[z180-stamp-cpm3.git] / cbios / sdio.180

	TITLE 'sd disk handler'\r
\r
;    CP/M-80 Version 3     --  Modular BIOS\r
\r
\r
    ; Disk drive dispatching tables for linked BIOS\r
\r
	public sd0,sd1,sd2,sd3\r
	public sd4,sd5,sd6,sd7\r
\r
    ; Variables containing parameters passed by BDOS\r
\r
	extrn @adrv,@rdrv\r
	extrn @trk,@sect,@cnt\r
	extrn @dma,@dbnk\r
\r
    ; System Control Block variables\r
\r
	extrn @ermde		; BDOS error mode\r
\r
    ; Utility routines in standard BIOS\r
\r
	extrn ?wboot		; warm boot vector\r
	extrn ?pmsg,pr.inln	; print message @<HL>, print inline message\r
	extrn pr.crlf		; print <cr><lf>\r
	extrn ?pderr		; print BIOS disk error header\r
	extrn ?conin,?cono	; con in and out\r
	extrn ?const		; get console status\r
\r
	extrn bnk2phy		;\r
	extrn msg.sm		;\r
	extrn msg.recv		;\r
	extrn add_hla\r
\r
\r
    ; Port Address Equates\r
\r
	include config.inc\r
	include z180reg.inc\r
\r
    ; CP/M 3 Disk definition macros\r
\r
	include cpm3slr.lib\r
\r
    ; Z180 macro library instruction definitions (ignored by slr180)\r
\r
	include z180.lib\r
\r
    ; common control characters\r
\r
cr	equ	13\r
lf	equ	10\r
bell	equ	7\r
\r
\r
	dseg\r
\r
    ; Extended Disk Parameter Headers (XPDHs)\r
\r
	dw	sd$write\r
	dw	sd$read\r
	dw	sd$login\r
	dw	sd$init0\r
	db	0,0		; relative drive zero\r
sd0:	dph 0,dpbsimhd512\r
\r
	dw	sd$write\r
	dw	sd$read\r
	dw	sd$login\r
	dw	sd$init1\r
	db	1,0		; relative drive one\r
sd1:	dph 0,dpbsimhd512\r
\r
	dw	sd$write\r
	dw	sd$read\r
	dw	sd$login\r
	dw	sd$init2\r
	db	2,0		; relative drive zero\r
sd2:	dph 0,dpbsimhd512\r
\r
	dw	sd$write\r
	dw	sd$read\r
	dw	sd$login\r
	dw	sd$init3\r
	db	3,0		; relative drive one\r
sd3:	dph 0,dpbsimhd512\r
\r
\r
	dw	sd$write\r
	dw	sd$read\r
	dw	sd$login\r
	dw	sd$init4\r
	db	4,0		; relative drive zero\r
sd4:	dph 0,dpbsimhd512\r
\r
	dw	sd$write\r
	dw	sd$read\r
	dw	sd$login\r
	dw	sd$init5\r
	db	5,0		; relative drive one\r
sd5:	dph 0,dpbsimhd512\r
\r
	dw	sd$write\r
	dw	sd$read\r
	dw	sd$login\r
	dw	sd$init6\r
	db	6,0		; relative drive zero\r
sd6:	dph 0,dpbsimhd512\r
\r
	dw	sd$write\r
	dw	sd$read\r
	dw	sd$login\r
	dw	sd$init7\r
	db	7,0		; relative drive one\r
sd7:	dph 0,dpbsimhd512\r
\r
\r
	cseg			; DPB must be resident\r
\r
dpbsimhd512:\r
	dpb 512,8,2048,4096,1024,6\r
\r
\r
	dseg			; rest is banked\r
\r
; Disk I/O routines for standardized BIOS interface\r
\r
; Initialization entry point.\r
; called for first time initialization.\r
\r
sd$init0:\r
	ret\r
\r
sd$init1:\r
sd$init2:\r
sd$init3:\r
sd$init4:\r
sd$init5:\r
sd$init6:\r
sd$init7:\r
	ret	; all initialization done by drive 0\r
\r
\r
; This entry is called when a logical drive is about to\r
; be logged into for the purpose of density determination.\r
; It may adjust the parameters contained in the disk\r
; parameter header pointed at by <DE>\r
\r
sd$login:\r
	xor	a\r
	ld	(residual),a\r
	ld	hl,send_msg+1\r
	ld	(hl),0		;login function\r
	inc	hl\r
	ld	bc,(@adrv)\r
	ld	(hl),c		;@adrv\r
	inc	hl\r
	ld	(hl),b		;@rdrv\r
	inc	hl\r
\r
	ex	de,hl		;xdph to hl\r
	xor	a		;bank 0\r
	call	bnk2phy		;phys. linear address\r
	ex	de,hl\r
	ld	(hl),e\r
	inc	hl\r
	ld	(hl),d\r
	inc	hl\r
	ld	(hl),a\r
\r
	ld	hl,send_msg\r
	ld	b,send_msg_login_len\r
	call	msg.sm\r
\r
	ld	hl,recv_msg\r
	ld	b,recv_msg_len	; max receive message len\r
	call	msg.recv\r
\r
;	ld	a,(recv_msg_rc)\r
;	or	a\r
	ret			;\r
\r
\r
\r
; disk READ and WRITE entry points.\r
; these entries are called with the following arguments:\r
;\r
;     absolute drive number in @adrv (8 bits)	+0\r
;     relative drive number in @rdrv (8 bits)	+1\r
;     disk track address    in @trk (16 bits)	+2\r
;     disk sector address   in @sect(16 bits)	+4\r
;     multi sector count    in @cnt  (8 bits)	+6\r
;     disk transfer address in @dma (16 bits)	+7\r
;     disk transfer bank    in @dbnk (8 bits)	+9\r
;     pointer to XDPH 	    in <DE>\r
;\r
;     they transfer the appropriate data, perform retries\r
;     if necessary, then return an error code in <A>\r
\r
sd$read:\r
	ld	de,read$msg	; point at " Read "\r
	ld	c,1\r
	jr	rw$common\r
sd$write:\r
	ld	de,write$msg	; point at " Write "\r
	ld	c,2\r
rw$common:\r
\r
	ld	hl,residual	; remainng sectors from last multi io?\r
	ld	a,(hl)\r
	sub	a,1\r
	jr	c,rwc_new_sectors\r
\r
	ld	(hl),a\r
	xor	a\r
	ret\r
\r
rwc_new_sectors:\r
	ld	b,1		; assume 1 sector to transfer\r
	ld	a,(@cnt)\r
	or	a\r
	jr	z,rwc_doit\r
\r
	ld	b,a		; number of sectors to transfer\r
	dec	a		; save remaining\r
	ld	(hl),a\r
	xor	a		; reset multi sector count\r
	ld	(@cnt),a\r
\r
; compute pysical transfer address\r
;     prepare message\r
;     and send it to AVR.\r
\r
rwc_doit:\r
	ld	hl,send_msg+1\r
	ld	(hl),c\r
	inc	hl\r
	ld	a,b\r
	ex	de,hl\r
	ld	(operation$name),hl ; save message for errors\r
	ld	hl,@adrv	;address of arguments\r
	ld	bc,6\r
	ldir\r
	ld	(de),a		;number of sectors\r
	inc	de\r
	push	de\r
	ld	e,(hl)		;dma address\r
	inc	hl\r
	ld	d,(hl)\r
	inc	hl\r
	ld	a,(hl)		;bank\r
	ex	de,hl\r
	call	bnk2phy		;phys. linear address\r
	ex	de,hl\r
	pop	hl\r
	ld	(hl),e\r
	inc	hl\r
	ld	(hl),d\r
	inc	hl\r
	ld	(hl),a\r
\r
retry:\r
\r
	ld	hl,send_msg\r
	ld	b,send_msg_rw_len\r
	call	msg.sm\r
\r
	ld	hl,recv_msg\r
	ld	b,recv_msg_len	; max receive message len\r
	call	msg.recv\r
	ld	a,(recv_msg_rc)\r
	or	a\r
	ret	z		; check status and return to BDOS if no error\r
\r
; suppress error message if BDOS is returning errors to application...\r
\r
	ld	a,(@ermde)\r
	cp	0ffh\r
	jr	z,hard$error\r
\r
	; Had permanent error, print message like:\r
	; BIOS Err on d: T-nn, S-mm, <operation> <type>, Retry ?\r
\r
	call	?pderr		; print message header\r
\r
	ld	hl,(operation$name)\r
	call	?pmsg		; last function (read or write)\r
\r
	ld	a,(recv_msg_rc)\r
	and	a,07fh\r
	jr	z,fatfs_err\r
\r
	ld	hl,drvmsg0	; point at first driver error message\r
	ld	c,drvmsg_count\r
	call	pdecoded\r
\r
fatfs_err:\r
	ld	a,(recv_msg_rc)\r
	tst	080h\r
	jr	z,prompt	; no fatfs error\r
\r
	call	pr.inln\r
	db	'FatFs: ',0\r
\r
	ld	hl,fr$msg0	; point at first FatFs message\r
	ld	c,fr$msg$count\r
	ld	a,(recv_msg_rc+1)\r
	call	pdecoded\r
\r
prompt:\r
	call	pr.inln\r
	db	' Retry (Y/N) ? ',0\r
\r
	call	u$conin$echo	; get operator response\r
	cp	'Y'\r
	jr	z,retry		; Yes, then retry 10 more times\r
\r
hard$error:\r
				; otherwise,\r
	xor	a\r
	ld	(residual),a\r
\r
	ld	a,1		; return hard error to BDOS\r
	ret\r
\r
cancel:				; here to abort job\r
	jp	?wboot		; leap directly to warmstart vector\r
\r
\r
\r
; Print message to error code in A\r
;\r
\r
pdecoded:\r
	push	bc\r
	push	de\r
	push	hl		; put pointer to first message on stack\r
	cp	c\r
	jr	c,pdc_1\r
	xor	a\r
pdc_1:\r
	ld	bc,0\r
	ld	e,a		; save message number\r
	xor	a\r
	inc	e\r
pdc_nxt_str:\r
	dec	e\r
	ex	(sp),hl\r
	jr	z,pdc_found\r
	ex	(sp),hl\r
	cpir\r
	jr	z,pdc_nxt_str\r
				; not found (should not happen)\r
pdc_found:\r
	pop	hl\r
	call	?pmsg\r
	pop	de\r
	pop	bc\r
	ret\r
\r
\r
; get console input, echo it, and shift to upper case\r
\r
u$conin$echo:\r
\r
	call	?const\r
	or	a\r
	jr	z,u$c1		; see if any char already struck\r
	call	?conin\r
	jr	u$conin$echo	; yes, eat it and try again\r
u$c1:\r
	call	?conin\r
	push	af\r
	ld	c,a\r
	cp	' '-1\r
	call	nc,?cono\r
	pop	af\r
	cp	'a'\r
	ret	c\r
	sub	'a'-'A'		; make upper case\r
	ret\r
\r
\r
residual:\r
	db	0\r
\r
send_msg:\r
	db	2	; disk command\r
	ds	1	; subcommand (login/read/write)\r
	ds	1	; @adrv\r
	ds	1	; @rdrv\r
			; -read/write-		-login-\r
	ds	2	; @trk 			xdph address\r
	ds	2	; @sect			  (3 byte)\r
	ds	1	; @cnt\r
	ds	3	; transfer addr\r
send_msg_rw_len equ	$ - send_msg\r
send_msg_login_len equ	7\r
\r
\r
recv_msg:\r
	ds	1	; len\r
	ds	1	; command\r
	ds	1	; subcommand\r
recv_msg_rc:\r
	ds	1	; result code\r
	ds	4	; room for additional parameter\r
recv_msg_len equ $ - recv_msg\r
\r
\r
    ; error message components\r
\r
operation$name:\r
	dw	read$msg\r
read$msg:\r
	db	', Read, ',0\r
write$msg:\r
	db	', Write, ',0\r
\r
drvmsg0:	db	'Unknown Error, ',0\r
drvmsg1:	db	'Invalid Parameter(s), ',0\r
drvmsg2:	db	'Invalid Drive, ',0\r
drvmsg3:	db	'Bus Timeout, ',0\r
drvmsg_size	equ	$ - drvmsg0\r
drvmsg_count	equ	3\r
\r
\r
; table of pointers to error message strings\r
\r
fr$msg0:	db	'Unknown Error,',0\r
fr$msg1:	db	'DISK_ERR,',0\r
fr$msg2:	db	'INT_ERR,',0\r
fr$msg3:	db	'NOT_READY,',0\r
fr$msg4:	db	'NO_FILE,',0\r
fr$msg5:	db	'NO_PATH,',0\r
fr$msg6:	db	'INVALID_NAME,',0\r
fr$msg7:	db	'DENIED,',0\r
fr$msg8:	db	'EXIST,',0\r
fr$msg9:	db	'INVALID_OBJECT,',0\r
fr$msg10:	db	'WRITE_PROTECTED,',0\r
fr$msg11:	db	'INVALID_DRIVE,',0\r
fr$msg12:	db	'NOT_ENABLED,',0\r
fr$msg13:	db	'NO_FILE_SYSTEM,',0\r
fr$msg14:	db	'MKFS_ABORTED,',0\r
fr$msg15:	db	'TIMEOUT,',0\r
fr$msg16:	db	'LOCKED,',0\r
fr$msg17:	db	'NOT_ENOUGH_CORE,',0\r
fr$msg18:	db	'TOO_MANY_OPEN_FILES,',0\r
fr$msg19:	db	'FR_INVALID_PARAMETER,',0\r
fr$msg20:	db	'short read/write,',0\r
fr$msg$size	equ	$ - fr$msg0\r
fr$msg$count	equ	20\r
\r
	end\r
Commit	Line	Data
ea5293bb L	1	TITLE 'sd disk handler'\r
	2	\r
	3	; CP/M-80 Version 3 -- Modular BIOS\r
	4	\r
	5	\r
ea5293bb L	6	; Disk drive dispatching tables for linked BIOS\r
	7	\r
	8	public sd0,sd1,sd2,sd3\r
b625464d	9	public sd4,sd5,sd6,sd7\r
ea5293bb L	10	\r
	11	; Variables containing parameters passed by BDOS\r
	12	\r
	13	extrn @adrv,@rdrv\r
1d26b866 L	14	extrn @trk,@sect,@cnt\r
1d26b866 L	15	extrn @dma,@dbnk\r
ea5293bb L	16	\r
	17	; System Control Block variables\r
	18	\r
	19	extrn @ermde ; BDOS error mode\r
	20	\r
	21	; Utility routines in standard BIOS\r
	22	\r
	23	extrn ?wboot ; warm boot vector\r
d12d8b38 L	24	extrn ?pmsg,pr.inln ; print message @<HL>, print inline message\r
d12d8b38 L	25	extrn pr.crlf ; print <cr><lf>\r
ea5293bb L	26	extrn ?pderr ; print BIOS disk error header\r
	27	extrn ?conin,?cono ; con in and out\r
	28	extrn ?const ; get console status\r
	29	\r
	30	extrn bnk2phy ;\r
	31	extrn msg.sm ;\r
	32	extrn msg.recv ;\r
	33	extrn add_hla\r
	34	\r
	35	\r
	36	; Port Address Equates\r
	37	\r
	38	include config.inc\r
	39	include z180reg.inc\r
	40	\r
	41	; CP/M 3 Disk definition macros\r
	42	\r
	43	include cpm3slr.lib\r
	44	\r
	45	; Z180 macro library instruction definitions (ignored by slr180)\r
	46	\r
	47	include z180.lib\r
	48	\r
	49	; common control characters\r
	50	\r
	51	cr equ 13\r
	52	lf equ 10\r
	53	bell equ 7\r
	54	\r
	55	\r
50f3b8f0 L	56	dseg\r
50f3b8f0 L	57	\r
ea5293bb L	58	; Extended Disk Parameter Headers (XPDHs)\r
	59	\r
	60	dw sd$write\r
	61	dw sd$read\r
	62	dw sd$login\r
	63	dw sd$init0\r
	64	db 0,0 ; relative drive zero\r
	65	sd0: dph 0,dpbsimhd512\r
	66	\r
	67	dw sd$write\r
	68	dw sd$read\r
	69	dw sd$login\r
	70	dw sd$init1\r
	71	db 1,0 ; relative drive one\r
	72	sd1: dph 0,dpbsimhd512\r
	73	\r
	74	dw sd$write\r
	75	dw sd$read\r
	76	dw sd$login\r
d12d8b38	77	dw sd$init2\r
ea5293bb L	78	db 2,0 ; relative drive zero\r
	79	sd2: dph 0,dpbsimhd512\r
	80	\r
	81	dw sd$write\r
	82	dw sd$read\r
	83	dw sd$login\r
d12d8b38	84	dw sd$init3\r
ea5293bb L	85	db 3,0 ; relative drive one\r
	86	sd3: dph 0,dpbsimhd512\r
	87	\r
	88	\r
b625464d L	89	dw sd$write\r
	90	dw sd$read\r
	91	dw sd$login\r
	92	dw sd$init4\r
	93	db 4,0 ; relative drive zero\r
	94	sd4: dph 0,dpbsimhd512\r
	95	\r
	96	dw sd$write\r
	97	dw sd$read\r
	98	dw sd$login\r
	99	dw sd$init5\r
	100	db 5,0 ; relative drive one\r
	101	sd5: dph 0,dpbsimhd512\r
	102	\r
	103	dw sd$write\r
	104	dw sd$read\r
	105	dw sd$login\r
	106	dw sd$init6\r
	107	db 6,0 ; relative drive zero\r
	108	sd6: dph 0,dpbsimhd512\r
	109	\r
	110	dw sd$write\r
	111	dw sd$read\r
	112	dw sd$login\r
	113	dw sd$init7\r
	114	db 7,0 ; relative drive one\r
	115	sd7: dph 0,dpbsimhd512\r
	116	\r
	117	\r
ea5293bb L	118	cseg ; DPB must be resident\r
	119	\r
	120	dpbsimhd512:\r
	121	dpb 512,8,2048,4096,1024,6\r
	122	\r
	123	\r
	124	dseg ; rest is banked\r
	125	\r
	126	; Disk I/O routines for standardized BIOS interface\r
	127	\r
	128	; Initialization entry point.\r
	129	; called for first time initialization.\r
	130	\r
	131	sd$init0:\r
	132	ret\r
	133	\r
	134	sd$init1:\r
	135	sd$init2:\r
	136	sd$init3:\r
b625464d L	137	sd$init4:\r
	138	sd$init5:\r
	139	sd$init6:\r
	140	sd$init7:\r
ea5293bb L	141	ret ; all initialization done by drive 0\r
	142	\r
	143	\r
ea5293bb L	144	; This entry is called when a logical drive is about to\r
	145	; be logged into for the purpose of density determination.\r
	146	; It may adjust the parameters contained in the disk\r
	147	; parameter header pointed at by <DE>\r
	148	\r
	149	sd$login:\r
1d26b866 L	150	xor a\r
1d26b866 L	151	ld (residual),a\r
ea5293bb L	152	ld hl,send_msg+1\r
	153	ld (hl),0 ;login function\r
	154	inc hl\r
	155	ld bc,(@adrv)\r
	156	ld (hl),c ;@adrv\r
	157	inc hl\r
	158	ld (hl),b ;@rdrv\r
	159	inc hl\r
	160	\r
	161	ex de,hl ;xdph to hl\r
	162	xor a ;bank 0\r
	163	call bnk2phy ;phys. linear address\r
	164	ex de,hl\r
	165	ld (hl),e\r
	166	inc hl\r
	167	ld (hl),d\r
	168	inc hl\r
	169	ld (hl),a\r
	170	\r
	171	ld hl,send_msg\r
	172	ld b,send_msg_login_len\r
	173	call msg.sm\r
	174	\r
	175	ld hl,recv_msg\r
	176	ld b,recv_msg_len ; max receive message len\r
	177	call msg.recv\r
	178	\r
	179	; ld a,(recv_msg_rc)\r
	180	; or a\r
	181	ret ;\r
	182	\r
	183	\r
	184	\r
	185	; disk READ and WRITE entry points.\r
	186	; these entries are called with the following arguments:\r
	187	;\r
	188	; absolute drive number in @adrv (8 bits) +0\r
	189	; relative drive number in @rdrv (8 bits) +1\r
1d26b866 L	190	; disk track address in @trk (16 bits) +2\r
	191	; disk sector address in @sect(16 bits) +4\r
	192	; multi sector count in @cnt (8 bits) +6\r
ea5293bb L	193	; disk transfer address in @dma (16 bits) +7\r
	194	; disk transfer bank in @dbnk (8 bits) +9\r
	195	; pointer to XDPH in <DE>\r
	196	;\r
	197	; they transfer the appropriate data, perform retries\r
	198	; if necessary, then return an error code in <A>\r
	199	\r
	200	sd$read:\r
1d26b866 L	201	ld de,read$msg ; point at " Read "\r
1d26b866 L	202	ld c,1\r
ea5293bb	203	jr rw$common\r
ea5293bb	204	sd$write:\r
1d26b866 L	205	ld de,write$msg ; point at " Write "\r
	206	ld c,2\r
	207	rw$common:\r
1d26b866	208	\r
3735c546 L	209	ld hl,residual ; remainng sectors from last multi io?\r
	210	ld a,(hl)\r
	211	sub a,1\r
	212	jr c,rwc_new_sectors\r
	213	\r
	214	ld (hl),a\r
	215	xor a\r
	216	ret\r
1d26b866 L	217	\r
	218	rwc_new_sectors:\r
	219	ld b,1 ; assume 1 sector to transfer\r
3735c546 L	220	ld a,(@cnt)\r
	221	or a\r
	222	jr z,rwc_doit\r
	223	\r
	224	ld b,a ; number of sectors to transfer\r
	225	dec a ; save remaining\r
	226	ld (hl),a\r
	227	xor a ; reset multi sector count\r
	228	ld (@cnt),a\r
ea5293bb L	229	\r
	230	; compute pysical transfer address\r
	231	; prepare message\r
	232	; and send it to AVR.\r
	233	\r
1d26b866 L	234	rwc_doit:\r
	235	ld hl,send_msg+1\r
	236	ld (hl),c\r
	237	inc hl\r
	238	ld a,b\r
	239	ex de,hl\r
	240	ld (operation$name),hl ; save message for errors\r
ea5293bb	241	ld hl,@adrv ;address of arguments\r
1d26b866	242	ld bc,6\r
ea5293bb	243	ldir\r
b27f7b99	244	ld (de),a ;number of sectors\r
1d26b866	245	inc de\r
ea5293bb L	246	push de\r
	247	ld e,(hl) ;dma address\r
	248	inc hl\r
	249	ld d,(hl)\r
	250	inc hl\r
	251	ld a,(hl) ;bank\r
	252	ex de,hl\r
	253	call bnk2phy ;phys. linear address\r
	254	ex de,hl\r
	255	pop hl\r
	256	ld (hl),e\r
	257	inc hl\r
	258	ld (hl),d\r
	259	inc hl\r
	260	ld (hl),a\r
	261	\r
04134640	262	retry:\r
ea5293bb L	263	\r
	264	ld hl,send_msg\r
	265	ld b,send_msg_rw_len\r
	266	call msg.sm\r
	267	\r
	268	ld hl,recv_msg\r
	269	ld b,recv_msg_len ; max receive message len\r
	270	call msg.recv\r
	271	ld a,(recv_msg_rc)\r
	272	or a\r
	273	ret z ; check status and return to BDOS if no error\r
	274	\r
	275	; suppress error message if BDOS is returning errors to application...\r
	276	\r
	277	ld a,(@ermde)\r
	278	cp 0ffh\r
	279	jr z,hard$error\r
	280	\r
	281	; Had permanent error, print message like:\r
	282	; BIOS Err on d: T-nn, S-mm, <operation> <type>, Retry ?\r
	283	\r
	284	call ?pderr ; print message header\r
	285	\r
	286	ld hl,(operation$name)\r
	287	call ?pmsg ; last function (read or write)\r
	288	\r
	289	ld a,(recv_msg_rc)\r
04134640 L	290	and a,07fh\r
04134640 L	291	jr z,fatfs_err\r
ea5293bb	292	\r
04134640 L	293	ld hl,drvmsg0 ; point at first driver error message\r
	294	ld c,drvmsg_count\r
	295	call pdecoded\r
ea5293bb	296	\r
04134640	297	fatfs_err:\r
ea5293bb	298	ld a,(recv_msg_rc)\r
1d26b866	299	tst 080h\r
04134640	300	jr z,prompt ; no fatfs error\r
ea5293bb	301	\r
d12d8b38 L	302	call pr.inln\r
d12d8b38 L	303	db 'FatFs: ',0\r
ea5293bb	304	\r
04134640 L	305	ld hl,fr$msg0 ; point at first FatFs message\r
04134640 L	306	ld c,fr$msg$count\r
ea5293bb	307	ld a,(recv_msg_rc+1)\r
04134640	308	call pdecoded\r
ea5293bb	309	\r
04134640	310	prompt:\r
d12d8b38 L	311	call pr.inln\r
	312	db ' Retry (Y/N) ? ',0\r
	313	\r
ea5293bb	314	call u$conin$echo ; get operator response\r
04134640 L	315	cp 'Y'\r
	316	jr z,retry ; Yes, then retry 10 more times\r
	317	\r
ea5293bb L	318	hard$error:\r
ea5293bb L	319	; otherwise,\r
04134640 L	320	xor a\r
	321	ld (residual),a\r
	322	\r
	323	ld a,1 ; return hard error to BDOS\r
	324	ret\r
ea5293bb L	325	\r
	326	cancel: ; here to abort job\r
	327	jp ?wboot ; leap directly to warmstart vector\r
	328	\r
	329	\r
	330	\r
04134640 L	331	; Print message to error code in A\r
	332	;\r
	333	\r
	334	pdecoded:\r
	335	push bc\r
	336	push de\r
	337	push hl ; put pointer to first message on stack\r
	338	cp c\r
	339	jr c,pdc_1\r
	340	xor a\r
	341	pdc_1:\r
	342	ld bc,0\r
	343	ld e,a ; save message number\r
	344	xor a\r
	345	inc e\r
	346	pdc_nxt_str:\r
	347	dec e\r
	348	ex (sp),hl\r
	349	jr z,pdc_found\r
	350	ex (sp),hl\r
	351	cpir\r
	352	jr z,pdc_nxt_str\r
	353	; not found (should not happen)\r
	354	pdc_found:\r
	355	pop hl\r
	356	call ?pmsg\r
	357	pop de\r
	358	pop bc\r
	359	ret\r
	360	\r
	361	\r
	362	; get console input, echo it, and shift to upper case\r
	363	\r
ea5293bb	364	u$conin$echo:\r
04134640	365	\r
ea5293bb L	366	call ?const\r
ea5293bb L	367	or a\r
04134640	368	jr z,u$c1 ; see if any char already struck\r
ea5293bb	369	call ?conin\r
04134640	370	jr u$conin$echo ; yes, eat it and try again\r
ea5293bb L	371	u$c1:\r
	372	call ?conin\r
	373	push af\r
	374	ld c,a\r
04134640 L	375	cp ' '-1\r
04134640 L	376	call nc,?cono\r
ea5293bb L	377	pop af\r
	378	cp 'a'\r
	379	ret c\r
04134640	380	sub 'a'-'A' ; make upper case\r
ea5293bb L	381	ret\r
	382	\r
	383	\r
1d26b866 L	384	residual:\r
1d26b866 L	385	db 0\r
ea5293bb L	386	\r
	387	send_msg:\r
	388	db 2 ; disk command\r
	389	ds 1 ; subcommand (login/read/write)\r
	390	ds 1 ; @adrv\r
	391	ds 1 ; @rdrv\r
1d26b866 L	392	; -read/write- -login-\r
	393	ds 2 ; @trk xdph address\r
	394	ds 2 ; @sect (3 byte)\r
	395	ds 1 ; @cnt\r
ea5293bb L	396	ds 3 ; transfer addr\r
ea5293bb L	397	send_msg_rw_len equ $ - send_msg\r
1d26b866	398	send_msg_login_len equ 7\r
ea5293bb L	399	\r
	400	\r
	401	recv_msg:\r
	402	ds 1 ; len\r
	403	ds 1 ; command\r
	404	ds 1 ; subcommand\r
	405	recv_msg_rc:\r
	406	ds 1 ; result code\r
	407	ds 4 ; room for additional parameter\r
	408	recv_msg_len equ $ - recv_msg\r
	409	\r
	410	\r
	411	; error message components\r
	412	\r
	413	operation$name:\r
	414	dw read$msg\r
	415	read$msg:\r
04134640	416	db ', Read, ',0\r
ea5293bb	417	write$msg:\r
04134640 L	418	db ', Write, ',0\r
	419	\r
	420	drvmsg0: db 'Unknown Error, ',0\r
	421	drvmsg1: db 'Invalid Parameter(s), ',0\r
	422	drvmsg2: db 'Invalid Drive, ',0\r
	423	drvmsg3: db 'Bus Timeout, ',0\r
	424	drvmsg_size equ $ - drvmsg0\r
	425	drvmsg_count equ 3\r
	426	\r
04134640 L	427	\r
	428	; table of pointers to error message strings\r
	429	\r
	430	fr$msg0: db 'Unknown Error,',0\r
	431	fr$msg1: db 'DISK_ERR,',0\r
	432	fr$msg2: db 'INT_ERR,',0\r
	433	fr$msg3: db 'NOT_READY,',0\r
	434	fr$msg4: db 'NO_FILE,',0\r
	435	fr$msg5: db 'NO_PATH,',0\r
	436	fr$msg6: db 'INVALID_NAME,',0\r
	437	fr$msg7: db 'DENIED,',0\r
	438	fr$msg8: db 'EXIST,',0\r
	439	fr$msg9: db 'INVALID_OBJECT,',0\r
	440	fr$msg10: db 'WRITE_PROTECTED,',0\r
	441	fr$msg11: db 'INVALID_DRIVE,',0\r
	442	fr$msg12: db 'NOT_ENABLED,',0\r
	443	fr$msg13: db 'NO_FILE_SYSTEM,',0\r
	444	fr$msg14: db 'MKFS_ABORTED,',0\r
	445	fr$msg15: db 'TIMEOUT,',0\r
	446	fr$msg16: db 'LOCKED,',0\r
	447	fr$msg17: db 'NOT_ENOUGH_CORE,',0\r
	448	fr$msg18: db 'TOO_MANY_OPEN_FILES,',0\r
	449	fr$msg19: db 'FR_INVALID_PARAMETER,',0\r
	450	fr$msg20: db 'short read/write,',0\r
ea5293bb	451	fr$msg$size equ $ - fr$msg0\r
04134640	452	fr$msg$count equ 20\r
ea5293bb	453	\r
ea5293bb	454	end\r