54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
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/*
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Set mode to VESA mode 3 (80x25 text mode)
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*/
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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#include <sys/io.h>
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#include <sys/kd.h>
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#include <sys/stat.h>
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#include "lrmi.h"
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void set_vesa_mode(int mode){
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struct LRMI_regs r;
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memset(&r, 0, sizeof(r));
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r.eax = 0x4f02;
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r.ebx = mode;
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if (!LRMI_int(0x10, &r))
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{
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fprintf(stderr, "Can't set video mode (vm86 failure)\n");
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}
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}
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int main(int argc, char *argv[]){
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int i;
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if((argc>1)&&(!strcmp(argv[1],"-h"))){
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printf("Usage: mode3 [ modenum [ font ] ]\n"
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"\n"
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"uses VESA bios to set video mode to modenum (3 by default)\n"
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"if font is given, uses setfont to change the screen font\n\n");
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return 0;
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};
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if (!LRMI_init())
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return 1;
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ioperm(0, 0x400, 1);
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iopl(3);
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i=3;
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if(argc>1){
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sscanf(argv[1],"%i",&i);
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if((i<=0))i=3;
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};
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set_vesa_mode(i);
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if(argc>2){
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execlp("setfont",argv[2],NULL);
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return 1;
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};
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return 0;
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}
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