emu_nes

commit efefe2acc2819adc7378d6ee33a4500442536d9f
parent e14776a4739f525ac2c5531fca94142454683563
Author: Vineet Kumar <git@vineetk.net>
Date:   Sun,  1 Sep 2024 19:48:33 -0400

add incomplete ppu

Diffstat:
M
cpu.c
 | 
5
+++++

1 file changed, 5 insertions(+), 0 deletions(-)
diff --git a/cpu.c b/cpu.c
@@ -54,6 +54,8 @@ peek(uint16_t addr)
 			fprintf(stderr, "PRG ROG size is not 0x4000 nor 0x8000\n"), exit(1);
 	} else if ((addr >= 0x4000 && addr <= 0x4013) || addr == 0x4015 || addr == 0x4017)
 		return apu_read(addr);
+	else if (addr >= 0x2000 && addr <= 0x3FFF)
+		return ppu_read(addr);
 	else
 		return memory[addr];
 }
@@ -71,6 +73,9 @@ memwrite(uint16_t addr, uint8_t byte)
 	if (addr >= 0x4000 && addr <= 0x4017) {
 		apu_write(addr, byte);
 		return;
+	} else if (addr >= 0x2000 && addr <= 0x3FFF) {
+		ppu_write(addr, byte);
+		return;
 	}
 
 	MEMORY_MIRROR(addr);