#define ACRTC_BASE   0xAA0000                       /* device address        */

/* graphics system parameters */

#define HRES 640                                    /* horizontal resolution */
#define VRES 480                                    /* vertical resolution   */
#define PIXW  16                                    /* pixels per word       */

/* acrtc status register bits */

#define WFR 1                                       /* write fifo ready      */
#define CED 5                                       /* command end           */

/* acrtc graphic commands */

#define CLR          0x5800
#define AMOVE        0x8000
#define ALINE        0x8800
#define ARCT         0X9000
#define CRCL         0xA800