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Loïc Guégan 2023-12-26 09:21:34 +01:00
parent 64917e3504
commit 3738e41d2d
2 changed files with 7 additions and 9 deletions
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2
src/main.c
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@ -3,7 +3,7 @@
#include "vcpu.h" #include "vcpu.h"
#include <stdio.h> #include <stdio.h>
#define ROM "../roms/chip8-test-suite/6-keypad.ch8" #define ROM "../roms/chip8-test-suite/5-quirks.ch8"
//#define ROM "../roms/games/pong_1player.ch8" //#define ROM "../roms/games/pong_1player.ch8"
int main(int argc, char *argv[]) int main(int argc, char *argv[])

14
src/vcpu.c
View file

@ -212,17 +212,15 @@ void VCPUExecute(){
if(State.V[State.X]&0x0F == State.keypress&0xF){ if(State.V[State.X]&0x0F == State.keypress&0xF){
State.PC+=2; State.PC+=2;
} }
State.keypress=-1;
} }
State.keypress=-1;
}else if(State.NN==0xA1){ // Skip if not keypress in VX }else if(State.NN==0xA1){ // Skip if not keypress in VX
State.PC+=2; // First skip
if(State.keypress >=0){ if(State.keypress >=0){
if(State.V[State.X]&0x0F != State.keypress&0xF){ if(State.V[State.X]&0x0F == State.keypress&0x0F)
State.PC+=2; State.PC+=2; // Ignore skip if pressed
}
State.keypress=-1;
} }
else State.keypress=-1;
State.PC+=2;
} }
break; break;
@ -237,8 +235,8 @@ void VCPUExecute(){
State.V[State.X]=State.keypress&0xF; State.V[State.X]=State.keypress&0xF;
if(State.V[State.X]&0x0F != State.keypress&0xF){ if(State.V[State.X]&0x0F != State.keypress&0xF){
State.PC+=2; State.PC+=2;
State.keypress=-1;
} }
State.keypress=-1;
} }
else else
State.PC-=2; // Go back to last instruction (loop until key is pressed) State.PC-=2; // Go back to last instruction (loop until key is pressed)