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| author | Manuel Palenzuela <manuelpalenzuelamerino@gmail.com> | 2021-07-20 09:47:43 +0100 |
|---|---|---|
| committer | Manuel Palenzuela <manuelpalenzuelamerino@gmail.com> | 2021-07-20 09:47:43 +0100 |
| commit | a89affd391d3267e52c246803c6bd9bca414f2d1 (patch) | |
| tree | 8dba151fd49644017ba52ed8c2c4abd89b0e541e | |
| parent | Misc: Removed unnecesary file (diff) | |
| download | CHIP8-Emulator-a89affd391d3267e52c246803c6bd9bca414f2d1.tar.gz CHIP8-Emulator-a89affd391d3267e52c246803c6bd9bca414f2d1.tar.bz2 CHIP8-Emulator-a89affd391d3267e52c246803c6bd9bca414f2d1.zip | |
Misc: Added some debug output to the implemented instructions
| -rw-r--r-- | emulator.c | 50 |
1 files changed, 30 insertions, 20 deletions
diff --git a/emulator.c b/emulator.c index b3c6f42..b0b3e61 100644 --- a/emulator.c +++ b/emulator.c @@ -91,6 +91,7 @@ int emulator_tick(Emulator* emulator) case 0x0E0: //00E0: Clear screen dbgprintf("CLEAR SCREEN!\n"); memset(emulator->display, 0, sizeof(emulator->display)); + emulator->draw_flag = 1; break; } @@ -113,16 +114,24 @@ int emulator_tick(Emulator* emulator) assert(0); break; case 0x3: + dbgprintf("SKIP INSTR IF REGISTER VX == NN!\n"); if(emulator->regs.V[X] == NN) + { + dbgprintf("SKIPPED COZ THEY WERE EQUAL!\n"); *pc += 2; + } break; case 0x4: printf("TODO: Instr: 0x%x\n", instr); assert(0); break; case 0x5: + dbgprintf("SKIP INSTR IF REGISTER VX == VY!\n"); if(emulator->regs.V[X] == emulator->regs.V[Y]) + { + dbgprintf("SKIPPED COZ THEY WERE EQUAL!\n"); *pc += 2; + } break; case 0x6: dbgprintf("SET REGISTER VX! (0x%x)\n", NN); @@ -136,26 +145,28 @@ int emulator_tick(Emulator* emulator) switch(N) { case 0x0: - emulator->regs.V[X] = emulator->regs.V[Y]; - break; - case 0x1: - case 0x2: - case 0x3: - printf("TODO: Instr: 0x%x -- %d\n", instr, N); - assert(0); + dbgprintf("SET VX TO VY!\n"); + emulator->regs.V[X] = emulator->regs.V[Y]; + break; + case 0x1: + case 0x2: + case 0x3: + printf("TODO: Instr: 0x%x -- %d\n", instr, N); + assert(0); + break; + case 0x4: + dbgprintf("ADD VY TO VX!\n"); + if(emulator->regs.V[X] + emulator->regs.V[Y] > 255) + emulator->regs.VF = 1; + else + emulator->regs.VF = 0; + + emulator->regs.V[X] += emulator->regs.V[Y]; + break; + case 0x5: + case 0x6: + case 0xE: break; - case 0x4: - if(emulator->regs.V[X] + emulator->regs.V[Y] > 255) - emulator->regs.VF = 1; - else - emulator->regs.VF = 0; - - emulator->regs.V[X] += emulator->regs.V[Y]; - break; - case 0x5: - case 0x6: - case 0xE: - break; } break; @@ -176,7 +187,6 @@ int emulator_tick(Emulator* emulator) int y = emulator->regs.V[Y] % 32; emulator->regs.VF = 0; - for(int row = 0; row < N; ++row) { uint8_t pixels = emulator->memory[emulator->regs.I + row]; |