mirror of https://github.com/a2-4am/4cade.git
58 lines
1.1 KiB
Plaintext
58 lines
1.1 KiB
Plaintext
;license:MIT
|
|
;(c) 2021-2022 by Frank M., qkumba
|
|
|
|
!cpu 6502
|
|
!to "build/DEMO/PITFALL.II#060300",plain
|
|
*=$300
|
|
|
|
!source "src/constants.a" ; no code in these
|
|
!source "src/macros.a"
|
|
|
|
+GAME_REQUIRES_JOYSTICK
|
|
+ENABLE_ACCEL_LC
|
|
+LOAD_XSINGLE title
|
|
|
|
lda #$60
|
|
sta $3D34
|
|
jsr $0800 ; decompress
|
|
|
|
+RESET_VECTOR reset
|
|
ldx #3-1
|
|
- lda patch,x
|
|
sta $6015,x
|
|
dex
|
|
bpl -
|
|
|
|
+DISABLE_ACCEL
|
|
|
|
jmp $6000 ;612A copies pages 2E & 2F to AE & AF for final location
|
|
|
|
patch !byte $20,<callback,>callback
|
|
|
|
reset
|
|
+READ_RAM2_NO_WRITE
|
|
jmp ($FFFC)
|
|
|
|
callback
|
|
ldx #6-1
|
|
p1 lda $100, x
|
|
sta $6055, x
|
|
sta $AB43, x
|
|
dex
|
|
bpl p1 ; set demo exits
|
|
|
|
lda #$BF
|
|
sta $6021 ; reduce time before demo starts
|
|
|
|
lda #$D0
|
|
sta $6299 ; don't lose keypress on return
|
|
jmp $ADE0
|
|
|
|
title !byte x_e-x_b
|
|
x_b !text "PITFALL.II"
|
|
x_e
|
|
|
|
!if * > $3F0 {
|
|
!error "code is too large, ends at ", *
|
|
}
|