1992/0603/pc/devvga.c (diff list | history)

1992/0529/sys/src/9/pc/devvga.c:6,11 – 1992/0603/sys/src/9/pc/devvga.c:6,13 (short | long | prev | next)
1992/0527		#include "io.h" #include "../port/error.h"
1992/0603		#include <libg.h> #include <gnot.h>
1992/0527		#include "devtab.h"
1992/0528		#include "vga.h"
1992/0527
1992/0529/sys/src/9/pc/devvga.c:128,143 – 1992/0603/sys/src/9/pc/devvga.c:130,144
1992/0527		case Qvgatype: return readstr(offset, buf, n, vgacard); case Qvgasize: sprint(obuf, "%dx%d%x%d %s", screeninfo.maxx, screeninfo.maxy,
1992/0528		(screeninfo.packed == 0) ? 256 : 16, (screeninfo.interlaced != 0) ? "interlaced" : "non-interlaced");
1992/0603		sprint(obuf, "%d %d", gscreen.r.max.x, gscreen.r.max.y);
1992/0527		return readstr(offset, buf, n, obuf);
1992/0528		case Qvgaport: if (offset + n >= 0x8000) error(Ebadarg); for (port=offset; port<offset+n; port++)
1992/0603		for (port=offset; port<offset+n; port++) {
1992/0528		*cp++ = inb(port);
1992/0603		}
1992/0528		return n;
1992/0527		} }
1992/0529/sys/src/9/pc/devvga.c:145,153 – 1992/0603/sys/src/9/pc/devvga.c:146,153
1992/0527		long
1992/0528		vgawrite(Chan *c, void *buf, long n, ulong offset)
1992/0527		{
1992/0528		uchar *cp = buf; void (*outfunc)(int, int); int port, i;
1992/0603		char cbuf[20], *cp; int port, i, maxx, maxy;
1992/0528
1992/0527		switch(c->qid.path&~CHDIR){ case Qdir:
1992/0529/sys/src/9/pc/devvga.c:163,174 – 1992/0603/sys/src/9/pc/devvga.c:163,187
1992/0527		case Qvgasize:
1992/0528		if(offset != 0) error(Ebadarg); error(Eperm);
1992/0603		if(n >= sizeof cbuf) n = sizeof cbuf - 1; memmove(cbuf, buf, n); cbuf[n-1] = 0; cp = cbuf; maxx = strtoul(cp, &cp, 0); maxy = strtoul(cp, &cp, 0); if (maxx == 0 || maxy == 0 || maxx > 1280 || maxy > 1024) error(Ebadarg); setscreen(maxx, maxy, 1); return n;
1992/0528		case Qvgaport:
1992/0603		cp = buf;
1992/0528		if (offset + n >= 0x8000) error(Ebadarg); for (port=offset; port<offset+n; port++)
1992/0603		for (port=offset; port<offset+n; port++) {
1992/0528		outb(port, *cp++);
1992/0603		}
1992/0528		return n;
1992/0527		} }