netbsd:

  ccr = ici | ice | oci | oce

video.s:

  ba98 7654 3210
  1001_0000_1101

  ccr = ici | ice | oci | cb | oce

strt1.src:

  ccr = (ccr & 0x89af) | 0x800
  0b1000 0000 0000

startup.s:

  ccr = 0x90d

todo:

- stack
- ccr
- mmucr
- interrupt mask

---

   kmySetBorderColor( 0x00000000 );

   if (syCblCheckCable() == SYE_CBL_CABLE_VGA) {

   syTmrInit()

    1. kmInitDevice
    2. kmSetDisplayMode

   - waitvsync

   syChainInit()
   syG2SysInit(NULL)

    3. kmSetSystemConfiguration

---

/*
// KM_DSPMODE_XXXX
// ---------------
//  Bit order : Little Endian:?
//  xxxx xxxx xxxx xxxx
//             ||| ||||
//             ||| |||+---- VGA = 1     ; 0x01  = KM_VGA
//             ||| ||+----- NTSC= 0     ; 0x00  = KM_NTSC
//             ||| ||       PAL = 1     ; 0x02  = KM_PAL
//             ||| |+------ NI  = 0     ; 0x00  = Enable Interlace Flicker Fliter on NTSC/PAL
//             ||| |        I   = 1     ; 0x04  = Interlace
//             ||| +--------PNI = 1     : 0x08  = pseudo-non-interlace
//             ||+--------- 320 = 0     ; 0x00
//             ||           640 = 1     ; 0x10
//             |+---------- 240 = 0     ; 0x00
//             |            480 = 1     ; 0x20
//             +----------- EXT = 1     ; 0x40  = PAL DisplayArea Extension
//
*/
typedef enum
{
    KM_NTSC = 0,                /*  xxxx xx00b  */
    KM_VGA  = 1,                /*  xxxx xxx1b  */
    KM_PAL  = 2                 /*      xxxx xx10b      */

}KMVIDEOMODE;

/*
 * KMVIDEOMODE
 *
 *      (@1) ... Same line display              : Even / Odd Frame:
 *      (@2) ... Pseudo-Non-Interlace           : Disable Flicker Filter
 *      (@3) ... Non-Interlace Flicker Free     : Enable Interlace Flicker Fliter (Pseudo-None-Interlace...)
 *           If you select this mode then you have to update each frame data  in 16.66ms.
 *           Your scene data should be able to finish renderring in 16.66ms by PowerVR2 Renderring Engine.
 */

#define KM_DSPMODE_NONINTERLACE                 (0x00)      /*  xxxx 00xxb      */
#define KM_DSPMODE_INTERLACE                    (0x04)      /*  xxxx 01xxb      */
#define KM_DSPMODE_PSEUDONONINTERLACE   (0x08)      /*  xxxx 10xxb      */

#define KM_DSPMODE_WIDTH_320                    (0x000)     /*  xxx0 xxxxb      */
#define KM_DSPMODE_WIDTH_640                    (0x010)     /*  xxx1 xxxxb      */

#define KM_DSPMODE_HEIGHT_240                   (0x000)     /*  xx0x xxxxb      */
#define KM_DSPMODE_HEIGHT_480                   (0x020)     /*  xx1x xxxxb      */
#define KM_DSPMODE_HEIGHT_EXT                   (0x040)         /*  x1xx xxxxb  */

#define KM_DSPMODE_320x240      (KM_DSPMODE_WIDTH_320 | KM_DSPMODE_HEIGHT_240)           /*  xx00 xxxxb */
#define KM_DSPMODE_640x240      (KM_DSPMODE_WIDTH_640 | KM_DSPMODE_HEIGHT_240)           /*  xx01 xxxxb */
#define KM_DSPMODE_320x480      (KM_DSPMODE_WIDTH_320 | KM_DSPMODE_HEIGHT_480)           /*  xx10 xxxxb */
#define KM_DSPMODE_640x480      (KM_DSPMODE_WIDTH_640 | KM_DSPMODE_HEIGHT_480)           /*  xx11 xxxxb */

#define KM_DSPMODE_640x240_EXT  (KM_DSPMODE_WIDTH_640 | KM_DSPMODE_HEIGHT_240 | KM_DSPMODE_HEIGHT_EXT)
#define KM_DSPMODE_640x480_EXT  (KM_DSPMODE_WIDTH_640 | KM_DSPMODE_HEIGHT_480 | KM_DSPMODE_HEIGHT_EXT)