; - Use Digital Research Link-80 to generate a .PRL file (op switch).\r
; - Cut the .PRL header (first 256 byte) end rename the result to DDTZ.COM.\r
\r
-TPA equ 0100h\r
+\r
+; Some greneral definitions\r
+\r
+BS equ 08h\r
+TAB equ 09h\r
+CR equ 0dh\r
+LF equ 0ah\r
+DEL equ 7fh\r
+CNTRX equ 'X'-'@'\r
+\r
+; CP/M memory layout\r
+\r
+BDOS equ 5\r
+TPA equ 0100h\r
+\r
+; ddtz specific definitions\r
+\r
+STACK_SIZE equ 80 ;ddtz internal stack\r
+CONBUF_SIZE equ 80 ;Size of console input buffer\r
+BP_CNT equ 12 ;Number of breakpoints\r
+BP_SIZE equ 4 ;Size of a breakpoint record\r
+\r
+bitmap_size equ (prog_size+7)/8\r
+\r
+;-------------------------------------------------------------------------------\r
\r
cseg\r
-ldr_start:\r
- LD SP,stack\r
+start::\r
+ddtz_base::\r
+ jr reloc\r
+ nop\r
+l0003h:\r
+ rst 30h ;rst used by ddtz\r
+di_or_ei: ;ints enabled/disabled while ddtz is running\r
+ nop\r
+ ret\r
\r
-; LD DE,signon\r
-; LD C,BDOS_PSTR\r
-; CALL BDOS\r
+?const: jp 0 ; return console input status\r
+?conin: jp 0 ; return console input character\r
+?cono: jp 0 ; send console output character\r
\r
- ld hl,(1) ;wboot addr\r
- ld de,?const\r
- ld b,3\r
-vini_l:\r
- inc hl\r
- inc hl\r
- inc hl\r
- ex de,hl\r
- inc hl\r
- ld (hl),e\r
- inc hl\r
- ld (hl),d\r
- inc hl\r
- ex de,hl\r
- djnz vini_l\r
+;-------------------------------------------------------------------------------\r
\r
signon:\r
- call pstr_inl\r
db 'DDTZ/180'\r
db ' - Version '\r
maclib version.inc\r
defvers\r
- dc CR,LF\r
-\r
-; ld sp,stack\r
-; exx\r
-; ld de,ddtz_base\r
-; call cp_hl_de\r
-; jr c,l0079h\r
-; ex de,hl\r
-;l0079h:\r
-; ld de,TPA\r
-;l007ch:\r
-; dec hl\r
-; ld (hl),000h\r
-; ld a,h\r
-; sub d\r
-; ld b,a\r
-; ld a,l\r
-; sub e\r
-; or b\r
-; jr nz,l007ch\r
-\r
- ld a,i\r
- ld (reg.i),a\r
- ld a,0f3h\r
- jp po,l0093h\r
- ld a,0fbh\r
-l0093h:\r
- ld (reg.iff),a\r
- call di_or_ei\r
- ld hl,ddtz_base\r
- ld l,000h\r
- ld (reg_sp),hl\r
-\r
- jp mainloop\r
+ dc ' ('\r
\r
;-------------------------------------------------------------------------------\r
-; Relocation loader\r
-;\r
- LD HL,ddtz_end ;start of reloc bitmap\r
- ld bc,0108h ;init bit counter\r
+; Determine current execution position\r
\r
- EXX\r
- LD HL,(BDOS+1)\r
- LD (ddtz_base+1),HL\r
- LD BC,ddtz_size-1\r
- LD D,B\r
- LD E,0FFH\r
- INC DE ;size rounded up to next page boundary\r
- INC BC ;ddtz_size\r
- OR A\r
- SBC HL,DE ;BDOS - size\r
- LD (BDOS+1),HL ;-> new BDOS entry\r
+reloc:\r
+ ld bc,(0)\r
+ ld de,(2)\r
+ ld sp,4\r
+ ld hl,0e9e1h ;opcpdes pop hl/jp (hl)\r
+ ld (0),hl\r
+ rst 0\r
+wearehere:\r
+ ld (0),bc\r
+ ld (2),de\r
+ ld de,-(wearehere-ddtz_base)\r
+ add hl,de ; hl:\r
\r
- push hl\r
- PUSH BC\r
- ld de,ldr_end\r
+ ld de,ddtz_base ; de:\r
+ or a\r
sbc hl,de\r
- EX DE,HL ;-> DE\r
- LD HL,ldr_size\r
- add hl,bc\r
- ld b,h\r
- ld c,l\r
- LD HL,TPA\r
+ ex de,hl ; de: reloc offset\r
+ ld hl,ddtz_end ;start of reloc bitmap\r
+ add hl,de\r
+ ld a,l\r
+ exx\r
+ ld l,a\r
+ exx\r
+ ld a,h\r
+ exx\r
+ ld h,a\r
+ ld bc,0108h ;init bit counter b (c==reload val)\r
+ exx\r
+ LD HL,ddtz_base\r
+ add hl,de ;--> ddtz_base\r
+ ld bc,prog_size\r
reloc_lp:\r
EXX\r
djnz reloc_nl\r
ld a,b\r
or c\r
jr nz,reloc_lp\r
- dec hl\r
-\r
- POP BC\r
- pop de\r
- EX DE,HL\r
- ADD HL,BC\r
- EX DE,HL\r
- DEC DE\r
- LDDR\r
- LD HL,conbuf+2-ddtz_base\r
- ADD HL,DE\r
- JP (HL)\r
-\r
-ldr_end:\r
-ldr_size equ $ - ldr_start\r
\r
;-------------------------------------------------------------------------------\r
-; DDT/Z core\r
-;\r
-\r
-; Some greneral definitions\r
-\r
-BS equ 08h\r
-TAB equ 09h\r
-CR equ 0dh\r
-LF equ 0ah\r
-DEL equ 7fh\r
-CNTRX equ 'X'-'@'\r
-\r
-; CP/M memory layout\r
-\r
-BDOS equ 5\r
-TPA equ 0100h\r
\r
-; BDOS function calls\r
\r
-BDOS_PSTR equ 9 ;Print String\r
-\r
-; ddtz specific definitions\r
-\r
-STACK_SIZE equ 80 ;ddtz internal stack\r
-CONBUF_SIZE equ 80 ;Size of console input buffer\r
-BP_CNT equ 12 ;Number of breakpoints\r
-BP_SIZE equ 4 ;Size of a breakpoint record\r
\r
;-------------------------------------------------------------------------------\r
\r
-ddtz_base:\r
- jp 0\r
-l0003h:\r
- rst 30h\r
-di_or_ei:\r
- nop\r
- ret\r
-\r
- ds STACK_SIZE\r
\r
-stack:\r
-reg.l2: db 000h\r
-reg.h2: db 000h\r
-reg.e2: db 000h\r
-reg.d2: db 000h\r
-reg.c2: db 000h\r
-reg.b2: db 000h\r
-reg.f2: db 000h\r
-reg.a2: db 000h\r
- db 000h\r
-reg.i: db 000h\r
-reg.iy: dw 0000h\r
-reg.ix: dw 0000h\r
-reg.f: db 000h\r
-reg.a: db 000h\r
-reg.c: db 000h\r
-reg.b: db 000h\r
-reg.e: db 000h\r
-reg.d: db 000h\r
-reg.l: db 000h\r
-reg.h: db 000h\r
-reg_sp: dw TPA\r
-reg.iff:\r
- db 0f3h\r
- db 0c3h\r
-reg.pc: dw TPA\r
+init::\r
+ LD SP,stack\r
\r
-cmd_rpt:dw mainloop\r
+ ld hl,(1) ;wboot addr\r
+ ld de,?const\r
+ ex de,hl\r
+ ld b,3\r
+vini_l:\r
+ inc de\r
+ inc de\r
+ inc de\r
+ inc hl\r
+ ld (hl),e\r
+ inc hl\r
+ ld (hl),d\r
+ inc hl\r
+ djnz vini_l\r
\r
-;-------------------------------------------------------------------------------\r
+ ld hl,signon\r
+ call pstr\r
+ ld hl,ddtz_base\r
+ call out_hl\r
+ call pstr_inl\r
+ dc ' - '\r
+ ld de,prog_size+bitmap_size-1\r
+ add hl,de\r
+ call out_hl\r
+ call pstr_inl\r
+ dc ')',CR,LF\r
\r
-conbuf:\r
- db CONBUF_SIZE\r
+ ld a,i\r
+ ld (reg.i),a\r
+ ld a,0f3h\r
+ jp po,l0093h\r
+ ld a,0fbh\r
+l0093h:\r
+ ld (reg.iff),a\r
+ call di_or_ei\r
+ ld hl,ddtz_base\r
+ ld l,000h\r
+ ld (reg_sp),hl\r
\r
- ds CONBUF_SIZE + 3 - ($ - conbuf)\r
+ jp mainloop\r
\r
;-------------------------------------------------------------------------------\r
\r
-?const: jp 0 ; return console input status\r
-?conin: jp 0 ; return console input character\r
-?cono: jp 0 ; send console output character\r
+;; Relocation loader\r
+;;\r
+;ldr_start::\r
+; LD HL,ddtz_end ;start of reloc bitmap\r
+; ld bc,0108h ;init bit counter\r
+;\r
+; EXX\r
+; LD HL,(BDOS+1)\r
+;; LD (ddtz_base+1),HL\r
+; LD BC,prog_size+bitmap_size-1\r
+; LD D,B\r
+; LD E,0FFH\r
+; INC DE ;size rounded up to next page boundary\r
+; INC BC ;ddtz_size\r
+; OR A\r
+; SBC HL,DE ;BDOS - size\r
+;; LD (BDOS+1),HL ;-> new BDOS entry\r
+;\r
+; push hl\r
+; PUSH BC\r
+; ld de,ddtz_base\r
+; sbc hl,de\r
+; EX DE,HL ;-> DE\r
+;; LD HL,ldr_size\r
+;; add hl,bc\r
+;; ld b,h\r
+;; ld c,l\r
+; ld bc,prog_size\r
+;; LD HL,TPA ;--> ddtz_base\r
+;reloc_lp:\r
+; EXX\r
+; djnz reloc_nl\r
+; ld b,c ;reload bit counter\r
+; LD e,(HL) ;get next 8 relocation bits\r
+; INC HL\r
+;reloc_nl:\r
+; sla e\r
+; EXX\r
+; JR NC,reloc_next\r
+; DEC HL\r
+; LD A,(HL)\r
+; ADD A,E\r
+; LD (HL),A\r
+; INC HL\r
+; LD A,(HL)\r
+; ADC A,D\r
+; LD (HL),A\r
+;reloc_next:\r
+; inc hl\r
+; dec bc\r
+; ld a,b\r
+; or c\r
+; jr nz,reloc_lp\r
+; dec hl\r
+;\r
+; POP BC\r
+; pop de\r
+; EX DE,HL\r
+; ADD HL,BC\r
+; EX DE,HL\r
+; DEC DE\r
+; LDDR\r
+; LD HL,conbuf+2-ddtz_base\r
+; ADD HL,DE\r
+; JP (HL)\r
+;\r
+;ldr_end::\r
+;ldr_size equ $ - ldr_start\r
+;\r
+;; Entry from relocator\r
+;;\r
+;; ld sp,stack\r
+;; exx\r
+;; ld de,ddtz_base\r
+;; call cp_hl_de\r
+;; jr c,l0079h\r
+;; ex de,hl\r
+;;l0079h:\r
+;; ld de,TPA\r
+;;l007ch:\r
+;; dec hl\r
+;; ld (hl),000h\r
+;; ld a,h\r
+;; sub d\r
+;; ld b,a\r
+;; ld a,l\r
+;; sub e\r
+;; or b\r
+;; jr nz,l007ch\r
+;\r
+;; jp\r
+;\r
+;-------------------------------------------------------------------------------\r
\r
-CMDTAB:\r
+CMDTAB::\r
dw ERROR ;cmd_@ ;examine/substitute the displacement register @\r
dw ERROR ;cmd_A ;Assemble\r
dw cmd_B ;Breakpoints display/set/clear\r
call pstr_inl\r
dc '?',CR,LF\r
;fall thru\r
-mainloop:\r
+mainloop::\r
ld sp,stack\r
ld hl,(reg.pc)\r
call bp_clr_temporary\r
call DELC1\r
dec hl\r
dec b\r
- inc c\r
ld a,(hl)\r
cp ' '\r
ret nc\r
get_line:\r
push hl ;\r
ld hl,conbuf ;\r
- ld c,(hl) ;\r
- inc hl ;\r
- ld b,000h ;\r
- inc hl ;\r
+ ld b,0 ;\r
inlnxtch:\r
- ld a,c ;\r
- or a ;\r
+ ld a,b ;\r
+ cp CONBUF_SIZE ;\r
jr z,inl_e ;\r
call incharw ;\r
cp CR ;\r
call outchar ;\r
inc hl ;\r
inc b ;\r
- dec c ;\r
jr inlnxtch ;\r
\r
inl_e:\r
ld (hl),0\r
- ld hl,conbuf+1 ;\r
- ld (hl),b ;\r
call CRLF ;\r
- inc hl\r
- ex de,hl\r
+ ld de,conbuf ;\r
pop hl ;\r
ret ;\r
\r
ld hl,TPA\r
cp 'L'\r
ret z\r
+ ld hl,(reg.pc)\r
+ cp '$'\r
+ ret z\r
cp '-'\r
jr z,fact_factneg\r
cp '~'\r
dec hl\r
dec de\r
lddr\r
- db 01h ;swallow ldir instruction (ld bc,...)\r
+ ret\r
cmdm_up:\r
ldir\r
ret\r
ret\r
\r
sub_0ee6h:\r
- ld hl,conbuf+1\r
+ ld hl,conbuf\r
call sub_0ef7h\r
- ld de,conbuf+1\r
+ ld de,conbuf\r
and a\r
sbc hl,de\r
ld b,l\r
pbl_loop_adr:\r
dw 0addeh\r
\r
+;-------------------------------------------------------------------------------\r
+\r
+conbuf::\r
+ ds CONBUF_SIZE+1\r
+\r
+;-------------------------------------------------------------------------------\r
+\r
+ rept (STACK_SIZE+3)/4\r
+ db 0deh,0adh,0beh,0efh\r
+ endm\r
+stack::\r
+reg.l2: db 000h\r
+reg.h2: db 000h\r
+reg.e2: db 000h\r
+reg.d2: db 000h\r
+reg.c2: db 000h\r
+reg.b2: db 000h\r
+reg.f2: db 000h\r
+reg.a2: db 000h\r
+ db 000h\r
+reg.i: db 000h\r
+reg.iy: dw 0000h\r
+reg.ix: dw 0000h\r
+reg.f: db 000h\r
+reg.a: db 000h\r
+reg.c: db 000h\r
+reg.b: db 000h\r
+reg.e: db 000h\r
+reg.d: db 000h\r
+reg.l: db 000h\r
+reg.h: db 000h\r
+reg_sp: dw TPA\r
+reg.iff:\r
+ db 0f3h\r
+ db 0c3h\r
+reg.pc: dw TPA\r
+\r
+cmd_rpt:dw mainloop\r
+\r
+;-------------------------------------------------------------------------------\r
+\r
ddtz_size equ $-ddtz_base\r
-ddtz_end:\r
+prog_size equ $-start\r
+ddtz_end::\r
\r
;-------------------------------------------------------------------------------\r
\r
projects / ddt180.git / commitdiff