262 lines
4.9 KiB
C
262 lines
4.9 KiB
C
#include "u.h"
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#include "../port/lib.h"
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#include "mem.h"
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#include "dat.h"
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#include "fns.h"
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#include "io.h"
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#include "../port/error.h"
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#define Image IMAGE
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#include <draw.h>
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#include <memdraw.h>
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#include <cursor.h>
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#include "screen.h"
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static Memimage *conscol;
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static Memimage *back;
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static Point curpos;
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static Rectangle window;
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static int *xp;
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static int xbuf[256];
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Lock vgascreenlock;
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int drawdebug;
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void
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vgaimageinit(ulong)
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{
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conscol = memblack;
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back = memwhite;
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}
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static void
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vgascroll(VGAscr* scr)
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{
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int h, o;
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Point p;
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Rectangle r;
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h = scr->memdefont->height;
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o = 8*h;
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r = Rpt(window.min, Pt(window.max.x, window.max.y-o));
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p = Pt(window.min.x, window.min.y+o);
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memimagedraw(scr->gscreen, r, scr->gscreen, p, nil, p, S);
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r = Rpt(Pt(window.min.x, window.max.y-o), window.max);
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memimagedraw(scr->gscreen, r, back, ZP, nil, ZP, S);
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curpos.y -= o;
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}
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static void
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vgascreenputc(VGAscr* scr, char* buf, Rectangle *flushr)
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{
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Point p;
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int h, w, pos;
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Rectangle r;
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if(xp < xbuf || xp >= &xbuf[sizeof(xbuf)])
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xp = xbuf;
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h = scr->memdefont->height;
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switch(buf[0]){
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case '\n':
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if(curpos.y+h >= window.max.y){
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vgascroll(scr);
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*flushr = window;
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}
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curpos.y += h;
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vgascreenputc(scr, "\r", flushr);
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break;
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case '\r':
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xp = xbuf;
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curpos.x = window.min.x;
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break;
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case '\t':
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p = memsubfontwidth(scr->memdefont, " ");
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w = p.x;
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if(curpos.x >= window.max.x-4*w)
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vgascreenputc(scr, "\n", flushr);
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pos = (curpos.x-window.min.x)/w;
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pos = 4-(pos%4);
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*xp++ = curpos.x;
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r = Rect(curpos.x, curpos.y, curpos.x+pos*w, curpos.y + h);
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memimagedraw(scr->gscreen, r, back, ZP, nil, ZP, S);
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curpos.x += pos*w;
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break;
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case '\b':
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if(xp <= xbuf)
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break;
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xp--;
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r = Rect(*xp, curpos.y, curpos.x, curpos.y+h);
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memimagedraw(scr->gscreen, r, back, r.min, nil, ZP, S);
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combinerect(flushr, r);
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curpos.x = *xp;
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break;
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case '\0':
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break;
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default:
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p = memsubfontwidth(scr->memdefont, buf);
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w = p.x;
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if(curpos.x >= window.max.x-w)
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vgascreenputc(scr, "\n", flushr);
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*xp++ = curpos.x;
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r = Rect(curpos.x, curpos.y, curpos.x+w, curpos.y+h);
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memimagedraw(scr->gscreen, r, back, r.min, nil, ZP, S);
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memimagestring(scr->gscreen, curpos, conscol, ZP, scr->memdefont, buf);
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combinerect(flushr, r);
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curpos.x += w;
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}
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}
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static void
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vgascreenputs(char* s, int n)
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{
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int i, gotdraw;
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Rune r;
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char buf[4];
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VGAscr *scr;
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Rectangle flushr;
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scr = &vgascreen[0];
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if(!islo()){
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/*
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* Don't deadlock trying to
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* print in an interrupt.
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*/
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if(!canlock(&vgascreenlock))
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return;
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}
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else
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lock(&vgascreenlock);
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/*
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* Be nice to hold this, but not going to deadlock
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* waiting for it. Just try and see.
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*/
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gotdraw = canqlock(&drawlock);
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flushr = Rect(10000, 10000, -10000, -10000);
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while(n > 0){
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i = chartorune(&r, s);
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memmove(buf, s, i);
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buf[i] = 0;
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n -= i;
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s += i;
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vgascreenputc(scr, buf, &flushr);
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}
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flushmemscreen(flushr);
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if(gotdraw)
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qunlock(&drawlock);
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unlock(&vgascreenlock);
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}
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static Memimage*
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mkcolor(Memimage *screen, ulong color)
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{
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Memimage *i;
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if(i = allocmemimage(Rect(0,0,1,1), screen->chan)){
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i->flags |= Frepl;
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i->clipr = screen->r;
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memfillcolor(i, color);
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}
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return i;
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}
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void
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vgascreenwin(VGAscr* scr)
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{
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Memimage *i;
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Rectangle r;
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Point p;
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int h;
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qlock(&drawlock);
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h = scr->memdefont->height;
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r = scr->gscreen->r;
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if(i = mkcolor(scr->gscreen, 0x444488FF)){
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memimagedraw(scr->gscreen, r, i, ZP, nil, ZP, S);
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freememimage(i);
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}
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window = insetrect(r, 20);
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memimagedraw(scr->gscreen, window, conscol, ZP, memopaque, ZP, S);
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window = insetrect(window, 4);
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memimagedraw(scr->gscreen, window, back, ZP, memopaque, ZP, S);
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if(i = mkcolor(scr->gscreen, 0xAAAAAAFF)){
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memimagedraw(scr->gscreen, Rect(window.min.x, window.min.y,
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window.max.x, window.min.y+h+5+6), i, ZP, nil, ZP, S);
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freememimage(i);
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window = insetrect(window, 5);
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p = addpt(window.min, Pt(10, 0));
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memimagestring(scr->gscreen, p, memblack, ZP, scr->memdefont, " Plan 9 Console ");
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window.min.y += h+6;
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} else
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window = insetrect(window, 5);
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window.max.y = window.min.y+(Dy(window)/h)*h;
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curpos = window.min;
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flushmemscreen(r);
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qunlock(&drawlock);
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screenputs = vgascreenputs;
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}
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/*
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* Supposedly this is the way to turn DPMS
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* monitors off using just the VGA registers.
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* Unfortunately, it seems to mess up the video mode
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* on the cards I've tried.
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*/
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void
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vgablank(VGAscr*, int blank)
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{
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uchar seq1, crtc17;
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if(blank) {
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seq1 = 0x00;
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crtc17 = 0x80;
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} else {
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seq1 = 0x20;
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crtc17 = 0x00;
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}
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outs(Seqx, 0x0100); /* synchronous reset */
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seq1 |= vgaxi(Seqx, 1) & ~0x20;
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vgaxo(Seqx, 1, seq1);
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crtc17 |= vgaxi(Crtx, 0x17) & ~0x80;
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delay(10);
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vgaxo(Crtx, 0x17, crtc17);
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outs(Crtx, 0x0300); /* end synchronous reset */
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}
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void
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addvgaseg(char *name, ulong pa, ulong size)
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{
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Physseg seg;
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memset(&seg, 0, sizeof seg);
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seg.attr = SG_PHYSICAL;
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seg.name = name;
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seg.pa = pa;
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seg.size = size;
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addphysseg(&seg);
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}
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