--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/vdp.h	Sun Mar 27 00:24:31 2016 -0700
@@ -0,0 +1,41 @@
+#ifndef VDP_H_
+#define VDP_H_
+
+typedef struct {
+	uint32_t cycles;
+	uint32_t clock_inc;
+	
+	uint16_t fifo;
+	uint16_t dest_offset;
+	uint16_t status;
+	
+	uint16_t vcounter;
+	uint16_t hcounter;
+	
+	uint16_t vscroll;
+	uint16_t hscroll;
+	
+	uint16_t vram[32*512];
+	uint16_t sram[64*2];
+	uint16_t cram[64];
+	
+	uint8_t  fifo_dest;
+} vdp;
+
+enum {
+	FIFO_DEST_INVALID,
+	FIFO_DEST_VRAM,
+	FIFO_DEST_SRAM,
+	FIFO_DEST_CRAM
+};
+
+#define VDP_STATUS_FIFO 1
+#define VDP_STATUS_VRAM 2
+#define VDP_STATUS_SRAM 4
+
+void vdp_init(vdp *context, uint32_t clock_div);
+void vdp_run(vdp *context, uint32_t target);
+void vdp_write_address(vdp *context, uint16_t value);
+void vdp_write_data(vdp *context, uint16_t value);
+
+#endif //VDP_H_