cseg\r
.phase TPA\r
\r
- jp start\r
- ds 3\r
+ LD SP,ldr_end+(stack-ddtz_base)\r
+ LD DE,signon\r
+ LD C,BDOS_PSTR\r
+ CALL BDOS\r
+\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+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
+ 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
+signon:\r
+ db 'DDTZ/180'\r
+ db ' - Version '\r
+ maclib version.inc\r
+ defvers\r
+ db CR,LF,'$'\r
ldr_end:\r
ldr_size equ $ - TPA\r
-current_phase defl $\r
\r
.dephase\r
-current_cseg defl $\r
-\r
;-------------------------------------------------------------------------------\r
; DDT/Z core\r
;\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
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