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disassemble every single opcode

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This commit is contained in:
Antoni Piasecki
2025-07-13 19:54:57 +02:00
parent 212f5aa9cc
commit b24fc558cc
3 changed files with 313 additions and 20 deletions
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8
chip8.c
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@@ -37,7 +37,7 @@ typedef struct CHIP8 {
uint8_t *display;
} CHIP8;
CHIP8 chip8_create() {
CHIP8 chip8_create(void) {
static const uint8_t fonts[] = {
0xF0, 0x90, 0x90, 0x90, 0xF0, // 0
0x20, 0x60, 0x20, 0x20, 0x70, // 1
@@ -284,7 +284,7 @@ void chip8_step(CHIP8 *c) {
c->reg[x] = c->reg[y] - c->reg[x];
break;
case 0xE:
c->reg[0xF] = (c->reg[x] & 0b10000000) >> 7;
c->reg[0xF] = (c->reg[x] & 0x80) >> 7;
c->reg[x] <<= 1;
break;
default:
@@ -309,7 +309,7 @@ void chip8_step(CHIP8 *c) {
c->reg[0xF] = 0;
for (size_t row = 0; row < n; row++) {
for (int col = 0; col < 8; col++) {
if ((c->memory[c->I + row] & (0b10000000 >> col)) != 0) {
if ((c->memory[c->I + row] & (0x80 >> col)) != 0) {
size_t pixel_x = (c->reg[x] + col) % 64;
size_t pixel_y = (c->reg[y] + row) % 32;
size_t offset = pixel_x + (pixel_y * 64);
@@ -441,4 +441,4 @@ int main(int argc, char *argv[]) {
EndDrawing();
}
}
}