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| author | Manuel Palenzuela <manuelpalenzuelamerino@gmail.com> | 2021-07-24 21:22:20 +0100 |
|---|---|---|
| committer | Manuel Palenzuela <manuelpalenzuelamerino@gmail.com> | 2021-07-24 21:22:20 +0100 |
| commit | dca69272607b8ac3c5c2cbef852932d8669a0d77 (patch) | |
| tree | 3f60c21bf758075d180feade1ac2b10002b38090 /emulator.c | |
| parent | Misc: Added the timer thread variable to the emulator struct (diff) | |
| download | CHIP8-Emulator-master.tar.gz CHIP8-Emulator-master.tar.bz2 CHIP8-Emulator-master.zip | |
Diffstat (limited to 'emulator.c')
| -rw-r--r-- | emulator.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/emulator.c b/emulator.c index 8fed056..466a9f2 100644 --- a/emulator.c +++ b/emulator.c @@ -248,8 +248,8 @@ int emulator_tick(Emulator* emulator) emulator->regs.V[X] -= emulator->regs.V[Y]; break; case 0x6: - emulator->regs.V[X] = emulator->regs.V[X] >> 1; - emulator->regs.VF = N == 0x1 ? 1 : 0; + emulator->regs.VF = emulator->regs.V[X] & 0x1; + emulator->regs.V[X] >>= 1; break; case 0x7: if(emulator->regs.V[Y] > emulator->regs.V[X]) @@ -259,8 +259,8 @@ int emulator_tick(Emulator* emulator) emulator->regs.V[X] = emulator->regs.V[Y] - emulator->regs.V[X]; break; case 0xE: - emulator->regs.V[X] = emulator->regs.V[X] << 1; - emulator->regs.VF = first_nibble == 0x1 ? 1 : 0; + emulator->regs.VF = emulator->regs.V[X] >> 7; + emulator->regs.V[X] <<= 1; break; default: printf("DEFAULT: Instr: 0x%x\n", instr); @@ -342,12 +342,12 @@ int emulator_tick(Emulator* emulator) case 0x55: //FX55 for (int i = 0; i <= X; ++i) emulator->memory[emulator->regs.I + i] = emulator->regs.V[i]; - emulator->regs.I += X + 1; + COSMAC_VIP(emulator->regs.I += X + 1;) break; case 0x65: //FX65 for (int i = 0; i <= X; ++i) emulator->regs.V[i] = emulator->memory[emulator->regs.I + i]; - emulator->regs.I += X + 1; + COSMAC_VIP(emulator->regs.I += X + 1;) break; case 0x15: //FX15 dbgprintf("SET THE DELAY TIMER TO V[X]!\n"); |