mirror of https://github.com/a2-4am/4cade.git
87 lines
1.7 KiB
Plaintext
87 lines
1.7 KiB
Plaintext
;license:MIT
|
|
;(c) 2021 by Frank M.
|
|
|
|
!cpu 6502
|
|
!to "res/DEMO/BATTLEZONE",plain
|
|
*=$300
|
|
|
|
!source "src/constants.a" ; no code in these
|
|
!source "src/macros.a"
|
|
|
|
+READ_RAM2_WRITE_RAM2
|
|
;jsr EnableAccelerator
|
|
+LOAD_FILE_AT title, $00
|
|
+READ_ROM_NO_WRITE
|
|
|
|
lda #$60
|
|
sta $201e
|
|
jsr $2000 ; decompress
|
|
|
|
lda #0
|
|
sta $0811
|
|
lda #1
|
|
sta $0816 ; reset vector patch
|
|
|
|
lda #$EA
|
|
sta $1632
|
|
sta $1632+1
|
|
sta $1632+2 ; disable clearing keyboard strobe
|
|
|
|
lda #$4C
|
|
sta $0872
|
|
sta $161A
|
|
sta $7661
|
|
sta $766C
|
|
sta $7693
|
|
sta $0B6A
|
|
sta $73A7
|
|
sta $168F+4
|
|
lda #0
|
|
sta $0872+1
|
|
sta $161A+1
|
|
sta $7661+1
|
|
sta $766C+1
|
|
sta $7693+1
|
|
sta $0B6A+1
|
|
sta $73A7+1
|
|
sta $168F+5
|
|
lda #1
|
|
sta $0872+2
|
|
sta $161A+2
|
|
sta $7661+2
|
|
sta $766C+2
|
|
sta $7693+2
|
|
sta $0B6A+2
|
|
sta $73A7+2
|
|
sta $168F+6
|
|
lda #$C9
|
|
sta $168F
|
|
lda #$FF
|
|
sta $168F+1
|
|
lda #$F0
|
|
sta $168F+2
|
|
lda #$16
|
|
sta $168F+3 ; set exits
|
|
|
|
lda #$D0
|
|
sta $7733
|
|
sta $774D
|
|
sta $78B8
|
|
sta $78BB
|
|
sta $7815
|
|
sta $5180
|
|
sta $5576
|
|
sta $0B8E ; disable sound
|
|
|
|
;+DISABLE_ACCEL
|
|
|
|
jmp $810
|
|
|
|
title !byte x_e-x_b
|
|
x_b !text "X/BATTLEZONE/BATTLEZONE"
|
|
x_e
|
|
|
|
!if * > $3F0 {
|
|
!error "code is too large, ends at ", *
|
|
}
|