46 lines
923 B
C
46 lines
923 B
C
/*
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* vim:tabstop=4
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* vim:noexpandtab
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*
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* Bochs VBE / QEMU vga=std Graphics Driver
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*/
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#include <system.h>
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void
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graphics_install_bochs() {
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outports(0x1CE, 0x00);
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outports(0x1CF, 0xB0C4);
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short i = inports(0x1CF);
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kprintf("Bochs VBE Mode [%x]\n", (unsigned int)i);
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kprintf("Switching to GRAPHICS MODE!\n");
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timer_wait(90);
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/* Disable VBE */
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outports(0x1CE, 0x04);
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outports(0x1CF, 0x00);
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/* Set X resolution to 1024 */
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outports(0x1CE, 0x01);
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outports(0x1CF, 1024);
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/* Set Y resolution to 768 */
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outports(0x1CE, 0x02);
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outports(0x1CF, 768);
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/* Set bpp to 8 */
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outports(0x1CE, 0x03);
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outports(0x1CF, 0x20);
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/* Re-enable VBE */
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outports(0x1CE, 0x04);
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outports(0x1CF, 0x41);
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/* Let's draw some stuff */
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uint32_t * vid_mem = (uint32_t *)0xA0000;
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uint32_t x = 0;
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while (x < 1024 * 768) {
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if ((x / 1024) % 2) {
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*vid_mem = 0x00FF0000;
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} else {
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*vid_mem = krand();
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}
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++vid_mem;
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++x;
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}
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}
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