54 lines
873 B
C
54 lines
873 B
C
#include <stdio.h>
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#include <math.h>
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char *vram=(char *)0xa0000000L;
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main()
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{
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FILE *f1;
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char *vp;
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int a,b,c,r,x,y;
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double l1,l2;
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_asm mov ax,13h
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_asm int 10h
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outp(0x3c8,0);
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for(a=0;a<8;a++)
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{
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outp(0x3c9,a*8);
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outp(0x3c9,a*8);
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outp(0x3c9,a*8);
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}
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for(y=0;y<200;y++) for(x=0;x<320;x++)
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{
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a=((long)((x-160)*(long)(320-y)+1600L)/3200L)&1;
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vram[x+y*320]=a;
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}
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c=1;
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f1=fopen("pic3.ega","wb");
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for(y=0;y<200;y++)
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{
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for(c=1;c<=4;c<<=1)
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{
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for(x=0;x<320;x+=8)
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{
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vp=vram+x+y*320;
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a=0;
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if(vp[0]&c) a|=128;
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if(vp[1]&c) a|=64;
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if(vp[2]&c) a|=32;
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if(vp[3]&c) a|=16;
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if(vp[4]&c) a|=8;
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if(vp[5]&c) a|=4;
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if(vp[6]&c) a|=2;
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if(vp[7]&c) a|=1;
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putc(a,f1);
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}
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}
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vram[y*320]=15;
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vram[y*320+1]=0;
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}
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fclose(f1);
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getch();
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_asm mov ax,3
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_asm int 10h
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}
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