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| author | Jesse Luehrs <doy@tozt.net> | 2014-10-01 16:01:37 -0400 |
|---|---|---|
| committer | Jesse Luehrs <doy@tozt.net> | 2014-10-01 16:01:37 -0400 |
| commit | 9d9725e082e3c455195c7c6b86d3a6c4e7438664 (patch) | |
| tree | 2adc124553770ef0a7d994ac4571b631383956fe | |
| parent | 935dbe6f3815e2daaba88c69cb087c8ec6ad1844 (diff) | |
| download | nes-input-test-9d9725e082e3c455195c7c6b86d3a6c4e7438664.tar.gz nes-input-test-9d9725e082e3c455195c7c6b86d3a6c4e7438664.zip | |
add some controller reading
| -rw-r--r-- | test.s | 49 |
1 files changed, 47 insertions, 2 deletions
@@ -51,8 +51,53 @@ vblankwait2: ; Second wait for vblank, PPU is ready after this LDA #%10000000 ;intensify blues
STA $2001
-Forever:
- JMP Forever ;jump back to Forever, infinite loop
+ 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
|