1991/1113/pc/vga.c (diff list | history)

pc/vga.c on 1991/0723
1991/0723		#include "u.h" #include "lib.h" #include "mem.h" #include "dat.h" #include "fns.h" #include "io.h"
1991/0730		#include <libg.h> #include <gnot.h> #include "screen.h" #define MINX 8 extern GFont defont0; GFont *defont; struct{ Point pos; int bwid; }out; /* * screen dimensions */ #define MAXX 640 #define MAXY 480 #define SCREENMEM (0xA0000 | KZERO) GBitmap gscreen = { (ulong*)SCREENMEM, 0, 640/32, 0, 0, 0, MAXX, MAXY, 0 };
1991/0723		enum {
1991/1112		EMISCR= 0x3CC, /* control sync polarity */ EMISCW= 0x3C2, EFCW= 0x3DA, /* feature control */ EFCR= 0x3CA,
1991/0723		GRX= 0x3CE, /* index to graphics registers */
1991/0727		GR= 0x3CF, /* graphics registers */ Grms= 0x04, /* read map select register */
1991/0724		SRX= 0x3C4, /* index to sequence registers */
1991/0727		SR= 0x3C5, /* sequence registers */ Smmask= 0x02, /* map mask */ CRX= 0x3D4, /* index to crt registers */ CR= 0x3D5, /* crt registers */
1991/1109		Cvre= 0x11, /* vertical retrace end */
1991/0727		ARX= 0x3C0, /* index to attribute registers */ AR= 0x3C1, /* attribute registers */
1991/0723		};
1991/1113		typedef struct VGAmode VGAmode; struct VGAmode { uchar general[4]; uchar sequencer[5]; uchar crt[0x19]; uchar graphics[9]; uchar attribute[0x15]; };
1991/0727		/*
1991/1113		* 640x480 display, 16 bit color
1991/0727		*/
1991/1113		VGAmode mode12 = { /* general */ 0xe3, 0x00, 0x70, 0x04, /* sequence */ 0x03, 0x01, 0x0f, 0x00, 0x06, /* crt */ 0x5f, 0x4f, 0x50, 0x82, 0x54, 0x80, 0x0b, 0x3e, 0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x59, 0xea, 0x0c, 0xdf, 0x28, 0x00, 0xe7, 0x04, 0xe3, 0xff, /* graphics */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x0f, 0xff, /* attribute */ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x14, 0x07, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, 0x01, 0x00, 0x0f, 0x00, 0x00, };
1991/0724		void
1991/1113		genout(int reg, int val) { if(reg == 0) outb(EMISCW, val); else if (reg == 1) outb(EFCW, val); } void
1991/0724		srout(int reg, int val) { outb(SRX, reg); outb(SR, val); } void grout(int reg, int val) { outb(GRX, reg); outb(GR, val); }
1991/0727		void arout(int reg, int val) { inb(0x3DA); outb(ARX, reg | 0x20); outb(AR, val); } void crout(int reg, int val) { outb(CRX, reg); outb(CR, val); }
1991/1107
1991/0723		/*
1991/0727		* m is a bit mask of planes to be affected by CPU writes
1991/0723		*/
1991/0727		vgawrmask(int m) { srout(Smmask, m&0xf); } /* * p is the plane that will respond to CPU reads */ vgardplane(int p) { grout(Grms, p&3); }
1991/1112		vgadump(void) { print("misc is 0x%ux fc is 0x%ux\n", inb(EMISCR), inb(EFCR)); }
1991/1113		void setmode(VGAmode *v)
1991/1112		{
1991/1113		int i;
1991/1112
1991/1113		for(i = 0; i < sizeof(v->general); i++) genout(i, v->general[i]);
1991/0928
1991/1113		for(i = 0; i < sizeof(v->sequencer); i++) srout(i, v->sequencer[i]);
1991/0928
1991/1113		crout(Cvre, 0); /* allow writes to CRT registers 0-7 */ for(i = 0; i < sizeof(v->crt); i++) crout(i, v->crt[i]);
1991/1109
1991/1113		for(i = 0; i < sizeof(v->graphics); i++) grout(i, v->graphics[i]);
1991/1109
1991/1113		for(i = 0; i < sizeof(v->attribute); i++) arout(i, v->attribute[i]);
1991/0928		}
1991/0727		void
1991/0730		screeninit(void)
1991/0723		{
1991/0727		int i, j, k; int c;
1991/0730		ulong *l;
1991/0723
1991/1113		setmode(&mode12); bigcursor();
1991/0929
1991/0727		/*
1991/0801		* swizzle the font longs.
1991/0921		* we do it here since the font is initialized with big * endian longs.
1991/0801		*/ defont = &defont0; l = defont->bits->base; for(i = defont->bits->width*Dy(defont->bits->r); i > 0; i--, l++) *l = (*l<<24) | ((*l>>8)&0x0000ff00) | ((*l<<8)&0x00ff0000) | (*l>>24); gbitblt(&gscreen, Pt(0, 0), &gscreen, gscreen.r, flipD[0]);
1991/0730		out.pos.x = MINX; out.pos.y = 0; out.bwid = defont0.info[' '].width;
1991/0723		}
1991/0727
1991/0730		void screenputc(int c) { char buf[2]; int nx; if(c == '\n'){ out.pos.x = MINX; out.pos.y += defont0.height; if(out.pos.y > gscreen.r.max.y-defont0.height) out.pos.y = gscreen.r.min.y; gbitblt(&gscreen, Pt(0, out.pos.y), &gscreen,
1991/0801		Rect(0, out.pos.y, gscreen.r.max.x, out.pos.y+2*defont0.height), flipD[0]);
1991/0730		}else if(c == '\t'){ out.pos.x += (8-((out.pos.x-MINX)/out.bwid&7))*out.bwid; if(out.pos.x >= gscreen.r.max.x) screenputc('\n'); }else if(c == '\b'){ if(out.pos.x >= out.bwid+MINX){ out.pos.x -= out.bwid; screenputc(' '); out.pos.x -= out.bwid; } }else{ if(out.pos.x >= gscreen.r.max.x-out.bwid) screenputc('\n'); buf[0] = c&0x7F; buf[1] = 0;
1991/0801		out.pos = gstring(&gscreen, out.pos, defont, buf, flipD[S]);
1991/0730		} } void screenputs(char *s, int n) { while(n-- > 0) screenputc(*s++); } int screenbits(void) { return 1; /* bits per pixel */ } void getcolor(ulong p, ulong *pr, ulong *pg, ulong *pb) { ulong ans; /*
1991/0731		* The safari monochrome says 0 is black (zero intensity)
1991/0730		*/ if(p == 0) ans = 0; else ans = ~0; *pr = *pg = *pb = ans; } int setcolor(ulong p, ulong r, ulong g, ulong b) { return 0; /* can't change mono screen colormap */ } int hwcursset(uchar *s, uchar *c, int ox, int oy) { return 0; } int hwcursmove(int x, int y) { return 0; } void
1991/0904		mouseclock(void)
1991/0730		{ mouseupdate(1);
1991/0927		} vgaset(char *cmd) { int set; int reg; int val; set = *cmd++; cmd++; reg = strtoul(cmd, &cmd, 0); cmd++; val = strtoul(cmd, &cmd, 0); switch(set){ case 'a': arout(reg, val); break; case 'g': grout(reg, val); break; case 'c': crout(reg, val); break; case 's': srout(reg, val); break; }
1991/1113		} /* * a fatter than usual cursor for the safari */ Cursor fatarrow = { { -1, -1 }, { 0xff, 0xff, 0x80, 0x01, 0x80, 0x02, 0x80, 0x0c, 0x80, 0x10, 0x80, 0x10, 0x80, 0x08, 0x80, 0x04, 0x80, 0x02, 0x80, 0x01, 0x80, 0x02, 0x8c, 0x04, 0x92, 0x08, 0x91, 0x10, 0xa0, 0xa0, 0xc0, 0x40, }, { 0x00, 0x00, 0x7f, 0xfe, 0x7f, 0xfc, 0x7f, 0xf0, 0x7f, 0xe0, 0x7f, 0xe0, 0x7f, 0xf0, 0x7f, 0xf8, 0x7f, 0xfc, 0x7f, 0xfe, 0x7f, 0xfc, 0x73, 0xf8, 0x61, 0xf0, 0x60, 0xe0, 0x40, 0x40, 0x00, 0x00, }, }; void bigcursor(void) { extern Cursor arrow; memmove(&arrow, &fatarrow, sizeof(fatarrow));
1991/0730		}