8bit Coding Dooshco
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| P1Up: lda GAMEPORT1 | |
| and #1 | |
| bne P1Dn | |
| jsr Player1Up | |
| P1Dn: lda GAMEPORT1 | |
| and #2 | |
| bne P2Up | |
| jsr Player1Down |
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| //=========================================== | |
| WaitForFireButton: | |
| // | |
| // Input: None | |
| // Modifies: A | |
| //=========================================== | |
| !: lda GAMEPORT1 | |
| and GAMEPORT2 | |
| and #$10 | |
| bne !- |
Dooshco
/ gist:308056f6751dd905762ec5b710570fcc
Last active
August 10, 2019 20:37
PlayerUp/PlayerDown
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| //=========================================== | |
| Player1Up: | |
| // | |
| // Input: None | |
| // Modifies: A,X,Y | |
| //=========================================== | |
| ldx P1Y | |
| ldy #P1X | |
| jsr RacketOff | |
| ldx P1Y |
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| //=========================================== | |
| InitGraphics: | |
| // | |
| // Input: none | |
| // Modifies: A,X,Y | |
| //=========================================== | |
| jsr CLS | |
| lda #1 // White Text | |
| jsr SetColor | |
| lda #0 |
Dooshco
/ gist:99620ed31ce62f439b675e4cf4e66f10
Created
August 10, 2019 22:52
KickAssembler Screen Lookup
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| // Lookup table to screen locations for fast calculations | |
| ScreenLo: | |
| .for (var i=SCREEN;i<SCREEN+1000;i+=40) { | |
| .byte <i | |
| } | |
| ScreenHi: | |
| .for (var i=SCREEN;i<SCREEN+1000;i+=40) { | |
| .byte >i | |
| } |
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| //=========================================== | |
| InitSound: | |
| // | |
| // Input: None | |
| // Modifies: A | |
| //=========================================== | |
| // Voice 1 - High pitch for ball bounce off the wall | |
| lda #$00 | |
| sta $d400 | |
| lda #$30 |
Dooshco
/ gist:1e2a4a3eb7fc05d052d6d0f5a54aaa71
Last active
August 11, 2019 01:39
SoundOn / SoundOff
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| Sound1On: pha | |
| lda #%00010001 // Sawtooth, gate open | |
| sta $d404 // Voice 1 | |
| lda #Sound1Duration | |
| sta Sound1Counter | |
| pla | |
| rts | |
| Sound1Off: pha | |
| lda #%00010000 // Sawtooth, gate close |
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| //=========================================== | |
| CheckSound: | |
| // | |
| // Input: None | |
| // Modifies: A | |
| //=========================================== | |
| // Check sound 1 | |
| lda Sound1Counter | |
| beq s2 | |
| dec Sound1Counter |
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| // Hardware locations | |
| .label SCREEN = $0400 // Start of Default Screen | |
| .label COLOR = $D800 // Color Memory Location | |
| .label RASTER = $D012 // VIC Raster counter | |
| // CIA addresses | |
| .label GAMEPORT1 = $dc01 | |
| .label GAMEPORT2 = $dc00 | |
| // Custom constants |
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| FrameCount: .byte 0 | |
| BallX: .byte 20 | |
| SpeedX: .byte 0 | |
| BallY: .byte 12 | |
| SpeedY: .byte 0 | |
| Background: .byte 117 | |
| P1Y: .byte 0 | |
| P2Y: .byte 0 | |
| P1Score: .byte 0 |
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