1996/0216/pc/vgaark2000pv.c (diff list | history)

1996/0215/sys/src/9/pc/vgaark2000pv.c:39,50 – 1996/0216/sys/src/9/pc/vgaark2000pv.c:39,50 (short | long | prev | next)
1995/0516		/* * Disable the cursor then configure for X-Windows style, * 64x64 and 4/8-bit colour depth.
1996/0216		* 32x32 and 4/8-bit colour depth.
1995/0516		* Set cursor colours for 4/8-bit. */ seq20 = vgaxi(Seqx, 0x20) & ~0x1F; vgaxo(Seqx, 0x20, seq20); seq20 |= 0x1C;
1996/0216		seq20 |= 0x18;
1995/0516		vgaxo(Seqx, 0x26, Pwhite); vgaxo(Seqx, 0x27, Pwhite);
1996/0215/sys/src/9/pc/vgaark2000pv.c:54,66 – 1996/0216/sys/src/9/pc/vgaark2000pv.c:54,66
1995/0516		vgaxo(Seqx, 0x2B, Pblack); /* * Cursor storage is a 1Kb block located in the last 16Kb * of video memory. Crt25 is the index of which 1Kb block.
1996/0216		* Cursor storage is a 256 byte or 1Kb block located in the last * 16Kb of video memory. Crt25 is the index of which block.
1995/0516		*/ storage = (vgaxi(Seqx, 0x10)>>6) & 0x03; storage = (1024*1024)<<storage; storage -= 1024; vgaxo(Seqx, 0x25, 0x3C);
1996/0216		storage -= 256; vgaxo(Seqx, 0x25, 0x3F);
1995/0516		/* * Enable the cursor.
1996/0215/sys/src/9/pc/vgaark2000pv.c:71,77 – 1996/0216/sys/src/9/pc/vgaark2000pv.c:71,77
1995/0516		static void load(Cursor *c) { uchar *p, seq20;
1996/0216		uchar *p;
1995/0516		int x, y; /*
1996/0215/sys/src/9/pc/vgaark2000pv.c:81,97 – 1996/0216/sys/src/9/pc/vgaark2000pv.c:81,93
1995/0516		* just make sure it's enabled. */ lock(&ark2000pvlock);
1995/0623		seq20 = vgaxi(Seqx, 0x20);
1995/0516		if(memcmp(c, &curcursor, sizeof(Cursor)) == 0){
1995/0623		vgaxo(Seqx, 0x20, seq20|0x08);
1996/0216		vgaxo(Seqx, 0x20, vgaxi(Seqx, 0x20)|0x08);
1995/0516		unlock(&ark2000pvlock); return; } memmove(&curcursor, c, sizeof(Cursor));
1995/0808		#ifdef notdef
1995/0623		vgaxo(Seqx, 0x20, seq20 & ~0x08);
1995/0808		#endif
1995/0516		/* * Is linear addressing turned on? This will determine * how we access the cursor storage.
1996/0215/sys/src/9/pc/vgaark2000pv.c:111,122 – 1996/0216/sys/src/9/pc/vgaark2000pv.c:107,118
1995/0516		* 0 1 underlying pixel colour * 1 0 background colour * 1 1 foreground colour * Put the cursor into the top-left of the 64x64 array.
1996/0216		* Put the cursor into the top-left of the 32x32 array.
1995/0516		* The manual doesn't say what the data layout in memory is - * this worked out by trial and error. */ for(y = 0; y < 64; y++){ for(x = 0; x < 64/8; x++){
1996/0216		for(y = 0; y < 32; y++){ for(x = 0; x < 32/8; x++){
1995/0516		if(x < 16/8 && y < 16){ *p++ = c->clr[2*y + x]|c->set[2*y + x]; *p++ = c->set[2*y + x];
1996/0215/sys/src/9/pc/vgaark2000pv.c:132,140 – 1996/0216/sys/src/9/pc/vgaark2000pv.c:128,133
1995/0516		* Set the cursor hotpoint and enable the cursor. */ hotpoint = c->offset;
1995/0808		#ifdef notdef
1995/0623		vgaxo(Seqx, 0x20, seq20|0x08);
1995/0808		#endif
1995/0516		unlock(&ark2000pvlock); }