diff options
| author | Alexey 'Cluster' Avdyukhin <clusterrr@clusterrr.com> | 2022-10-25 21:10:28 +0300 |
|---|---|---|
| committer | Alexey 'Cluster' Avdyukhin <clusterrr@clusterrr.com> | 2022-10-25 21:10:28 +0300 |
| commit | 7d9a2c38d508a593a255c994c6025fcf1fe33d07 (patch) | |
| tree | 82641c7cc84273b8b0815071c6a5694f490dff1c | |
| parent | 1a41385c7f52ea66c3c20e93a37557865e125021 (diff) | |
Sample fix
| -rw-r--r-- | Samples/sprites8x16/main.asm | 302 |
1 files changed, 151 insertions, 151 deletions
diff --git a/Samples/sprites8x16/main.asm b/Samples/sprites8x16/main.asm index 2c2a584..2217ece 100644 --- a/Samples/sprites8x16/main.asm +++ b/Samples/sprites8x16/main.asm @@ -1,151 +1,151 @@ - ; INES header stuff - .inesprg 1 ; 1 bank of PRG - .ineschr 1 ; 1 bank of CHR data - .inesmir 0 ; mirroring - .inesmap 0 ; we use mapper 0 - - .rsset $0000 ; variables -COPY_SOURCE_ADDR .rs 2 -COPY_DEST_ADDR .rs 2 - .rsset $0200 -SPRITES .rs 256 - - .bank 1 - .org $FFFA ; reset vectors - .dw NMI - .dw Start - .dw IRQ - - .bank 0 - .org $C000 ; code starts here -Start: - ; disable interrupts - sei - ; reset stack - ldx #$ff - txs - - ; disable PPU - lda #%00000000 - sta PPUCTRL - lda #%00000000 - sta PPUMASK - - jsr waitblank - - ; reset sound - lda #0 - sta $4000 - sta $4001 - sta $4002 - sta $4003 - sta $4004 - sta $4005 - sta $4006 - sta $4007 - sta $4009 - sta $400A - sta $400C - sta $400D - sta $400E - sta $400F - sta $4010 - sta $4011 - sta $4012 - sta $4013 - lda #$0F - sta $4015 - lda #$40 - sta $4017 - lda #0 - -load_palette: - ; load single palette for sprites - lda #$3F - sta PPUADDR - lda #$10 - sta PPUADDR - lda palette - sta PPUDATA - lda palette+1 - sta PPUDATA - lda palette+2 - sta PPUDATA - lda palette+3 - sta PPUDATA - -reset_sprites: - lda #$FF - ldx 0 -.loop: - sta SPRITES, x - inx - bne .loop - -set_sprites: - ldx 0 -.loop: - lda sprites_init_data, x - sta SPRITES, x - inx - cpx #(4 * 12) - bne .loop - - ; enable PPU - jsr waitblank - lda #%00100000 - sta PPUCTRL - lda #%00010100 - sta PPUMASK - -main_loop: - jsr waitblank - - ldx 0 -.move_sprites_loop: - inc SPRITES, x - inx - inx - inx - inx - cpx #(4 * 12 + 3) - bne .move_sprites_loop - - lda #0 - sta OAMADDR - lda #HIGH(SPRITES) - sta OAMDMA - jmp main_loop - - ; VBlank wait subroutine -waitblank: - bit PPUSTATUS - lda #0 - sta PPUSCROLL - sta PPUSCROLL -.loop: - lda PPUSTATUS ; load A with value at location PPUSTATUS - bpl .loop ; if bit 7 is not set (not VBlank) keep checking - rts - -NMI: - rti - -IRQ: - rti - -palette: - .incbin "palette_0.bin" -sprites_init_data: - .db 20, 0, 0, 0 - .db 20, 2, 0, 8 - .db 80, 4, 0, 30 - .db 80, 6, 0, 38 - .db 120, 8, 0, 60 - .db 120, 10, 0, 68 - .db 180, 12, 0, 90 - .db 180, 14, 0, 98 - - .bank 2 - .org $0000 - .incbin "pattern_0.bin" + ; INES header stuff
+ .inesprg 1 ; 1 bank of PRG
+ .ineschr 1 ; 1 bank of CHR data
+ .inesmir 0 ; mirroring
+ .inesmap 0 ; we use mapper 0
+
+ .rsset $0000 ; variables
+COPY_SOURCE_ADDR .rs 2
+COPY_DEST_ADDR .rs 2
+ .rsset $0200
+SPRITES .rs 256
+
+ .bank 1
+ .org $FFFA ; reset vectors
+ .dw NMI
+ .dw Start
+ .dw IRQ
+
+ .bank 0
+ .org $C000 ; code starts here
+Start:
+ ; disable interrupts
+ sei
+ ; reset stack
+ ldx #$ff
+ txs
+
+ ; disable PPU
+ lda #%00000000
+ sta PPUCTRL
+ lda #%00000000
+ sta PPUMASK
+
+ jsr waitblank
+
+ ; reset sound
+ lda #0
+ sta $4000
+ sta $4001
+ sta $4002
+ sta $4003
+ sta $4004
+ sta $4005
+ sta $4006
+ sta $4007
+ sta $4009
+ sta $400A
+ sta $400C
+ sta $400D
+ sta $400E
+ sta $400F
+ sta $4010
+ sta $4011
+ sta $4012
+ sta $4013
+ lda #$0F
+ sta $4015
+ lda #$40
+ sta $4017
+ lda #0
+
+load_palette:
+ ; load single palette for sprites
+ lda #$3F
+ sta PPUADDR
+ lda #$10
+ sta PPUADDR
+ lda palette
+ sta PPUDATA
+ lda palette+1
+ sta PPUDATA
+ lda palette+2
+ sta PPUDATA
+ lda palette+3
+ sta PPUDATA
+
+reset_sprites:
+ lda #$FF
+ ldx 0
+.loop:
+ sta SPRITES, x
+ inx
+ bne .loop
+
+set_sprites:
+ ldx 0
+.loop:
+ lda sprites_init_data, x
+ sta SPRITES, x
+ inx
+ cpx #(4 * 8)
+ bne .loop
+
+ ; enable PPU
+ jsr waitblank
+ lda #%00100000
+ sta PPUCTRL
+ lda #%00010100
+ sta PPUMASK
+
+main_loop:
+ jsr waitblank
+
+ ldx 0
+.move_sprites_loop:
+ inc SPRITES, x
+ inx
+ inx
+ inx
+ inx
+ cpx #(4 * 12 + 3)
+ bne .move_sprites_loop
+
+ lda #0
+ sta OAMADDR
+ lda #HIGH(SPRITES)
+ sta OAMDMA
+ jmp main_loop
+
+ ; VBlank wait subroutine
+waitblank:
+ bit PPUSTATUS
+ lda #0
+ sta PPUSCROLL
+ sta PPUSCROLL
+.loop:
+ lda PPUSTATUS ; load A with value at location PPUSTATUS
+ bpl .loop ; if bit 7 is not set (not VBlank) keep checking
+ rts
+
+NMI:
+ rti
+
+IRQ:
+ rti
+
+palette:
+ .incbin "palette_0.bin"
+sprites_init_data:
+ .db 20, 0, 0, 0
+ .db 20, 2, 0, 8
+ .db 80, 4, 0, 30
+ .db 80, 6, 0, 38
+ .db 120, 8, 0, 60
+ .db 120, 10, 0, 68
+ .db 180, 12, 0, 90
+ .db 180, 14, 0, 98
+
+ .bank 2
+ .org $0000
+ .incbin "pattern_0.bin"
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