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/*
* Copyright (C) 2017 Robin Krahl <robin.krahl@ireas.org>
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*/
#include <garmos/arch.h>
#include <garmos/types.h>
#include <garmos/vga.h>
#ifndef VGA_MEMORY
#define VGA_MEMORY 0xB8000
#endif
void vga_clear(void)
{
uint32_t i;
for (i = 0; i < VGA_ROWS * VGA_COLS; i += 2)
regset8(VGA_MEMORY + i, 0);
}
void vga_pclear(uint8_t attr)
{
uint32_t i;
for (i = 0; i < VGA_ROWS * VGA_COLS; i += 2) {
regset8(VGA_MEMORY + i, 0);
regset8(VGA_MEMORY + i + 1, attr);
}
}
void vga_print(uint32_t row, uint32_t col, uint8_t c)
{
uint32_t i = 2 * (row * VGA_COLS + col);
if (row >= VGA_ROWS || col >= VGA_COLS)
return;
regset8(VGA_MEMORY + i, c);
}
void vga_pprint(uint32_t row, uint32_t col, uint8_t attr, uint8_t c)
{
uint32_t i = 2 * (row * VGA_COLS + col);
if (row >= VGA_ROWS || col >= VGA_COLS)
return;
regset8(VGA_MEMORY + i, c);
regset8(VGA_MEMORY + i + 1, attr);
}
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