mirror of https://github.com/a2-4am/4cade.git
79 lines
1.6 KiB
Plaintext
79 lines
1.6 KiB
Plaintext
;license:MIT
|
|
;(c) 2022 by qkumba
|
|
|
|
!cpu 6502
|
|
!to "res/DEMO/SERPENTINE",plain
|
|
*=$300
|
|
|
|
!source "src/constants.a" ; no code in these
|
|
!source "src/macros.a"
|
|
|
|
+READ_RAM2_WRITE_RAM2
|
|
jsr EnableAccelerator
|
|
reset
|
|
+LOAD_FILE_KEEP_DIR serpentine, $43F5, serpentine_dir_e-serpentine_dir_b
|
|
+READ_ROM_NO_WRITE
|
|
+NEW_RESET_VECTOR reset
|
|
lda #<callback1
|
|
sta $8C55
|
|
lda #>callback1
|
|
sta $8C56
|
|
jmp $43F5
|
|
|
|
callback1
|
|
stx $00
|
|
lda #$20
|
|
sta $01
|
|
lda #$CF
|
|
sta $02
|
|
lda #$83
|
|
sta $03
|
|
lda #<callback2
|
|
sta $237
|
|
lda #>callback2
|
|
sta $238
|
|
jmp $8C5A ; decompress
|
|
|
|
callback2
|
|
lda #$4C
|
|
sta $96AA
|
|
sta $8834
|
|
lda #$A9
|
|
sta $9702
|
|
sta $9707
|
|
sta $91B
|
|
sta $920
|
|
lda #<reset
|
|
sta $96AB
|
|
sta $8835
|
|
lda #0
|
|
sta $9703
|
|
sta $9708
|
|
sta $91C
|
|
sta $921
|
|
lda #>reset
|
|
sta $96AC
|
|
sta $8836
|
|
lda #$EA
|
|
sta $9704
|
|
sta $9709
|
|
sta $91D
|
|
sta $922
|
|
lda #$D0
|
|
sta $962D
|
|
+DISABLE_ACCEL
|
|
jmp $800
|
|
|
|
serpentine
|
|
!byte serpentine_e-serpentine_b
|
|
serpentine_b
|
|
serpentine_dir_b
|
|
!text "X/SERPENTINE"
|
|
serpentine_dir_e
|
|
!text "/SERPENTINE"
|
|
serpentine_e
|
|
|
|
!if * > $3F0 {
|
|
!error "code is too large, ends at ", *
|
|
}
|