value\r
+ mov c,a ;Get into C\r
+ mvi b,0 ;And make high order zero\r
+ lxi h,crctb2 ;Point at low order table\r
+ dad b ;Point to correct entry\r
+ dad b ; . . .\r
+ push h ;Save the address\r
+ mov a,e ;Get combined value back again\r
+ rrc ;Shift over to make index\r
+ rrc ; . . .\r
+ rrc ; . . .\r
+ ani 1EH ;Keep only 4 bits\r
+ mov c,a ;Set up to offset table\r
+ lxi h,crctab ;Point at high order table\r
+ dad b ;Correct entry\r
+ mov a,m ;Get low order portion of entry\r
+ xra d ;XOR with previous high order half\r
+ inx h ;Point to high order byte\r
+ mov d,m ;Get into D\r
+ pop h ;Get back pointer to other table entry\r
+ xra m ;Include with new high order half\r
+ mov e,a ;Copy new low order portion\r
+ inx h ;Point to other portion\r
+ mov a,m ;Get the other portion of the table entry\r
+ xra d ;Include with other high order portion\r
+ mov d,a ;Move back into D\r
+\r
+ pop h ;And H\r
+ inx h ;Point to next character\r
+ jmp crccl0 ;Go get next character\r
+\r
+crccl1: pop b ;Restore B\r
+ pop h ;And HL\r
+\r
+ ret ;And return, DE=CRC-CCITT\r
+\r
+CRCTAB: DW 00000H\r
+ DW 01081H\r
+ DW 02102H\r
+ DW 03183H\r
+ DW 04204H\r
+ DW 05285H\r
+ DW 06306H\r
+ DW 07387H\r
+ DW 08408H\r
+ DW 09489H\r
+ DW 0A50AH\r
+ DW 0B58BH\r
+ DW 0C60CH\r
+ DW 0D68DH\r
+ DW 0E70EH\r
+ DW 0F78FH\r
+\r
+CRCTB2: DW 00000H\r
+ DW 01189H\r
+ DW 02312H\r
+ DW 0329BH\r
+ DW 04624H\r
+ DW 057ADH\r
+ DW 06536H\r
+ DW 074BFH\r
+ DW 08C48H\r
+ DW 09DC1H\r
+ DW 0AF5AH\r
+ DW 0BED3H\r
+ DW 0CA6CH\r
+ DW 0DBE5H\r
+ DW 0E97EH\r
+ DW 0F8F7H\r
+;\f\r
+; This is where we go if we get an error during a protocol communication.\r
+; error prints the error packet on line 6 or so, and aborts the\r
+; transfer.\r
+; called by: rinit, rfile, rdata, sinit, sfile, sdata, seof, seot\r
+; error1 print CRLF followed by the error packet.\r
+; called by: finish, logout\r
+; error2 just prints the error packet.\r
+; error3 positions cursor and prints error message specified in DE.\r
+; called by: rinit, rfile, rdata, sinit, sfile, sdata, seof,\r
+; seot, parwrn, gofil, outbuf\r
+\r
+error: lda quietd ; a quiet display?\r
+ ana a\r
+ jnz error0 ; so dont say a thing\r
+ lda remtxt ;[MF]Doing a remote command?\r
+ ora a ;[MF]...\r
+ jnz error0 ;[MF]Yes, don't position cursor\r
+ call screrr ;Position the cursor.\r
+error0: mvi a,'A' ;Set the state to abort.\r
+ sta state\r
+ jmp error2\r
+\r
+error1: lxi d,crlf ;Print a CRLF.\r
+ lda quietd ; a quiet display?\r
+ ana a\r
+ jnz error2 ; so dont say a thing\r
+ call prtstr\r
+error2: lda argblk+1 ;Get the length of the data.\r
+ mov c,a\r
+ mvi b,0 ;Put it into BC\r
+ lxi h,data ;Get the address of the data.\r
+ dad b ;Get to the end of the string.\r
+ mvi m,'$' ;Put a dollar sign at the end.\r
+ lxi d,data ;Print error message\r
+ lda remtxt ;[MF]Doing a remote command?\r
+ ora a ;[MF]...\r
+ jnz errr2a ;[MF]Yes, print message, quiet or not!\r
+ lda quietd ; a quiet display?\r
+ ana a\r
+ rnz ; so dont say a thing\r
+errr2a: call prtstr\r
+ ret\r
+\r
+error3: lda quietd ; a quiet display?\r
+ ana a\r
+ rnz ; so dont say a thing\r
+ lda remtxt ;[MF]Doing a remote command?\r
+ ora a ;[MF]...\r
+ jnz err3a ;[MF]Yes, don't position cursor\r
+ push d ;Save the pointer to the message.\r
+ call screrr ;Position the cursor.\r
+ pop d ;Get the pointer back.\r
+err3a: call prtstr ;Print error message\r
+ ret\r
+;\f\r
+; Set up for file transfer.\r
+; called by read, send.\r
+\r
+init: lxi d,version ; point at Kermit's version string\r
+ lda quietd ; a quiet display?\r
+ ana a\r
+ jnz init1 ; so dont say a thing\r
+ call sysscr ; fix up screen\r
+init1: call selmdm ; select modem\r
+ call flsmdm ; purge any pending data\r
+ call selcon ; select console again.\r
+ ret\r
+\r
+; Set state to ABORT\r
+; called by: rinit, rfile, rdata, sinit, sfile, sdata, seof, seot,\r
+; nak, ackp\r
+\r
+abort: mvi a,'A' ;Otherwise abort.\r
+ sta state\r
+ ret\r
+\r
+; nak - send NAK packet\r
+; here from: rinit, rfile, rdata\r
+; nak0 - update retry count and send NAK packet\r
+; here from: rinit, rfile, rdata, tryagn\r
+\r
+nak0: call updrtr ;Update number of retries.\r
+nak: lda pktnum ;Get the packet number we're waiting for.\r
+ sta argblk\r
+ xra a ;No data.\r
+ sta argblk+1\r
+ mvi a,'N' ;NAK that packet.\r
+ call spack\r
+ jmp abort ; Give up.\r
+ ret ;Go around again.\r
+\r
+; increment and display retry count\r
+; called by: rfile, sinit, sfile, sdata, seof, seot,\r
+; nak, rpack, inchr, tryagn\r
+\r
+updrtr: lhld numrtr\r
+ inx h ;Increment the number of retries\r
+ shld numrtr\r
+ lda remtxt ;[MF]Doing a remote server command?\r
+ ora a ;[MF]...\r
+ rnz ;[MF]Yes, keep mum\r
+ lda quietd ; a quiet display?\r
+ ana a\r
+ rnz ; so dont say a thing\r
+ call scrnrt ;Position cursor\r
+ lhld numrtr ;[MF]\r
+call nout ;Write the number of retries.\r
+ ret\r
+\r
+; [jd] this routine prints parity warnings. All registers are\r
+; saved except for a.\r
+; called by: sdata\r
+\r
+parwrn: push b\r
+ push d\r
+ push h\r
+ lxi d,inms25\r
+ call error3\r
+ pop h\r
+ pop d\r
+ pop b\r
+ ret\r
+;[jd] end of addition\r
+\r
+; print message in status field. address of message is in DE.\r
+; called by: read, send\r
+\r
+finmes: lda quietd ; a quiet display?\r
+ ana a\r
+ jz finme0 ; so do usual stuff\r
+ push d ;[MF]Save pointer to completion message\r
+ call prcrlf ; best do a new line\r
+ pop d ;[MF]Restore completion message pointer\r
+ call prtstr ; and send message\r
+ mvi e,space ; send a space or two\r
+ mvi c,dconio\r
+ push b\r
+ push d\r
+ call bdos\r
+ pop d\r
+ pop b\r
+ call bdos\r
+ ret ; and exit back\r
+;\r
+;else for screaming screens...\r
+\r
+finme0: push d ;Save message.\r
+ call scrst ;Position cursor\r
+ pop d ;Print the termination message\r
+ call prtstr\r
+ ret ; may not want this **************\r
+\r
+ mvi c,4 ;[2] copy across user no and drive\r
+ lxi h,kerm1 ;[2] as we have the text already\r
+finme1: mov e,m\r
+ push h ;[2] conout probably destroys these\r
+ push b\r
+ call conout\r
+ pop b\r
+ pop h\r
+ inx h ;[2] next character\r
+ dcr c ;[2] ah, but have we done?\r
+ jnz finme1 ;[2] nope\r
+ lxi d,spac15 ;[2] send 15 spaces (clears previous filename)\r
+ call prtstr ;[2]\r
+ call scrend ;Position cursor for prompt\r
+ ret\r
+\r
+; Compare expected packet number against received packet number.\r
+; return with flags set (Z = packet number valid)\r
+; called by: rfile, rdata, sinit, sfile, sdata, seof, seot\r
+\r
+compp: lda pktnum ;Get the packet Nr.\r
+ mov b,a\r
+ lda argblk\r
+ cmp b\r
+ ret\r
+\r
+; Increment the packet number, modulo 64.\r
+; called by: rinit, rfile, rdata, sinit, sfile, sdata, seof, seot\r
+\r
+countp: inr a ;Increment packet Nr.\r
+ ani 3FH ;Turn off the two high order bits\r
+ sta pktnum ;Save modulo 64 of number\r
+ lhld numpkt\r
+ inx h ;Increment Nr. of packets\r
+ shld numpkt\r
+ ret\r
+\r
+; Send an ACK-packet\r
+; called by: rfile, rdata, tryagn\r
+\r
+ackp: xra a\r
+ sta numtry ;Reset number of retries\r
+ sta argblk+1 ;No data. (The packet number is in argblk)\r
+ mvi a,'Y' ;Acknowledge packet\r
+ call spack ;Send packet\r
+ jmp abort\r
+ ret\r
+\r
+; ?\r
+; called with A/ current retry count\r
+; called by: rfile, rdata\r
+\r
+tryagn: inr a ;Increment it.\r
+ sta oldtry ;Save the updated number of tries.\r
+ lda pktnum ;Get the present packet number.\r
+ dcr a ;Decrement\r
+ ani 3FH ; modulo 64\r
+ mov b,a\r
+ lda argblk ;Get the packet's number\r
+ cmp b ;Is the packet's number one less than now?\r
+ jnz nak0 ;No, NAK it and try again.\r
+ call updrtr ;Update the number of retries.\r
+ call ackp\r
+ ret\r
+\r
+; Output a null-terminated string to the console. We assume that the\r
+; console has been selected. Called with HL = address of string.\r
+; called by: spack, inpkt\r
+\r
+dmptxt: mov a,m ; get character from string\r
+ ora a\r
+ rz ; done if null\r
+ push h ; save string address\r
+ mov e,a ; move character to E for outcon\r
+ call outcon ; output character to console\r
+ pop h ; restore string address\r
+ inx h ; point past printed character\r
+ jmp dmptxt ; go output rest of string\r
+\r
+\r
+; Output a null-terminated string to the PRINTER We assume that the\r
+; console has been selected. Called with HL = address of string.\r
+; called by: spack, inpkt\r
+\r
+printm: mov a,m ; get character from string\r
+ ora a\r
+ rz ; done if null\r
+ push h ; save string address\r
+ mov e,a ; move character to E for outcon\r
+ call outprn ; output character to printer\r
+ pop h ; restore string address\r
+ inx h ; point past printed character\r
+ jmp printm ; go output rest of string\r
+\r
+\r
+;\f\r
+; test if character in A is the start of header character. We get\r
+; the start of packet character from sohchr, which can be SET\r
+tstsoh: push b ; save these registers for a bit\r
+ mov c,a ; we have to test if this is the character\r
+ lda sohchr\r
+ cmp c ; if zero, then it is\r
+ mov a,c ; restore accumulator but not flags\r
+ pop b\r
+ ret ; return with flags set\r
+;\r
+\r
+\r
+; Little code to allow some expansion of code without changing\r
+; every futher address, only up to the end of this file.\r
+; TO BE REMOVED FRO RELEASE!\r
+\r
+; org ($+100h) AND 0FF00H\r
+\r
+\r
+IF lasm\r
+ LINK CPSREM\r
+ENDIF;lasm\r
projects / kermit-80.git / blobdiff