\r
; ddtz specific definitions\r
\r
-STACK_SIZE equ 64 ;ddtz internal stack\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
var.$: dw 0000h\r
var.@: dw 0\r
\r
-error_func:dw l0146h\r
+error_func:dw p_msg_error\r
cmd_rpt:dw mainloop\r
\r
+;-------------------------------------------------------------------------------\r
+\r
conbuf:\r
db CONBUF_SIZE\r
\r
\r
ds CONBUF_SIZE + 3 - ($ - conbuf)\r
\r
+;-------------------------------------------------------------------------------\r
+\r
CMDTAB:\r
dw cmd_@ ;examine/substitute the displacement register @\r
dw cmd_A ;Assemble\r
\r
mainloop:\r
ld sp,stack\r
- ld hl,l0146h\r
+ ld hl,p_msg_error\r
ld (error_func),hl\r
ld hl,(reg.pc)\r
ld (var.$),hl\r
call CALL_HL\r
jr mainloop\r
\r
-l0146h:\r
+;-------------------------------------------------------------------------------\r
+\r
+p_msg_error:\r
call pstr_inl\r
dc '?'\r
;fall thru\r
out_hl_dec_neg:\r
push hl\r
call sub_01d9h\r
- defb 03eh\r
+ defb 03eh ;ld a,.. swallow push hl\r
out.hl.dec:\r
push hl\r
ld b,006h\r
pop af\r
\r
out_dgt:\r
- and 0fh\r
- cp 10\r
- jr c,l0229h\r
- add a,007h\r
-l0229h:\r
- add a,'0'\r
+ or 0f0h\r
+ daa\r
+ add a,0a0h\r
+ adc a,040h\r
jr outchar\r
\r
out.bin.w:\r
out.bin.b:\r
ld b,8\r
l01c9h:\r
- add a,a\r
- push af\r
- ld a,00\r
- adc a,a\r
- call out_dgt\r
+ rlca\r
+ push af\r
+ ld a,'0'/2\r
+ adc a,a\r
+ call outchar\r
pop af\r
djnz l01c9h\r
ld a,'"'\r
ld a,' '\r
jr outchar\r
\r
-p_char_lparen:\r
- ld a,'('\r
- jr outchar\r
-\r
outquote:\r
ld a,''''\r
outchar:\r
call outbl\r
jr p_goto_col\r
\r
-\r
+;-------------------------------------------------------------------------------\r
\r
inchar:\r
push ix\r
pop hl\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+\r
get_char_upper:\r
ld a,(de)\r
toupper:\r
or 020h\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+\r
skipbl0:\r
inc de\r
skipbl:\r
to_error:\r
jp ERROR\r
\r
+;-------------------------------------------------------------------------------\r
+\r
chk_stack:\r
push hl\r
push de\r
ld hl,0\r
add hl,sp\r
- ld de,stack-40\r
+ ld de,stack-(STACK_SIZE-28)\r
call cp_hl_de\r
pop de\r
pop hl\r
jr c,to_error\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+\r
add_hl_a:\r
add a,l\r
ld l,a\r
pop bc\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+\r
sym_getname:\r
push de\r
push hl\r
pop hl\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+\r
lookupch:\r
ld b,0\r
l02f5h:\r
ret\r
\r
sub_0303h:\r
- ld hl,b_0cc3_start\r
+ ld hl,t_reg_names\r
ld b,07fh\r
jr l030ch\r
\r
jr l0366h\r
\r
b_037c_start:\r
- defb 0e6h\r
+ defb 0e6h ;and a,.. clear carry\r
get_arg_range:\r
scf\r
ex af,af'\r
jr c,error0\r
ex af,af'\r
pop hl\r
- defb 03eh\r
+ defb 03eh ;ld a,.. swallow pop af\r
l038ch:\r
pop af\r
call get_range\r
scf\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+\r
expr:\r
call skipbl\r
expr1:\r
pop de\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+\r
do_op_eq:\r
jr z,l03edh\r
jr l03ech\r
dw doop_xor\r
dw 0\r
\r
+;-------------------------------------------------------------------------------\r
+\r
fact_factor:\r
call do_factor\r
ret nc\r
scf\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+\r
fact_reg.Y:\r
call get.decdigit\r
jr c,error1\r
inc b\r
push hl ;symtbl ptr\r
push de ;inpsym ptr\r
-fs_2:\r
+fs_nxtchar:\r
ld a,(de)\r
djnz fs_3\r
- cp a,':'\r
- jr nz,fs_21\r
- inc de\r
- pop hl\r
- jr fs_cont_1\r
-\r
-fs_21:\r
call test_sym_char\r
jr z,fs_cont\r
pop hl ;inpsym ptr (discard)\r
+ inc de\r
+ cp a,':'\r
+ jr z,fs_cont_1\r
+ dec de\r
+\r
pop hl ;symtbl ptr\r
inc hl\r
ld a,(hl) ;symval h\r
or a ;clear carry\r
pop bc\r
ret\r
+\r
fs_3:\r
inc de\r
dec hl\r
xor (hl)\r
and c\r
- jr z,fs_2\r
+ jr z,fs_nxtchar\r
fs_cont: ;start over\r
pop de ;inpsym ptr\r
fs_cont_1:\r
call sub_hl_a\r
jr fs_nxtsym\r
\r
+;-------------------------------------------------------------------------------\r
+\r
get.number:\r
call get.hexdigit\r
ret c\r
\r
sub_060ch:\r
call get_char_upper\r
- cp '['\r
+ cp 'Z'+1\r
jr l0614h\r
\r
get.hexdigit:\r
sub '0'\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+\r
p_cpustat0:\r
call assert_eol\r
p_cpustat:\r
jp outbl\r
\r
p_flags:\r
- ld b,a\r
- ld a,'S'\r
- call sub_06aah\r
- ld a,'Z'\r
- call sub_06aah\r
- rl b\r
- ld a,'H'\r
- call sub_06aah\r
- rl b\r
- ld a,'V'\r
- call sub_06aah\r
- ld a,'N'\r
- call sub_06aah\r
- ld a,'C'\r
-sub_06aah:\r
- rl b\r
- jp c,outchar\r
- jp outbl\r
+ push hl\r
+ ld hl,t_flag_names+7\r
+ ld c,a\r
+ ld b,8\r
+fl_loop:\r
+ ld a,' '\r
+ cp (hl)\r
+ ld a,c\r
+ rlca\r
+ ld c,a\r
+ jr z,fl_skip\r
+ ld a,(hl)\r
+ call c,outchar\r
+ call nc,outbl\r
+fl_skip:\r
+ dec hl\r
+ djnz fl_loop\r
+ pop hl\r
+ ret\r
\r
p_regs:\r
push de\r
db 000h\r
db 000h\r
\r
+;-------------------------------------------------------------------------------\r
+; > G [startaddr] [;breakp..]\r
+; Go [to start] [with temporary breakpoints]\r
+\r
cmd_G:\r
sub a\r
ld (trace_call_flag),a\r
call bp_enter\r
jp user_go\r
\r
+;-------------------------------------------------------------------------------\r
\r
bpl_init:\r
ld b,BP_CNT\r
call bpl_next\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+; > B\r
+; display all breakpoints\r
+; > B breakp [breakp..]\r
+; set breakpoints\r
+; > BX\r
+; clear all breakpoints\r
+; > BX address [address..]\r
+; clear breakpoints\r
+;\r
+; where breakp is:\r
+; [R] expression [I condition]\r
+\r
cmd_B:\r
call skipbl\r
jr z,bp_print\r
call bpl_next\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
; Add break points to list\r
; A = 1 Permanent (B command)\r
; A = 2 Temporary (G command)\r
ld hl,(expr_p2)\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+\r
bpddtz:\r
ld (reg.l),hl\r
pop hl\r
call bpl_next\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+\r
user_go:\r
sub a\r
ld (b_21e2_start),a\r
ld sp,(reg_sp)\r
jp reg.iff\r
\r
+;-------------------------------------------------------------------------------\r
+\r
bp_clr_condition:\r
ld a,(ix+000h)\r
and 003h\r
ld (iy+007h),d\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+; > Y\r
+; examine all Y variables\r
+; > Y[0..9]\r
+; examine (and substitute) an Y variable\r
+\r
cmd_Y:\r
call get.decdigit\r
jr c,l0bc3h\r
ld c,003h\r
jp l0c33h\r
\r
+;-------------------------------------------------------------------------------\r
+; > X\r
+; eXamine (display) all cpu registers and\r
+; the instruction at the current program counter\r
+; > X register\r
+; eXamine (and substitute) a register\r
+\r
+\r
cmd_X:\r
call skipbl\r
call sub_0caeh\r
cp 01dh\r
jp z,ERROR\r
ex de,hl\r
- ld hl,b_0cc3_start\r
+ ld hl,t_reg_names\r
call sel_dc_string\r
l0c12h:\r
call l0c33h\r
\r
sub_0c6ah:\r
push af\r
- ld b,000h\r
call outbl\r
call assert_eol\r
call get_line\r
pop af\r
ex af,af'\r
+ ld b,0\r
l0c76h:\r
call skipbl\r
ld a,b\r
ret z\r
push bc\r
- ld hl,b_0ca4_start\r
+ ld hl,t_flag_names\r
call lookupch\r
jp nc,ERROR\r
- ld a,b\r
- cp 008h\r
- jr z,l0c97h\r
- pop bc\r
- rlca\r
- rlca\r
- rlca\r
- add a,0c0h\r
- ld (l0c94h),a\r
- defb 0cbh\r
-l0c94h:\r
- defb 0c0h\r
+ inc b\r
+ xor a\r
+ scf\r
+nxt_f:\r
+ rla\r
+ djnz nxt_f\r
+ pop bc\r
+ jr c,l0c97h\r
+ or b\r
+ ld b,a\r
jr l0c76h\r
+\r
l0c97h:\r
ex af,af'\r
jp nc,ERROR\r
ex af,af'\r
ld a,0fbh\r
ld (reg.iff),a\r
- pop bc\r
jr l0c76h\r
\r
-b_0ca4_start:\r
+t_flag_names:\r
db 'CNV H ZSE',0\r
\r
sub_0caeh:\r
scf\r
ret\r
\r
-b_0cc3_start:\r
+t_reg_names:\r
DC 'BC'''\r
DC 'DE'''\r
DC 'HL'''\r
db 000h\r
dw reg.f\r
\r
+;-------------------------------------------------------------------------------\r
+; > S [startaddr]\r
+; Substitute memory\r
+\r
cmd_S:\r
ld hl,(last_S)\r
call get_lastarg_def\r
call sub_0ef8h\r
jr l0d60h\r
\r
+;-------------------------------------------------------------------------------\r
+; > @\r
+; examine (substitute) displacement register @\r
+\r
cmd_@:\r
call assert_eol\r
ld hl,msg_@\r
msg_@:\r
dc '@'\r
\r
+;-------------------------------------------------------------------------------\r
+; >>I [port]\r
+; Input a byte from port\r
+\r
cmd_I:\r
ld hl,cmd_I\r
ld (cmd_rpt),hl\r
call out.bin.b\r
jp crlf\r
\r
+;-------------------------------------------------------------------------------\r
+; >>O [byte] [port]\r
+; Output a byte to a port\r
+\r
cmd_O:\r
ld hl,cmd_O\r
ld (cmd_rpt),hl\r
out (c),a\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+; > Vstartaddr endaddr targetaddr\r
+; Verify (compare) two memory areas\r
+\r
cmd_V:\r
call sub_034eh\r
l0dedh:\r
jr nz,l0dedh\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+; > M[V] startaddr endaddr destaddr\r
+; Move memory [and verify]\r
+\r
cmd_M:\r
call get_char_upper\r
cp 'V'\r
jr z,l0dedh\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+; > H\r
+; display Highest load address of last filed loaded, Maximum "High"\r
+; off all loaded files, and Top address of available memory\r
+; > HS\r
+; display symbol list\r
+; > H expression\r
+; evaluate expression and display result in hex, decimal and other formats\r
+; > H expression expression\r
+; display sum und difference of expressions\r
+\r
cmd_H:\r
call get_char_upper\r
cp 'S'\r
jp crlf\r
\r
\r
+;-------------------------------------------------------------------------------\r
+; > Q[J] startaddr endaddr bytes\r
+; Query memory for a byte string [Justified]\r
+\r
cmd_Q:\r
call get_char_upper\r
sub 'J'\r
pop bc\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+; > Z startaddr endaddr bytes\r
+; Zap (fill) memory with a byte string\r
+\r
cmd_Z:\r
call get_arg_range\r
push bc\r
push de\r
push bc\r
l0edah:\r
- call get_char_upper\r
+ ld a,(de)\r
cp (hl)\r
jr nz,l0ee2h\r
inc de\r
ld (last_S),hl\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+; >>D [startaddr] [endaddr]\r
+; Display memory in hex and ASCII\r
+\r
cmd_D:\r
ld hl,cmd_D\r
ld (cmd_rpt),hl\r
ld a,'.'\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+; > Fcommandline\r
+; specifiy filenames and command line\r
+\r
cmd_F:\r
push de\r
ld hl,DMA_BUF+1\r
cp ','\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+\r
setup_fcb:\r
push de\r
ld hl,12\r
pop de\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+\r
file_open:\r
ld (cur_fcb),de\r
call setup_fcb\r
pop bc\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+; > R [displacement]\r
+; Read a binary or hex file and or symbol file [add displacement]\r
+\r
cmd_R:\r
ld hl,0\r
call get_lastarg_def\r
; return nc if valid alfanumeric char\r
\r
test_alphanum:\r
- cp 'z'+1\r
+ cp 'z'\r
+ ret z\r
ccf\r
ret c\r
cp 'a'\r
ret nc\r
- cp 'Z'+1\r
+ cp 'Z'\r
+ ret z\r
ccf\r
ret c\r
cp '?'\r
ret nc\r
test_numeral:\r
- cp '9'+1\r
+ cp '9'\r
+ ret z\r
ccf\r
ret c\r
cp '0'\r
cp TAB\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+\r
p_max_high0:\r
call assert_eol\r
p_max_high:\r
call out_hl\r
jp crlf\r
\r
+;-------------------------------------------------------------------------------\r
+; > Wstartaddr endaddr\r
+; Write a file to disk\r
+\r
cmd_W:\r
call get_arg_range\r
call assert_eol\r
ld c,BDOS_CLOSE\r
jp ddtz_bdos\r
\r
+;-------------------------------------------------------------------------------\r
+; > A [startaddr]\r
+; Assemble Zilog Z180 mnemonics\r
+\r
cmd_A:\r
ld hl,(last_A)\r
call get_lastarg_def\r
jr cmda_loop\r
\r
cmda_restart:\r
- call l0146h\r
+ call p_msg_error\r
ld sp,(l1262h)\r
jr cmda_loop\r
\r
CALL_HL:\r
jp (hl)\r
\r
+;-------------------------------------------------------------------------------\r
+\r
b_1289_start:\r
dw as.ADC_SBC ;ADC\r
db 088h ;\r
dw as.TSTIO ;TSTIO\r
db 074h ;\r
\r
+;-------------------------------------------------------------------------------\r
+\r
as.TST:\r
call arg.r_HL_A ;\r
jr nc,as.tst_0\r
inc de\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+; >>L [startaddr] [endaddr]\r
+; List disassembled code\r
+\r
cmd_L:\r
ld hl,cmd_L\r
ld (cmd_rpt),hl\r
jr c,l190fh\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+\r
cmdl_p_line:\r
push hl\r
call p_disas_line\r
call outbl\r
jp p_symbol\r
\r
+;-------------------------------------------------------------------------------\r
+\r
p_offset:\r
ld de,(var.@)\r
ld a,d\r
add hl,de\r
jp out_rparen\r
\r
+;-------------------------------------------------------------------------------\r
+\r
p_disas_instr:\r
sub a\r
ld (disas_argtype),a\r
scf\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+\r
disas_pfx.DDFD:\r
inc iy\r
ld hl,b_19ef_start\r
and a\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
; DD/FD 3 byte (ix+d)/(iy+d)\r
b_19ef_start:\r
db 034h\r
db 0f9h\r
db 0\r
\r
+;-------------------------------------------------------------------------------\r
+\r
disas_pfx.ED:\r
inc iy\r
ld hl,b_1bc9_start\r
ld b,4\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+\r
disas_pfx.CB:\r
push iy\r
inc iy\r
ld b,2\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+\r
disas_nopfx:\r
ld hl,b_1b54_start\r
call lookup_opc\r
ld b,3\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+\r
sub_1a72h:\r
ld a,(hl)\r
cp 0ffh\r
scf\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
; 1 byte opcodes (no parameters)\r
; Format: db opcode, t_MNEMONICS-index\r
b_1ab6_start:\r
dw p_arg_bitop\r
db 0\r
\r
+;-------------------------------------------------------------------------------\r
+\r
p_arg_r_r:\r
call p_arg_r\r
call p_char_comma\r
sub_1ce8h:\r
call p_char_lparen\r
call p_arg_ww\r
-out_rparen:\r
- jp p_char_rparen\r
+ jr out_rparen\r
\r
l1cf5h:\r
call p_A_comma\r
sub_1d2ch:\r
call p_char_lparen\r
ld a,(iy+001h)\r
- jp l1e6bh\r
+p_arg_nn_rp:\r
+ call out_hex\r
+out_rparen:\r
+ jr p_char_rparen\r
+\r
l1d37h:\r
call sub_1d2ch\r
jr p_char_comma_A\r
call p_arg_addr\r
p_char_comma_A:\r
call p_char_comma\r
+ jr p_char_A\r
+\r
+p_A_comma:\r
+ call p_char_A\r
+p_char_comma:\r
+ ld a,','\r
+ db 021h\r
p_char_A:\r
ld a,'A'\r
- jr outchar1\r
-p_arg_a_addr:\r
- call p_A_comma\r
- jp p_arg_addr\r
+ db 021h\r
l1d85h:\r
ld a,'0'\r
- jr outchar1\r
+ db 021h\r
l1d89h:\r
ld a,'1'\r
- jr outchar1\r
+ db 021h\r
l1d8dh:\r
ld a,'2'\r
- jr outchar1\r
-\r
-p_A_comma:\r
- call p_char_A\r
-p_char_comma:\r
- ld a,','\r
-outchar1:\r
+ db 021h\r
+p_char_rparen:\r
+ ld a,')'\r
+ db 021h\r
+p_char_lparen:\r
+ ld a,'('\r
jp outchar\r
\r
l1d92h:\r
call p_char_comma\r
jr p_arg_addr\r
\r
+p_arg_a_addr:\r
+ call p_A_comma\r
+p_arg_addr:\r
+ call p_char_lparen\r
+ ld l,(iy+001h)\r
+ ld h,(iy+002h)\r
+ ld a,001h\r
+ call sub_1d50h\r
+ jr p_char_rparen\r
+\r
p_arg_bitop:\r
ld a,(isprefix_ixiy)\r
and a\r
l1e11h:\r
jr p_arg_r0\r
\r
-p_arg_addr:\r
- call p_char_lparen\r
- ld l,(iy+001h)\r
- ld h,(iy+002h)\r
- ld a,001h\r
- call sub_1d50h\r
-\r
-p_char_rparen:\r
- ld a,')'\r
- jp outchar\r
-\r
p_arg_r:\r
ld a,(iy+000h)\r
rra\r
l1e4dh:\r
call pstr\r
ld a,(iy+001h)\r
- and a\r
- jp m,l1e61h\r
- call pstr_inl\r
- dc '+'\r
- ld a,(iy+001h)\r
- jr l1e6bh\r
-l1e61h:\r
- call pstr_inl\r
- dc '-'\r
- ld a,(iy+001h)\r
+ push af\r
+ rlca\r
+ ld a,'+'\r
+ jr nc,l1e61h\r
+ pop af\r
neg\r
-l1e6bh:\r
- call out_hex\r
- jr p_char_rparen\r
+ push af\r
+ ld a,'-'\r
+l1e61h:\r
+ call outchar\r
+ pop af\r
+ jp p_arg_nn_rp\r
\r
p_arg_r1:\r
ld hl,t_BCDEHL_HL_A\r
call sel_dc_string\r
jp pstr\r
\r
+;-------------------------------------------------------------------------------\r
+\r
t_MNEMONICS:\r
DC 'ADC'\r
DC 'ADD'\r
DC '(C)'\r
DB 0\r
\r
+;-------------------------------------------------------------------------------\r
+\r
sub_1ffeh:\r
ld hl,(reg.pc)\r
ld a,h\r
scf\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+\r
b_2039_start:\r
db 0ffh,0ddh,000h ;Prefix DD\r
dw l20a7h\r
dw l20c5h\r
db 0\r
\r
+;-------------------------------------------------------------------------------\r
+\r
l2080h:\r
ld a,(b_21e2_start)\r
and a\r
l2115h:\r
and a\r
ret\r
+\r
+;-------------------------------------------------------------------------------\r
+; >>C[N][J] [steps]\r
+; >>C[N][J] W expression\r
+; >>C[N][J] U expression\r
+; trace over Calls [No list] [Jumps only] /.While./.Until.\r
+\r
cmd_C:\r
ld hl,cmd_C\r
ld a,1\r
jr l2122h\r
+\r
+;-------------------------------------------------------------------------------\r
+; >>T[N][J] [steps]\r
+; >>T[N][J] W expression\r
+; >>T[N][J] U expression\r
+; Trace [no List] [Jumps only] / .While. / .Until.\r
+\r
cmd_T:\r
xor a\r
ld hl,cmd_T\r
cp 045h\r
ret\r
\r
+;-------------------------------------------------------------------------------\r
+\r
b_21e2_start:\r
db 0\r
trace_call_flag:\r
ds EXPR_BUF_SIZE - ($ - expr_buf)\r
expr_bufe:\r
\r
+;-------------------------------------------------------------------------------\r
+\r
msg_Y:\r
dc 'Yn'\r
reg_Y:\r