--- a/jag_video.h	Fri Oct 07 18:27:38 2016 -0700
+++ b/jag_video.h	Sat Oct 08 23:49:20 2016 -0700
@@ -1,7 +1,52 @@
 #ifndef JAG_VIDEO_H_
 #define JAG_VIDEO_H_
 
-#define JAG_VIDEO_REGS 0x2E
+enum {
+	VID_HCOUNT,
+	VID_VCOUNT,
+	VID_HLPEN,
+	VID_VLPEN,
+	VID_REG_C,
+	VID_REG_E,
+	VID_OBJ0,
+	VID_OBJ1,
+	VID_OBJ2,
+	VID_OBJ3,
+	VID_REG_18,
+	VID_REG_1A,
+	VID_REG_1C,
+	VID_REG_1E,
+	VID_OBJLIST1,
+	VID_OBJLIST2,
+	VID_REG_24,
+	VID_OBJFLAG,
+	VID_VMODE,
+	VID_BORDER_RG,
+	VID_BORDER_B,
+	VID_HPERIOD,
+	VID_HBLANK_BEGIN,
+	VID_HBLANK_END,
+	VID_HSYNC,
+	VID_HVSYNC,
+	VID_HDISP_BEGIN1,
+	VID_HDISP_BEGIN2,
+	VID_HDISP_END,
+	VID_VPERIOD,
+	VID_VBLANK_BEGIN,
+	VID_VBLANK_END,
+	VID_VSYNC,
+	VID_VDISP_BEGIN,
+	VID_VDISP_END,
+	VID_VEQUAL_BEGIN,
+	VID_VEQUAL_END,
+	VID_VINT,
+	VID_PIT0,
+	VID_PIT1,
+	VID_HEQUAL_END,
+	VID_REG_56,
+	VID_BGCOLOR,
+	JAG_VIDEO_REGS
+};
 #define LINEBUFFER_WORDS 720
 
 typedef struct {
@@ -13,10 +58,15 @@
 	uint16_t     *write_line_buffer;
 	uint16_t     *read_line_buffer;
 	
-	uint32_t cycles;
+	uint32_t     cycles;
+	uint8_t      pclock_div;
+	uint8_t      pclock_counter;
+	uint8_t      mode;
 } jag_video;
 
+
 jag_video *jag_video_init(void);
 void jag_video_run(jag_video *context, uint32_t target_cycle);
+void jag_video_reg_write(jag_video *context, uint32_t address, uint16_t value);
 
 #endif //JAG_VIDEO_H_