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Use the SNES/NES controller in Assembly
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=== ; This is test code that goes through all the ports and mux the NES and SNES... === NES_CTRL = $D880 NES_STAT = $D880 NES_EN = $01 NES_MODE = $04 NES_TRIG = $80 NES_DONE = $40 NES_JOY0 = $D884 NES_JOY1 = $D886 NES_JOY2 = $D888 NES_JOY3 = $D88A SNES_JOY0_LO = $D884 SNES_JOY0_HI = $D885 SNES_JOY1_LO = $D886 SNES_JOY1_HI = $D887 SNES_JOY2_LO = $D888 SNES_JOY2_HI = $D889 SNES_JOY3_LO = $D88A SNES_JOY3_HI = $D88B Test_4N4S: jsr SetIOPage0 '''; Test NES First''' '''; Enable and Begin a Sample''' NES_Start_Again: lda #NES_EN sta NES_CTRL lda NES_CTRL ora #NES_TRIG sta NES_CTRL and #~NES_TRIG sta NES_CTRL NESWait2beDone lda NES_STAT and #NES_DONE cmp #NES_DONE bne NESWait2beDone '''; When here, the Joystick Sampling is done''' lda NES_JOY0 eor #$FF ldx #$00 jsr Byte2Hex lda NES_JOY1 eor #$FF ldx #$03 jsr Byte2Hex lda NES_JOY2 eor #$FF ldx #$06 jsr Byte2Hex lda NES_JOY3 eor #$FF ldx #$09 jsr Byte2Hex lda NES_JOY3 eor #$FF and #$C0 cmp #$C0 beq NESDoneWithTest '''; Let's do the SNES''' lda #NES_EN | NES_MODE sta NES_CTRL lda NES_CTRL ora #NES_TRIG sta NES_CTRL and #~NES_TRIG sta NES_CTRL SNESWait2beDone lda NES_STAT and #NES_DONE cmp #NES_DONE bne SNESWait2beDone '''; When here, the Joystick Sampling is done''' lda SNES_JOY0_HI and #$0F eor #$0F ldx #$50 jsr Byte2Hex lda SNES_JOY0_LO eor #$FF ldx #$52 jsr Byte2Hex lda SNES_JOY1_HI and #$0F eor #$0F ldx #$55 jsr Byte2Hex lda SNES_JOY1_LO eor #$FF ldx #$57 jsr Byte2Hex lda SNES_JOY2_HI and #$0F eor #$0F ldx #$5A jsr Byte2Hex lda SNES_JOY2_LO eor #$FF ldx #$5C jsr Byte2Hex lda SNES_JOY3_HI and #$0F eor #$0F ldx #$5F jsr Byte2Hex lda SNES_JOY3_LO eor #$FF ldx #$61 jsr Byte2Hex jmp NES_Start_Again NESDoneWithTest: lda #$00 sta NES_CTRL rts Byte2Hex: sta $50 stx $51 jsr SetIOPage2 '''; Hi Part''' lda $50 and #$F0 lsr a lsr a lsr a lsr a tax lda HEX, x ; ldx $51 sta $c320,x '''; Low Part''' lda $50 and #$0F tax lda HEX, x ldx $51 sta $c321,x jsr SetIOPage0 rts
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