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Code: Select all

boutb( int n, int iport, int dport, char *v ) {
    int i;
    if (iport == (dport-1)) {
        for ( i = 0 ; i<n; i++) {
            outw( iport, i | ((*v++)<<8) );
        }
    } else {
        for ( i = 0 ; i<n; i++) {
            outb( iport, i );
            outb( dport, *v++ );
        }
    }
}

char VGA12Gen[] = { 0xE3, 0x04 };
char VGA12Seq[] = { 0x1, 0x1, 0xf, 0x00, 0x06 }; // 5
char VGA12Crtc[] = { 0x5F, 0x4F, 0x50, 0x82, 0x54, 0x80, 0x0B, 0x3E,
                     0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x59,
                     0xEA, 0x8C, 0xDF, 0x28, 0x00, 0xE7, 0x04, 0xE3, 0xFF }; // 25
char VGA12GC[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x0F, 0xFF }; // 9
char VGA12Attr[] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x14, 0x07,
                     0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
                     0x01, 0x00, 0x0F, 0x00, 0x00 };     // 21

int main() {
    int q;
    q = inb( 0x3da );    
    q = q;                                  // force compiler to perform the inb
    outb(0x3C0, 0);                         // disable palette
    outb(0x3C2, VGA12Gen[0]);
    outb(0x3D4, 0x11);  outb(0x3D5, 0);     // unprotect crtc regs 0-7

// Reset and set sequencer regs

    boutb(5, 0x3C4, 0x3C5, VGA12Seq );          

// set misc out reg

    outb(0x3C2, VGA12Gen[0]);

    outb( 0x3c4, 0 );
    outb( 0x3c5, 3 );                       // seq enable

// set all crtc regs

    boutb(25, 0x3D4, 0x3D5, VGA12Crtc);

// set all graphics controller regs

    outb( 0x3CC, 0);    outb( 0x3CA, 1);
    boutb(9, 0x3CE, 0x3CF, VGA12GC);

// set all attribute regs

    q = inb(0x3DA); 
    q = q;                                  // reset flip/flop
    boutb( 21, 0x3C0, 0x3C0, VGA12Attr);

    outb( 0x3C0, 0x20 );                    // enable palette
    return 0;
}

Code: Select all

#include <system.h>  

unsigned char inb (unsigned short r_port)
{
   return inportb(r_port);
}

void outb (unsigned short r_port, unsigned char r_data)
{
    return outportb(r_port, r_data);
}



void boutb( int n, int iport, int dport, char *v ) {
    int i;

        for ( i = 0 ; i<n; i++) 
		{
            outb( iport, i );
            outb( dport, *v++ );
        }
    
}

char VGA12Gen[] = { 0xE3, 0x04 };
char VGA12Seq[] = { 0x1, 0x1, 0xf, 0x00, 0x06 }; // 5
char VGA12Crtc[] = { 0x5F, 0x4F, 0x50, 0x82, 0x54, 0x80, 0x0B, 0x3E,
                     0x00, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x59,
                     0xEA, 0x8C, 0xDF, 0x28, 0x00, 0xE7, 0x04, 0xE3, 0xFF }; // 25
char VGA12GC[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x0F, 0xFF }; // 9
char VGA12Attr[] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x14, 0x07,
                     0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
                     0x01, 0x00, 0x0F, 0x00, 0x00 };     // 21





int vga_init() {
    int q;
    q = inb( 0x3da );   
    q = q;                                  // force compiler to perform the inb
    outb(0x3C0, 0);                         // disable palette
    outb(0x3C2, VGA12Gen[0]);
    outb(0x3D4, 0x11);  outb(0x3D5, 0);     // unprotect crtc regs 0-7

// Reset and set sequencer regs

    boutb(5, 0x3C4, 0x3C5, VGA12Seq );         

// set misc out reg

    outb(0x3C2, VGA12Gen[0]);

    outb( 0x3c4, 0 );
    outb( 0x3c5, 3 );                       // seq enable

// set all crtc regs

    boutb(25, 0x3D4, 0x3D5, VGA12Crtc);

// set all graphics controller regs

    outb( 0x3CC, 0);    outb( 0x3CA, 1);
    boutb(9, 0x3CE, 0x3CF, VGA12GC);

// set all attribute regs

    q = inb(0x3DA);
    q = q;                                  // reset flip/flop
    boutb( 21, 0x3C0, 0x3C0, VGA12Attr);

    outb( 0x3C0, 0x20 );                    // enable palette
    return 0;
} 

Code: Select all

void plot_pixel(int x,int y,byte color)
{
  VGA[y*320+x]=color;
}

void gen_sv()
{
	int i;

  for(i=0;i<20L;i++)               /* randomly plot 50000 pixels. */
  {
       plot_pixel(i,i,15);
  }
}