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|
; Disassembled ddtz.com, version "DDT/Z [8101]"
; with modified relocater.
;
; Build steps:
; - Assemble to a .REL file with M80 or a compatible assembler.
; - Use Digital Research Link-80 to generate a .PRL file (op switch).
; - Cut the .PRL header (first 256 byte) end rename the result to DDTZ.COM.
; Some greneral definitions
BS equ 08h
TAB equ 09h
CR equ 0dh
LF equ 0ah
DEL equ 7fh
CNTRX equ 'X'-'@'
; CP/M memory layout
BDOS equ 5
TPA equ 0100h
; ddtz specific definitions
STACK_SIZE equ 80 ;ddtz internal stack
CONBUF_SIZE equ 80 ;Size of console input buffer
BP_CNT equ 12 ;Number of breakpoints
BP_SIZE equ 4 ;Size of a breakpoint record
bitmap_size equ (prog_size+7)/8
;-------------------------------------------------------------------------------
cseg
start::
ddtz_base::
jr reloc
nop
l0003h:
rst 30h ;rst used by ddtz
di_or_ei: ;ints enabled/disabled while ddtz is running
nop
ret
convec:
const: jp cist ; return console input status
conin: jp ci ; return console input character
conout: jp co ; send console output character
;-------------------------------------------------------------------------------
signon:
db 'DDTZ/180'
db ' - Version '
maclib version.inc
defvers
dc ' ('
;-------------------------------------------------------------------------------
; Clear old position
cmde_clr:
ld (hl),0
inc hl
dec bc
ld a,b
or c
jr nz,cmde_clr
; Determine current position
reloc:
ld bc,(028h-2)
ld de,(028h)
ld a,i ;get iff2
ex af,af'
di
ld sp,028h ;rst instr needs a minimal stack
ld hl,0e9e1h ;opcpdes pop hl/jp (hl)
ld (028h),hl
rst 028h
wearehere:
ld (028h-2),bc
ld (028h),de
ld de,-(wearehere-ddtz_base)
add hl,de ; hl:
ld de,ddtz_base ; de:
or a
sbc hl,de
ex de,hl ; de: reloc offset
ld hl,stack
add hl,de
ld sp,hl
ex af,af'
push af
pop bc
bit 2,c
jr z,$+3
ei
ld hl,ddtz_end ;start of reloc bitmap
add hl,de
push hl
exx
pop hl
ld bc,0108h ;init bit counter b (c==reload val)
exx
LD HL,ddtz_base
add hl,de ;--> ddtz_base
ld bc,prog_size
reloc_lp:
EXX
djnz reloc_nl
ld b,c ;reload bit counter
LD e,(HL) ;get next 8 relocation bits
INC HL
reloc_nl:
sla e
EXX
JR NC,reloc_next
DEC HL
LD A,(HL)
ADD A,E
LD (HL),A
INC HL
LD A,(HL)
ADC A,D
LD (HL),A
reloc_next:
inc hl
dec bc
ld a,b
or c
jr nz,reloc_lp
;-------------------------------------------------------------------------------
init::
LD SP,stack
ld hl,(1) ;wboot addr
ld de,convec
ex de,hl
ld b,3
vini_l:
inc de
inc de
inc de
inc hl
ld (hl),e
inc hl
ld (hl),d
inc hl
djnz vini_l
ld hl,signon
call pstr
ld hl,ddtz_base
call out_hl
call pstr_inl
dc ' - '
ld de,prog_size+bitmap_size-1
add hl,de
call out_hl
call pstr_inl
dc ')',CR,LF
ld a,i
ld (reg.i),a
ld a,0f3h
jp po,l0093h
ld a,0fbh
l0093h:
ld (reg.iff),a
call di_or_ei
ld hl,ddtz_base
ld l,000h
ld (reg_sp),hl
jp mainloop
;-------------------------------------------------------------------------------
cist:
ci:
co:
ret
;-------------------------------------------------------------------------------
CMDTAB::
; dw ERROR ;cmd_@ ;examine/substitute the displacement register @
; dw ERROR ;cmd_A ;Assemble
dw cmd_B ;Breakpoints display/set/clear
dw ERROR ;cmd_C ;trace over Calls
dw cmd_D ;Display memory in hex and ascii
dw cmd_E ;rElocate debugger
dw ERROR ;cmd_F ;specify Filename and command line
dw cmd_G ;Go
dw cmd_H ;compute Hex and other expressions
dw cmd_I ;Input a byte from port
dw ERROR ;
dw ERROR ;
dw cmd_L ;List disassembled code
dw cmd_M ;Move memory [and verify]
dw ERROR ;
dw cmd_O ;Output a byte to port
dw ERROR ;
dw cmd_Q ;Qery memory for byte string
dw cmd_R ;Read binary or hex file
dw cmd_S ;Substitute memory
dw cmd_T ;Trace
dw ERROR ;
dw cmd_V ;Verify (compare) two memory areas
dw ERROR ;cmd_W ;Write a file to disk
dw cmd_X ;eXamine [and substitute] registers
dw ERROR ;cmd_Y ;examine [and substitute] Y variables
dw cmd_Z ;Zap (fill) memory with a byte string
ERROR:
call pstr_inl
dc '?',CR,LF
;fall thru
mainloop::
ld sp,stack
ld hl,(reg.pc)
call bp_clr_temporary
ld hl,(cmd_rpt)
ld de,mainloop
push de
call cp_hl_de
ld a,'>'
call outchar
call nz,outchar
call z,outbl
call get_line
call skipbl
jr z,exe_hl
pop hl
push hl
ld (cmd_rpt),hl
inc de
sub 'B'
jr c,ERROR
cp 'Z'+1-'@'
jr nc,ERROR
ld hl,CMDTAB
call add_hl_a2
ld a,(hl)
inc hl
ld h,(hl)
ld l,a
exe_hl:
CALL_HL:
jp (hl)
;-------------------------------------------------------------------------------
crlf:
call pstr_inl
dc CR,LF
xor a
ld (con_col),a
call inchar
jr c,mainloop
ret
sub_01d9h:
call pstr_inl
dc '-'
jp neg.hl
out_hl_dec_neg:
push hl
call sub_01d9h
defb 03eh ;ld a,.. swallow push hl
out.hl.dec:
push hl
ld b,006h
call sub_01f9h
pop hl
call pstr_inl
dc '.'
l01f3h:
call outbl
djnz l01f3h
ret
sub_01f9h:
dec b
push de
ld de,10
call div_hl_de
ld a,h
or l
call nz,sub_01f9h
ld a,e
pop de
jr out_dgt
out_hl_neg:
push hl
call sub_01d9h
call out_hl
pop hl
ret
out_hl:
ld a,h
call out_hex
ld a,l
out_hex:
push af
rra
rra
rra
rra
call out_dgt
pop af
out_dgt:
or 0f0h
daa
add a,0a0h
adc a,040h
jr outchar
out.bin.w:
ld a,h
call out.bin.b
ld a,l
out.bin.b:
ld b,8
l01c9h:
rlca
push af
and 1
call out_dgt
pop af
djnz l01c9h
ld a,'"'
jr outchar
out.ascii:
push bc
ld c,a
res 7,a
cp ' '
push af
call nc,outbl
call pstr_inl
dc ''''
pop af
jr nc,l0242h
sub 0c0h
ld b,a
call pstr_inl
dc '^'
ld a,b
l0242h:
call outchar
cp ''''
call z,outchar
call pstr_inl
dc ''''
sla c
pop bc
ret nc
ld a,'.'
jr outchar
outbl6:
call outbl2
outbl4:
call outbl2
outbl2:
call outbl
outbl:
ld a,' '
outchar:
push ix
push iy
push hl
push de
push bc
push af
and 07fh
ld c,a
call conout
ld hl,con_col
inc (hl)
pop af
pop bc
pop de
pop hl
pop iy
pop ix
ret
p_goto_col:
ld a,(con_col)
cp c
ret nc
ret z
call outbl
jr p_goto_col
;-------------------------------------------------------------------------------
incharw:
call inchar
jr nc,incharw
ret
;-------------------------------------------------------------------------------
inchar:
push ix
push hl
push de
push bc
call const
and a
jr z,inch1
call conin
scf
inch1:
pop bc
pop de
pop hl
pop ix
ret
;-------------------------------------------------------------------------------
DELC:
ld a,b
or a
ret z
call DELC1
dec hl
dec b
ld a,(hl)
cp ' '
ret nc
DELC1:
call pstr_inl
dc BS,' ',BS
ret
DELL:
ld a,b ;
or a ;
ret z ;
call DELC ;
jr DELL ;
;-------------------------------------------------------------------------------
get_line:
push hl ;
ld hl,conbuf ;
ld b,0 ;
inlnxtch:
ld a,b ;
cp CONBUF_SIZE ;
jr z,inl_e ;
call incharw ;
cp CR ;
jr z,inl_e ;Accept line
cp LF ;
jr z,inl_e ;Accept line
cp BS ;
jr z,gl_1 ;
cp DEL ;
jr nz,gl_2 ;
gl_1:
call DELC ;Delete Char
jr inlnxtch ;
gl_2:
cp CNTRX ;
jr nz,gl_3 ;
call DELL ;Delete Line
jr inlnxtch ;
gl_3:
cp TAB ;
jr nz,gl_4 ;
ld a,' ' ;
gl_4:
ld (hl),a ;
cp ' ' ;
jr nc,gl_5 ;
ld a,'^' ;Controll characters
call outchar ;
ld a,(hl) ;
add a,'@' ;
gl_5:
call outchar ;
inc hl ;
inc b ;
jr inlnxtch ;
inl_e:
ld (hl),0
call CRLF ;
ld de,conbuf ;
pop hl ;
ret ;
;-------------------------------------------------------------------------------
get_char_upper:
ld a,(de)
toupper:
cp 'a'
ret c
cp 'z'+1
ccf
ret c
and 05fh
ret
;-------------------------------------------------------------------------------
skipbl0:
inc de
skipbl:
call get_char_upper
cp ' '
jr z,skipbl0
or a
ret
;-------------------------------------------------------------------------------
next_arg:
call skipbl
cp ','
ret nz
call skipbl0
cp a
ret
assert_eol:
call skipbl
ret z
to_error:
jp ERROR
;-------------------------------------------------------------------------------
chk_stack:
push hl
push de
ld hl,0
add hl,sp
ld de,stack-(STACK_SIZE-28)
call cp_hl_de
pop de
pop hl
jr c,to_error
ret
;-------------------------------------------------------------------------------
add_hl_a2:
add a,a
add_hl_a:
add a,l
ld l,a
ret nc
inc h
ret
cp_hl_de:
and a
sbc hl,de
add hl,de
ret
;-------------------------------------------------------------------------------
lookupch:
ld b,0
l02f5h:
ld a,(hl)
and a
ret z
call get_char_upper
cp (hl)
jr z,l0300h
inc hl
inc b
jr l02f5h
l0300h:
scf
inc de
ret
sub_0303h:
ld hl,t_reg_names
ld b,07fh
l030ch:
inc b
ld a,(hl)
and a
ret z
call sub_031ch
jr nc,l030ch
res 7,b
ret
sub_031ch:
push bc
push de
l031eh:
call get_char_upper
xor (hl)
and 07fh
jr nz,l0336h
bit 7,(hl)
inc hl
inc de
jr z,l031eh
scf
bit 7,b
call z,sub_060ch
jr nc,l0339h
pop af
scf
pop bc
ret
l0336h:
call str_sel_next
l0339h:
pop de
and a
pop bc
ret
str_sel:
inc b
jr str_sel2
str_sel1:
call str_sel_next
str_sel2:
djnz str_sel1
ret
str_sel_next:
ld a,(hl)
and a
ret z
l0348h:
ld a,(hl)
inc hl
and a
ret m
jr l0348h
get_arg_range_target:
call get_arg_range
push hl
push bc
call next_arg
call get_arg_final
ex de,hl
pop bc
pop hl
ret
sub_035dh:
call expr
jr c,error0
ret
get_arg_final:
call sub_035dh
l0366h:
jp assert_eol
get_lastarg_def:
call get_arg_def
jr l0366h
get_arg_def:
push hl
call expr
jr c,l0375h
ex (sp),hl
l0375h:
pop hl
ret
sub_0377h:
call b_037c_start
jr l0366h
b_037c_start:
defb 0e6h ;and a,.. clear carry
get_arg_range:
scf
ex af,af'
push bc
push hl
call expr
jr nc,l038ch
ex af,af'
jr c,error0
ex af,af'
pop hl
defb 03eh ;ld a,.. swallow pop af
l038ch:
pop af
call get_range
jr nc,l0398h
ex af,af'
pop bc
ret nc
error0:
jp ERROR
l0398h:
pop af
ret
get_range:
call next_arg
cp 'S'
jr nz,l03a2h
inc de
l03a2h:
push hl
push af ;'S' flag
call expr
jr c,l03b8h
ld b,h
ld c,l
pop af
pop hl
jr z,l03b6h ;'S'?
ld a,c
sub l
ld c,a
ld a,b
sbc a,h
ld b,a
inc bc
l03b6h:
and a
ret
l03b8h:
pop af
pop hl
jr z,error0 ;'S', but no expression following
scf
ret
;-------------------------------------------------------------------------------
expr:
call skipbl
expr1:
call do_factor
ret c
l0433h:
call do_binary_op
push hl
push bc
call do_factor
pop bc
ex de,hl
ex (sp),hl
jr nc,l0447h
pop de
ld a,b
or c
ret z
jp ERROR
l0447h:
ld a,b
or c
push bc
ret nz
pop bc
doop_add:
add hl,de
l044dh:
pop de
jr l0433h
doop_sub:
and a
sbc hl,de
jr l044dh
doop_mlt:
push bc
ld b,h
ld c,l
ld hl,0
ld a,010h
l045dh:
add hl,hl
ex de,hl
add hl,hl
ex de,hl
jr nc,l0464h
add hl,bc
l0464h:
dec a
jr nz,l045dh
pop bc
jr l044dh
doop_div:
call div_hl_de
jr l044dh
doop_mod:
call div_hl_de
ex de,hl
jr l044dh
; divide x/y
; hl: x
; de: y
; return:
; hl: q (x/y)
; de: r (x%y)
div_hl_de:
push bc
ex de,hl ;de: x
ld b,h ;bc: y
ld c,l
ld hl,0 ;hl: r
ld a,16
; de: x (x shifted out, q shifted in)
; bc: y
; hl: r (initially 0)
div_lp:
ex de,hl
add hl,hl ;x <<= 1
ex de,hl
adc hl,hl ;r <<= 1
inc de
or a
sbc hl,bc
jr nc,div_norestore
dec de
add hl,bc
div_norestore:
dec a
jr nz,div_lp
ex de,hl
pop bc
ret
doop_and:
ld a,h
and d
ld h,a
ld a,l
and e
ld l,a
jr l044dh
doop_or:
ld a,h
or d
ld h,a
ld a,l
or e
ld l,a
jr l044dh
doop_xor:
ld a,h
xor d
ld h,a
ld a,l
xor e
ld l,a
jr l044dh
do_binary_op:
push hl
ld hl,tab_op_a
call lookupch
ld a,b
ld hl,tblf_opa
call add_hl_a2
ld c,(hl)
inc hl
ld b,(hl)
pop hl
ret
tab_op_a:
DB '+-*/%&!#',0
tblf_opa:
dw doop_add
dw doop_sub
dw doop_mlt
dw doop_div
dw doop_mod
dw doop_and
dw doop_or
dw doop_xor
dw 0
;-------------------------------------------------------------------------------
fact_factor:
call do_factor
ret nc
jp ERROR
do_factor:
call chk_stack
call get.number
ret nc
inc de
ld hl,ddtz_base-1
cp 'T'
ret z
ld hl,(high_load)
cp 'H'
ret z
ld hl,(max_load)
cp 'M'
ret z
ld hl,TPA
cp 'L'
ret z
ld hl,(reg.pc)
cp '$'
ret z
cp '-'
jr z,fact_factneg
cp '~'
jr z,fact_factinv
cp '+'
jr z,fact_factor
cp '^'
jr z,fact_reg.CPU
cp '('
jr z,fact_mem
cp '['
jr z,expr_brckt
cp ''''
jr z,fact_factstring
dec de
scf
ret
;-------------------------------------------------------------------------------
fact_factstring:
ld hl,0
l054bh:
ld a,(de)
cp ''''
jr z,l0557h
and a
ret z
l0552h:
ld h,l
ld l,a
inc de
jr l054bh
l0557h:
inc de
ld a,(de)
cp ''''
jr z,l0552h
sub '.'
or a
ret nz
inc de
set 7,l
ret
fact_reg.CPU:
call sub_0caeh
jr nc,error1
ld a,(hl)
inc hl
ld h,(hl)
ld l,a
and a
bit 0,c
ret nz
ld h,000h
ret
fact_factinv:
call fact_factor
jr cpl.hl
fact_factneg:
call fact_factor
neg.hl:
dec hl
cpl.hl:
ld a,h
cpl
ld h,a
ld a,l
cpl
ld l,a
ret
fact_mem:
call expr1
jr c,error1
ld a,(de)
cp ')'
jr nz,error1
inc de
ld a,(hl)
inc hl
ld h,(hl)
ld l,a
ld a,(de)
inc de
cp '.'
ret z
dec de
xor a
ld h,a
ret
expr_brckt:
call expr1
jr c,error1
ld a,(de)
cp ']'
inc de
ret z
error1:
jp ERROR
;-------------------------------------------------------------------------------
get.number:
call get.hexdigit
ret c
push de
test_number:
inc de
call get.hexdigit
jr nc,test_number
pop de
cp '.'
jr z,get_dec_number
cp '"'
jr z,get_bin_number
ld hl,0
next_hexdigit:
call get.hexdigit
jr c,hexnum_done
add hl,hl
add hl,hl
add hl,hl
add hl,hl
call add_hl_a
inc de
jr next_hexdigit
hexnum_done:
xor 'H'
ret nz
inc de
ret
get_bin_number:
ld hl,0
next_bindigit:
call get.bindigit
l05dbh:
inc de
jr c,l05e4h
add hl,hl
call add_hl_a
jr next_bindigit
l05e4h:
cp '"'
jr nz,error11
call get.bindigit
jr nc,l05dbh
or a
ret
get_dec_number:
ld hl,0
next_decdigit:
call get.decdigit
inc de
jr c,decnum_done
push bc
add hl,hl
ld b,h
ld c,l
add hl,hl
add hl,hl
add hl,bc
pop bc
call add_hl_a
jr next_decdigit
decnum_done:
cp '.'
ret z
error11:
jp ERROR
sub_060ch:
call get_char_upper
cp 'Z'+1
jr l0614h
get.hexdigit:
ld a,(de)
hex_digit:
call toupper
cp 'F'+1
l0614h:
ccf
ret c
cp 'A'
jr c,l061eh
sub 'A'-10
ret
get.decdigit:
call get_char_upper
l061eh:
cp '9'+1
jr l0625h
get.bindigit:
call get_char_upper
cp '1'+1
l0625h:
ccf
ret c
cp '0'
ret c
sub '0'
ret
;-------------------------------------------------------------------------------
p_cpustat0:
call assert_eol
p_cpustat:
call p_f
call outbl2
ld hl,b_06e9_start
ld de,b_0709_start
ld b,6
l063eh:
call p_regs
djnz l063eh
call outbl6
push hl
push de
ld iy,(reg.pc)
call p_disas_instr
pop de
pop hl
call crlf
call p_f2
call outbl2
ld b,7
l065bh:
call p_regs
djnz l065bh
jp crlf
p_f:
ld a,(reg.f)
call p_flags
ld a,(reg.iff)
cp 0f3h
jr z,outbl_1
ld a,'E'
jp outchar
p_f2:
ld a,(reg.f2)
call p_flags
jr outbl_1
p_flags:
push hl
ld hl,t_flag_names+7
ld c,a
ld b,8
fl_loop:
ld a,' '
cp (hl)
ld a,c
rlca
ld c,a
jr z,fl_skip
ld a,(hl)
call c,outchar
call nc,outbl
fl_skip:
dec hl
djnz fl_loop
pop hl
ret
p_regs:
push de
call pstr
call pstr_inl
dc '='
ex (sp),hl
ld e,(hl)
inc hl
ld d,(hl)
inc hl
ld a,(hl)
inc hl
push hl
and a
jr z,l06deh
ex de,hl
ld e,(hl)
inc hl
ld d,(hl)
ex de,hl
call out_hl
jr l06e2h
l06deh:
ld a,(de)
call out_hex
l06e2h:
pop de
pop hl
outbl_1:
jp outbl
b_06e9_start:
DC 'A '
DC 'BC '
DC 'DE '
DC 'HL '
DC 'SP'
DC 'PC'
DC 'a'''
DC 'bc'''
DC 'de'''
DC 'hl'''
DC 'IX'
DC 'IY'
DC 'I'
DB 0
b_0709_start:
dw reg.a
db 000h
dw reg.c
db 001h
dw reg.e
db 001h
dw reg.l
db 001h
dw reg_sp
db 001h
dw reg.pc
db 002h
dw reg.a2
db 000h
dw reg.c2
db 001h
dw reg.e2
db 001h
dw reg.l2
db 001h
dw reg.ix
db 001h
dw reg.iy
db 001h
dw reg.i
db 000h
db 000h
;-------------------------------------------------------------------------------
; > E addr
; relocate debugger to addr
; > ER addr
; relocate just below addr
;
; Move debugger to given address and restart.
; New location must not overlap with current location.
cmd_E:
call skipbl
sub 'R'
jr nz,$+3
inc de
push af
call get_arg_final
ld bc,prog_size+bitmap_size
pop af
jr nz,cmde_bottom
sbc hl,bc
cmde_bottom:
ld ix,cmde_clr-ddtz_base
ex de,hl ;de = dst
add ix,de
ld hl,ddtz_base ;hl = src
push hl
or a
sbc hl,de
call c,neg.hl ;abs(distance)
or a
sbc hl,bc
jp c,error
pop hl
push hl
push bc
ldir
pop bc
pop hl
jp (ix)
;-------------------------------------------------------------------------------
; > G [startaddr] [;breakp..]
; Go [to start] [with temporary breakpoints]
cmd_G:
sub a
ld (bp_p_cpu_flag),a
call expr
jr c,l0740h
ld (reg.pc),hl
l0740h:
call skipbl
jr z,user_go0
cp ';'
jp nz,ERROR
inc de
ld a,002h
call bp_enter
user_go0:
jp user_go
;-------------------------------------------------------------------------------
bpl_init:
ld b,BP_CNT
ld ix,bp_tab
ex (sp),hl
ld (pbl_loop_adr),hl
ex (sp),hl
ret
bpl_next:
ld de,BP_SIZE
push af
add ix,de
pop af
dec b
ret z
ex (sp),hl
ld hl,(pbl_loop_adr)
ex (sp),hl
ret
bp_clr_temporary:
call bpl_init
ld a,(ix+000h)
and 0f1h
ld (ix+000h),a
call bpl_next
ret
;-------------------------------------------------------------------------------
; > B
; display all breakpoints
; > B breakp [breakp..]
; set breakpoints
; > BX
; clear all breakpoints
; > BX breakp [breakp..]
; clear breakpoints
;
; breakp can be any valid expression
cmd_B:
call skipbl
jr z,bp_print
inc de
cp 'X'
jr z,bp_clr0
dec de
ld a,001h
jp bp_enter
bp_clr0:
call skipbl
jr z,bp_clr_all
bp_clr_next:
call expr
jp c,assert_eol
push de
call bp_clr
pop de
call next_arg
jr bp_clr_next
bp_clr_all:
scf
bp_clr:
call bpl_init
push af
jr c,l07a7h
ld e,(ix+002h)
ld d,(ix+003h)
call cp_hl_de
jr nz,l07aeh
l07a7h:
ld (ix+000h),000h
l07aeh:
pop af
call bpl_next
ret
bp_print:
ld c,0
call bpl_init
bit 0,(ix+000h)
jr z,bp_pr_cont
ld l,(ix+002h)
ld h,(ix+003h)
call out_hl
call outbl2
inc c
bp_pr_cont:
call bpl_next
ld a,c
or a
call nz,crlf
ret
;-------------------------------------------------------------------------------
; Add break points to list
; A = 1 Permanent (B command)
; A = 2 Temporary (G command)
bp_enter:
ld b,a
call skipbl
ret z
push bc
call expr
jr c,error12
pop bc
bit 0,b
push bc
push de
push hl
call nz,bp_clr
pop hl
call bp_get_freeslot
pop de
ld (ix+002h),l
ld (ix+003h),h
call next_arg
pop af
ld (ix+000h),a
and 00fh
jr bp_enter
bp_get_freeslot:
call bpl_init
ld a,(ix+000h)
and 00fh
ret z
call bpl_next
error12
jp ERROR
;-------------------------------------------------------------------------------
; Breakpoint handling routine.
bpddtz:
ld (reg.l),hl
pop hl
dec hl
ld (reg.pc),hl
ld (reg_sp),sp
ld sp,reg.l
push de
push bc
push af
push ix
push iy
ld a,i
call di_or_ei
ld h,a
ld l,000h
push hl
ld a,0f3h ; EI
jp po,l08dfh
ld a,0fbh ; DI
l08dfh:
ld (reg.iff),a
ex af,af'
push af
exx
push bc
push de
push hl
call bp_restore_mem
ld a,(b_21e2_start)
dec a
jr z,l090bh
call inchar ;Keyboard hit?
jr c,do_break ;yes
call sub_0913h
and a
jp z,user_go
and 083h
jp z,l2151h
do_break:
call bp_clr_temporary
call p_cpustat
jp mainloop
l090bh:
ld (b_21e2_start),a
ld c,007h
jp l0a41h
sub_0913h:
ld a,080h
ex af,af'
sub a
ld (bp_p_cpu_flag),a
call bpl_init
ld a,(ix+000h)
and 007h
jr z,l0938h
ld e,(ix+002h)
ld d,(ix+003h)
ld hl,(reg.pc)
call cp_hl_de
jr nz,l0938h
ex af,af'
res 7,a
or (ix+000h)
ex af,af'
l0938h:
call bpl_next
ex af,af'
ret
bp_restore_mem:
call bpl_init
bit 5,(ix+000h)
res 5,(ix+000h)
jr z,l099ah
ld l,(ix+002h)
ld h,(ix+003h)
ld a,(l0003h)
cp (hl)
jr nz,l099ah
ld a,(ix+001h)
ld (hl),a
l099ah:
res 3,(ix+000h)
call bpl_next
ret
bp_tst_@pc:
call bpl_init
ld a,(ix+000h)
and 003h
jr z,bp_tst_e
ld e,(ix+002h)
ld d,(ix+003h)
ld hl,(reg.pc)
call cp_hl_de
ret z
bp_tst_e:
call bpl_next
sub a
inc a
ret
bp_trace_enter:
call bp_get_freeslot
ld (ix+002h),l
ld (ix+003h),h
ld a,(b_21e2_start)
and a
ld a,008h
jr nz,bp_t_e
rra
bp_t_e:
ld (ix+000h),a
ret
bp_set_to_mem:
call bpl_init
ld a,(ix+000h)
and c
jr z,l0a1dh
set 5,(ix+000h)
ld l,(ix+002h)
ld h,(ix+003h)
ld a,(hl)
ld (ix+001h),a
ld a,(l0003h)
ld (hl),a
and 038h
ld h,000h
ld l,a
ld (hl),0c3h
inc hl
ld de,bpddtz
ld (hl),e
inc hl
ld (hl),d
l0a1dh:
call bpl_next
ret
;-------------------------------------------------------------------------------
user_go:
sub a
ld (b_21e2_start),a
ld a,(bp_p_cpu_flag)
and a
call nz,p_cpustat
call bp_tst_@pc
ld c,007h
jr nz,l0a41h
ld a,001h
ld (b_21e2_start),a
call tc_set_bp
ld c,008h
l0a41h:
call bp_set_to_mem
ld sp,reg.l2
pop hl
pop de
pop bc
pop af
exx
ex af,af'
pop af
ld i,a
pop iy
pop ix
pop af
pop bc
pop de
pop hl
ld sp,(reg_sp)
jp reg.iff
;-------------------------------------------------------------------------------
; > Y
; examine all Y variables
; > Y[0..9]
; examine (and substitute) an Y variable
;-------------------------------------------------------------------------------
; > X
; eXamine (display) all cpu registers and
; the instruction at the current program counter
; > X register
; eXamine (and substitute) a register
cmd_X:
call skipbl
call sub_0caeh
jp nc,p_cpustat0
call assert_eol
ld a,b
cp 25
jr z,l0c5fh
cp 26
jr z,l0c4fh
ex de,hl
ld hl,t_reg_names
call pstr_sel
call l0c33h
call outbl
push de
push bc
call get_line
call skipbl
jr z,l0c30h
call get_arg_final
ex de,hl
pop bc
pop hl
ld (hl),e
bit 0,c
ret z
inc hl
ld (hl),d
ret
l0c30h:
pop af
pop hl
ret
l0c33h:
call pstr_inl
dc '='
ld a,(de)
bit 0,c
jp z,out_hex
ld l,a
inc de
ld a,(de)
dec de
ld h,a
jp out_hl
l0c4fh:
call p_f
ld a,0f3h
ld (reg.iff),a
scf
call sub_0c6ah
ld (reg.f),a
ret
l0c5fh:
call p_f2
and a
call sub_0c6ah
ld (reg.f2),a
ret
sub_0c6ah:
push af
call outbl
call assert_eol
call get_line
pop af
ex af,af'
ld b,0
l0c76h:
call skipbl
ld a,b
ret z
push bc
ld hl,t_flag_names
call lookupch
jp nc,ERROR
inc b
xor a
scf
nxt_f:
rla
djnz nxt_f
pop bc
jr c,l0c97h
or b
ld b,a
jr l0c76h
l0c97h:
ex af,af'
jp nc,ERROR
ex af,af'
ld a,0fbh
ld (reg.iff),a
jr l0c76h
t_flag_names:
db 'CNV H ZSE',0
sub_0caeh:
call sub_0303h
ret nc
ld a,b
add a,b
add a,b
ld hl,b_0cfa_start
call add_hl_a
ld c,(hl)
inc hl
ld a,(hl)
inc hl
ld h,(hl)
ld l,a
scf
ret
t_reg_names:
DC 'BC''' ;0
DC 'DE''' ;1
DC 'HL''' ;2
DC 'BC' ;3
DC 'DE' ;4
DC 'HL' ;5
DC 'A''' ;6
DC 'B''' ;7
DC 'C''' ;8
DC 'D''' ;9
DC 'E''' ;10
DC 'H''' ;11
DC 'L''' ;12
DC 'A' ;13
DC 'B' ;14
DC 'C' ;15
DC 'D' ;16
DC 'E' ;17
DC 'H' ;18
DC 'L' ;19
DC 'IX' ;20
DC 'IY' ;21
DC 'SP' ;22
DC 'PC' ;23
DC 'I' ;24
DC 'F''' ;25
DC 'F' ;26
DB 0
b_0cfa_start:
db 003h
dw reg.c2
db 003h
dw reg.e2
db 003h
dw reg.l2
db 003h
dw reg.c
db 003h
dw reg.e
db 003h
dw reg.l
db 000h
dw reg.a2
db 000h
dw reg.b2
db 000h
dw reg.c2
db 000h
dw reg.d2
db 000h
dw reg.e2
db 000h
dw reg.h2
db 000h
dw reg.l2
db 000h
dw reg.a
db 000h
dw reg.b
db 000h
dw reg.c
db 000h
dw reg.d
db 000h
dw reg.e
db 000h
dw reg.h
db 000h
dw reg.l
db 003h
dw reg.ix
db 003h
dw reg.iy
db 003h
dw reg_sp
db 003h
dw reg.pc
db 000h
dw reg.i
db 000h
dw reg.f2
db 000h
dw reg.f
;-------------------------------------------------------------------------------
; > S [startaddr]
; Substitute memory
cmd_S:
ld hl,(last_S)
call get_lastarg_def
l0d60h:
ld (last_S),hl
call out_hl
call outbl
ld a,(hl)
call out_hex
call outbl2
call get_line
call skipbl
inc hl
jr z,l0d60h
dec hl
inc de
cp '.'
jr nz,cmds_dash
call get_char_upper
or a
jr nz,l0d8ah
ret
cmds_dash:
jp z,assert_eol
cp '-'
jr nz,l0d8ah
call get_char_upper
or a
dec hl
jr z,l0d60h
inc hl
l0d8ah:
dec de
call sub_0ef8h
jr l0d60h
;-------------------------------------------------------------------------------
; > @
; examine (substitute) displacement register @
;cmd_@:
;-------------------------------------------------------------------------------
; >>I [port]
; Input a byte from port
cmd_I:
ld (cmd_rpt),hl
ld hl,(last_I)
call get_lastarg_def
ld (last_I),hl
ld b,h
ld c,l
in a,(c)
push af
call out_hex
call outbl4
pop af
call out.bin.b
jp crlf
;-------------------------------------------------------------------------------
; >>O [byte] [port]
; Output a byte to a port
cmd_O:
ld (cmd_rpt),hl
ld hl,(last_O_val)
call get_arg_def
ld a,l
ld (last_O_val),a
push af
call next_arg
ld hl,(last_O_addr)
call get_lastarg_def
ld (last_O_addr),hl
ld b,h
ld c,l
pop af
out (c),a
ret
;-------------------------------------------------------------------------------
; > V startaddr endaddr targetaddr
; Verify (compare) two memory areas
cmd_V:
call get_arg_range_target
l0dedh:
push bc
ld a,(de)
ld b,(hl)
cp b
jr z,l0e10h
ld c,a
call out_hl
call outbl
ld a,b
call out_hex
call outbl2
ld a,c
call out_hex
call outbl
ex de,hl
call out_hl
ex de,hl
call crlf
l0e10h:
pop bc
inc de
cpi
jp pe,l0dedh
ret
;-------------------------------------------------------------------------------
; > M startaddr endaddr destaddr
; Move memory
cmd_M:
call get_arg_range_target
call cp_hl_de
jr nc,cmdm_up
add hl,bc
ex de,hl
add hl,bc
ex de,hl
dec hl
dec de
lddr
ret
cmdm_up:
ldir
ret
;-------------------------------------------------------------------------------
; > H
; display Highest load address of last filed loaded, Maximum "High"
; off all loaded files, and Top address of available memory
; > H expression
; evaluate expression and display result in hex, decimal and other formats
cmd_H:
call expr
jp c,p_max_high0
call assert_eol
call out_hl
call outbl2
call out_hl_neg
call outbl4
call out.hl.dec
call outbl2
call out_hl_dec_neg
call outbl4
call out.bin.w
call outbl2
ld a,l
call out.ascii
jp crlf
;-------------------------------------------------------------------------------
; > Q[J] startaddr endaddr bytes
; Query memory for a byte string [Justified]
cmd_Q:
call get_arg_range
push bc
push hl
call sub_0ee6h
pop hl
l0e96h:
push hl
push de
push bc
l0edah:
ld a,(de)
cp (hl)
jr nz,l0ee2h
inc de
inc hl
djnz l0edah
l0ee2h:
pop bc
pop de
pop hl
jr nz,l0eb0h
push bc
ld bc,16
and a ;clear carry
call sub_0f58h
pop bc
l0eb0h:
inc hl
ex (sp),hl
dec hl
ld a,h
or l
ex (sp),hl
jr nz,l0e96h
pop bc
ret
;-------------------------------------------------------------------------------
; > Z startaddr endaddr bytes
; Zap (fill) memory with a byte string
cmd_Z:
call get_arg_range
push bc
push hl
call sub_0ee6h
ld a,b
pop hl
pop bc
push hl
ex de,hl
l0ec7h:
ldi
jp po,l0ed3h
dec a
jr nz,l0ec7h
pop hl
ldir
ret
l0ed3h:
pop hl
ret
sub_0ee6h:
ld hl,conbuf
call sub_0ef7h
ld de,conbuf
and a
sbc hl,de
ld b,l
ret nz
jp ERROR
sub_0ef7h: ;from cmd_Q, cmd_Z
db 0e6h ;and 037h (clear carry)
sub_0ef8h: ;from cmd_S
scf
l0ef9h:
push af
call next_arg
cp ''''
jr z,l0f1eh
push hl
call expr
ld a,l
pop hl
jr c,l0f42h
ld (hl),a
inc hl
jr l0f3ah
l0f1eh:
inc de
ld a,(de)
cp ''''
jr z,l0f2bh
or a
jr z,l0f42h
l0f27h:
ld (hl),a
inc hl
jr l0f1eh
l0f2bh:
inc de
ld a,(de)
cp ''''
jr z,l0f27h
cp '.'
jr nz,l0f3ah
inc de
dec hl
set 7,(hl)
inc hl
l0f3ah:
pop af
jr nc,l0ef9h
ld (last_S),hl
jr l0ef9h
l0f42h:
pop af
ret nc
ld (last_S),hl
ret
;-------------------------------------------------------------------------------
; >>D [startaddr] [endaddr]
; Display memory in hex and ASCII
cmd_D:
ld (cmd_rpt),hl
ld hl,(last_D)
ld bc,128
call sub_0377h
scf
sub_0f58h:
push bc
push de
push hl
push af
l0f5ch:
call out_hl
call outbl2
ld de,0
l0f68h:
ld a,(hl)
inc hl
call out_hex
call outbl
dec bc
inc e
ld a,e
cp 010h
jr z,l0f80h
and 003h
call z,outbl
ld a,b
or c
jr nz,l0f68h
l0f80h:
call outbl
and a
sbc hl,de
l0f86h:
ld a,(hl)
call sub_0fa3h
call outchar
inc hl
dec e
jr nz,l0f86h
pop af
push af
jr nc,l0f97h
ld (last_D),hl
l0f97h:
call crlf
ld a,b
or c
jr nz,l0f5ch
pop af
pop hl
pop de
pop bc
ret
sub_0fa3h:
and 07fh
cp 07fh
jr z,l0fach
cp ' '
ret nc
l0fach:
ld a,'.'
ret
;-------------------------------------------------------------------------------
; > Fcommandline
; specifiy filenames and command line
;cmd_F:
;-------------------------------------------------------------------------------
; > R [displacement]
; Read Intel Hex File from console [add displacement]
cmd_R:
ld hl,0
call get_lastarg_def ;get offset from command line
push hl
ld hl,0
ld (high_load),hl
w_recstart:
call i.getchar
jr z,rdhex_done
cp ':'
jr nz,w_recstart
ld c,0 ;init checksum
call i.gethexbyte ;record len
ld b,a
call i.gethexbyte ;address high
ld h,a
call i.gethexbyte ;address low
ld l,a
call i.gethexbyte ;record type (ignored)
ld a,b
and a ;record len == 0?
jr z,rdhex_done
l16c6h:
call i.gethexbyte
pop de ;offset
push de
push hl
add hl,de
call i.storebyte
pop hl
inc hl
djnz l16c6h ;repeat for record len
call i.gethexbyte ;checksum
ld a,c
and a
jr nz,error2 ;exit if checksum error
jr w_recstart ;next record
rdhex_done:
pop hl
call i.gethexbyte
jp p_max_high
i.gethexbyte:
call sub_16f6h
rlca
rlca
rlca
rlca
ld d,a
call sub_16f6h
add a,d
ld d,a
add a,c
ld c,a
ld a,d
ret
sub_16f6h:
call i.getchar
jr z,error2
call hex_digit
ret nc
error2:
jp ERROR
i.getchar:
call incharw
cp 01ah
ret
i.storebyte:
push af
push de
ld de,TPA ;lowest allowed load address
call cp_hl_de
jr c,error2
ld de,(BDOS+1) ;highest allowed load address
call cp_hl_de
jr nc,error2
ld de,(high_load)
call cp_hl_de
jr c,l1157h
ld (high_load),hl
l1157h:
ld de,(max_load)
call cp_hl_de
jr c,l1163h
ld (max_load),hl
l1163h:
pop de
pop af
ld (hl),a ;store byte
ret
;-------------------------------------------------------------------------------
p_max_high0:
call assert_eol
p_max_high:
call pstr_inl
DC 'High = '
ld hl,(high_load)
call out_hl
call pstr_inl
DC ' Max = '
ld hl,(max_load)
call out_hl
call pstr_inl
DC ' Top = '
ld hl,ddtz_base-1
call out_hl
jp crlf
;-------------------------------------------------------------------------------
; > Wstartaddr endaddr
; Write a file to disk
;cmd_W:
;-------------------------------------------------------------------------------
; > A [startaddr]
; Assemble Zilog Z180 mnemonics
;cmd_A:
;-------------------------------------------------------------------------------
; >>L [startaddr] [endaddr]
; List disassembled code
cmd_L:
ld (cmd_rpt),hl
call expr
jr nc,l18dbh
ld hl,(last_L)
l18dbh:
call next_arg
call get_range
jr nc,l1905h
call assert_eol
ld b,16
l18ebh:
push bc
call cmdl_p_line
pop bc
djnz l18ebh
ret
l1905h:
call assert_eol
ld d,h
ld e,l
add hl,bc
ex de,hl
l190fh:
push de
call cmdl_p_line
pop de
call cp_hl_de
jr c,l190fh
ret
;-------------------------------------------------------------------------------
cmdl_p_line:
push hl
call out_hl
call outbl2
sub a
ld (con_col),a
push hl
pop iy
call p_disas_instr
call crlf
pop hl
ld c,b
ld b,0
add hl,bc
ld (last_L),hl
ret
;-------------------------------------------------------------------------------
p_disas_instr:
call disas_get_instrlen
jr nc,l197fh
push bc
ld a,(con_col)
add a,5
ld c,a
call pstr ;print mnemonic
call p_goto_col
call pr_instr_args ;print arguments
pop bc
scf
ret
l197fh:
call pstr_inl
DC '???'
ld b,1
sub a
ret
disas_get_instrlen:
sub a
ld (isprefix_ixiy),a
ld a,(iy+000h)
cp 0edh
jr z,disas_pfx.ED
cp 0ddh
jr z,l19abh
cp 0fdh
jr z,l19afh
sub_19a0h:
ld a,(iy+000h)
cp 0cbh
jr z,disas_pfx.CB
jr disas_nopfx
l19abh:
ld a,1
jr l19b1h
l19afh:
ld a,2
l19b1h:
ld (isprefix_ixiy),a
call disas_pfx.DDFD
ret nc
push bc
call sub_19a0h
pop af
add a,b
ld b,a
scf
ret
;-------------------------------------------------------------------------------
disas_nopfx:
ld hl,b_1b54_start ;2 byte opcodes
call lookup_op_arg
ld b,2
ret c
ld hl,b_1ab6_start ;1 byte opcodes (no parameters)
call lookup_op
ld b,1
ret c
ld hl,b_1ad1_start ;1 byte opcodes
call lookup_op_arg
ld b,1
ret c
ld hl,b_1b9b_start ;3 byte opcodes
call lookup_op_arg
ld b,3
ret
;-------------------------------------------------------------------------------
disas_pfx.ED:
inc iy
ld hl,l228bh
call lookup_op_arg
ld b,3
ret c
ld hl,b_1c40_start
call lookup_op_arg
ld b,4
ret c
ld hl,b_1bc9_start ;1 byte opcode, no arguments
call lookup_op
jr c,da_ed1
ld hl,b_1bf4_start
call lookup_op_arg
ret nc
ld a,e
cp a_noarg
jr nz,da_ed0
ld c,(iy+0)
ld a,c
rra
and 0ch
ld b,a
ld a,c
and 03h
call str_sel_ab
da_ed0:
scf
da_ed1:
ld b,2
ret
;-------------------------------------------------------------------------------
disas_pfx.CB:
push iy
inc iy
ld a,(isprefix_ixiy)
and a
jr z,l1a42h
inc iy
l1a42h:
ld hl,b_1c55_start
call lookup_op_arg
pop iy
ld b,2
ret
;-------------------------------------------------------------------------------
disas_pfx.DDFD:
inc iy
ld hl,b_19ef_start
call test_DDFD
ld b,002h
ret c
ld hl,l1a0ah
call test_DDFD
ld b,001h
ret c
ld a,(iy+000h)
cp 0cbh
jr nz,l19edh
ld a,(iy+002h)
cp 036h
ret z
and 007h
cp 006h
jr nz,l19edh
ld b,002h
scf
ret
l19edh:
and a
ret
;-------------------------------------------------------------------------------
; DD/FD 3 byte (ix+d)/(iy+d)
b_19ef_start:
db 034h
db 035h
db 036h
db 046h
db 04eh
db 056h
db 05eh
db 066h
db 06eh
db 070h
db 071h
db 072h
db 073h
db 074h
db 075h
db 077h
db 07eh
db 086h
db 08eh
db 096h
db 09eh
db 0a6h
db 0aeh
db 0b6h
db 0beh
db 0
; DD/FD 2 byte
l1a0ah:
db 009h
db 019h
db 021h
db 022h
db 023h
db 029h
db 02ah
db 02bh
db 039h
db 0e1h
db 0e3h
db 0e5h
db 0e9h
db 0f9h
db 0
;-------------------------------------------------------------------------------
test_DDFD:
ld a,(hl)
and a
ret z
inc hl
cp (iy+000h)
jr nz,test_DDFD
scf
ret
lookup_op:
ld a,(hl)
inc hl
cp 0ffh
ret z
cp (iy+000h)
jr z,l1a7fh
inc hl
jr lookup_op
l1a7fh:
ld b,(hl)
ld e,a_noarg
jr get_mnemonic
lookup_op_arg:
call lookup_branch_op
ret nc
ld a,e
ld e,d
cp a,0ffh
ret z ;carry clear
ld b,a
get_mnemonic:
ld hl,t_MNEMONICS
bit 7,b
jr z,get_m1
res 7,b
ld a,(iy+000h)
rra
rra
rra
and 07h
str_sel_ab:
add b
ld b,a
get_m1:
call str_sel
scf
ret
lookup_branch_op ;TODO
ld a,(hl)
and a
ret z
inc hl
and (iy+000h)
cp (hl)
inc hl
jr z,l1aa8_br
inc hl
inc hl
jr lookup_branch_op
l1aa8_br:
ld e,(hl)
inc hl
ld d,(hl)
scf
ret
;-------------------------------------------------------------------------------
; 1 byte opcodes (no parameters)
; Format: db opcode, t_MNEMONICS-index
b_1ab6_start:
db 076h,i_HALT ;halt
db 0d9h,i_EXX ;exx
db 0f3h,i_DI ;di
db 0fbh,i_EI ;ei
db 000h,i_NOP ;nop
; db 007h,i_RLCA ;rlca
; db 00fh,i_RRCA ;rrca
; db 017h,i_RLA ;rla
; db 01fh,i_RRA ;rra
; db 027h,i_DAA ;daa
; db 02fh,i_CPL ;cpl
; db 037h,i_SCF ;scf
; db 03fh,i_CCF ;ccf
db 0c9h,i_RET ;ret
db 0ffh
; 1 byte opcodes
; Format: db mask, match, t_MNEMONICS-index
; dw argument formating function
b_1ad1_start:
db 0c0h,040h,i_LD ;ld r[y],r[z]
db a_rr
db 0c0h,080h,i_ADD+080h ;add a,r[z]
db a_r
; db 0f8h,080h,i_ADD ;add a,r[z]
; db a_ar
; db 0f8h,088h,i_ADC ;adc a,r[z]
; db a_ar
; db 0f8h,090h,i_SUB ;sub r[z]
; db a_r
; db 0f8h,098h,i_SBC ;sbc a,r[z]
; db a_ar
; db 0f8h,0a0h,i_AND ;and r[z]
; db a_r
; db 0f8h,0a8h,i_XOR ;xor r[z]
; db a_r
; db 0f8h,0b0h,i_OR ;or r[z]
; db a_r
; db 0f8h,0b8h,i_CP ;cp r[z]
; db a_r
db 0c7h,0c0h,i_RET ;ret cc
db a_cc
db 0c7h,0c7h,i_RST ;rst
db a_rst
db 0cfh,0c1h,i_POP ;pop rp2
db a_p2
db 0cfh,0c5h,i_PUSH ;push rp2
db a_p2
db 0ffh,0e3h,i_EX ;ex (sp),hl
db a_esphl
db 0ffh,0e9h,i_JP ;jp (hl)
db a_hl
db 0ffh,0ebh,i_EX ;ex de,hl
db a_dehl
db 0ffh,0f9h,i_LD ;ld sp,hl
db a_lsphl
db 0cfh,003h,i_INC ;inc rp
db a_p
db 0cfh,00bh,i_DEC ;dec rp
db a_p
db 0c7h,004h,i_INC ;inc r[y]
db a_ry
db 0c7h,005h,i_DEC ;dec r[y]
db a_ry
db 0ffh,008h,i_EX ;ex af,af'
db a_eaf
db 0cfh,009h,i_ADD ;add hl,rp
db a_hlp
db 0efh,002h,i_LD ;ld (rp),a ;rp=bc,de
db a_pa
db 0efh,00ah,i_LD ;ld a,(rp) ;rp=bc,de
db a_ap
db 0c7h,007h,i_RLCA+080h;rlca
db a_noarg
db 0
; 2 byte opcodes
b_1b54_start:
db 0c7h,006h,i_LD ;ld r[y],nn
db a_rn
db 0c7h,0c6h,i_ADD+080h ;add a,r[z]
db a_n
; db 0ffh,0c6h,i_ADD ;add a,nn
; db a_an
; db 0ffh,0ceh,i_ADC ;adc a,nn
; db a_an
; db 0ffh,0d6h,i_SUB ;sub nn
; db a_n
; db 0ffh,0deh,i_SBC ;sbc a,nn
; db a_an
; db 0ffh,0e6h,i_AND ;and nn
; db a_n
; db 0ffh,0eeh,i_XOR ;xor nn
; db a_n
; db 0ffh,0f6h,i_OR ;or nn
; db a_n
; db 0ffh,0feh,i_CP ;cp nn
; db a_n
db 0ffh,010h,i_DJNZ ;djnz
db a_j
db 0ffh,018h,i_JR ;jr
db a_j
db 0e7h,020h,i_JR ;jr cc,
db a_ccj
db 0ffh,0d3h,i_OUT ;out (nn),a
db a_ma
db 0ffh,0dbh,i_IN ;in a,(nn)
db a_am
db 0
; 3 byte opcodes
b_1b9b_start:
db 0c7h,0c2h,i_JP ;jp cc,mn
db a_ccnn
db 0c7h,0c4h,i_CALL ;call cc,mn
db a_ccnn
db 0cfh,001h,i_LD ;ld ww,mn
db a_rnn
db 0ffh,0c3h,i_JP ;jp mn
db a_nn
db 0ffh,0cdh,i_CALL ;call mn
db a_nn
db 0ffh,022h,i_LD ;ld (mn),hl
db a_mmhl
db 0ffh,02ah,i_LD ;ld hl,(mn)
db a_hlmm
db 0ffh,032h,i_LD ;ld (mn),a
db a_mma
db 0ffh,03ah,i_LD ;ld a,(mn)
db a_amm
db 0
; Prefix ED + 1 byte opcode, no arguments
; Format: opcode, t_MNEMONICS index
b_1bc9_start:
db 044h,i_NEG ;neg
db 045h,i_RETN ;retn
db 04dh,i_RETI ;reti
db 067h,i_RRD ;rrd
db 06fh,i_RLD ;rld
; db 0a0h,i_LDI ;ldi
; db 0a1h,i_CPI ;cpi
; db 0a2h,i_INI ;ini
; db 0a3h,i_OUTI ;outi
; db 0a8h,i_LDD ;ldd
; db 0a9h,i_CPD ;cpd
; db 0aah,i_IND ;ind
; db 0abh,i_OUTD ;outd
; db 0b0h,i_LDIR ;ldir
; db 0b1h,i_CPIR ;cpir
; db 0b2h,i_INIR ;inir
; db 0b3h,i_OTIR ;otir
; db 0b8h,i_LDDR ;lddr
; db 0b9h,i_CPDR ;cpdr
; db 0bah,i_INDR ;indr
; db 0bbh,i_OTDR ;otdr
db 08bh,i_OTDM ;otdm
db 09bh,i_OTDMR ;otdmr
db 083h,i_OTIM ;otim
db 093h,i_OTIMR ;otimr
db 076h,i_SLP ;slp
db 0ffh ;<end mark>
b_1bf4_start:
db 0e4h,0a0h,i_LDI
db a_noarg
db 0ffh,070h,i_IN ;in (c) ;
db a_c
db 0c7h,040h,i_IN ;in r,(c) ;r=b,c,d,e,h,l,a
db a_rc
db 0ffh,071h,0ffh ;out (c),0 ;
db a_cr
db 0c7h,041h,i_OUT ;out (c),r ;r=b,c,d,e,h,l,a
db a_cr
db 0cfh,042h,i_SBC ;sbc hl,rp
db a_hlp
db 0cfh,04ah,i_ADC ;adc hl,rp
db a_hlp
db 0ffh,046h,i_IM ;im 0
db a_im0
db 0ffh,056h,i_IM ;im 1
db a_im1
db 0ffh,05eh,i_IM ;im 2
db a_im2
db 0e7h,047h,i_LD ;ld i,a ... ld a,r
db a_ai
db 0cfh,04ch,i_MLT ;mlt rr
db a_p
db 0c7h,004h,i_TST ;tst r
db a_ry
db 0
l228bh:
db 0ffh,030h,i_IN0 ;in0 (m)
db a_m
db 0c7h,000h,i_IN0 ;in0 r,(m) ;r=b,c,d,e,h,l,a
db a_rm
db 0ffh,031h,0ffh ;out0 (m),0
db a_mr
db 0c7h,001h,i_OUT0 ;out0 (m),r ;r=b,c,d,e
db a_mr
db 0ffh,064h,i_TST ;tst m
db a_n
db 0ffh,074h,i_TSTIO ;tstio m
db a_n
db 0
; Prefix ED + 1 byte opcode + 2 byte address
; Format: db mask, match, t_MNEMONICS-index
; dw argument formating function
b_1c40_start:
db 0cfh,043h,i_LD ;ld (mn),ww ;ww=bc,de,hl,sp
db a_mmp
db 0cfh,04bh,i_LD ;ld ww,(mn) ;ww=bc,de,hl,sp
db a_pmm
db 0
; CB
b_1c55_start:
db 0c0h,000h,i_RLC+080h ;rlc g
db a_cbr
; db 0f8h,000h,i_RLC ;rlc g
; db a_cbr
; db 0f8h,008h,i_RRC ;rrc g
; db a_cbr
; db 0f8h,010h,i_RL ;rl g
; db a_cbr
; db 0f8h,018h,i_RR ;rr g
; db a_cbr
; db 0f8h,020h,i_SLA ;sla g
; db a_cbr
; db 0f8h,028h,i_SRA ;sra g
; db a_cbr
; db 0f8h,038h,i_SRL ;srl g
; db a_cbr
db 0c0h,040h,i_BIT ;bit b,g
db a_bcbr
db 0c0h,080h,i_RES ;res b,g
db a_bcbr
db 0c0h,0c0h,i_SET ;set b,g
db a_bcbr
db 0
;-------------------------------------------------------------------------------
;-------------------------------------------------------------------------------
pr_instr_args:
ld hl,t_argf
ld d,0
add hl,de
pria_l:
ld a,(hl) ;get next token
inc hl
or a
ret z ;
jp m,pria_1
call outchar ;print as normal character
jr pria_l
pria_1: ;
push hl
ld hl,do_arg_n
and 07fh
call add_hl_a2
ld a,(hl)
inc hl
ld h,(hl)
ld l,a
ld a,(iy+000h)
call CALL_HL
pop hl
jr pria_l
;
; http://www.z80.info/decoding.htm
;
; | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
; | x | y | z |
; | p | q |
;
t_argf:
; 1 byte opcodes
a_rr equ $-t_argf
db fi_ry,',' ;ld r[y],r[z]
a_r equ $-t_argf
db fi_rz,0 ;op r[z]
;a_ar equ $-t_argf
; db 'A,',fi_rz,0 ;op A,r[z]
a_cc equ $-t_argf
db fi_ccy,0 ;op cc[y]
a_rst equ $-t_argf
db fi_rst,0 ;rst y*8
a_p2 equ $-t_argf
db fi_rp2,0 ;rp2[p]
a_esphl equ $-t_argf
db '(SP),',fi_hlixiy,0 ;ex (sp),hl
a_hl equ $-t_argf
db '(',fi_hlixiy,')',0 ;jp (hl)
a_dehl equ $-t_argf
db 'DE,HL',0
a_lsphl equ $-t_argf
db 'SP,',fi_hlixiy,0 ;ld SP,HL
a_eaf equ $-t_argf
db 'AF,AF''',0 ;ex af,af'
a_hlp equ $-t_argf
db fi_hlixiy,',' ;add hl,rp
a_p equ $-t_argf
db fi_rp,0 ;rp[p]
a_pa equ $-t_argf
db '(',fi_rp,'),A',0 ;ld (rp),a ;rp=bc,de
a_ap equ $-t_argf
db 'A,(',fi_rp,')',0 ;ld a,(rp) ;rp=bc,de
; 2 byte opcodes
a_rn equ $-t_argf
db fi_ry,',',fi_n,0 ;ld r[y],n
;a_an equ $-t_argf
; db 'A,' ;op a,n
a_n equ $-t_argf
db fi_n,0 ;op n
a_ccj equ $-t_argf
db fi_ccy2,',' ;jr cc,j ;cc = nz,z,nc,c
a_j equ $-t_argf
db fi_j,0 ;jr j
a_ma equ $-t_argf
db '(',fi_n,'),A',0 ;out (n),a
a_am equ $-t_argf
db 'A,(',fi_n,')',0 ;in a,(n)
; 3 byte opcodes
a_ccnn equ $-t_argf
db fi_ccy,',',fi_nn,0 ;op cc[y],nn
a_rnn equ $-t_argf
db fi_rp,',' ;ld rp[p],nn
a_nn equ $-t_argf
db fi_nn,0 ;jp nn
a_mmhl equ $-t_argf
db '(',fi_nn,'),',fi_hlixiy,0 ;ld (nn),hl
a_hlmm equ $-t_argf
db fi_hlixiy,',(',fi_nn,')',0 ;ld hl,(nn)
a_mma equ $-t_argf
db '(',fi_nn,'),A',0 ;ld (nn),a
a_amm equ $-t_argf
db 'A,(',fi_nn,')',0 ;ld a,(nn)
; Prefix ED + 1 byte opcode
a_rc equ $-t_argf
db fi_ry,',' ;in r[y],(c)
a_c equ $-t_argf
db '(C)',0 ;in (c)
a_cr equ $-t_argf
db '(C),' ;out (c),r[y]
a_ry equ $-t_argf
db fi_ry,0 ;inc r[y]
a_im0 equ $-t_argf
db '0',0 ;im 0
a_im1 equ $-t_argf
db '1',0 ;im 1
a_im2 equ $-t_argf
db '2',0 ;im 2
a_ai equ $-t_argf
db fi_ir,0 ;ld a,i ... r,a
; Prefix ED + 2 byte (opcode + immediate)
a_rm equ $-t_argf
db fi_ry,',' ;in0 r[y],(n)
a_m equ $-t_argf
db '(',fi_n,')',0 ;in0 (n)
a_mr equ $-t_argf
db '(',fi_n,'),',fi_ry,0 ;out0 (n),r[y]
; Prefix ED + 3 byte (opcode + address)
a_mmp equ $-t_argf
db '(',fi_nn,'),',fi_rp,0 ;ld (nn),rp
a_pmm equ $-t_argf
db fi_rp,',(',fi_nn,')',0 ;ld rp,(nn)
; Prefix CB + 1 byte opcode
a_bcbr equ $-t_argf
db fi_y,',' ;op y,r[z]
a_cbr equ $-t_argf
db fi_rz_cb,0 ;op r[z]
a_noarg equ $-t_argf
db 0
;-------------------------------------------------------------------------------
argpf_index defl 0
argpf macro x
fi_&x equ 80h+argpf_index
dw p_&x
argpf_index defl argpf_index+1
endm
do_arg_n:
argpf ry
argpf rz
argpf ccy
argpf ccy2
argpf rst
argpf rp
argpf rp2
argpf hlixiy
argpf n
argpf j
argpf nn
argpf ir
argpf rz_cb
argpf y
p_n:
ld a,(isprefix_ixiy)
and a
ld a,(iy+001h)
jr z,out_hex_0
ld a,(iy+002h)
jr out_hex_0
p_rst:
and 038h
out_hex_0:
jp out_hex
p_j:
ld c,(iy+001h)
ld a,c
rla
sbc a,a
ld b,a
push iy
pop hl
add hl,bc
inc hl
inc hl
jr out_hl_0
p_nn:
ld l,(iy+001h)
ld h,(iy+002h)
out_hl_0:
jp out_hl
p_ir:
rra
rra
rra
and 03
ld hl,t_arg_IR
jr p_arg
get_cb_opc:
ld a,(isprefix_ixiy)
and a
ld a,(iy+001h)
ret z
ld a,(iy+002h)
ret
p_y:
call get_cb_opc
rra
rra
rra
and 007h
jp out_dgt
p_rz_cb:
call get_cb_opc
jr p_rz
p_ry:
rra
rra
rra
p_rz:
and 007h
cp 006h
ld b,a
ld hl,t_arg_r
jr nz,p_arg0
ld a,(isprefix_ixiy)
and a
jr z,p_arg0
ld hl,t_lp_IXIY
dec a
call p_arg
ld a,(iy+001h)
push af
rlca
ld a,'+'
jr nc,l1e61h
pop af
neg
push af
ld a,'-'
l1e61h:
call outchar
pop af
call out_hex
ld a,')'
jp outchar
p_rp2:
ld hl,t_arg_rp2
db 0ddh ;swallow t_arg_rp in ix
p_rp:
ld hl,t_arg_rp
rra
rra
rra
rra
and 003h
cp 002h
jr nz,p_arg
p_hlixiy:
ld a,(isprefix_ixiy)
ld hl,t_HL.IX.IY
jr p_arg
p_ccy2:
and 018h
p_ccy:
rra
rra
rra
and 007h
ld hl,t_arg_cc
p_arg:
ld b,a
p_arg0:
;fall thru
pstr_sel:
call str_sel
;fall thru
pstr:
ld a,(hl)
inc hl
and a
ret z
call outchar
ret m
jr pstr
pstr_inl:
ex (sp),hl
call pstr
ex (sp),hl
ret
;-------------------------------------------------------------------------------
opc macro x
i_&x equ opc_index
;o_&x equ $-opc_tabstart
dc '&x'
opc_index defl opc_index+1
endm
t_MNEMONICS:
;opc_tabstart defl $
opc_index defl 0
; 1-byte other
opc NOP
opc LD
opc INC
opc DEC
opc DJNZ
opc JR
opc HALT
opc RLCA
opc RRCA
opc RLA
opc RRA
opc DAA
opc CPL
opc SCF
opc CCF
; 1-byte "alu"
opc ADD
opc ADC
opc SUB
opc SBC
opc AND
opc XOR
opc OR
opc CP
opc RET
opc POP
opc JP
opc CALL
opc PUSH
opc RST
opc OUT
opc EXX
opc IN
opc EX
opc DI
opc EI
; CB
opc RLC
opc RRC
opc RL
opc RR
opc SLA
opc SRA
opc SLL
opc SRL
opc BIT
opc RES
opc SET
; ED
opc NEG
opc RETN
opc RETI
opc IM
opc RRD
opc RLD
; Block instructions
opc LDI
opc CPI
opc INI
opc OUTI
opc LDD
opc CPD
opc IND
opc OUTD
opc LDIR
opc CPIR
opc INIR
opc OTIR
opc LDDR
opc CPDR
opc INDR
opc OTDR
; Z180
opc IN0
opc OUT0
opc TST
opc MLT
opc TSTIO
opc SLP
opc OTIM
opc OTDM
opc OTIMR
opc OTDMR
DB 0
t_arg_r:
DC 'B'
DC 'C'
DC 'D'
DC 'E'
DC 'H'
DC 'L'
DC '(HL)'
DC 'A'
DB 0
t_arg_rp:
DC 'BC'
DC 'DE'
DC 'HL'
DC 'SP'
DB 0
t_arg_rp2:
DC 'BC'
DC 'DE'
DC 'HL'
DC 'AF'
DB 0
t_HL.IX.IY:
DC 'HL'
DC 'IX'
DC 'IY'
DB 0
t_arg_cc:
DC 'NZ'
DC 'Z'
DC 'NC'
DC 'C'
DC 'PO'
DC 'PE'
DC 'P'
DC 'M'
DB 0
t_lp_IXIY:
DC '(IX'
DC '(IY'
t_arg_IR:
DC 'I,A'
DC 'R,A'
DC 'A,I'
DC 'A,R'
db 0
;-------------------------------------------------------------------------------
tc_set_bp:
ld hl,(reg.pc)
ld a,h
or l
jr z,l2037h
ld de,BDOS
and a
sbc hl,de
ld hl,l20edh ;set break after BDOS call
jr z,l2031h
ld iy,(reg.pc)
call disas_get_instrlen
jp nc,ERROR
ld c,b
ld b,0
ld hl,(reg.pc)
add hl,bc
call bp_trace_enter
ld iy,(reg.pc)
ld hl,t_op_branch
call lookup_branch_op
ccf
ret c
ex de,hl
l2031h:
call CALL_HL
call c,bp_trace_enter
l2037h:
scf
ret
;-------------------------------------------------------------------------------
t_op_branch:
db 0ffh,0ddh ;Prefix DD
dw l20a7h
db 0ffh,0fdh ;Prefix FD
dw l20ach
db 0ffh,0edh ;Prefix ED
dw l20b8h
db 0ffh,0cdh ;call mn
dw l2080h
db 0ffh,0c3h ;jp mn
dw l208bh
db 0ffh,0e9h ;jp ()
dw l20a2h
db 0ffh,0c9h ;ret
dw l20dch
db 0ffh,0cfh ;rst 8
dw l2115h
db 0c7h,0c7h ;rst n
dw l20f9h
db 0c7h,0c4h ;call cc,mn
dw l2080h
db 0f7h,010h ;djnz d; jr d
dw l2093h
db 0e7h,020h ;jr cc,d
dw l2093h
db 0c7h,0c2h ;jp cc,mn
dw l208bh
db 0c7h,0c0h ;ret cc
dw l20c5h
db 0
;-------------------------------------------------------------------------------
; call mn call cc,mn
l2080h:
; jp mn jp cc,mn
l208bh:
ld l,(iy+001h)
ld h,(iy+002h)
scf
ret
l2093h:
ld c,(iy+001h)
ld a,c
rla
sbc a,a
ld b,a
ld hl,(reg.pc)
add hl,bc
inc hl
inc hl
scf
ret
; jp (hl)
l20a2h:
ld hl,(reg.l)
scf
ret
; Prefix DD
l20a7h:
ld hl,(reg.ix)
jr l20afh
; Prefix FD
l20ach:
ld hl,(reg.iy)
l20afh:
ld a,(iy+001h)
cp 0e9h ; jp (ix); jp (iy)
scf
ret z
and a
ret
; Prefix ED
l20b8h:
ld a,(iy+001h)
cp 04dh ; reti
jr z,l20dch
cp 045h ; retn
jr z,l20dch
and a
ret
l20c5h:
ld a,(iy+000h)
ld (l20d7h),a
ld hl,(reg.f)
push hl
pop af
call l20d7h
scf
jr c,l20dch
ret
l20d7h:
nop
and a
pop hl
inc hl
jp (hl)
l20dch:
l20edh:
ld hl,(reg_sp) ;break on return address
ld e,(hl)
inc hl
ld d,(hl)
ex de,hl
call bp_trace_enter
l2115h:
and a
ret
l20f9h:
ld a,(l0003h)
cp (iy+000h)
ret z
ld a,(iy+000h)
and 038h
ld l,a
ld h,000h
ld a,(b_21e2_start)
and a
ret z
scf
ret
;-------------------------------------------------------------------------------
; >>C[N][J] [steps]
; >>C[N][J] W expression
; >>C[N][J] U expression
; trace over Calls [No list] [Jumps only] /.While./.Until.
;-------------------------------------------------------------------------------
; >>T[N][J] [steps]
; >>T[N][J] W expression
; >>T[N][J] U expression
; Trace [no List] [Jumps only] / .While. / .Until.
cmd_T:
ld (cmd_rpt),hl
ld hl,1 ;default: 1 step
call get_lastarg_def
ld (trace_cnt_or_ptr),hl
sub a
ld (bp_p_cpu_flag),a
call tc_set_bp
jr user_go1
l2151h:
call bp_clr_temporary
ld hl,(trace_cnt_or_ptr)
dec hl
ld (trace_cnt_or_ptr),hl
ld a,h
or l
jp z,do_break
call tc_set_bp
jp nc,do_break
sbc a,a
ld (bp_p_cpu_flag),a
user_go1:
jp user_go
;-------------------------------------------------------------------------------
con_col:
db 0
;-------------------------------------------------------------------------------
b_21e2_start:
db 0
trace_cnt_or_ptr:
dw 0
bp_p_cpu_flag:
db 0
bp_tab:
rept BP_CNT
rept BP_SIZE
db 0
endm
endm
;-------------------------------------------------------------------------------
last_S:
dw TPA
last_I:
dw 0
last_O_addr:
dw 0
last_O_val:
db 0
last_D:
dw TPA
high_load:
dw TPA
max_load:
dw TPA
isprefix_ixiy:
db 0
last_L:
dw TPA
pbl_loop_adr:
dw 0addeh
;-------------------------------------------------------------------------------
conbuf::
ds CONBUF_SIZE+1
;-------------------------------------------------------------------------------
rept (STACK_SIZE+3)/4
db 0deh,0adh,0beh,0efh
endm
stack::
reg.l2: db 000h
reg.h2: db 000h
reg.e2: db 000h
reg.d2: db 000h
reg.c2: db 000h
reg.b2: db 000h
reg.f2: db 000h
reg.a2: db 000h
db 000h
reg.i: db 000h
reg.iy: dw 0000h
reg.ix: dw 0000h
reg.f: db 000h
reg.a: db 000h
reg.c: db 000h
reg.b: db 000h
reg.e: db 000h
reg.d: db 000h
reg.l: db 000h
reg.h: db 000h
reg_sp: dw TPA
reg.iff:
db 0f3h
db 0c3h
reg.pc: dw TPA
cmd_rpt:dw mainloop
;-------------------------------------------------------------------------------
ddtz_size equ $-ddtz_base
prog_size equ $-start
ddtz_end::
;-------------------------------------------------------------------------------
end
|