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| author | Manuel Palenzuela <manuelpalenzuelamerino@gmail.com> | 2021-07-19 18:40:19 +0100 |
|---|---|---|
| committer | Manuel Palenzuela <manuelpalenzuelamerino@gmail.com> | 2021-07-19 18:40:19 +0100 |
| commit | 8becc7265b8d8b9d5f716887de41910957175ccf (patch) | |
| tree | a72c11866e6a334f46493edf67990481ec120617 | |
| parent | Feature: Prepared SDL window for pixel drawing instruction (diff) | |
| download | CHIP8-Emulator-8becc7265b8d8b9d5f716887de41910957175ccf.tar.gz CHIP8-Emulator-8becc7265b8d8b9d5f716887de41910957175ccf.tar.bz2 CHIP8-Emulator-8becc7265b8d8b9d5f716887de41910957175ccf.zip | |
Debug: Added draw debug prints
| -rw-r--r-- | config.h | 2 | ||||
| -rw-r--r-- | emulator.c | 39 | ||||
| -rw-r--r-- | x | 0 |
3 files changed, 40 insertions, 1 deletions
diff --git a/config.h b/config.h index a40e76f..cf73451 100644 --- a/config.h +++ b/config.h @@ -1,7 +1,7 @@ #ifndef _CONFIG_H_ #define _CONFIG_H_ -#define DEBUG 1 +#define DEBUG 0 #define INSTRUCTIONS_PER_SECOND 700 #define GAME_LOAD_LOCATION 0x200 diff --git a/emulator.c b/emulator.c index 87b6e81..15c5e39 100644 --- a/emulator.c +++ b/emulator.c @@ -62,6 +62,20 @@ int emulator_load_rom(Emulator* emulator, char* rom_name) return 0; } +static void show_screen(Emulator* em) +{ + printf("SCREEN: \n"); + for(int x = 0; x < 64; ++x) + { + for(int y = 0; y < 32; ++y) + { + printf("%d ", em->display[x][y]); + } + printf("\n"); + } + printf("\n"); +} + int emulator_tick(Emulator* emulator) { uint16_t* pc = &emulator->pc; @@ -124,6 +138,31 @@ int emulator_tick(Emulator* emulator) break; case 0xD: dbgprintf("DRAW!\n"); + //show_screen(emulator); + int x = emulator->regs.V[X] % 64; + int y = emulator->regs.V[Y] % 32; + printf("DRAWING 0x%x AT (%d, %d)\n", emulator->regs.I, x, y); + + + emulator->regs.VF = 0; + + for(int row = 0; row < N; ++row) + { + uint8_t pixel = emulator->memory[emulator->regs.I + row]; + for(int xline = 0; xline < 8; xline++) + { + if((pixel & (0x80 >> xline)) != 0) + { + if(emulator->display[x][y] == 1) + { + emulator->regs.V[0xF] = 1; + } + emulator->display[x][y] ^= 1; + } + } + } + //show_screen(emulator); + emulator->draw_flag = 1; break; case 0xE: diff --git a/x b/x new file mode 100644 index 0000000..e69de29 --- /dev/null +++ b/x |