1997/0716/pc/vgaclgd542x.c (diff list | history)

1997/0327/sys/src/9/pc/vgaclgd542x.c:9,15 – 1997/0716/sys/src/9/pc/vgaclgd542x.c:9,19 (short | long | prev | next)
1995/02021		#include "screen.h" #include "vga.h"
1997/0716		extern Bitmap gscreen; extern Cursor curcursor;
1997/0327		static Lock clgd542xlock;
1997/0716		static ulong storage;
1997/0327
1995/02021		static void clgd542xpage(int page)
1997/0327/sys/src/9/pc/vgaclgd542x.c:19,24 – 1997/0716/sys/src/9/pc/vgaclgd542x.c:23,227
1997/0327		unlock(&clgd542xlock);
1995/02021		}
1997/0716		static void disable(void) { uchar sr12; lock(&clgd542xlock); sr12 = vgaxi(Seqx, 0x12); vgaxo(Seqx, 0x12, sr12 & ~0x01); unlock(&clgd542xlock); } static void enable(void) { uchar sr12; /* * Disable the cursor. */ lock(&clgd542xlock); sr12 = vgaxi(Seqx, 0x12); vgaxo(Seqx, 0x12, sr12 & ~0x01); /* * Cursor colours. */ vgaxo(Seqx, 0x12, sr12|0x02); setcolor(0x00, Pwhite<<(32-6), Pwhite<<(32-6), Pwhite<<(32-6)); setcolor(0x0F, Pblack<<(32-6), Pblack<<(32-6), Pblack<<(32-6)); vgaxo(Seqx, 0x12, sr12); /* * Memory size. The BIOS leaves this in Seq0A, bits 4 and 3. * See Technical Reference Manual Appendix E1, Section 1.3.2. * * The storage area for the 64x64 cursors is the last 16Kb of * display memory. */ switch((vgaxi(Seqx, 0x0A)>>3) & 0x03){ case 0: storage = (256-16)*1024; break; case 1: storage = (512-16)*1024; break; case 2: storage = (1024-16)*1024; break; case 3: storage = (2048-16)*1024; break; } /* * Set the current cursor to index 0 * and turn the 64x64 cursor on. */ vgaxo(Seqx, 0x13, 0); vgaxo(Seqx, 0x12, sr12|0x05); unlock(&clgd542xlock); } static void initcursor(Cursor* c, int xo, int yo, int index) { uchar *p; uint p0, p1; int x, y; /* * Is linear addressing turned on? This will determine * how we access the cursor storage. */ if(vgaxi(Seqx, 0x07) & 0xF0) p = ((uchar*)gscreen.base) + storage; else { vgaxo(Grx, 0x09, (storage>>16)<<4); p = ((uchar*)gscreen.base) + (storage & 0xFFFF); } p += index*1024; for(y = yo; y < 16; y++){ p0 = c->clr[2*y]; p1 = c->clr[2*y+1]; if(xo){ p0 = (p0<<xo)|(p1>>(8-xo)); p1 <<= xo; } *p++ = p0; *p++ = p1; for(x = 16; x < 64; x += 8) *p++ = 0x00; p0 = c->clr[2*y]|c->set[2*y]; p1 = c->clr[2*y+1]|c->set[2*y+1]; if(xo){ p0 = (p0<<xo)|(p1>>(8-xo)); p1 <<= xo; } *p++ = p0; *p++ = p1; for(x = 16; x < 64; x += 8) *p++ = 0x00; } while(y < 64+yo){ for(x = 0; x < 64; x += 8){ *p++ = 0x00; *p++ = 0x00; } y++; } } static void load(Cursor* c) { uchar sr12; /* * Lock the display memory so we can update the * cursor bitmap if necessary. * Disable the cursor. * If it's the same as the last cursor loaded, * just make sure it's enabled and index 0. */ lock(&clgd542xlock); sr12 = vgaxi(Seqx, 0x12); vgaxo(Seqx, 0x12, sr12 & ~0x01); if(memcmp(c, &curcursor, sizeof(Cursor)) == 0){ vgaxo(Seqx, 0x13, 0); vgaxo(Seqx, 0x12, sr12|0x05); unlock(&clgd542xlock); return; } memmove(&curcursor, c, sizeof(Cursor)); initcursor(c, 0, 0, 0); /* * Enable the cursor. */ vgaxo(Seqx, 0x13, 0); vgaxo(Seqx, 0x12, sr12|0x05); unlock(&clgd542xlock); } static int move(Point p) { int index, x, xo, y, yo; if(canlock(&clgd542xlock) == 0) return 1; index = 0; if((x = p.x+curcursor.offset.x) < 0){ xo = -x; x = 0; } else xo = 0; if((y = p.y+curcursor.offset.y) < 0){ yo = -y; y = 0; } else yo = 0; if(xo || yo){ initcursor(&curcursor, xo, yo, 1); index = 1; } vgaxo(Seqx, 0x13, index<<2); vgaxo(Seqx, 0x10|((x & 0x07)<<5), (x>>3) & 0xFF); vgaxo(Seqx, 0x11|((y & 0x07)<<5), (y>>3) & 0xFF); unlock(&clgd542xlock); return 0; } static Hwgc clgd542xhwgc = { "clgd542xhwgc", enable, load, move, disable, 0, };
1995/02021		static Vgac clgd542x = { "clgd542x", clgd542xpage,
1997/0327/sys/src/9/pc/vgaclgd542x.c:30,33 – 1997/0716/sys/src/9/pc/vgaclgd542x.c:233,237
1995/02021		vgaclgd542xlink(void) { addvgaclink(&clgd542x);
1997/0716		addhwgclink(&clgd542xhwgc);
1995/02021		}