#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_