; - 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
+ cseg\r
+ldr_start:\r
+ LD SP,stack\r
+\r
+; LD DE,signon\r
+; LD C,BDOS_PSTR\r
+; CALL BDOS\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
+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
+\r
;-------------------------------------------------------------------------------\r
; Relocation loader\r
;\r
-TPA equ 0100h\r
- cseg\r
- .phase TPA\r
+ LD HL,ddtz_end ;start of reloc bitmap\r
+ ld bc,0108h ;init bit counter\r
\r
- jp start\r
- ds 3\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
\r
-ldr_end:\r
-ldr_size equ $ - TPA\r
-current_phase defl $\r
+ push hl\r
+ PUSH BC\r
+ ld de,ldr_end\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
+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
- .dephase\r
-current_cseg defl $\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
STACK_SIZE equ 80 ;ddtz internal stack\r
CONBUF_SIZE equ 80 ;Size of console input buffer\r
-EXPR_BUF_SIZE equ 128 ;expressen buffer for conditional breakpoints\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 ddtz_bdos\r
+ jp 0\r
l0003h:\r
rst 30h\r
di_or_ei:\r
nop\r
ret\r
-ddtz_bdos:\r
- jp 0\r
-\r
-current_cseg defl $ - current_cseg\r
- .phase current_phase + current_cseg\r
-signon:\r
- db 'DDTZ/180'\r
- db ' - Version '\r
- maclib version.inc\r
- defvers\r
- db CR,LF,'$'\r
-msgz80:\r
- db 'Z80 or better required!',cr,lf,'$'\r
-\r
-current_phase defl $\r
- .dephase\r
-current_cseg defl $\r
- ds STACK_SIZE - (current_phase - signon)\r
\r
+ ds STACK_SIZE\r
\r
stack:\r
reg.l2: db 000h\r
conbuf:\r
db CONBUF_SIZE\r
\r
- ld sp,stack\r
- exx\r
- ld de,ddtz_base\r
- call cp_hl_de\r
- jr c,l0079h\r
- ex de,hl\r
-l0079h:\r
- ld de,TPA\r
-l007ch:\r
- dec hl\r
- ld (hl),000h\r
- ld a,h\r
- sub d\r
- ld b,a\r
- ld a,l\r
- sub e\r
- or b\r
- jr nz,l007ch\r
- ld a,i\r
- ld (reg.i),a\r
- ld a,0f3h\r
- jp po,l0093h\r
- ld a,0fbh\r
-l0093h:\r
- ld (reg.iff),a\r
- call di_or_ei\r
- ld hl,ddtz_base\r
- ld l,000h\r
- ld (reg_sp),hl\r
-\r
- ld hl,(1) ;wboot addr\r
- ld de,?const\r
- ld b,6\r
-vini_l:\r
- inc hl\r
- inc hl\r
- inc hl\r
- ex de,hl\r
- inc hl\r
- ld (hl),e\r
- inc hl\r
- ld (hl),d\r
- inc hl\r
- ex de,hl\r
- djnz vini_l\r
-\r
- jr mainloop\r
-\r
ds CONBUF_SIZE + 3 - ($ - conbuf)\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
-?list: jp 0 ; send list output character\r
-?auxo: jp 0 ; send auxiliary output character\r
-?auxi: jp 0 ; return auxiliary input character\r
\r
CMDTAB:\r
dw ERROR ;cmd_@ ;examine/substitute the displacement register @\r
\r
disas_pfx.ED:\r
inc iy\r
+ ld hl,l228bh\r
+ call lookup_op_arg\r
+ ld b,3\r
+ ret c\r
+ ld hl,b_1c40_start\r
+ call lookup_op_arg\r
+ ld b,4\r
+ ret c\r
+\r
ld hl,b_1bc9_start ;1 byte opcode, no arguments\r
call lookup_op\r
- ld b,2\r
- ret c\r
+ jr c,da_ed1\r
+\r
ld hl,b_1bf4_start\r
call lookup_op_arg\r
- jr nc,da_ed1\r
+ ret nc\r
\r
ld a,e\r
cp a_noarg\r
\r
da_ed0:\r
scf\r
- ld b,2\r
- ret\r
da_ed1:\r
- ld hl,l228bh\r
- call lookup_op_arg\r
- ld b,3\r
- ret c\r
- ld hl,b_1c40_start\r
- call lookup_op_arg\r
- ld b,4\r
+ ld b,2\r
ret\r
\r
;-------------------------------------------------------------------------------\r
\r
;-------------------------------------------------------------------------------\r
\r
+test_DDFD:\r
+ ld a,(hl)\r
+ and a\r
+ ret z\r
+ inc hl\r
+ cp (iy+000h)\r
+ jr nz,test_DDFD\r
+ scf\r
+ ret\r
+\r
lookup_op:\r
ld a,(hl)\r
inc hl\r
ld e,a_noarg\r
jr get_mnemonic\r
\r
-\r
-test_DDFD:\r
- ld a,(hl)\r
- and a\r
- ret z\r
- inc hl\r
- cp (iy+000h)\r
- jr nz,test_DDFD\r
- scf\r
- ret\r
-\r
lookup_op_arg:\r
- ld a,(iy+000h)\r
- and (hl)\r
- inc hl\r
- cp (hl)\r
- inc hl\r
- jr z,l1aa8h\r
- inc hl\r
- inc hl\r
- ld a,(hl)\r
- and a\r
- jr nz,lookup_op_arg\r
- ret\r
-\r
-l1aa8h:\r
- ld b,(hl)\r
- inc b\r
+ call lookup_branch_op\r
+ ret nc\r
+ ld a,e\r
+ ld e,d\r
+ cp a,0ffh\r
ret z ;carry clear\r
- dec b\r
- inc hl\r
- ld e,(hl)\r
+ ld b,a\r
+\r
get_mnemonic:\r
ld hl,t_MNEMONICS\r
bit 7,b\r
ret\r
\r
lookup_branch_op ;TODO\r
- ld a,(iy+000h)\r
- and (hl)\r
+ ld a,(hl)\r
+ and a\r
+ ret z\r
inc hl\r
+ and (iy+000h)\r
cp (hl)\r
inc hl\r
jr z,l1aa8_br\r
inc hl\r
inc hl\r
- ld a,(hl)\r
- and a\r
- jr nz,lookup_branch_op\r
- ret\r
+ jr lookup_branch_op\r
\r
l1aa8_br:\r
ld e,(hl)\r
db fi_ry,',' ;ld r[y],r[z]\r
a_r equ $-t_argf\r
db fi_rz,0 ;op r[z]\r
-a_ar equ $-t_argf\r
- db 'A,',fi_rz,0 ;op A,r[z]\r
+;a_ar equ $-t_argf\r
+; db 'A,',fi_rz,0 ;op A,r[z]\r
a_cc equ $-t_argf\r
db fi_ccy,0 ;op cc[y]\r
a_rst equ $-t_argf\r
opc macro x\r
\r
i_&x equ opc_index\r
-o_&x equ $-opc_tabstart\r
+;o_&x equ $-opc_tabstart\r
dc '&x'\r
opc_index defl opc_index+1\r
endm\r
\r
-opc1 macro x,y\r
-\r
-i_&x&y equ opc_index\r
-o_&x&y equ $-opc_tabstart\r
- db '&x'\r
-i_&y equ opc_index+1\r
-o_&y equ $-opc_tabstart\r
- dc '&y'\r
-opc_index defl opc_index+2\r
- endm\r
-\r
-\r
t_MNEMONICS:\r
-opc_tabstart defl $\r
+;opc_tabstart defl $\r
opc_index defl 0\r
; 1-byte other\r
opc NOP\r
opc RRD\r
opc RLD\r
\r
-;Block instructions\r
-t_mn_bli:\r
+; Block instructions\r
opc LDI\r
opc CPI\r
opc INI\r
opc INDR\r
opc OTDR\r
\r
-;Z180\r
+; Z180\r
opc IN0\r
opc OUT0\r
opc TST\r
dw l20ach\r
db 0ffh,0edh ;Prefix ED\r
dw l20b8h\r
-t_op_branch0:\r
+\r
db 0ffh,0cdh ;call mn\r
dw l2080h\r
db 0ffh,0c3h ;jp mn\r
endm\r
endm\r
\r
-expr_buf:\r
-current_cseg defl $ - current_cseg\r
- .phase current_phase + current_cseg\r
-\r
-start:\r
- LD SP,ldr_end+(stack-ddtz_base)\r
- LD DE,signon ;ldr_end+(expr_buf-ddtz_base)\r
- LD C,BDOS_PSTR\r
- CALL BDOS\r
-\r
- xor a\r
- dec a\r
- jp po,reloc\r
- ld de,msgz80\r
- LD C,BDOS_PSTR\r
- CALL BDOS\r
- jp 0\r
-\r
-reloc:\r
- LD HL,ldr_end+ddtz_size ;start of reloc bitmap\r
- ld bc,0108h ;init bit counter\r
-\r
- EXX\r
- LD HL,(BDOS+1)\r
- LD (ldr_end+(ddtz_bdos+1-ddtz_base)),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
-\r
- push hl\r
- PUSH BC\r
- ld de,ldr_end\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
-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
- cpi\r
- jp pe,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
-current_phase defl $\r
- .dephase\r
-current_cseg defl $\r
-\r
- ds EXPR_BUF_SIZE - ($ - expr_buf)\r
-expr_bufe:\r
-\r
;-------------------------------------------------------------------------------\r
\r
last_S:\r
dw TPA\r
\r
pbl_loop_adr:\r
- dw 0\r
+ dw 0addeh\r
\r
ddtz_size equ $-ddtz_base\r
ddtz_end:\r
projects / ddt180.git / blobdiff