4cade/src/demo/thunder.bombs.a
frankmilliron d6f69d0926
Thunder Bombs demo, fix Space Quarks (#417)
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* Delete THUNDER.1
2021-11-02 00:53:24 -04:00

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;license:MIT
;(c) 2021 by Frank M.
!cpu 6502
!to "res/DEMO/THUNDER.BOMBS",plain
*=$B000
!source "src/constants.a" ; no code in these
!source "src/macros.a"
+READ_RAM2_WRITE_RAM2
;+LOAD_FILE_KEEP_DIR
ldx #0 ; read to main memory
stx ldrhi
stx ldrlo
+LDADDR title
jsr iLoadFileDirect
+READ_ROM_NO_WRITE
ldx #16-1 ; we also need to copy the length byte
- lda newpath,x
sta $BFD0,x
dex
bpl -
lda #$60
sta $887F
lda #$4C
sta $8819
lda #<callback
sta $8819+1
lda #>callback
sta $8819+2
jsr $87F9 ; load/title
lda #$60
sta $7818
jsr $7800 ; unpack/setup
lda #0
sta $3F2 ; reset vector
lda #$4C
sta $789B
sta $78CB
sta $7A8C
sta $7837
lda #0
sta $789B+1
sta $78CB+1
sta $7A8C+1
sta $7837+1
lda #1
sta $789B+2
sta $78CB+2
sta $7A8C+2
sta $7837+2 ; set exits
lda $323
jmp $781B
callback bit $C000
ldx #$30
- bit $C055
lda #$0B
jsr $FCA8
bit $C054
lda #$0B
jsr $FCA8
bit $C000
bmi exit
dey
bne -
dex
bne -
jmp $8839
exit jmp $100
newpath
!byte 15
!text "X/THUNDER.BOMBS"
title !byte x_e-x_b
x_b !text "X/THUNDER.BOMBS/THUNDER.BOMBS"
x_e
!if * > $B100 {
!error "code is too large, ends at ", *
}