1998/0116/pc/vgas3.c (diff list | history)

1997/1101/sys/src/9/pc/vgas3.c:44,52 – 1998/0116/sys/src/9/pc/vgas3.c:44,63 (short | long | prev | next)
1994/0803		static void
1997/1101		s3page(VGAscr* scr, int page)
1994/0803		{
1997/1101		lock(&scr->devlock); s3pageset(scr, page); unlock(&scr->devlock);
1998/0116		int id; id = (vgaxi(Crtx, 0x30)<<8)|vgaxi(Crtx, 0x2E); switch(id){ case 0xE110: /* ViRGE/GX2 */ break; default: lock(&scr->devlock); s3pageset(scr, page); unlock(&scr->devlock); break; }
1997/1101		} static ulong
1997/1101/sys/src/9/pc/vgas3.c:109,115 – 1998/0116/sys/src/9/pc/vgas3.c:120,126
1994/0803		static void
1997/1101		s3enable(VGAscr* scr)
1997/0327		{
1994/0803		int i;
1998/0116		int i, id;
1997/1101		ulong storage;
1994/0803
1997/1101		s3disable(scr);
1997/1101/sys/src/9/pc/vgas3.c:117,133 – 1998/0116/sys/src/9/pc/vgas3.c:128,158
1994/0803		/* * Cursor colours. Set both the CR0[EF] and the colour * stack in case we are using a 16-bit RAMDAC.
1994/0804		* Why are these colours reversed?
1998/0116		* This stuff is just a mystery for the ViRGE/GX2.
1994/0803		*/
1995/0126		vgaxo(Crtx, 0x0E, Pwhite); vgaxo(Crtx, 0x0F, Pblack);
1994/0803		vgaxi(Crtx, 0x45); for(i = 0; i < 4; i++)
1995/0126		vgaxo(Crtx, 0x4A, Pwhite);
1994/0803		vgaxi(Crtx, 0x45); for(i = 0; i < 4; i++)
1995/0126		vgaxo(Crtx, 0x4B, Pblack);
1998/0116		id = (vgaxi(Crtx, 0x30)<<8)|vgaxi(Crtx, 0x2E); switch(id){
1994/0803
1998/0116		case 0xE110: /* ViRGE/GX2 */ for(i = 0; i < 3; i++) vgaxo(Crtx, 0x4A, Pblack); vgaxi(Crtx, 0x45); for(i = 0; i < 3; i++) vgaxo(Crtx, 0x4B, Pwhite); break; default: for(i = 0; i < 3; i++) vgaxo(Crtx, 0x4A, Pwhite); vgaxi(Crtx, 0x45); for(i = 0; i < 3; i++) vgaxo(Crtx, 0x4B, Pblack); break; }
1994/0803		/* * Find a place for the cursor data in display memory. * Must be on a 1024-byte boundary.
1997/1101/sys/src/9/pc/vgas3.c:139,147 – 1998/0116/sys/src/9/pc/vgas3.c:164,172
1997/1101		scr->storage = storage;
1994/0803		/* * Enable the cursor in X11 mode.
1998/0116		* Enable the cursor in Microsoft Windows format.
1994/0803		*/ vgaxo(Crtx, 0x55, vgaxi(Crtx, 0x55)|0x10);
1998/0116		vgaxo(Crtx, 0x55, vgaxi(Crtx, 0x55) & ~0x10);
1997/1101		s3vsyncactive();
1994/0803		vgaxo(Crtx, 0x45, 0x01); }
1997/1101/sys/src/9/pc/vgas3.c:150,178 – 1998/0116/sys/src/9/pc/vgas3.c:175,212
1997/1101		s3load(VGAscr* scr, Cursor* curs)
1994/0803		{
1994/0804		uchar *p;
1997/1101		int opage, x, y;
1998/0116		int id, opage, x, y;
1994/0803		/*
1997/1101		* Disable the cursor and * set the pointer to the two planes. * Is linear addressing turned on? This will determine * how we access the cursor storage.
1994/0809		*/
1997/1101		s3disable(scr);
1994/0809
1998/0116		opage = 0;
1997/1101		p = KADDR(scr->aperture); lock(&scr->devlock); opage = s3pageset(scr, scr->storage>>16); p += (scr->storage & 0xFFFF);
1998/0116		id = (vgaxi(Crtx, 0x30)<<8)|vgaxi(Crtx, 0x2E); switch(id){
1994/0803
1998/0116		case 0xE110: /* ViRGE/GX2 */ p += scr->storage; break; default: lock(&scr->devlock); opage = s3pageset(scr, scr->storage>>16); p += (scr->storage & 0xFFFF); break; }
1994/0803		/* * The cursor is set in X11 mode which gives the following * truth table:
1998/0116		* The cursor is set in Microsoft Windows format (the ViRGE/GX2 no * longer supports the X11 format) which gives the following truth table:
1994/0803		* and xor colour * 0 0 underlying pixel colour * 0 1 underlying pixel colour * 1 0 background colour * 1 1 foreground colour
1998/0116		* 0 0 background colour * 0 1 foreground colour * 1 0 current screen pixel * 1 1 NOT current screen pixel
1994/0803		* Put the cursor into the top-left of the 64x64 array.
1994/0809		* * The cursor pattern in memory is interleaved words of
1997/1101/sys/src/9/pc/vgas3.c:181,202 – 1998/0116/sys/src/9/pc/vgas3.c:215,244
1994/0803		for(y = 0; y < 64; y++){
1994/0804		for(x = 0; x < 64/8; x += 2){ if(x < 16/8 && y < 16){
1997/1101		*p++ = curs->clr[2*y + x]|curs->set[2*y + x]; *p++ = curs->clr[2*y + x+1]|curs->set[2*y + x+1];
1998/0116		*p++ = ~(curs->clr[2*y + x]|curs->set[2*y + x]); *p++ = ~(curs->clr[2*y + x+1]|curs->set[2*y + x+1]);
1997/1101		*p++ = curs->set[2*y + x]; *p++ = curs->set[2*y + x+1];
1994/0803		} else {
1998/0116		*p++ = 0xFF; *p++ = 0xFF;
1994/0804		*p++ = 0x00; *p++ = 0x00; *p++ = 0x00; *p++ = 0x00;
1994/0803		} } }
1997/1101		s3pageset(scr, opage); unlock(&scr->devlock);
1998/0116		switch(id){ case 0xE110: /* ViRGE/GX2 */ break; default: s3pageset(scr, opage); unlock(&scr->devlock); break; }
1997/1101
1994/0803		/*
1997/1101		* Save the cursor hotpoint and enable the cursor.