diff options
| author | Jesse Luehrs <doy@tozt.net> | 2014-10-01 16:02:02 -0400 |
|---|---|---|
| committer | Jesse Luehrs <doy@tozt.net> | 2014-10-01 16:02:02 -0400 |
| commit | 3aa246d41fe39f4b851ead941846b66ce0c5f492 (patch) | |
| tree | b5589b354eace411de736dbe05bb49a952e8ba8c | |
| parent | 9d9725e082e3c455195c7c6b86d3a6c4e7438664 (diff) | |
| download | nes-input-test-3aa246d41fe39f4b851ead941846b66ce0c5f492.tar.gz nes-input-test-3aa246d41fe39f4b851ead941846b66ce0c5f492.zip | |
unix line endings
| -rw-r--r-- | test.s | 224 |
1 files changed, 112 insertions, 112 deletions
@@ -1,112 +1,112 @@ -.MEMORYMAP
-SLOTSIZE $2000
-DEFAULTSLOT 0
-SLOT 0 $C000
-SLOT 1 $E000
-.ENDME
-
-.ROMBANKMAP
-BANKSTOTAL 2
-BANKSIZE $2000
-BANKS 2
-.ENDRO
-
-
- .bank 0
- .org $0000
-RESET:
- SEI ; disable IRQs
- CLD ; disable decimal mode
- LDX #$40
- STX $4017.W ; disable APU frame IRQ
- LDX #$FF
- TXS ; Set up stack
- INX ; now X = 0
- STX $2000.W ; disable NMI
- STX $2001.W ; disable rendering
- STX $4010.W ; disable DMC IRQs
-
-vblankwait1: ; First wait for vblank to make sure PPU is ready
- BIT $2002
- BPL vblankwait1
-
-clrmem:
- LDA #$00
- STA $0000, x
- STA $0100, x
- STA $0200, x
- STA $0400, x
- STA $0500, x
- STA $0600, x
- STA $0700, x
- LDA #$FE
- STA $0300, x
- INX
- BNE clrmem
-
-vblankwait2: ; Second wait for vblank, PPU is ready after this
- BIT $2002
- BPL vblankwait2
-
- LDA #%10000000 ;intensify blues
- STA $2001
-
- LDX #$00
-
-read_controller1:
- ; latch
- LDA #$01
- STA $4016
- LDA #$00
- STA $4016
-
- ; clock
- LDA $4016 ; A
- AND #%00000001
- TAY
- LDA $4016 ; B
- LDA $4016 ; Select
- LDA $4016 ; Start
- LDA $4016 ; Up
- LDA $4016 ; Down
- LDA $4016 ; Left
- LDA $4016 ; Right
-
- CPY #$00
- BEQ read_controller1
-
- CPX #$00
- BEQ turn_green
- CPX #$01
- BEQ turn_red
-
-turn_blue:
- LDA #%10000000
- STA $2001
- LDX #$00
- JMP read_controller1
-
-turn_green:
- LDA #%01000000
- STA $2001
- LDX #$01
- JMP read_controller1
-
-turn_red:
- LDA #%00100000
- STA $2001
- LDX #$02
- JMP read_controller1
-
-
-NMI:
- RTI
-
-
- .bank 1 slot 1
- .orga $FFFA ;first of the three vectors starts here
- .dw NMI ;when an NMI happens (once per frame if enabled) the
- ;processor will jump to the label NMI:
- .dw RESET ;when the processor first turns on or is reset, it will jump
- ;to the label RESET:
- .dw 0 ;external interrupt IRQ is not used in this tutorial
+.MEMORYMAP +SLOTSIZE $2000 +DEFAULTSLOT 0 +SLOT 0 $C000 +SLOT 1 $E000 +.ENDME + +.ROMBANKMAP +BANKSTOTAL 2 +BANKSIZE $2000 +BANKS 2 +.ENDRO + + + .bank 0 + .org $0000 +RESET: + SEI ; disable IRQs + CLD ; disable decimal mode + LDX #$40 + STX $4017.W ; disable APU frame IRQ + LDX #$FF + TXS ; Set up stack + INX ; now X = 0 + STX $2000.W ; disable NMI + STX $2001.W ; disable rendering + STX $4010.W ; disable DMC IRQs + +vblankwait1: ; First wait for vblank to make sure PPU is ready + BIT $2002 + BPL vblankwait1 + +clrmem: + LDA #$00 + STA $0000, x + STA $0100, x + STA $0200, x + STA $0400, x + STA $0500, x + STA $0600, x + STA $0700, x + LDA #$FE + STA $0300, x + INX + BNE clrmem + +vblankwait2: ; Second wait for vblank, PPU is ready after this + BIT $2002 + BPL vblankwait2 + + LDA #%10000000 ;intensify blues + STA $2001 + + LDX #$00 + +read_controller1: + ; latch + LDA #$01 + STA $4016 + LDA #$00 + STA $4016 + + ; clock + LDA $4016 ; A + AND #%00000001 + TAY + LDA $4016 ; B + LDA $4016 ; Select + LDA $4016 ; Start + LDA $4016 ; Up + LDA $4016 ; Down + LDA $4016 ; Left + LDA $4016 ; Right + + CPY #$00 + BEQ read_controller1 + + CPX #$00 + BEQ turn_green + CPX #$01 + BEQ turn_red + +turn_blue: + LDA #%10000000 + STA $2001 + LDX #$00 + JMP read_controller1 + +turn_green: + LDA #%01000000 + STA $2001 + LDX #$01 + JMP read_controller1 + +turn_red: + LDA #%00100000 + STA $2001 + LDX #$02 + JMP read_controller1 + + +NMI: + RTI + + + .bank 1 slot 1 + .orga $FFFA ;first of the three vectors starts here + .dw NMI ;when an NMI happens (once per frame if enabled) the + ;processor will jump to the label NMI: + .dw RESET ;when the processor first turns on or is reset, it will jump + ;to the label RESET: + .dw 0 ;external interrupt IRQ is not used in this tutorial |