4cade/src/prelaunch/battlezone.a

33 lines
728 B
Plaintext
Executable File

;license:MIT
;(c) 2019 by qkumba/Frank M.
!cpu 6502
!to "build/PRELAUNCH.INDEXED/BATTLEZONE",plain
*=$106
!source "src/prelaunch/common.a"
+ENABLE_ACCEL
lda #$60
sta $201e
jsr $2000 ; decompress
+GET_MACHINE_STATUS
and #CHEATS_ENABLED
beq +
lda #$b9
sta $7364 ; patch - don't decrease lives
sta $719c ; patch - don't increase lives
sta $71ba ; patch - don't increase lives
+
lda #0
sta $0811
lda #1
sta $0816 ; reset vector patch
+DISABLE_ACCEL
jmp $810
!if * > $1C0 {
!error "code is too large, ends at ", *
}