mirror of
https://github.com/a2-4am/4cade.git
synced 2024-08-14 14:29:06 +00:00
205 lines
3.8 KiB
ArmAsm
Executable File
205 lines
3.8 KiB
ArmAsm
Executable File
!cpu 6502
|
|
!to "callback#061000",plain
|
|
*=$1000
|
|
|
|
WILDCARD = $97
|
|
BASEPAGE = $D0
|
|
|
|
lda $c08b
|
|
lda $c08b
|
|
ldy #$0D
|
|
jsr SearchTrack
|
|
!byte $BD,$10,$BF ;LDA $BF10,X
|
|
!byte $8D,WILDCARD,WILDCARD ;STA $xxxx,X
|
|
!byte $BD,$11,$BF ;LDA $BF11,X
|
|
!byte $8D,WILDCARD,WILDCARD ;STA $xxxx,X
|
|
!byte $6C
|
|
bcs .exit
|
|
adc #BASEPAGE
|
|
sta patch1+2
|
|
sta patch2+2
|
|
|
|
ldy #(callback_e-callback_b)-1
|
|
- lda callback_b,y
|
|
sta callback,y
|
|
dey
|
|
bpl -
|
|
|
|
txa
|
|
adc #$0E
|
|
tax
|
|
|
|
ldy #2
|
|
-
|
|
patch1 lda $d100,x
|
|
sta jmpback,y
|
|
lda hookme,y
|
|
patch2 sta $d100,x
|
|
dex
|
|
dey
|
|
bpl -
|
|
.exit
|
|
lda $c082
|
|
bcs ++
|
|
ldy #0
|
|
beq +
|
|
- jsr $FDED
|
|
iny
|
|
+ lda installed,y
|
|
bne -
|
|
++ rts
|
|
|
|
hookme jmp callback
|
|
|
|
installed
|
|
!text "INSTALLED"
|
|
!byte $8D,00
|
|
|
|
callback_b
|
|
!pseudopc $300 {
|
|
callback lda $c081
|
|
lda #$D2
|
|
jsr $FDED
|
|
lda $c08b
|
|
lda $c000
|
|
bpl +
|
|
sec ;error is pressed key
|
|
rts
|
|
+
|
|
jmpback ;!byte $d1,$d1,$d1
|
|
}
|
|
callback_e
|
|
|
|
SearchTrack
|
|
;set end point for the search
|
|
|
|
lda #$E0
|
|
sta .endvalue+1
|
|
lda #$D0
|
|
|
|
; set high part of initial search position
|
|
|
|
sta search+2
|
|
pla
|
|
sta match_buffer1+1
|
|
sta match_all+1
|
|
pla
|
|
sta match_buffer1+2
|
|
sta match_all+2
|
|
tax
|
|
sty match_size1+1
|
|
sty match_size2+1
|
|
|
|
; fetch last byte to improve search speed
|
|
|
|
match_buffer1
|
|
lda $d1d1,y ; modified at runtime
|
|
sta check_byte1+1
|
|
sta check_byte2+1
|
|
|
|
; set low part of initial search position
|
|
|
|
tya
|
|
dey
|
|
sty cont_search+1
|
|
|
|
; set return address
|
|
|
|
clc
|
|
adc match_buffer1+1
|
|
tay
|
|
bcc plus01
|
|
inx
|
|
plus01
|
|
txa
|
|
pha
|
|
tya
|
|
pha
|
|
|
|
; set match position
|
|
|
|
inc match_all+1
|
|
bne plus02
|
|
inc match_all+2
|
|
plus02
|
|
|
|
lda #<cont_search-branch_cont-2
|
|
sta branch_cont+1
|
|
|
|
; search...
|
|
|
|
cont_search
|
|
ldy #$d1 ; modified at runtime
|
|
|
|
search
|
|
lda $d100,y ; modified at runtime
|
|
iny
|
|
beq check_end
|
|
|
|
check_byte1
|
|
cmp #$d1 ; modified at runtime
|
|
bne search
|
|
|
|
; point to first byte
|
|
|
|
sty cont_search+1
|
|
|
|
check_match
|
|
tya
|
|
|
|
match_size1
|
|
sbc #$d1 ; modified at runtime
|
|
sta match_buffer2+1
|
|
ldx search+2
|
|
bcs plus03
|
|
dex
|
|
plus03
|
|
stx match_buffer2+2
|
|
ldy #$00
|
|
|
|
match_all
|
|
lda $d1d1,y ; modified at runtime
|
|
cmp #WILDCARD
|
|
beq found_wild
|
|
|
|
match_buffer2
|
|
cmp $d1d1,y ; modified at runtime
|
|
|
|
branch_cont
|
|
bne cont_search
|
|
|
|
found_wild
|
|
iny
|
|
|
|
match_size2
|
|
cpy #$d1 ; modified at runtime
|
|
bne match_all
|
|
|
|
; point to start of match
|
|
|
|
ldx match_buffer2+1
|
|
lda match_buffer2+2
|
|
sec
|
|
sbc #BASEPAGE
|
|
clc
|
|
rts
|
|
|
|
; cold path
|
|
|
|
check_end
|
|
inc search+2
|
|
ldx search+2
|
|
.endvalue
|
|
cpx #$D1
|
|
bne check_byte1
|
|
ldx #<all_done_set-branch_cont-2
|
|
stx branch_cont+1
|
|
|
|
check_byte2
|
|
cmp #$d1 ; modified at runtime
|
|
beq check_match
|
|
|
|
all_done_set
|
|
sec
|
|
rts
|