#include (iostream)

#include (stdlib.h)

#include (dos.h)

#include (mem.h)

#include (conio.h)

unsigned char *vga = (unsigned char *) MK_FP

(0xA000, 0);

// Go into Mcga mode ($13h)


void SetMcga() {

_AX = 0x0013;

geninterrupt (0x10);

}

// Go back to text mode


void SetText() {

_AX = 0x0003;

geninterrupt (0x10);

}

//Clear the screen


void Cls(unsigned char Col) { //Color between 0 to 255


memset(vga, Col, 0xffff);

}

//Plot a pixel


void PutPixel(int x, int y, unsigned char Col) 

{ // 0 to 255


memset(vga+x+(y*320),Col,1);

}

////////////////// // Main Program // /////////////////


int loop1, loop2;

void main() {

SetMcga();

Cls(32);

getch();

Cls(90);

getc ();

Cls(5);

getch();

Cls(200);

getch();

Cls( 50);

getch();

//place pixels all around


PutPixel( 50, 100, 25 );

PutPixel( 100, 199, 50);

PutPixel( 250, 150, 75);

PutPixel( 125, 125, 100);

PutPixel( 200, 113, 125);

PutPixel( 30, 30, 150 );

PutPixel( 210, 122, 175);

PutPixel( 80, 80, 200);

PutPixel( 260, 148, 225);

PutPixel( 223, 111, 250);

getch();

//cover the screen with random pixels


for(loop1=0, loop1(320, loop1++) {

for(loop2=0, loop2(200, loop2++) {

PutPixel(loop1, loop2, rand());

}

}

getch();

Cls(0);

getch();

SetText();

rintf('Graphics test complete. Press any key to continue... ');

getch();

}