start implementing PPU

1 files changed, 23 insertions, 0 deletions

diff --git a/ppu.h b/ppu.h
new file mode 100644
index 0000000..1527b93
--- /dev/null
+++ b/ppu.h
@@ -0,0 +1,23 @@
+#ifndef PPU_H
+#define PPU_H
+
+#include <stdio.h>
+#include <stdint.h>
+
+#include "rom.h"
+
+struct ppu {
+        uint8_t oam[64*4];
+        uint8_t vram[2048];
+        uint8_t palette[16*2];
+        uint16_t cycles, scanlines;
+        /* copied from rom */
+        uint8_t *chr_rom;
+        size_t chr_rom_size;
+        enum screen_mirroring mirror;
+};
+extern struct ppu ppu;
+
+void ppu_tick(void);
+
+#endif /* PPU_H */