mirror of https://github.com/a2-4am/4cade.git
46 lines
934 B
Plaintext
46 lines
934 B
Plaintext
;license:MIT
|
|
;(c) 2020, 2022, 2023 by Frank M., qkumba
|
|
|
|
!cpu 6502
|
|
!to "build/PRELAUNCH.INDEXED/FLAPPLE.BIRD",plain
|
|
*=$106
|
|
|
|
!source "src/prelaunch/common.a"
|
|
|
|
+ENABLE_ACCEL
|
|
lda #$60
|
|
sta $813
|
|
jsr $800
|
|
+READ_RAM1_NO_WRITE
|
|
lda WaitForVBL
|
|
eor #$60
|
|
bne @good_vbl ; if VBL disabled in TR
|
|
sta $2971 ; then disable VBL in game
|
|
|
|
@good_vbl
|
|
+DISABLE_ACCEL
|
|
lda $fbb3
|
|
cmp #$6
|
|
bne @not_mac
|
|
lda $fbc0
|
|
cmp #$e0
|
|
bne @not_mac
|
|
lda $fbdd
|
|
cmp #$02
|
|
bne @not_mac
|
|
+READ_RAM2_WRITE_RAM2
|
|
+LOAD_FILE_AT flapple_mac, $b000
|
|
jsr $b000
|
|
+READ_ROM_NO_WRITE
|
|
|
|
@not_mac
|
|
jmp $2000
|
|
|
|
flapple_mac
|
|
!byte 21
|
|
!text "PRELAUNCH/FLAPPLE.MAC"
|
|
|
|
!if * > $1C0 {
|
|
!error "code is too large, ends at ", *
|
|
}
|