41 lines
773 B
C
41 lines
773 B
C
#include <types.h>
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#include <video.h>
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void
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vga_write(s8 *sequence, s16 size, s8 flags)
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{
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if (size > VGA_TEXT_SIZE) {
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s16 using_size = size - VGA_TEXT_SIZE;
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for (s16 i = 0; i <= VGA_SIZE; i++) {
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vga_vidmem[i] = sequence[using_size + i];
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vga_vidmem[++i] = flags;
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}
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unused = 2001;
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return;
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}
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s16 needed_space = (size + unused) * 2 - VGA_SIZE;
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if (needed_space >= 0) {
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for (s16 i = 0; i <= VGA_SIZE - needed_space; i++) {
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vga_vidmem[i] = vga_vidmem[i++ + needed_space];
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}
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unused = VGA_SIZE - needed_space;
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}
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for (s16 i = 0; i < size; i++) {
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vga_vidmem[unused * 2] = sequence[i];
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vga_vidmem[(unused++ * 2) + 1] = flags;
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}
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}
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void
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vga_clearscreen(void)
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{
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for (s16 i = 0; i <= VGA_SIZE; i++) {
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vga_vidmem[i] = 0;
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}
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}
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