96 lines
1.7 KiB
C
96 lines
1.7 KiB
C
#include <stdio.h>
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#include <i86.h>
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#include <conio.h>
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extern void __cdecl enableUnchainedVGAMode();
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extern void __cdecl enableTextMode();
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extern void __cdecl fillScreen(int);
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extern void __cdecl latchCopyCube(char offset, int writtenValue, int writeMode);
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extern int __cdecl paramTest(int wow);
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extern void __cdecl far interrupt keyboardHandler();
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extern char keyboardPressed;
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char far *VGA = (char*)0xA0000;
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#define PLANE_WIDTH (320 / 4)
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void far (interrupt *int9Save)();
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void populateExampleCube(void) {
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int y, x;
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outp(0x3c4, 0x02);
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for (y = 0; y < 16; ++y) {
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for (x = 0; x < 16; ++x) {
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outp(0x3c5, 1 << (x % 4));
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VGA[y * PLANE_WIDTH + x / 4] = y * 16 + x;
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}
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}
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}
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int main(void) {
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// activate unchained vga mode
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// set up 8 very clear colors
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// place some data into video memory to be latch copied
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// show off the following
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// * latch copies
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// * masking
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// * barrel shifting
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int i,j;
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int9Save = _dos_getvect(9);
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_dos_setvect(9, keyboardHandler);
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printf("%p\n", keyboardHandler);
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while (keyboardPressed == 0) {
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printf("%d\n", keyboardPressed);
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}
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printf("wow\n");
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delay(200);
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_dos_setvect(9, int9Save);
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return 0;
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enableUnchainedVGAMode();
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fillScreen(0);
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populateExampleCube();
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latchCopyCube(8, 0, 0x00);
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latchCopyCube(12, 127, 0x00);
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latchCopyCube(16, 0, 0x08);
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latchCopyCube(20, 127, 0x08);
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latchCopyCube(24, 0, 0x10);
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latchCopyCube(28, 127, 0x10);
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latchCopyCube(32, 0, 0x18);
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latchCopyCube(36, 127, 0x18);
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while (keyboardPressed == 0) {
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delay(1);
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}
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/*
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outp(0x3c4, 0x02);
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for (i = 0; i < 200; ++i) {
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for (j = 0; j < 4; ++j) {
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outp(0x3c5, 1 << j);
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VGA[i] = j + 1;
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}
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}
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*/
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//delay(3000);
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enableTextMode();
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}
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