4cade/src/prelaunch/defender.a

32 lines
697 B
Plaintext
Executable File

;license:MIT
;(c) 2019 by 4am/Frank M.
!cpu 6502
!to "build/PRELAUNCH.INDEXED/DEFENDER",plain
*=$106
!source "src/prelaunch/common.a"
+ENABLE_ACCEL
lda #$60
sta $0813
jsr $0800 ; decompress
+GET_MACHINE_STATUS
and #CHEATS_ENABLED
beq +
; lives in $9E
lda #$A5
sta $7579 ; patch - don't decrease lives
sta $6567 ; patch - don't increase lives
+
lda #$EA
sta $4045
sta $4046 ; reset vector patch
+DISABLE_ACCEL
jmp $4000
!if * > $1C0 {
!error "code is too large, ends at ", *
}