start working on ppu

1 files changed, 13 insertions, 0 deletions

diff --git a/ppu.c b/ppu.c
index 4ae0162..5dc20a3 100644
--- a/ppu.c
+++ b/ppu.c
@@ -13,3 +13,16 @@ ppu_tick(void)
         if (ppu.scanlines >= 262)
                 ppu.scanlines -= 262;
 }
+
+uint8_t
+ppu_read(uint16_t addr)
+{
+}
+
+void
+ppu_write(uint16_t addr, uint8_t byte)
+{
+        static uint8_t prev;
+
+        prev = byte;
+}