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reactos/subsystems/mvdm/ntvdm/hardware/video/svga.c

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/*
* COPYRIGHT: GPL - See COPYING in the top level directory
* PROJECT: ReactOS Virtual DOS Machine
* FILE: subsystems/mvdm/ntvdm/hardware/video/svga.c
* PURPOSE: SuperVGA hardware emulation (Cirrus Logic CL-GD5434 compatible)
* PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
*/
/* INCLUDES *******************************************************************/
#include "ntvdm.h"
#define NDEBUG
#include <debug.h>
#include "emulator.h"
#include "svga.h"
#include <bios/vidbios.h>
#include "memory.h"
#include "io.h"
#include "clock.h"
#include "../../console/video.h"
/* PRIVATE VARIABLES **********************************************************/
#define WRAP_OFFSET(x) ((VgaCrtcRegisters[SVGA_CRTC_EXT_DISPLAY_REG] & SVGA_CRTC_EXT_ADDR_WRAP) \
? ((x) & 0xFFFFF) : LOWORD(x))
static CONST DWORD MemoryBase[] = { 0xA0000, 0xA0000, 0xB0000, 0xB8000 };
static CONST DWORD MemorySize[] = { 0x20000, 0x10000, 0x08000, 0x08000 };
#define USE_REACTOS_COLORS
// #define USE_DOSBOX_COLORS
#if defined(USE_REACTOS_COLORS)
// ReactOS colors
static CONST COLORREF VgaDefaultPalette[VGA_MAX_COLORS] =
{
RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0xAA), RGB(0x00, 0xAA, 0x00), RGB(0x00, 0xAA, 0xAA),
RGB(0xAA, 0x00, 0x00), RGB(0xAA, 0x00, 0xAA), RGB(0xAA, 0x55, 0x00), RGB(0xAA, 0xAA, 0xAA),
RGB(0x55, 0x55, 0x55), RGB(0x55, 0x55, 0xFF), RGB(0x55, 0xFF, 0x55), RGB(0x55, 0xFF, 0xFF),
RGB(0xFF, 0x55, 0x55), RGB(0xFF, 0x55, 0xFF), RGB(0xFF, 0xFF, 0x55), RGB(0xFF, 0xFF, 0xFF),
RGB(0x00, 0x00, 0x00), RGB(0x10, 0x10, 0x10), RGB(0x20, 0x20, 0x20), RGB(0x35, 0x35, 0x35),
RGB(0x45, 0x45, 0x45), RGB(0x55, 0x55, 0x55), RGB(0x65, 0x65, 0x65), RGB(0x75, 0x75, 0x75),
RGB(0x8A, 0x8A, 0x8A), RGB(0x9A, 0x9A, 0x9A), RGB(0xAA, 0xAA, 0xAA), RGB(0xBA, 0xBA, 0xBA),
RGB(0xCA, 0xCA, 0xCA), RGB(0xDF, 0xDF, 0xDF), RGB(0xEF, 0xEF, 0xEF), RGB(0xFF, 0xFF, 0xFF),
RGB(0x00, 0x00, 0xFF), RGB(0x41, 0x00, 0xFF), RGB(0x82, 0x00, 0xFF), RGB(0xBE, 0x00, 0xFF),
RGB(0xFF, 0x00, 0xFF), RGB(0xFF, 0x00, 0xBE), RGB(0xFF, 0x00, 0x82), RGB(0xFF, 0x00, 0x41),
RGB(0xFF, 0x00, 0x00), RGB(0xFF, 0x41, 0x00), RGB(0xFF, 0x82, 0x00), RGB(0xFF, 0xBE, 0x00),
RGB(0xFF, 0xFF, 0x00), RGB(0xBE, 0xFF, 0x00), RGB(0x82, 0xFF, 0x00), RGB(0x41, 0xFF, 0x00),
RGB(0x00, 0xFF, 0x00), RGB(0x00, 0xFF, 0x41), RGB(0x00, 0xFF, 0x82), RGB(0x00, 0xFF, 0xBE),
RGB(0x00, 0xFF, 0xFF), RGB(0x00, 0xBE, 0xFF), RGB(0x00, 0x82, 0xFF), RGB(0x00, 0x41, 0xFF),
RGB(0x82, 0x82, 0xFF), RGB(0x9E, 0x82, 0xFF), RGB(0xBE, 0x82, 0xFF), RGB(0xDF, 0x82, 0xFF),
RGB(0xFF, 0x82, 0xFF), RGB(0xFF, 0x82, 0xDF), RGB(0xFF, 0x82, 0xBE), RGB(0xFF, 0x82, 0x9E),
RGB(0xFF, 0x82, 0x82), RGB(0xFF, 0x9E, 0x82), RGB(0xFF, 0xBE, 0x82), RGB(0xFF, 0xDF, 0x82),
RGB(0xFF, 0xFF, 0x82), RGB(0xDF, 0xFF, 0x82), RGB(0xBE, 0xFF, 0x82), RGB(0x9E, 0xFF, 0x82),
RGB(0x82, 0xFF, 0x82), RGB(0x82, 0xFF, 0x9E), RGB(0x82, 0xFF, 0xBE), RGB(0x82, 0xFF, 0xDF),
RGB(0x82, 0xFF, 0xFF), RGB(0x82, 0xDF, 0xFF), RGB(0x82, 0xBE, 0xFF), RGB(0x82, 0x9E, 0xFF),
RGB(0xBA, 0xBA, 0xFF), RGB(0xCA, 0xBA, 0xFF), RGB(0xDF, 0xBA, 0xFF), RGB(0xEF, 0xBA, 0xFF),
RGB(0xFF, 0xBA, 0xFF), RGB(0xFF, 0xBA, 0xEF), RGB(0xFF, 0xBA, 0xDF), RGB(0xFF, 0xBA, 0xCA),
RGB(0xFF, 0xBA, 0xBA), RGB(0xFF, 0xCA, 0xBA), RGB(0xFF, 0xDF, 0xBA), RGB(0xFF, 0xEF, 0xBA),
RGB(0xFF, 0xFF, 0xBA), RGB(0xEF, 0xFF, 0xBA), RGB(0xDF, 0xFF, 0xBA), RGB(0xCA, 0xFF, 0xBA),
RGB(0xBA, 0xFF, 0xBA), RGB(0xBA, 0xFF, 0xCA), RGB(0xBA, 0xFF, 0xDF), RGB(0xBA, 0xFF, 0xEF),
RGB(0xBA, 0xFF, 0xFF), RGB(0xBA, 0xEF, 0xFF), RGB(0xBA, 0xDF, 0xFF), RGB(0xBA, 0xCA, 0xFF),
RGB(0x00, 0x00, 0x71), RGB(0x1C, 0x00, 0x71), RGB(0x39, 0x00, 0x71), RGB(0x55, 0x00, 0x71),
RGB(0x71, 0x00, 0x71), RGB(0x71, 0x00, 0x55), RGB(0x71, 0x00, 0x39), RGB(0x71, 0x00, 0x1C),
RGB(0x71, 0x00, 0x00), RGB(0x71, 0x1C, 0x00), RGB(0x71, 0x39, 0x00), RGB(0x71, 0x55, 0x00),
RGB(0x71, 0x71, 0x00), RGB(0x55, 0x71, 0x00), RGB(0x39, 0x71, 0x00), RGB(0x1C, 0x71, 0x00),
RGB(0x00, 0x71, 0x00), RGB(0x00, 0x71, 0x1C), RGB(0x00, 0x71, 0x39), RGB(0x00, 0x71, 0x55),
RGB(0x00, 0x71, 0x71), RGB(0x00, 0x55, 0x71), RGB(0x00, 0x39, 0x71), RGB(0x00, 0x1C, 0x71),
RGB(0x39, 0x39, 0x71), RGB(0x45, 0x39, 0x71), RGB(0x55, 0x39, 0x71), RGB(0x61, 0x39, 0x71),
RGB(0x71, 0x39, 0x71), RGB(0x71, 0x39, 0x61), RGB(0x71, 0x39, 0x55), RGB(0x71, 0x39, 0x45),
RGB(0x71, 0x39, 0x39), RGB(0x71, 0x45, 0x39), RGB(0x71, 0x55, 0x39), RGB(0x71, 0x61, 0x39),
RGB(0x71, 0x71, 0x39), RGB(0x61, 0x71, 0x39), RGB(0x55, 0x71, 0x39), RGB(0x45, 0x71, 0x39),
RGB(0x39, 0x71, 0x39), RGB(0x39, 0x71, 0x45), RGB(0x39, 0x71, 0x55), RGB(0x39, 0x71, 0x61),
RGB(0x39, 0x71, 0x71), RGB(0x39, 0x61, 0x71), RGB(0x39, 0x55, 0x71), RGB(0x39, 0x45, 0x71),
RGB(0x51, 0x51, 0x71), RGB(0x59, 0x51, 0x71), RGB(0x61, 0x51, 0x71), RGB(0x69, 0x51, 0x71),
RGB(0x71, 0x51, 0x71), RGB(0x71, 0x51, 0x69), RGB(0x71, 0x51, 0x61), RGB(0x71, 0x51, 0x59),
RGB(0x71, 0x51, 0x51), RGB(0x71, 0x59, 0x51), RGB(0x71, 0x61, 0x51), RGB(0x71, 0x69, 0x51),
RGB(0x71, 0x71, 0x51), RGB(0x69, 0x71, 0x51), RGB(0x61, 0x71, 0x51), RGB(0x59, 0x71, 0x51),
RGB(0x51, 0x71, 0x51), RGB(0x51, 0x71, 0x59), RGB(0x51, 0x71, 0x61), RGB(0x51, 0x71, 0x69),
RGB(0x51, 0x71, 0x71), RGB(0x51, 0x69, 0x71), RGB(0x51, 0x61, 0x71), RGB(0x51, 0x59, 0x71),
RGB(0x00, 0x00, 0x41), RGB(0x10, 0x00, 0x41), RGB(0x20, 0x00, 0x41), RGB(0x31, 0x00, 0x41),
RGB(0x41, 0x00, 0x41), RGB(0x41, 0x00, 0x31), RGB(0x41, 0x00, 0x20), RGB(0x41, 0x00, 0x10),
RGB(0x41, 0x00, 0x00), RGB(0x41, 0x10, 0x00), RGB(0x41, 0x20, 0x00), RGB(0x41, 0x31, 0x00),
RGB(0x41, 0x41, 0x00), RGB(0x31, 0x41, 0x00), RGB(0x20, 0x41, 0x00), RGB(0x10, 0x41, 0x00),
RGB(0x00, 0x41, 0x00), RGB(0x00, 0x41, 0x10), RGB(0x00, 0x41, 0x20), RGB(0x00, 0x41, 0x31),
RGB(0x00, 0x41, 0x41), RGB(0x00, 0x31, 0x41), RGB(0x00, 0x20, 0x41), RGB(0x00, 0x10, 0x41),
RGB(0x20, 0x20, 0x41), RGB(0x28, 0x20, 0x41), RGB(0x31, 0x20, 0x41), RGB(0x39, 0x20, 0x41),
RGB(0x41, 0x20, 0x41), RGB(0x41, 0x20, 0x39), RGB(0x41, 0x20, 0x31), RGB(0x41, 0x20, 0x28),
RGB(0x41, 0x20, 0x20), RGB(0x41, 0x28, 0x20), RGB(0x41, 0x31, 0x20), RGB(0x41, 0x39, 0x20),
RGB(0x41, 0x41, 0x20), RGB(0x39, 0x41, 0x20), RGB(0x31, 0x41, 0x20), RGB(0x28, 0x41, 0x20),
RGB(0x20, 0x41, 0x20), RGB(0x20, 0x41, 0x28), RGB(0x20, 0x41, 0x31), RGB(0x20, 0x41, 0x39),
RGB(0x20, 0x41, 0x41), RGB(0x20, 0x39, 0x41), RGB(0x20, 0x31, 0x41), RGB(0x20, 0x28, 0x41),
RGB(0x2D, 0x2D, 0x41), RGB(0x31, 0x2D, 0x41), RGB(0x35, 0x2D, 0x41), RGB(0x3D, 0x2D, 0x41),
RGB(0x41, 0x2D, 0x41), RGB(0x41, 0x2D, 0x3D), RGB(0x41, 0x2D, 0x35), RGB(0x41, 0x2D, 0x31),
RGB(0x41, 0x2D, 0x2D), RGB(0x41, 0x31, 0x2D), RGB(0x41, 0x35, 0x2D), RGB(0x41, 0x3D, 0x2D),
RGB(0x41, 0x41, 0x2D), RGB(0x3D, 0x41, 0x2D), RGB(0x35, 0x41, 0x2D), RGB(0x31, 0x41, 0x2D),
RGB(0x2D, 0x41, 0x2D), RGB(0x2D, 0x41, 0x31), RGB(0x2D, 0x41, 0x35), RGB(0x2D, 0x41, 0x3D),
RGB(0x2D, 0x41, 0x41), RGB(0x2D, 0x3D, 0x41), RGB(0x2D, 0x35, 0x41), RGB(0x2D, 0x31, 0x41),
RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0x00),
RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0x00)
};
#elif defined(USE_DOSBOX_COLORS)
// DOSBox colors
static CONST COLORREF VgaDefaultPalette[VGA_MAX_COLORS] =
{
RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0xAA), RGB(0x00, 0xAA, 0x00), RGB(0x00, 0xAA, 0xAA),
RGB(0xAA, 0x00, 0x00), RGB(0xAA, 0x00, 0xAA), RGB(0xAA, 0x55, 0x00), RGB(0xAA, 0xAA, 0xAA),
RGB(0x55, 0x55, 0x55), RGB(0x55, 0x55, 0xFF), RGB(0x55, 0xFF, 0x55), RGB(0x55, 0xFF, 0xFF),
RGB(0xFF, 0x55, 0x55), RGB(0xFF, 0x55, 0xFF), RGB(0xFF, 0xFF, 0x55), RGB(0xFF, 0xFF, 0xFF),
RGB(0x00, 0x00, 0x00), RGB(0x14, 0x14, 0x14), RGB(0x20, 0x20, 0x20), RGB(0x2C, 0x2C, 0x2C),
RGB(0x38, 0x38, 0x38), RGB(0x45, 0x45, 0x45), RGB(0x51, 0x51, 0x51), RGB(0x61, 0x61, 0x61),
RGB(0x71, 0x71, 0x71), RGB(0x82, 0x82, 0x82), RGB(0x92, 0x92, 0x92), RGB(0xA2, 0xA2, 0xA2),
RGB(0xB6, 0xB6, 0xB6), RGB(0xCB, 0xCB, 0xCB), RGB(0xE3, 0xE3, 0xE3), RGB(0xFF, 0xFF, 0xFF),
RGB(0x00, 0x00, 0xFF), RGB(0x41, 0x00, 0xFF), RGB(0x7D, 0x00, 0xFF), RGB(0xBE, 0x00, 0xFF),
RGB(0xFF, 0x00, 0xFF), RGB(0xFF, 0x00, 0xBE), RGB(0xFF, 0x00, 0x7D), RGB(0xFF, 0x00, 0x41),
RGB(0xFF, 0x00, 0x00), RGB(0xFF, 0x41, 0x00), RGB(0xFF, 0x7D, 0x00), RGB(0xFF, 0xBE, 0x00),
RGB(0xFF, 0xFF, 0x00), RGB(0xBE, 0xFF, 0x00), RGB(0x7D, 0xFF, 0x00), RGB(0x41, 0xFF, 0x00),
RGB(0x00, 0xFF, 0x00), RGB(0x00, 0xFF, 0x41), RGB(0x00, 0xFF, 0x7D), RGB(0x00, 0xFF, 0xBE),
RGB(0x00, 0xFF, 0xFF), RGB(0x00, 0xBE, 0xFF), RGB(0x00, 0x7D, 0xFF), RGB(0x00, 0x41, 0xFF),
RGB(0x7D, 0x7D, 0xFF), RGB(0x9E, 0x7D, 0xFF), RGB(0xBE, 0x7D, 0xFF), RGB(0xDF, 0x7D, 0xFF),
RGB(0xFF, 0x7D, 0xFF), RGB(0xFF, 0x7D, 0xDF), RGB(0xFF, 0x7D, 0xBE), RGB(0xFF, 0x7D, 0x9E),
RGB(0xFF, 0x7D, 0x7D), RGB(0xFF, 0x9E, 0x7D), RGB(0xFF, 0xBE, 0x7D), RGB(0xFF, 0xDF, 0x7D),
RGB(0xFF, 0xFF, 0x7D), RGB(0xDF, 0xFF, 0x7D), RGB(0xBE, 0xFF, 0x7D), RGB(0x9E, 0xFF, 0x7D),
RGB(0x7D, 0xFF, 0x7D), RGB(0x7D, 0xFF, 0x9E), RGB(0x7D, 0xFF, 0xBE), RGB(0x7D, 0xFF, 0xDF),
RGB(0x7D, 0xFF, 0xFF), RGB(0x7D, 0xDF, 0xFF), RGB(0x7D, 0xBE, 0xFF), RGB(0x7D, 0x9E, 0xFF),
RGB(0xB6, 0xB6, 0xFF), RGB(0xC7, 0xB6, 0xFF), RGB(0xDB, 0xB6, 0xFF), RGB(0xEB, 0xB6, 0xFF),
RGB(0xFF, 0xB6, 0xFF), RGB(0xFF, 0xB6, 0xEB), RGB(0xFF, 0xB6, 0xDB), RGB(0xFF, 0xB6, 0xC7),
RGB(0xFF, 0xB6, 0xB6), RGB(0xFF, 0xC7, 0xB6), RGB(0xFF, 0xDB, 0xB6), RGB(0xFF, 0xEB, 0xB6),
RGB(0xFF, 0xFF, 0xB6), RGB(0xEB, 0xFF, 0xB6), RGB(0xDB, 0xFF, 0xB6), RGB(0xC7, 0xFF, 0xB6),
RGB(0xB6, 0xFF, 0xB6), RGB(0xB6, 0xFF, 0xC7), RGB(0xB6, 0xFF, 0xDB), RGB(0xB6, 0xFF, 0xEB),
RGB(0xB6, 0xFF, 0xFF), RGB(0xB6, 0xEB, 0xFF), RGB(0xB6, 0xDB, 0xFF), RGB(0xB6, 0xC7, 0xFF),
RGB(0x00, 0x00, 0x71), RGB(0x1C, 0x00, 0x71), RGB(0x38, 0x00, 0x71), RGB(0x55, 0x00, 0x71),
RGB(0x71, 0x00, 0x71), RGB(0x71, 0x00, 0x55), RGB(0x71, 0x00, 0x38), RGB(0x71, 0x00, 0x1C),
RGB(0x71, 0x00, 0x00), RGB(0x71, 0x1C, 0x00), RGB(0x71, 0x38, 0x00), RGB(0x71, 0x55, 0x00),
RGB(0x71, 0x71, 0x00), RGB(0x55, 0x71, 0x00), RGB(0x38, 0x71, 0x00), RGB(0x1C, 0x71, 0x00),
RGB(0x00, 0x71, 0x00), RGB(0x00, 0x71, 0x1C), RGB(0x00, 0x71, 0x38), RGB(0x00, 0x71, 0x55),
RGB(0x00, 0x71, 0x71), RGB(0x00, 0x55, 0x71), RGB(0x00, 0x38, 0x71), RGB(0x00, 0x1C, 0x71),
RGB(0x38, 0x38, 0x71), RGB(0x45, 0x38, 0x71), RGB(0x55, 0x38, 0x71), RGB(0x61, 0x38, 0x71),
RGB(0x71, 0x38, 0x71), RGB(0x71, 0x38, 0x61), RGB(0x71, 0x38, 0x55), RGB(0x71, 0x38, 0x45),
RGB(0x71, 0x38, 0x38), RGB(0x71, 0x45, 0x38), RGB(0x71, 0x55, 0x38), RGB(0x71, 0x61, 0x38),
RGB(0x71, 0x71, 0x38), RGB(0x61, 0x71, 0x38), RGB(0x55, 0x71, 0x38), RGB(0x45, 0x71, 0x38),
RGB(0x38, 0x71, 0x38), RGB(0x38, 0x71, 0x45), RGB(0x38, 0x71, 0x55), RGB(0x38, 0x71, 0x61),
RGB(0x38, 0x71, 0x71), RGB(0x38, 0x61, 0x71), RGB(0x38, 0x55, 0x71), RGB(0x38, 0x45, 0x71),
RGB(0x51, 0x51, 0x71), RGB(0x59, 0x51, 0x71), RGB(0x61, 0x51, 0x71), RGB(0x69, 0x51, 0x71),
RGB(0x71, 0x51, 0x71), RGB(0x71, 0x51, 0x69), RGB(0x71, 0x51, 0x61), RGB(0x71, 0x51, 0x59),
RGB(0x71, 0x51, 0x51), RGB(0x71, 0x59, 0x51), RGB(0x71, 0x61, 0x51), RGB(0x71, 0x69, 0x51),
RGB(0x71, 0x71, 0x51), RGB(0x69, 0x71, 0x51), RGB(0x61, 0x71, 0x51), RGB(0x59, 0x71, 0x51),
RGB(0x51, 0x71, 0x51), RGB(0x51, 0x71, 0x59), RGB(0x51, 0x71, 0x61), RGB(0x51, 0x71, 0x69),
RGB(0x51, 0x71, 0x71), RGB(0x51, 0x69, 0x71), RGB(0x51, 0x61, 0x71), RGB(0x51, 0x59, 0x71),
RGB(0x00, 0x00, 0x41), RGB(0x10, 0x00, 0x41), RGB(0x20, 0x00, 0x41), RGB(0x30, 0x00, 0x41),
RGB(0x41, 0x00, 0x41), RGB(0x41, 0x00, 0x30), RGB(0x41, 0x00, 0x20), RGB(0x41, 0x00, 0x10),
RGB(0x41, 0x00, 0x00), RGB(0x41, 0x10, 0x00), RGB(0x41, 0x20, 0x00), RGB(0x41, 0x30, 0x00),
RGB(0x41, 0x41, 0x00), RGB(0x30, 0x41, 0x00), RGB(0x20, 0x41, 0x00), RGB(0x10, 0x41, 0x00),
RGB(0x00, 0x41, 0x00), RGB(0x00, 0x41, 0x10), RGB(0x00, 0x41, 0x20), RGB(0x00, 0x41, 0x30),
RGB(0x00, 0x41, 0x41), RGB(0x00, 0x30, 0x41), RGB(0x00, 0x20, 0x41), RGB(0x00, 0x10, 0x41),
RGB(0x20, 0x20, 0x41), RGB(0x28, 0x20, 0x41), RGB(0x30, 0x20, 0x41), RGB(0x38, 0x20, 0x41),
RGB(0x41, 0x20, 0x41), RGB(0x41, 0x20, 0x38), RGB(0x41, 0x20, 0x30), RGB(0x41, 0x20, 0x28),
RGB(0x41, 0x20, 0x20), RGB(0x41, 0x28, 0x20), RGB(0x41, 0x30, 0x20), RGB(0x41, 0x38, 0x20),
RGB(0x41, 0x41, 0x20), RGB(0x38, 0x41, 0x20), RGB(0x30, 0x41, 0x20), RGB(0x28, 0x41, 0x20),
RGB(0x20, 0x41, 0x20), RGB(0x20, 0x41, 0x28), RGB(0x20, 0x41, 0x30), RGB(0x20, 0x41, 0x38),
RGB(0x20, 0x41, 0x41), RGB(0x20, 0x38, 0x41), RGB(0x20, 0x30, 0x41), RGB(0x20, 0x28, 0x41),
RGB(0x2C, 0x2C, 0x41), RGB(0x30, 0x2C, 0x41), RGB(0x34, 0x2C, 0x41), RGB(0x3C, 0x2C, 0x41),
RGB(0x41, 0x2C, 0x41), RGB(0x41, 0x2C, 0x3C), RGB(0x41, 0x2C, 0x34), RGB(0x41, 0x2C, 0x30),
RGB(0x41, 0x2C, 0x2C), RGB(0x41, 0x30, 0x2C), RGB(0x41, 0x34, 0x2C), RGB(0x41, 0x3C, 0x2C),
RGB(0x41, 0x41, 0x2C), RGB(0x3C, 0x41, 0x2C), RGB(0x34, 0x41, 0x2C), RGB(0x30, 0x41, 0x2C),
RGB(0x2C, 0x41, 0x2C), RGB(0x2C, 0x41, 0x30), RGB(0x2C, 0x41, 0x34), RGB(0x2C, 0x41, 0x3C),
RGB(0x2C, 0x41, 0x41), RGB(0x2C, 0x3C, 0x41), RGB(0x2C, 0x34, 0x41), RGB(0x2C, 0x30, 0x41),
RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0x00),
RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0x00), RGB(0x00, 0x00, 0x00)
};
#endif
/*
* Default 16-color palette for foreground and background
* (corresponding flags in comments).
* Taken from subsystems/win32/winsrv/consrv/frontends/gui/conwnd.c
*/
static const COLORREF ConsoleColors[16] =
{
RGB(0, 0, 0), // (Black)
RGB(0, 0, 128), // BLUE
RGB(0, 128, 0), // GREEN
RGB(0, 128, 128), // BLUE | GREEN
RGB(128, 0, 0), // RED
RGB(128, 0, 128), // BLUE | RED
RGB(128, 128, 0), // GREEN | RED
RGB(192, 192, 192), // BLUE | GREEN | RED
RGB(128, 128, 128), // (Grey) INTENSITY
RGB(0, 0, 255), // BLUE | INTENSITY
RGB(0, 255, 0), // GREEN | INTENSITY
RGB(0, 255, 255), // BLUE | GREEN | INTENSITY
RGB(255, 0, 0), // RED | INTENSITY
RGB(255, 0, 255), // BLUE | RED | INTENSITY
RGB(255, 255, 0), // GREEN | RED | INTENSITY
RGB(255, 255, 255) // BLUE | GREEN | RED | INTENSITY
};
/// ConsoleFramebuffer
static PVOID ActiveFramebuffer = NULL; // Active framebuffer, points to
// either TextFramebuffer or a
// valid graphics framebuffer.
static HPALETTE TextPaletteHandle = NULL;
static HPALETTE PaletteHandle = NULL;
/*
* Text mode -- we always keep a valid text mode framebuffer
* even if we are in graphics mode. This is needed in order
* to keep a consistent VGA state. However, each time the VGA
* detaches from the console (and reattaches to it later on),
* this text mode framebuffer is recreated.
*/
static PCHAR_CELL TextFramebuffer = NULL;
/*
* Graphics mode
*/
static PBYTE GraphicsFramebuffer = NULL;
// static HANDLE ConsoleMutex = NULL;
// /* DoubleVision support */
// static BOOLEAN DoubleWidth = FALSE;
// static BOOLEAN DoubleHeight = FALSE;
/*
* VGA Hardware
*/
static BYTE VgaMemory[VGA_NUM_BANKS * SVGA_BANK_SIZE];
static BYTE VgaLatchRegisters[VGA_NUM_BANKS] = {0, 0, 0, 0};
static BYTE VgaMiscRegister;
static BYTE VgaFeatureRegister;
static BYTE VgaSeqIndex = VGA_SEQ_RESET_REG;
static BYTE VgaSeqRegisters[SVGA_SEQ_MAX_REG];
static BYTE VgaCrtcIndex = VGA_CRTC_HORZ_TOTAL_REG;
static BYTE VgaCrtcRegisters[SVGA_CRTC_MAX_REG];
static BYTE VgaGcIndex = VGA_GC_RESET_REG;
static BYTE VgaGcRegisters[SVGA_GC_MAX_REG];
static BOOLEAN VgaAcLatch = FALSE;
static BOOLEAN VgaAcPalDisable = TRUE;
static BYTE VgaAcIndex = VGA_AC_PAL_0_REG;
static BYTE VgaAcRegisters[VGA_AC_MAX_REG];
static BYTE VgaDacMask = 0xFF;
static BYTE VgaDacLatchCounter = 0;
static BYTE VgaDacLatch[3];
static BOOLEAN VgaDacReadWrite = FALSE;
static WORD VgaDacIndex = 0;
static BYTE VgaDacRegisters[VGA_PALETTE_SIZE];
// static VGA_REGISTERS VgaRegisters;
static ULONGLONG HorizontalRetraceCycle = 0ULL;
static PHARDWARE_TIMER HSyncTimer;
static DWORD ScanlineCounter = 0;
static DWORD StartAddressLatch = 0;
static DWORD ScanlineSizeLatch = 0;
static BOOLEAN NeedsUpdate = FALSE;
static BOOLEAN ModeChanged = FALSE;
static BOOLEAN CursorChanged = FALSE;
static BOOLEAN PaletteChanged = FALSE;
static UINT SvgaHdrCounter = 0;
static BYTE SvgaHiddenRegister = 0;
typedef enum _SCREEN_MODE
{
TEXT_MODE,
GRAPHICS_MODE
} SCREEN_MODE, *PSCREEN_MODE;
static SCREEN_MODE ScreenMode = TEXT_MODE;
static COORD CurrResolution = {0};
static SMALL_RECT UpdateRectangle = { 0, 0, 0, 0 };
/** HACK!! **/
#include "../../console/video.c"
/** HACK!! **/
/* PRIVATE FUNCTIONS **********************************************************/
static inline DWORD VgaGetVideoBaseAddress(VOID)
{
return MemoryBase[(VgaGcRegisters[VGA_GC_MISC_REG] >> 2) & 0x03];
}
static inline DWORD VgaGetAddressSize(VOID)
{
if (VgaSeqRegisters[SVGA_SEQ_EXT_MODE_REG] & SVGA_SEQ_EXT_MODE_HIGH_RES)
{
/* Packed pixel addressing */
return 1;
}
else if (VgaCrtcRegisters[VGA_CRTC_UNDERLINE_REG] & VGA_CRTC_UNDERLINE_DWORD)
{
/* Double-word addressing */
return 4; // sizeof(DWORD)
}
else if (VgaCrtcRegisters[VGA_CRTC_MODE_CONTROL_REG] & VGA_CRTC_MODE_CONTROL_BYTE)
{
/* Byte addressing */
return 1; // sizeof(BYTE)
}
else
{
/* Word addressing */
return 2; // sizeof(WORD)
}
}
static inline DWORD VgaTranslateAddress(DWORD Address)
{
DWORD Offset = LOWORD(Address - VgaGetVideoBaseAddress());
DWORD ExtOffset = ((VgaGcRegisters[SVGA_GC_EXT_MODE_REG] & SVGA_GC_EXT_MODE_WND_B) && (Offset & (1 << 15)))
? VgaGcRegisters[SVGA_GC_OFFSET_1_REG]
: VgaGcRegisters[SVGA_GC_OFFSET_0_REG];
/* Check for chain-4 and odd-even mode */
if (VgaSeqRegisters[VGA_SEQ_MEM_REG] & VGA_SEQ_MEM_C4)
{
/* Clear the lowest two bits since they're used to select the bank */
Offset &= ~3;
}
else if (VgaGcRegisters[VGA_GC_MODE_REG] & VGA_GC_MODE_OE)
{
/* Clear the lowest bit since it's used to select odd/even */
Offset &= ~1;
}
if (ExtOffset)
{
/* Add the extended offset */
Offset += ExtOffset << ((VgaGcRegisters[SVGA_GC_EXT_MODE_REG] & SVGA_GC_EXT_MODE_GRAN) ? 14 : 12);
}
/* Return the offset on plane 0 */
return Offset;
}
static inline BYTE VgaTranslateByteForWriting(BYTE Data, BYTE Plane)
{
BYTE WriteMode = VgaGcRegisters[VGA_GC_MODE_REG] & 0x03;
BYTE BitMask = VgaGcRegisters[VGA_GC_BITMASK_REG];
if (WriteMode == 1)
{
/* In write mode 1 just return the latch register */
return VgaLatchRegisters[Plane];
}
if (WriteMode != 2)
{
/* Write modes 0 and 3 rotate the data to the right first */
BYTE RotateCount = VgaGcRegisters[VGA_GC_ROTATE_REG] & 0x07;
Data = LOBYTE(((DWORD)Data >> RotateCount) | ((DWORD)Data << (8 - RotateCount)));
}
else
{
/* Write mode 2 expands the appropriate bit to all 8 bits */
Data = (Data & (1 << Plane)) ? 0xFF : 0x00;
}
if (WriteMode == 0)
{
/*
* In write mode 0, the enable set/reset register decides if the
* set/reset bit should be expanded to all 8 bits.
*/
if (VgaGcRegisters[VGA_GC_ENABLE_RESET_REG] & (1 << Plane))
{
/* Copy the bit from the set/reset register to all 8 bits */
Data = (VgaGcRegisters[VGA_GC_RESET_REG] & (1 << Plane)) ? 0xFF : 0x00;
}
}
if (WriteMode != 3)
{
/* Write modes 0 and 2 then perform a logical operation on the data and latch */
BYTE LogicalOperation = (VgaGcRegisters[VGA_GC_ROTATE_REG] >> 3) & 0x03;
if (LogicalOperation == 1) Data &= VgaLatchRegisters[Plane];
else if (LogicalOperation == 2) Data |= VgaLatchRegisters[Plane];
else if (LogicalOperation == 3) Data ^= VgaLatchRegisters[Plane];
}
else
{
/* For write mode 3, we AND the bitmask with the data, which is used as the new bitmask */
BitMask &= Data;
/* Then we expand the bit in the set/reset field */
Data = (VgaGcRegisters[VGA_GC_RESET_REG] & (1 << Plane)) ? 0xFF : 0x00;
}
/* Bits cleared in the bitmask are replaced with latch register bits */
Data = (Data & BitMask) | (VgaLatchRegisters[Plane] & (~BitMask));
/* Return the byte */
return Data;
}
static inline ULONG VgaGetClockFrequency(VOID)
{
BYTE Numerator, Denominator;
if (VgaSeqRegisters[SVGA_SEQ_MCLK_REG] & SVGA_SEQ_MCLK_VCLK)
{
/* The VCLK is being generated using the MCLK */
ULONG Clock = (VGA_CLOCK_BASE * (VgaSeqRegisters[SVGA_SEQ_MCLK_REG] & 0x3F)) >> 3;
if (VgaSeqRegisters[SVGA_SEQ_VCLK3_DENOMINATOR_REG] & 1)
{
/* Use only half of the MCLK as the VCLK */
Clock >>= 1;
}
return Clock;
}
switch ((VgaMiscRegister >> 2) & 3)
{
case 0:
{
Numerator = VgaSeqRegisters[SVGA_SEQ_VCLK0_NUMERATOR_REG];
Denominator = VgaSeqRegisters[SVGA_SEQ_VCLK0_DENOMINATOR_REG];
break;
}
case 1:
{
Numerator = VgaSeqRegisters[SVGA_SEQ_VCLK1_NUMERATOR_REG];
Denominator = VgaSeqRegisters[SVGA_SEQ_VCLK1_DENOMINATOR_REG];
break;
}
case 2:
{
Numerator = VgaSeqRegisters[SVGA_SEQ_VCLK2_NUMERATOR_REG];
Denominator = VgaSeqRegisters[SVGA_SEQ_VCLK2_DENOMINATOR_REG];
break;
}
case 3:
{
Numerator = VgaSeqRegisters[SVGA_SEQ_VCLK3_NUMERATOR_REG];
Denominator = VgaSeqRegisters[SVGA_SEQ_VCLK3_DENOMINATOR_REG];
break;
}
}
/* The numerator is 7-bit */
Numerator &= ~(1 << 7);
/* If bit 7 is clear, the denominator is 5-bit */
if (!(Denominator & (1 << 7))) Denominator &= ~(1 << 6);
/* Bit 0 of the denominator is the post-scalar bit */
if (Denominator & 1) Denominator &= ~1;
else Denominator >>= 1;
/* Return the clock frequency in Hz */
return (VGA_CLOCK_BASE * Numerator) / Denominator;
}
static VOID VgaResetSequencer(VOID)
{
/* Lock extended SVGA registers */
VgaSeqRegisters[SVGA_SEQ_UNLOCK_REG] = SVGA_SEQ_LOCKED;
/* Initialize the VCLKs */
VgaSeqRegisters[SVGA_SEQ_VCLK0_NUMERATOR_REG] = 0x66;
VgaSeqRegisters[SVGA_SEQ_VCLK0_DENOMINATOR_REG] = 0x3B;
VgaSeqRegisters[SVGA_SEQ_VCLK1_NUMERATOR_REG] = 0x5B;
VgaSeqRegisters[SVGA_SEQ_VCLK1_DENOMINATOR_REG] = 0x2F;
VgaSeqRegisters[SVGA_SEQ_VCLK2_NUMERATOR_REG] = 0x45;
VgaSeqRegisters[SVGA_SEQ_VCLK2_DENOMINATOR_REG] = 0x30;
VgaSeqRegisters[SVGA_SEQ_VCLK3_NUMERATOR_REG] = 0x7E;
VgaSeqRegisters[SVGA_SEQ_VCLK3_DENOMINATOR_REG] = 0x33;
/* 50 MHz MCLK, not being used as the VCLK */
VgaSeqRegisters[SVGA_SEQ_MCLK_REG] = 0x1C;
}
static VOID VgaRestoreDefaultPalette(PPALETTEENTRY Entries, USHORT NumOfEntries)
{
USHORT i;
/* Copy the colors of the default palette to the DAC and console palette */
for (i = 0; i < NumOfEntries; i++)
{
/* Set the palette entries */
Entries[i].peRed = GetRValue(VgaDefaultPalette[i]);
Entries[i].peGreen = GetGValue(VgaDefaultPalette[i]);
Entries[i].peBlue = GetBValue(VgaDefaultPalette[i]);
Entries[i].peFlags = 0;
/* Set the DAC registers */
VgaDacRegisters[i * 3] = VGA_COLOR_TO_DAC(GetRValue(VgaDefaultPalette[i]));
VgaDacRegisters[i * 3 + 1] = VGA_COLOR_TO_DAC(GetGValue(VgaDefaultPalette[i]));
VgaDacRegisters[i * 3 + 2] = VGA_COLOR_TO_DAC(GetBValue(VgaDefaultPalette[i]));
}
}
static BOOLEAN VgaInitializePalette(VOID)
{
UINT i;
BOOLEAN Result = FALSE;
LPLOGPALETTE Palette, TextPalette;
/* Allocate storage space for the palettes */
Palette = RtlAllocateHeap(RtlGetProcessHeap(),
HEAP_ZERO_MEMORY,
sizeof(LOGPALETTE) +
VGA_MAX_COLORS * sizeof(PALETTEENTRY));
TextPalette = RtlAllocateHeap(RtlGetProcessHeap(),
HEAP_ZERO_MEMORY,
sizeof(LOGPALETTE) +
(VGA_AC_PAL_F_REG + 1) * sizeof(PALETTEENTRY));
if ((Palette == NULL) || (TextPalette == NULL)) goto Cleanup;
/* Initialize the palettes */
Palette->palVersion = TextPalette->palVersion = 0x0300;
Palette->palNumEntries = VGA_MAX_COLORS;
TextPalette->palNumEntries = VGA_AC_PAL_F_REG + 1;
/* Restore the default graphics palette */
VgaRestoreDefaultPalette(Palette->palPalEntry, Palette->palNumEntries);
/* Set the default text palette */
for (i = 0; i < TextPalette->palNumEntries; i++)
{
/* Set the palette entries */
TextPalette->palPalEntry[i].peRed = GetRValue(ConsoleColors[i]);
TextPalette->palPalEntry[i].peGreen = GetGValue(ConsoleColors[i]);
TextPalette->palPalEntry[i].peBlue = GetBValue(ConsoleColors[i]);
TextPalette->palPalEntry[i].peFlags = 0;
}
/* Create the palettes */
PaletteHandle = CreatePalette(Palette);
TextPaletteHandle = CreatePalette(TextPalette);
if (PaletteHandle != NULL && TextPaletteHandle != NULL)
{
/* The palettes have been created successfully */
Result = TRUE;
}
Cleanup:
/* Free the palettes */
if (Palette) RtlFreeHeap(RtlGetProcessHeap(), 0, Palette);
if (TextPalette) RtlFreeHeap(RtlGetProcessHeap(), 0, TextPalette);
if (!Result)
{
/* Something failed, delete the palettes */
if (PaletteHandle) DeleteObject(PaletteHandle);
if (TextPaletteHandle) DeleteObject(TextPaletteHandle);
}
return Result;
}
static VOID VgaResetPalette(VOID)
{
PALETTEENTRY Entries[VGA_MAX_COLORS];
/* Restore the default palette */
VgaRestoreDefaultPalette(Entries, VGA_MAX_COLORS);
SetPaletteEntries(PaletteHandle, 0, VGA_MAX_COLORS, Entries);
PaletteChanged = TRUE;
}
static BOOL VgaEnterNewMode(SCREEN_MODE NewScreenMode, PCOORD Resolution)
{
/* Check if the new mode is alphanumeric */
if (NewScreenMode == TEXT_MODE)
{
/* Enter new text mode */
if (!VgaConsoleCreateTextScreen(// &TextFramebuffer,
Resolution,
TextPaletteHandle))
{
DisplayMessage(L"An unexpected VGA error occurred while switching into text mode. Error: %u", GetLastError());
EmulatorTerminate();
return FALSE;
}
/* The active framebuffer is now the text framebuffer */
ActiveFramebuffer = TextFramebuffer;
/* Set the screen mode flag */
ScreenMode = TEXT_MODE;
return TRUE;
}
else
{
/* Enter graphics mode */
if (!VgaConsoleCreateGraphicsScreen(// &GraphicsFramebuffer,
Resolution,
PaletteHandle))
{
DisplayMessage(L"An unexpected VGA error occurred while switching into graphics mode. Error: %u", GetLastError());
EmulatorTerminate();
return FALSE;
}
/* The active framebuffer is now the graphics framebuffer */
ActiveFramebuffer = GraphicsFramebuffer;
/* Set the screen mode flag */
ScreenMode = GRAPHICS_MODE;
return TRUE;
}
}
static VOID VgaLeaveCurrentMode(VOID)
{
/* Leave the current video mode */
if (ScreenMode == GRAPHICS_MODE)
{
VgaConsoleDestroyGraphicsScreen();
/* Cleanup the video data */
GraphicsFramebuffer = NULL;
}
else
{
VgaConsoleDestroyTextScreen();
/* Cleanup the video data */
// TextFramebuffer = NULL;
// NEVER SET the ALWAYS-SET TextFramebuffer pointer to NULL!!
}
/* Reset the active framebuffer */
ActiveFramebuffer = NULL;
}
static VOID VgaChangeMode(VOID)
{
COORD NewResolution = VgaGetDisplayResolution();
SCREEN_MODE NewScreenMode =
!(VgaGcRegisters[VGA_GC_MISC_REG] & VGA_GC_MISC_NOALPHA) ? TEXT_MODE
: GRAPHICS_MODE;
/*
* Do not switch to a different screen mode + resolution if the new settings
* are the same as the old ones. Just repaint the full screen.
*/
if ((ScreenMode == NewScreenMode) && // CurrResolution == NewResolution
(CurrResolution.X == NewResolution.X && CurrResolution.Y == NewResolution.Y))
{
goto Quit;
}
// FIXME: Wouldn't it be preferrable to switch to the new console SB
// *ONLY* if we succeeded in setting the new mode??
/* Leave the current video mode */
VgaLeaveCurrentMode(); // ScreenMode
/* Update the current resolution */
CurrResolution = NewResolution;
/* Change the screen mode */
if (!VgaEnterNewMode(NewScreenMode, &CurrResolution))
return;
Quit:
/* Trigger a full update of the screen */
NeedsUpdate = TRUE;
UpdateRectangle.Left = 0;
UpdateRectangle.Top = 0;
UpdateRectangle.Right = CurrResolution.X;
UpdateRectangle.Bottom = CurrResolution.Y;
/* Reset the mode change flag */
ModeChanged = FALSE;
}
static inline VOID VgaMarkForUpdate(SHORT Row, SHORT Column)
{
/* Check if this is the first time the rectangle is updated */
if (!NeedsUpdate)
{
UpdateRectangle.Left = UpdateRectangle.Top = MAXSHORT;
UpdateRectangle.Right = UpdateRectangle.Bottom = MINSHORT;
}
/* Expand the rectangle to include the point */
UpdateRectangle.Left = min(UpdateRectangle.Left, Column);
UpdateRectangle.Right = max(UpdateRectangle.Right, Column);
UpdateRectangle.Top = min(UpdateRectangle.Top, Row);
UpdateRectangle.Bottom = max(UpdateRectangle.Bottom, Row);
/* Set the update request flag */
NeedsUpdate = TRUE;
}
static VOID VgaUpdateFramebuffer(VOID)
{
SHORT i, j, k;
DWORD AddressSize = VgaGetAddressSize();
DWORD Address = StartAddressLatch;
BYTE BytePanning = (VgaCrtcRegisters[VGA_CRTC_PRESET_ROW_SCAN_REG] >> 5) & 3;
WORD LineCompare = VgaCrtcRegisters[VGA_CRTC_LINE_COMPARE_REG]
| ((VgaCrtcRegisters[VGA_CRTC_OVERFLOW_REG] & VGA_CRTC_OVERFLOW_LC8) << 4)
| ((VgaCrtcRegisters[VGA_CRTC_MAX_SCAN_LINE_REG] & VGA_CRTC_MAXSCANLINE_LC9) << 3);
BYTE PixelShift = VgaAcRegisters[VGA_AC_HORZ_PANNING_REG] & 0x0F;
/*
* If the console framebuffer is NULL, that means something
* went wrong earlier and this is the final display refresh.
*/
if (ActiveFramebuffer == NULL) return;
/* Check if we are in text or graphics mode */
if (ScreenMode == GRAPHICS_MODE)
{
/* Graphics mode */
PBYTE GraphicsBuffer = (PBYTE)ActiveFramebuffer;
DWORD InterlaceHighBit = VGA_INTERLACE_HIGH_BIT;
SHORT X;
/*
* Synchronize access to the graphics framebuffer
* with the console framebuffer mutex.
*/
WaitForSingleObject(ConsoleMutex, INFINITE);
/* Shift the high bit right by 1 in odd/even mode */
if (VgaGcRegisters[VGA_GC_MODE_REG] & VGA_GC_MODE_OE)
{
InterlaceHighBit >>= 1;
}
if (VgaCrtcRegisters[VGA_CRTC_MAX_SCAN_LINE_REG] & VGA_CRTC_MAXSCANLINE_DOUBLE)
{
/* Halve the line compare value */
LineCompare >>= 1;
}
else
{
/* Divide the line compare value by the maximum scan line */
LineCompare /= 1 + (VgaCrtcRegisters[VGA_CRTC_MAX_SCAN_LINE_REG] & 0x1F);
}
/* Loop through the scanlines */
for (i = 0; i < CurrResolution.Y; i++)
{
if (i == LineCompare)
{
if (VgaAcRegisters[VGA_AC_CONTROL_REG] & VGA_AC_CONTROL_PPM)
{
/*
* Disable the pixel shift count and byte panning
* for the rest of the display cycle
*/
PixelShift = 0;
BytePanning = 0;
}
/* Reset the address, but assume the preset row scan is 0 */
Address = BytePanning;
}
if ((VgaGcRegisters[VGA_GC_MISC_REG] & VGA_GC_MISC_OE) && (i & 1))
{
/* Odd-numbered line in interlaced mode - set the high bit */
Address |= InterlaceHighBit;
}
/* Loop through the pixels */
for (j = 0; j < CurrResolution.X; j++)
{
BYTE PixelData = 0;
/* Apply horizontal pixel panning */
if (VgaAcRegisters[VGA_AC_CONTROL_REG] & VGA_AC_CONTROL_8BIT)
{
X = j + ((PixelShift >> 1) & 0x03);
}
else
{
X = j + ((PixelShift < 8) ? PixelShift : -1);
}
if (VgaSeqRegisters[SVGA_SEQ_EXT_MODE_REG] & SVGA_SEQ_EXT_MODE_HIGH_RES)
{
// TODO: Check for high color modes
/* 256 color mode */
PixelData = VgaMemory[Address + X];
}
else
{
/* Check the shifting mode */
if (VgaGcRegisters[VGA_GC_MODE_REG] & VGA_GC_MODE_SHIFT256)
{
/* 4 bits shifted from each plane */
/* Check if this is 16 or 256 color mode */
if (VgaAcRegisters[VGA_AC_CONTROL_REG] & VGA_AC_CONTROL_8BIT)
{
/* One byte per pixel */
PixelData = VgaMemory[WRAP_OFFSET((Address + (X / VGA_NUM_BANKS)) * AddressSize)
* VGA_NUM_BANKS + (X % VGA_NUM_BANKS)];
}
else
{
/* 4-bits per pixel */
PixelData = VgaMemory[WRAP_OFFSET((Address + (X / (VGA_NUM_BANKS * 2))) * AddressSize)
* VGA_NUM_BANKS + ((X / 2) % VGA_NUM_BANKS)];
/* Check if we should use the highest 4 bits or lowest 4 */
if ((X % 2) == 0)
{
/* Highest 4 */
PixelData >>= 4;
}
else
{
/* Lowest 4 */
PixelData &= 0x0F;
}
}
}
else if (VgaGcRegisters[VGA_GC_MODE_REG] & VGA_GC_MODE_SHIFTREG)
{
/* Check if this is 16 or 256 color mode */
if (VgaAcRegisters[VGA_AC_CONTROL_REG] & VGA_AC_CONTROL_8BIT)
{
// TODO: NOT IMPLEMENTED
DPRINT1("8-bit interleaved mode is not implemented!\n");
}
else
{
/*
* 2 bits shifted from plane 0 and 2 for the first 4 pixels,
* then 2 bits shifted from plane 1 and 3 for the next 4
*/
DWORD BankNumber = (X / 4) % 2;
DWORD Offset = Address + (X / 8);
BYTE LowPlaneData = VgaMemory[WRAP_OFFSET(Offset * AddressSize) * VGA_NUM_BANKS + BankNumber];
BYTE HighPlaneData = VgaMemory[WRAP_OFFSET(Offset * AddressSize) * VGA_NUM_BANKS + (BankNumber + 2)];
/* Extract the two bits from each plane */
LowPlaneData = (LowPlaneData >> (6 - ((X % 4) * 2))) & 0x03;
HighPlaneData = (HighPlaneData >> (6 - ((X % 4) * 2))) & 0x03;
/* Combine them into the pixel */
PixelData = LowPlaneData | (HighPlaneData << 2);
}
}
else
{
/* 1 bit shifted from each plane */
/* Check if this is 16 or 256 color mode */
if (VgaAcRegisters[VGA_AC_CONTROL_REG] & VGA_AC_CONTROL_8BIT)
{
/* 8 bits per pixel, 2 on each plane */
for (k = 0; k < VGA_NUM_BANKS; k++)
{
/* The data is on plane k, 4 pixels per byte */
BYTE PlaneData = VgaMemory[WRAP_OFFSET((Address + (X >> 2)) * AddressSize) * VGA_NUM_BANKS + k];
/* The mask of the first bit in the pair */
BYTE BitMask = 1 << (((3 - (X % VGA_NUM_BANKS)) * 2) + 1);
/* Bits 0, 1, 2 and 3 come from the first bit of the pair */
if (PlaneData & BitMask) PixelData |= 1 << k;
/* Bits 4, 5, 6 and 7 come from the second bit of the pair */
if (PlaneData & (BitMask >> 1)) PixelData |= 1 << (k + 4);
}
}
else
{
/* 4 bits per pixel, 1 on each plane */
for (k = 0; k < VGA_NUM_BANKS; k++)
{
BYTE PlaneData = VgaMemory[WRAP_OFFSET((Address + (X >> 3)) * AddressSize) * VGA_NUM_BANKS + k];
/* If the bit on that plane is set, set it */
if (PlaneData & (1 << (7 - (X % 8)))) PixelData |= 1 << k;
}
}
}
}
if (!(VgaAcRegisters[VGA_AC_CONTROL_REG] & VGA_AC_CONTROL_8BIT))
{
/*
* In 16 color mode, the value is an index to the AC registers
* if external palette access is disabled, otherwise (in case
* of palette loading) it is a blank pixel.
*/
if (VgaAcPalDisable)
{
if (!(VgaAcRegisters[VGA_AC_CONTROL_REG] & VGA_AC_CONTROL_P54S))
{
/* Bits 4 and 5 are taken from the palette register */
PixelData = ((VgaAcRegisters[VGA_AC_COLOR_SEL_REG] << 4) & 0xC0)
| (VgaAcRegisters[PixelData & 0x0F] & 0x3F);
}
else
{
/* Bits 4 and 5 are taken from the color select register */
PixelData = (VgaAcRegisters[VGA_AC_COLOR_SEL_REG] << 4)
| (VgaAcRegisters[PixelData & 0x0F] & 0x0F);
}
}
else
{
PixelData = 0;
}
}
/* Take into account DoubleVision mode when checking for pixel updates */
if (DoubleWidth && DoubleHeight)
{
/* Now check if the resulting pixel data has changed */
if (GraphicsBuffer[(i * 2 * CurrResolution.X * 2) + (j * 2)] != PixelData)
{
/* Yes, write the new value */
GraphicsBuffer[(i * 2 * CurrResolution.X * 2) + (j * 2)] = PixelData;
GraphicsBuffer[(i * 2 * CurrResolution.X * 2) + (j * 2 + 1)] = PixelData;
GraphicsBuffer[((i * 2 + 1) * CurrResolution.X * 2) + (j * 2)] = PixelData;
GraphicsBuffer[((i * 2 + 1) * CurrResolution.X * 2) + (j * 2 + 1)] = PixelData;
/* Mark the specified pixel as changed */
VgaMarkForUpdate(i, j);
}
}
else if (DoubleWidth && !DoubleHeight)
{
/* Now check if the resulting pixel data has changed */
if (GraphicsBuffer[(i * CurrResolution.X * 2) + (j * 2)] != PixelData)
{
/* Yes, write the new value */
GraphicsBuffer[(i * CurrResolution.X * 2) + (j * 2)] = PixelData;
GraphicsBuffer[(i * CurrResolution.X * 2) + (j * 2 + 1)] = PixelData;
/* Mark the specified pixel as changed */
VgaMarkForUpdate(i, j);
}
}
else if (!DoubleWidth && DoubleHeight)
{
/* Now check if the resulting pixel data has changed */
if (GraphicsBuffer[(i * 2 * CurrResolution.X) + j] != PixelData)
{
/* Yes, write the new value */
GraphicsBuffer[(i * 2 * CurrResolution.X) + j] = PixelData;
GraphicsBuffer[((i * 2 + 1) * CurrResolution.X) + j] = PixelData;
/* Mark the specified pixel as changed */
VgaMarkForUpdate(i, j);
}
}
else // if (!DoubleWidth && !DoubleHeight)
{
/* Now check if the resulting pixel data has changed */
if (GraphicsBuffer[i * CurrResolution.X + j] != PixelData)
{
/* Yes, write the new value */
GraphicsBuffer[i * CurrResolution.X + j] = PixelData;
/* Mark the specified pixel as changed */
VgaMarkForUpdate(i, j);
}
}
}
if ((VgaGcRegisters[VGA_GC_MISC_REG] & VGA_GC_MISC_OE) && (i & 1))
{
/* Clear the high bit */
Address &= ~InterlaceHighBit;
}
if (!(VgaGcRegisters[VGA_GC_MISC_REG] & VGA_GC_MISC_OE) || (i & 1))
{
/* Move to the next scanline */
Address += ScanlineSizeLatch;
}
}
/*
* Release the console framebuffer mutex
* so that we allow for repainting.
*/
ReleaseMutex(ConsoleMutex);
}
else
{
/* Text mode */
DWORD CurrentAddr;
PCHAR_CELL CharBuffer = (PCHAR_CELL)ActiveFramebuffer;
CHAR_CELL CharInfo;
/*
* Technically, the horizontal panning and preset row count should
* affect text mode too. However, it works on pixels and not characters,
* so we can't support it currently.
*/
/* Loop through the scanlines */
for (i = 0; i < CurrResolution.Y; i++)
{
/* Loop through the characters */
for (j = 0; j < CurrResolution.X; j++)
{
CurrentAddr = WRAP_OFFSET((Address + j) * AddressSize);
/* Plane 0 holds the character itself */
CharInfo.Char = VgaMemory[CurrentAddr * VGA_NUM_BANKS];
/* Plane 1 holds the attribute */
CharInfo.Attributes = VgaMemory[CurrentAddr * VGA_NUM_BANKS + 1];
/* Now check if the resulting character data has changed */
if ((CharBuffer[i * CurrResolution.X + j].Char != CharInfo.Char) ||
(CharBuffer[i * CurrResolution.X + j].Attributes != CharInfo.Attributes))
{
/* Yes, write the new value */
CharBuffer[i * CurrResolution.X + j] = CharInfo;
/* Mark the specified cell as changed */
VgaMarkForUpdate(i, j);
}
}
/* Move to the next scanline */
Address += ScanlineSizeLatch;
}
}
}
static VOID VgaUpdateTextCursor(VOID)
{
BOOL CursorVisible = !(VgaCrtcRegisters[VGA_CRTC_CURSOR_START_REG] & 0x20);
BYTE CursorStart = VgaCrtcRegisters[VGA_CRTC_CURSOR_START_REG] & 0x1F;
BYTE CursorEnd = VgaCrtcRegisters[VGA_CRTC_CURSOR_END_REG] & 0x1F;
DWORD ScanlineSize = (DWORD)VgaCrtcRegisters[VGA_CRTC_OFFSET_REG] * 2;
BYTE TextSize = 1 + (VgaCrtcRegisters[VGA_CRTC_MAX_SCAN_LINE_REG] & 0x1F);
WORD Location = MAKEWORD(VgaCrtcRegisters[VGA_CRTC_CURSOR_LOC_LOW_REG],
VgaCrtcRegisters[VGA_CRTC_CURSOR_LOC_HIGH_REG]);
/* Just return if we are not in text mode */
if (ScreenMode != TEXT_MODE) return;
/* Add the cursor skew to the location */
Location += (VgaCrtcRegisters[VGA_CRTC_CURSOR_END_REG] >> 5) & 0x03;
VgaConsoleUpdateTextCursor(CursorVisible, CursorStart, CursorEnd,
TextSize, ScanlineSize, Location);
/* Reset the cursor changed flag */
CursorChanged = FALSE;
}
static BYTE WINAPI VgaReadPort(USHORT Port)
{
DPRINT("VgaReadPort: Port 0x%X\n", Port);
if (Port != VGA_DAC_MASK) SvgaHdrCounter = 0;
switch (Port)
{
case VGA_MISC_READ:
return VgaMiscRegister;
case VGA_INSTAT0_READ:
return 0; // Not implemented
case VGA_INSTAT1_READ_MONO:
case VGA_INSTAT1_READ_COLOR:
{
BYTE Result = 0;
BOOLEAN Vsync, Hsync;
ULONGLONG Cycles = CurrentCycleCount;
ULONG CyclesPerMicrosecond = (ULONG)((CurrentIps + 500000ULL) / 1000000ULL);
ULONG Dots = (VgaSeqRegisters[VGA_SEQ_CLOCK_REG] & 1) ? 9 : 8;
ULONG Clock = VgaGetClockFrequency() / 1000000;
ULONG HblankStart, HblankEnd;
ULONG HblankDuration;
ULONG VerticalRetraceStart = VgaCrtcRegisters[VGA_CRTC_START_VERT_RETRACE_REG];
ULONG VerticalRetraceEnd;
VerticalRetraceStart |= (VgaCrtcRegisters[VGA_CRTC_OVERFLOW_REG] & VGA_CRTC_OVERFLOW_VRS8) << 6;
VerticalRetraceStart |= (VgaCrtcRegisters[VGA_CRTC_OVERFLOW_REG] & VGA_CRTC_OVERFLOW_VRS9) << 2;
VerticalRetraceEnd = VerticalRetraceStart + (VgaCrtcRegisters[VGA_CRTC_END_VERT_RETRACE_REG] & 0x0F);
if (VgaGcRegisters[VGA_GC_MISC_REG] & VGA_GC_MISC_NOALPHA)
{
BYTE MaximumScanLine = 1 + (VgaCrtcRegisters[VGA_CRTC_MAX_SCAN_LINE_REG] & 0x1F);
if (VgaCrtcRegisters[VGA_CRTC_MAX_SCAN_LINE_REG] & VGA_CRTC_MAXSCANLINE_DOUBLE)
{
VerticalRetraceStart <<= 1;
VerticalRetraceEnd <<= 1;
}
else
{
VerticalRetraceStart *= MaximumScanLine;
VerticalRetraceEnd *= MaximumScanLine;
}
}
/* Calculate the horizontal blanking duration in cycles */
HblankStart = VgaCrtcRegisters[VGA_CRTC_START_HORZ_BLANKING_REG] & 0x1F;
HblankEnd = VgaCrtcRegisters[VGA_CRTC_END_HORZ_BLANKING_REG] & 0x1F;
if (HblankEnd < HblankStart) HblankEnd |= 0x20;
HblankDuration = ((HblankEnd - HblankStart) * Dots
* CyclesPerMicrosecond + (Clock >> 1)) / Clock;
Vsync = ScanlineCounter >= VerticalRetraceStart && ScanlineCounter <= VerticalRetraceEnd;
Hsync = (Cycles - HorizontalRetraceCycle) < (ULONGLONG)HblankDuration;
/* Reset the AC latch */
VgaAcLatch = FALSE;
/* Set a flag if there is a vertical or horizontal retrace */
if (Vsync || Hsync) Result |= VGA_STAT_DD;
/* Set an additional flag if there was a vertical retrace */
if (Vsync) Result |= VGA_STAT_VRETRACE;
return Result;
}
case VGA_FEATURE_READ:
return VgaFeatureRegister;
case VGA_AC_INDEX:
return VgaAcIndex | (VgaAcPalDisable ? 0x20 : 0x00);
case VGA_AC_READ:
return VgaAcRegisters[VgaAcIndex];
case VGA_SEQ_INDEX:
return VgaSeqIndex;
case VGA_SEQ_DATA:
return VgaSeqRegisters[VgaSeqIndex];
case VGA_DAC_MASK:
{
if (SvgaHdrCounter == 4)
{
SvgaHdrCounter = 0;
return SvgaHiddenRegister;
}
else
{
SvgaHdrCounter++;
return VgaDacMask;
}
}
case VGA_DAC_READ_INDEX:
/* This returns the read/write state */
return (VgaDacReadWrite ? 0 : 3);
case VGA_DAC_WRITE_INDEX:
return VgaDacIndex;
case VGA_DAC_DATA:
{
/* Ignore reads in write mode */
if (!VgaDacReadWrite)
{
BYTE Data = VgaDacRegisters[VgaDacIndex * 3 + VgaDacLatchCounter];
VgaDacLatchCounter++;
if (VgaDacLatchCounter == 3)
{
/* Reset the latch counter and increment the palette index */
VgaDacLatchCounter = 0;
VgaDacIndex++;
VgaDacIndex %= VGA_MAX_COLORS;
}
return Data;
}
break;
}
case VGA_CRTC_INDEX_MONO:
case VGA_CRTC_INDEX_COLOR:
return VgaCrtcIndex;
case VGA_CRTC_DATA_MONO:
case VGA_CRTC_DATA_COLOR:
return VgaCrtcRegisters[VgaCrtcIndex];
case VGA_GC_INDEX:
return VgaGcIndex;
case VGA_GC_DATA:
return VgaGcRegisters[VgaGcIndex];
default:
DPRINT1("VgaReadPort: Unknown port 0x%X\n", Port);
break;
}
return 0;
}
static inline VOID VgaWriteSequencer(BYTE Data)
{
/* Save the value */
VgaSeqRegisters[VgaSeqIndex & VGA_SEQ_INDEX_MASK] = Data;
/* Check the index */
switch (VgaSeqIndex & VGA_SEQ_INDEX_MASK)
{
case SVGA_SEQ_UNLOCK_REG:
{
if ((Data & SVGA_SEQ_UNLOCK_MASK) == SVGA_SEQ_UNLOCKED)
{
/* Unlock SVGA extensions */
VgaSeqRegisters[SVGA_SEQ_UNLOCK_REG] = SVGA_SEQ_UNLOCKED;
}
else
{
/* Lock SVGA extensions */
VgaSeqRegisters[SVGA_SEQ_UNLOCK_REG] = SVGA_SEQ_LOCKED;
}
break;
}
}
}
static inline VOID VgaWriteGc(BYTE Data)
{
/* Save the value */
VgaGcRegisters[VgaGcIndex & VGA_GC_INDEX_MASK] = Data;
/* Check the index */
switch (VgaGcIndex & VGA_GC_INDEX_MASK)
{
case VGA_GC_MISC_REG:
{
/* Remove any existing VGA memory hook */
MemRemoveFastMemoryHook((PVOID)0xA0000, 0x20000);
if (VgaMiscRegister & VGA_MISC_RAM_ENABLED)
{
UCHAR MemoryMap = (VgaGcRegisters[VGA_GC_MISC_REG] >> 2) & 0x03;
/* Register a memory hook */
MemInstallFastMemoryHook((PVOID)MemoryBase[MemoryMap],
MemorySize[MemoryMap],
VgaReadMemory,
VgaWriteMemory);
}
/* The GC misc register decides if it's text or graphics mode */
ModeChanged = TRUE;
break;
}
}
}
static inline VOID VgaWriteCrtc(BYTE Data)
{
/* Save the value */
VgaCrtcRegisters[VgaCrtcIndex & VGA_CRTC_INDEX_MASK] = Data;
/* Check the index */
switch (VgaCrtcIndex & VGA_CRTC_INDEX_MASK)
{
case VGA_CRTC_END_HORZ_DISP_REG:
case VGA_CRTC_VERT_DISP_END_REG:
case VGA_CRTC_OVERFLOW_REG:
case VGA_CRTC_MAX_SCAN_LINE_REG:
{
/* The video mode has changed */
ModeChanged = TRUE;
break;
}
case VGA_CRTC_CURSOR_LOC_LOW_REG:
case VGA_CRTC_CURSOR_LOC_HIGH_REG:
case VGA_CRTC_CURSOR_START_REG:
case VGA_CRTC_CURSOR_END_REG:
{
/* Set the cursor changed flag */
CursorChanged = TRUE;
break;
}
}
}
static inline VOID VgaWriteDac(BYTE Data)
{
UINT i;
PALETTEENTRY Entry;
/* Store the value in the latch */
VgaDacLatch[VgaDacLatchCounter++] = Data;
if (VgaDacLatchCounter < 3) return;
/* Reset the latch counter */
VgaDacLatchCounter = 0;
/* Set the DAC register values */
VgaDacRegisters[VgaDacIndex * 3] = VgaDacLatch[0];
VgaDacRegisters[VgaDacIndex * 3 + 1] = VgaDacLatch[1];
VgaDacRegisters[VgaDacIndex * 3 + 2] = VgaDacLatch[2];
/* Fill the entry structure */
Entry.peRed = VGA_DAC_TO_COLOR(VgaDacLatch[0]);
Entry.peGreen = VGA_DAC_TO_COLOR(VgaDacLatch[1]);
Entry.peBlue = VGA_DAC_TO_COLOR(VgaDacLatch[2]);
Entry.peFlags = 0;
/* Update the palette entry */
SetPaletteEntries(PaletteHandle, VgaDacIndex, 1, &Entry);
/* Check which text palette entries are affected */
for (i = 0; i <= VGA_AC_PAL_F_REG; i++)
{
if (VgaAcRegisters[i] == VgaDacIndex)
{
/* Update the text palette entry */
SetPaletteEntries(TextPaletteHandle, i, 1, &Entry);
}
}
/* Set the palette changed flag */
PaletteChanged = TRUE;
/* Update the index */
VgaDacIndex++;
VgaDacIndex %= VGA_MAX_COLORS;
}
static inline VOID VgaWriteAc(BYTE Data)
{
PALETTEENTRY Entry;
ASSERT(VgaAcIndex < VGA_AC_MAX_REG);
/* Save the value */
if (VgaAcIndex <= VGA_AC_PAL_F_REG)
{
if (VgaAcPalDisable) return;
// DbgPrint(" AC Palette Writing %d to index %d\n", Data, VgaAcIndex);
if (VgaAcRegisters[VgaAcIndex] != Data)
{
/* Update the AC register */
VgaAcRegisters[VgaAcIndex] = Data;
/* Fill the entry structure */
Entry.peRed = VGA_DAC_TO_COLOR(VgaDacRegisters[Data * 3]);
Entry.peGreen = VGA_DAC_TO_COLOR(VgaDacRegisters[Data * 3 + 1]);
Entry.peBlue = VGA_DAC_TO_COLOR(VgaDacRegisters[Data * 3 + 2]);
Entry.peFlags = 0;
/* Update the palette entry and set the palette change flag */
SetPaletteEntries(TextPaletteHandle, VgaAcIndex, 1, &Entry);
PaletteChanged = TRUE;
}
}
else
{
VgaAcRegisters[VgaAcIndex] = Data;
}
}
static VOID WINAPI VgaWritePort(USHORT Port, BYTE Data)
{
DPRINT("VgaWritePort: Port 0x%X, Data 0x%02X\n", Port, Data);
switch (Port)
{
case VGA_MISC_WRITE:
{
VgaMiscRegister = Data;
if (VgaMiscRegister & 0x01)
{
/* Color emulation */
DPRINT1("Color emulation\n");
/* Register the new I/O Ports */
RegisterIoPort(0x3D4, VgaReadPort, VgaWritePort); // VGA_CRTC_INDEX_COLOR
RegisterIoPort(0x3D5, VgaReadPort, VgaWritePort); // VGA_CRTC_DATA_COLOR
RegisterIoPort(0x3DA, VgaReadPort, VgaWritePort); // VGA_INSTAT1_READ_COLOR, VGA_FEATURE_WRITE_COLOR
/* Unregister the old ones */
UnregisterIoPort(0x3B4); // VGA_CRTC_INDEX_MONO
UnregisterIoPort(0x3B5); // VGA_CRTC_DATA_MONO
UnregisterIoPort(0x3BA); // VGA_INSTAT1_READ_MONO, VGA_FEATURE_WRITE_MONO
}
else
{
/* Monochrome emulation */
DPRINT1("Monochrome emulation\n");
/* Register the new I/O Ports */
RegisterIoPort(0x3B4, VgaReadPort, VgaWritePort); // VGA_CRTC_INDEX_MONO
RegisterIoPort(0x3B5, VgaReadPort, VgaWritePort); // VGA_CRTC_DATA_MONO
RegisterIoPort(0x3BA, VgaReadPort, VgaWritePort); // VGA_INSTAT1_READ_MONO, VGA_FEATURE_WRITE_MONO
/* Unregister the old ones */
UnregisterIoPort(0x3D4); // VGA_CRTC_INDEX_COLOR
UnregisterIoPort(0x3D5); // VGA_CRTC_DATA_COLOR
UnregisterIoPort(0x3DA); // VGA_INSTAT1_READ_COLOR, VGA_FEATURE_WRITE_COLOR
}
/* Remove any existing VGA memory hook */
MemRemoveFastMemoryHook((PVOID)0xA0000, 0x20000);
if (VgaMiscRegister & VGA_MISC_RAM_ENABLED)
{
UCHAR MemoryMap = (VgaGcRegisters[VGA_GC_MISC_REG] >> 2) & 0x03;
/* Register a memory hook */
MemInstallFastMemoryHook((PVOID)MemoryBase[MemoryMap],
MemorySize[MemoryMap],
VgaReadMemory,
VgaWriteMemory);
}
break;
}
case VGA_FEATURE_WRITE_MONO:
case VGA_FEATURE_WRITE_COLOR:
{
VgaFeatureRegister = Data;
break;
}
case VGA_AC_INDEX:
// case VGA_AC_WRITE:
{
if (!VgaAcLatch)
{
/* Change the index */
BYTE Index = Data & 0x1F;
if (Index < VGA_AC_MAX_REG) VgaAcIndex = Index;
/*
* Change palette protection by checking for
* the Palette Address Source bit.
*/
VgaAcPalDisable = (Data & 0x20) ? TRUE : FALSE;
}
else
{
/* Write the data */
VgaWriteAc(Data);
}
/* Toggle the latch */
VgaAcLatch = !VgaAcLatch;
break;
}
case VGA_SEQ_INDEX:
{
/* Set the sequencer index register */
if ((Data & 0x1F) < SVGA_SEQ_MAX_UNLOCKED_REG
&& (Data & 0x1F) != VGA_SEQ_MAX_REG)
{
VgaSeqIndex = Data;
}
break;
}
case VGA_SEQ_DATA:
{
/* Call the sequencer function */
VgaWriteSequencer(Data);
break;
}
case VGA_DAC_MASK:
{
if (SvgaHdrCounter == 4) SvgaHiddenRegister = Data;
else VgaDacMask = Data;
break;
}
case VGA_DAC_READ_INDEX:
{
VgaDacReadWrite = FALSE;
VgaDacIndex = Data;
VgaDacLatchCounter = 0;
break;
}
case VGA_DAC_WRITE_INDEX:
{
VgaDacReadWrite = TRUE;
VgaDacIndex = Data;
VgaDacLatchCounter = 0;
break;
}
case VGA_DAC_DATA:
{
/* Ignore writes in read mode */
if (VgaDacReadWrite) VgaWriteDac(Data & 0x3F);
break;
}
case VGA_CRTC_INDEX_MONO:
case VGA_CRTC_INDEX_COLOR:
{
/* Set the CRTC index register */
if (((Data & VGA_CRTC_INDEX_MASK) < SVGA_CRTC_MAX_UNLOCKED_REG)
&& ((Data & VGA_CRTC_INDEX_MASK) < SVGA_CRTC_UNUSED0_REG
|| (Data & VGA_CRTC_INDEX_MASK) > SVGA_CRTC_UNUSED6_REG)
&& (Data & VGA_CRTC_INDEX_MASK) != SVGA_CRTC_UNUSED7_REG)
{
VgaCrtcIndex = Data;
}
break;
}
case VGA_CRTC_DATA_MONO:
case VGA_CRTC_DATA_COLOR:
{
/* Call the CRTC function */
VgaWriteCrtc(Data);
break;
}
case VGA_GC_INDEX:
{
/* Set the GC index register */
if ((Data & VGA_GC_INDEX_MASK) < SVGA_GC_MAX_UNLOCKED_REG
&& (Data & VGA_GC_INDEX_MASK) != SVGA_GC_UNUSED0_REG
&& ((Data & VGA_GC_INDEX_MASK) < SVGA_GC_UNUSED1_REG
|| (Data & VGA_GC_INDEX_MASK) > SVGA_GC_UNUSED10_REG))
{
VgaGcIndex = Data;
}
break;
}
case VGA_GC_DATA:
{
/* Call the GC function */
VgaWriteGc(Data);
break;
}
default:
DPRINT1("VgaWritePort: Unknown port 0x%X, Data 0x%02X\n", Port, Data);
break;
}
SvgaHdrCounter = 0;
}
static inline VOID VgaVerticalRetrace(VOID)
{
/* If nothing has changed, just return */
// if (!ModeChanged && !CursorChanged && !PaletteChanged && !NeedsUpdate)
// return;
/* Change the display mode */
if (ModeChanged) VgaChangeMode();
/* Change the text cursor appearance */
if (CursorChanged) VgaUpdateTextCursor();
if (PaletteChanged)
{
/* Trigger a full update of the screen */
NeedsUpdate = TRUE;
UpdateRectangle.Left = 0;
UpdateRectangle.Top = 0;
UpdateRectangle.Right = CurrResolution.X;
UpdateRectangle.Bottom = CurrResolution.Y;
PaletteChanged = FALSE;
}
/* Update the contents of the framebuffer */
VgaUpdateFramebuffer();
/* Ignore if there's nothing to update */
if (!NeedsUpdate) return;
DPRINT("Updating screen rectangle (%d, %d, %d, %d)\n",
UpdateRectangle.Left,
UpdateRectangle.Top,
UpdateRectangle.Right,
UpdateRectangle.Bottom);
VgaConsoleRepaintScreen(&UpdateRectangle);
/* Clear the update flag */
NeedsUpdate = FALSE;
}
static VOID FASTCALL VgaHorizontalRetrace(ULONGLONG ElapsedTime)
{
ULONG VerticalTotal = VgaCrtcRegisters[VGA_CRTC_VERT_TOTAL_REG];
ULONG VerticalRetraceStart = VgaCrtcRegisters[VGA_CRTC_START_VERT_RETRACE_REG];
BOOLEAN BeforeVSync;
ULONG ElapsedCycles = CurrentCycleCount - HorizontalRetraceCycle;
ULONG Dots = (VgaSeqRegisters[VGA_SEQ_CLOCK_REG] & 1) ? 9 : 8;
ULONG HorizTotalDots = ((ULONG)VgaCrtcRegisters[VGA_CRTC_HORZ_TOTAL_REG] + 5) * Dots;
BYTE MaximumScanLine = 1 + (VgaCrtcRegisters[VGA_CRTC_MAX_SCAN_LINE_REG] & 0x1F);
ULONG HSyncsPerSecond, HSyncs;
UNREFERENCED_PARAMETER(ElapsedTime);
if (VgaAcRegisters[VGA_AC_CONTROL_REG] & VGA_AC_CONTROL_8BIT) HorizTotalDots >>= 1;
HSyncsPerSecond = VgaGetClockFrequency() / HorizTotalDots;
HSyncs = (ElapsedCycles * HSyncsPerSecond + (CurrentIps >> 1)) / CurrentIps;
if (HSyncs == 0) HSyncs = 1;
VerticalTotal |= (VgaCrtcRegisters[VGA_CRTC_OVERFLOW_REG] & VGA_CRTC_OVERFLOW_VT8) << 8;
VerticalTotal |= (VgaCrtcRegisters[VGA_CRTC_OVERFLOW_REG] & VGA_CRTC_OVERFLOW_VT9) << 4;
VerticalRetraceStart |= (VgaCrtcRegisters[VGA_CRTC_OVERFLOW_REG] & VGA_CRTC_OVERFLOW_VRS8) << 6;
VerticalRetraceStart |= (VgaCrtcRegisters[VGA_CRTC_OVERFLOW_REG] & VGA_CRTC_OVERFLOW_VRS9) << 2;
if (VgaGcRegisters[VGA_GC_MISC_REG] & VGA_GC_MISC_NOALPHA)
{
if (VgaCrtcRegisters[VGA_CRTC_MAX_SCAN_LINE_REG] & VGA_CRTC_MAXSCANLINE_DOUBLE)
{
VerticalRetraceStart <<= 1;
VerticalTotal <<= 1;
}
else
{
VerticalRetraceStart *= MaximumScanLine;
VerticalTotal *= MaximumScanLine;
}
}
/* Set the cycle */
HorizontalRetraceCycle = CurrentCycleCount;
/* Increment the scanline counter, but make sure we don't skip any part of the vertical retrace */
BeforeVSync = (ScanlineCounter < VerticalRetraceStart);
ScanlineCounter += HSyncs;
if (BeforeVSync && ScanlineCounter >= VerticalRetraceStart) ScanlineCounter = VerticalRetraceStart;
if (ScanlineCounter == VerticalRetraceStart)
{
/* Save the scanline size */
ScanlineSizeLatch = ((DWORD)VgaCrtcRegisters[VGA_CRTC_OFFSET_REG]
+ (((DWORD)VgaCrtcRegisters[SVGA_CRTC_EXT_DISPLAY_REG] & SVGA_CRTC_EXT_OFFSET_BIT8) << 4)) * 2;
if (VgaSeqRegisters[SVGA_SEQ_EXT_MODE_REG] & SVGA_SEQ_EXT_MODE_HIGH_RES) ScanlineSizeLatch <<= 2;
/* Save the starting address */
StartAddressLatch = MAKEWORD(VgaCrtcRegisters[VGA_CRTC_START_ADDR_LOW_REG],
VgaCrtcRegisters[VGA_CRTC_START_ADDR_HIGH_REG])
+ ((VgaCrtcRegisters[SVGA_CRTC_EXT_DISPLAY_REG] & SVGA_CRTC_EXT_ADDR_BIT16) << 16)
+ ((VgaCrtcRegisters[SVGA_CRTC_EXT_DISPLAY_REG] & SVGA_CRTC_EXT_ADDR_BITS1718) << 15)
+ ((VgaCrtcRegisters[SVGA_CRTC_OVERLAY_REG] & SVGA_CRTC_EXT_ADDR_BIT19) << 12)
+ (VgaCrtcRegisters[VGA_CRTC_PRESET_ROW_SCAN_REG] & 0x1F) * ScanlineSizeLatch
+ ((VgaCrtcRegisters[VGA_CRTC_PRESET_ROW_SCAN_REG] >> 5) & 3);
}
if (ScanlineCounter > VerticalTotal)
{
ScanlineCounter = 0;
VgaVerticalRetrace();
}
}
/* PUBLIC FUNCTIONS ***********************************************************/
COORD VgaGetDisplayResolution(VOID)
{
COORD Resolution;
BYTE MaximumScanLine = 1 + (VgaCrtcRegisters[VGA_CRTC_MAX_SCAN_LINE_REG] & 0x1F);
/* The low 8 bits are in the display registers */
Resolution.X = VgaCrtcRegisters[VGA_CRTC_END_HORZ_DISP_REG];
Resolution.Y = VgaCrtcRegisters[VGA_CRTC_VERT_DISP_END_REG];
/* Set the top bits from the overflow register */
if (VgaCrtcRegisters[VGA_CRTC_OVERFLOW_REG] & VGA_CRTC_OVERFLOW_VDE8)
{
Resolution.Y |= 1 << 8;
}
if (VgaCrtcRegisters[VGA_CRTC_OVERFLOW_REG] & VGA_CRTC_OVERFLOW_VDE9)
{
Resolution.Y |= 1 << 9;
}
/* Increase the values by 1 */
Resolution.X++;
Resolution.Y++;
if (VgaGcRegisters[VGA_GC_MISC_REG] & VGA_GC_MISC_NOALPHA)
{
/* In "High Resolution" mode, the width of a character is always 8 pixels */
if (VgaSeqRegisters[SVGA_SEQ_EXT_MODE_REG] & SVGA_SEQ_EXT_MODE_HIGH_RES)
{
Resolution.X *= 8;
}
else
{
/* Multiply the horizontal resolution by the 9/8 dot mode */
Resolution.X *= (VgaSeqRegisters[VGA_SEQ_CLOCK_REG] & VGA_SEQ_CLOCK_98DM)
? 8 : 9;
/* The horizontal resolution is halved in 8-bit mode */
if (VgaAcRegisters[VGA_AC_CONTROL_REG] & VGA_AC_CONTROL_8BIT) Resolution.X /= 2;
}
}
if (VgaCrtcRegisters[VGA_CRTC_MAX_SCAN_LINE_REG] & VGA_CRTC_MAXSCANLINE_DOUBLE)
{
/* Halve the vertical resolution */
Resolution.Y >>= 1;
}
else
{
/* Divide the vertical resolution by the maximum scan line (== font size in text mode) */
Resolution.Y /= MaximumScanLine;
}
/* Return the resolution */
return Resolution;
}
VOID VgaRefreshDisplay(VOID)
{
/* Save the scanline size */
ScanlineSizeLatch = ((DWORD)VgaCrtcRegisters[VGA_CRTC_OFFSET_REG]
+ (((DWORD)VgaCrtcRegisters[SVGA_CRTC_EXT_DISPLAY_REG] & SVGA_CRTC_EXT_OFFSET_BIT8) << 4)) * 2;
if (VgaSeqRegisters[SVGA_SEQ_EXT_MODE_REG] & SVGA_SEQ_EXT_MODE_HIGH_RES) ScanlineSizeLatch <<= 2;
/* Save the starting address */
StartAddressLatch = MAKEWORD(VgaCrtcRegisters[VGA_CRTC_START_ADDR_LOW_REG],
VgaCrtcRegisters[VGA_CRTC_START_ADDR_HIGH_REG])
+ ((VgaCrtcRegisters[SVGA_CRTC_EXT_DISPLAY_REG] & SVGA_CRTC_EXT_ADDR_BIT16) << 16)
+ ((VgaCrtcRegisters[SVGA_CRTC_EXT_DISPLAY_REG] & SVGA_CRTC_EXT_ADDR_BITS1718) << 15)
+ ((VgaCrtcRegisters[SVGA_CRTC_OVERLAY_REG] & SVGA_CRTC_EXT_ADDR_BIT19) << 12)
+ (VgaCrtcRegisters[VGA_CRTC_PRESET_ROW_SCAN_REG] & 0x1F) * ScanlineSizeLatch
+ ((VgaCrtcRegisters[VGA_CRTC_PRESET_ROW_SCAN_REG] >> 5) & 3);
VgaVerticalRetrace();
}
VOID FASTCALL VgaReadMemory(ULONG Address, PVOID Buffer, ULONG Size)
{
DWORD i;
DWORD VideoAddress;
PUCHAR BufPtr = (PUCHAR)Buffer;
DPRINT("VgaReadMemory: Address 0x%08X, Size %lu\n", Address, Size);
/* Ignore if video RAM access is disabled */
if (!Size) return;
if ((VgaMiscRegister & VGA_MISC_RAM_ENABLED) == 0) return;
if (!(VgaGcRegisters[VGA_GC_MODE_REG] & VGA_GC_MODE_READ))
{
VideoAddress = VgaTranslateAddress(Address);
/* Check for packed pixel, chain-4, and odd-even mode */
if (VgaSeqRegisters[SVGA_SEQ_EXT_MODE_REG] & SVGA_SEQ_EXT_MODE_HIGH_RES)
{
/* Just copy from the video memory */
PVOID VideoMemory = &VgaMemory[VideoAddress + (Address & 3)];
switch (Size)
{
case sizeof(UCHAR):
*(PUCHAR)Buffer = *(PUCHAR)VideoMemory;
return;
case sizeof(USHORT):
*(PUSHORT)Buffer = *(PUSHORT)VideoMemory;
return;
case sizeof(ULONG):
*(PULONG)Buffer = *(PULONG)VideoMemory;
return;
case sizeof(ULONGLONG):
*(PULONGLONG)Buffer = *(PULONGLONG)VideoMemory;
return;
default:
#if defined(__GNUC__)
__builtin_memcpy(Buffer, VideoMemory, Size);
#else
RtlCopyMemory(Buffer, VideoMemory, Size);
#endif
}
}
else if (VgaSeqRegisters[VGA_SEQ_MEM_REG] & VGA_SEQ_MEM_C4)
{
i = 0;
/* Write the unaligned part first */
if (Address & 3)
{
switch (Address & 3)
{
case 1:
BufPtr[i++] = VgaMemory[VideoAddress * VGA_NUM_BANKS + 1];
case 2:
BufPtr[i++] = VgaMemory[VideoAddress * VGA_NUM_BANKS + 2];
case 3:
BufPtr[i++] = VgaMemory[VideoAddress * VGA_NUM_BANKS + 3];
}
VideoAddress += 4;
}
/* Copy the aligned dwords */
while ((i + 3) < Size)
{
*(PULONG)&BufPtr[i] = *(PULONG)&VgaMemory[VideoAddress * VGA_NUM_BANKS];
i += 4;
VideoAddress += 4;
}
/* Write the remaining part */
if (i < Size)
{
switch (Size - i - 3)
{
case 3:
BufPtr[i] = VgaMemory[VideoAddress * VGA_NUM_BANKS + ((Address + i) & 3)];
i++;
case 2:
BufPtr[i] = VgaMemory[VideoAddress * VGA_NUM_BANKS + ((Address + i) & 3)];
i++;
case 1:
BufPtr[i] = VgaMemory[VideoAddress * VGA_NUM_BANKS + ((Address + i) & 3)];
i++;
}
}
}
else if (VgaGcRegisters[VGA_GC_MODE_REG] & VGA_GC_MODE_OE)
{
i = 0;
/* Check if the starting address is odd */
if (Address & 1)
{
BufPtr[i++] = VgaMemory[VideoAddress * VGA_NUM_BANKS + 1];
VideoAddress += 2;
}
while (i < (Size - 1))
{
*(PUSHORT)&BufPtr[i] = *(PUSHORT)&VgaMemory[VideoAddress * VGA_NUM_BANKS];
i += 2;
VideoAddress += 2;
}
/* Check if there is one more byte to read */
if (i == Size - 1) BufPtr[i] = VgaMemory[VideoAddress * VGA_NUM_BANKS + ((Address + i) & 1)];
}
else
{
/* Use the selected map */
BYTE Plane = VgaGcRegisters[VGA_GC_READ_MAP_SEL_REG] & 0x03;
for (i = 0; i < Size; i++)
{
/* Copy the value to the buffer */
BufPtr[i] = VgaMemory[(VideoAddress++) * VGA_NUM_BANKS + Plane];
}
}
}
else
{
const ULONG BitExpandInvertTable[] =
{
0xFFFFFFFF, 0xFFFFFF00, 0xFFFF00FF, 0xFFFF0000,
0xFF00FFFF, 0xFF00FF00, 0xFF0000FF, 0xFF000000,
0x00FFFFFF, 0x00FFFF00, 0x00FF00FF, 0x00FF0000,
0x0000FFFF, 0x0000FF00, 0x000000FF, 0x00000000
};
ULONG ColorCompareBytes = BitExpandInvertTable[VgaGcRegisters[VGA_GC_COLOR_COMPARE_REG] & 0x0F];
ULONG ColorIgnoreBytes = BitExpandInvertTable[VgaGcRegisters[VGA_GC_COLOR_IGNORE_REG] & 0x0F];
/*
* These values can also be computed in the following way, but using the table seems to be faster:
*
* ColorCompareBytes = VgaGcRegisters[VGA_GC_COLOR_COMPARE_REG] * 0x000204081;
* ColorCompareBytes &= 0x01010101;
* ColorCompareBytes = ~((ColorCompareBytes << 8) - ColorCompareBytes);
*
* ColorIgnoreBytes = VgaGcRegisters[VGA_GC_COLOR_IGNORE_REG] * 0x000204081;
* ColorIgnoreBytes &= 0x01010101;
* ColorIgnoreBytes = ~((ColorIgnoreBytes << 8) - ColorIgnoreBytes);
*/
/* Loop through each byte */
for (i = 0; i < Size; i++)
{
ULONG PlaneData = 0;
/* This should always return a plane 0 address */
VideoAddress = VgaTranslateAddress(Address + i);
/* Read all 4 planes */
PlaneData = *(PULONG)&VgaMemory[VideoAddress * VGA_NUM_BANKS];
/* Reverse the bytes for which the color compare register is zero */
PlaneData ^= ColorCompareBytes;
/* Apply the color ignore register */
PlaneData |= ColorIgnoreBytes;
/* Store the value in the buffer */
BufPtr[i] = (PlaneData & (PlaneData >> 8) & (PlaneData >> 16) & (PlaneData >> 24)) & 0xFF;
}
}
/* Load the latch registers */
VideoAddress = VgaTranslateAddress(Address + Size - 1);
*(PULONG)VgaLatchRegisters = *(PULONG)&VgaMemory[WRAP_OFFSET(VideoAddress) * VGA_NUM_BANKS];
}
BOOLEAN FASTCALL VgaWriteMemory(ULONG Address, PVOID Buffer, ULONG Size)
{
DWORD i, j;
DWORD VideoAddress;
PUCHAR BufPtr = (PUCHAR)Buffer;
DPRINT("VgaWriteMemory: Address 0x%08X, Size %lu\n", Address, Size);
/* Ignore if video RAM access is disabled */
if ((VgaMiscRegister & VGA_MISC_RAM_ENABLED) == 0) return TRUE;
/* Also ignore if write access to all planes is disabled */
if ((VgaSeqRegisters[VGA_SEQ_MASK_REG] & 0x0F) == 0x00) return TRUE;
if (!(VgaSeqRegisters[SVGA_SEQ_EXT_MODE_REG] & SVGA_SEQ_EXT_MODE_HIGH_RES))
{
/* Loop through each byte */
for (i = 0; i < Size; i++)
{
VideoAddress = VgaTranslateAddress(Address + i);
for (j = 0; j < VGA_NUM_BANKS; j++)
{
/* Make sure the page is writeable */
if (!(VgaSeqRegisters[VGA_SEQ_MASK_REG] & (1 << j))) continue;
/* Check if this is chain-4 mode */
if (VgaSeqRegisters[VGA_SEQ_MEM_REG] & VGA_SEQ_MEM_C4)
{
if (((Address + i) & 0x03) != j)
{
/* This plane will not be accessed */
continue;
}
}
/* Check if this is odd-even mode */
if (VgaGcRegisters[VGA_GC_MODE_REG] & VGA_GC_MODE_OE)
{
if (((Address + i) & 0x01) != (j & 1))
{
/* This plane will not be accessed */
continue;
}
}
/* Copy the value to the VGA memory */
VgaMemory[VideoAddress * VGA_NUM_BANKS + j] = VgaTranslateByteForWriting(BufPtr[i], j);
}
}
}
else
{
PVOID VideoMemory;
// TODO: Apply the page write mask!
// TODO: Check whether the write mode stuff applies to packed-pixel modes
/* Just copy to the video memory */
VideoAddress = VgaTranslateAddress(Address);
VideoMemory = &VgaMemory[VideoAddress + (Address & 3)];
switch (Size)
{
case sizeof(UCHAR):
*(PUCHAR)VideoMemory = *(PUCHAR)Buffer;
return TRUE;
case sizeof(USHORT):
*(PUSHORT)VideoMemory = *(PUSHORT)Buffer;
return TRUE;
case sizeof(ULONG):
*(PULONG)VideoMemory = *(PULONG)Buffer;
return TRUE;
case sizeof(ULONGLONG):
*(PULONGLONG)VideoMemory = *(PULONGLONG)Buffer;
return TRUE;
default:
#if defined(__GNUC__)
__builtin_memcpy(VideoMemory, Buffer, Size);
#else
RtlCopyMemory(VideoMemory, Buffer, Size);
#endif
}
}
return TRUE;
}
VOID VgaClearMemory(VOID)
{
RtlZeroMemory(VgaMemory, sizeof(VgaMemory));
}
VOID VgaWriteTextModeFont(UINT FontNumber, CONST UCHAR* FontData, UINT Height)
{
UINT i, j;
ASSERT(Height <= VGA_MAX_FONT_HEIGHT);
for (i = 0; i < VGA_FONT_CHARACTERS; i++)
{
/* Write the character */
for (j = 0; j < Height; j++)
{
VgaMemory[(i * VGA_MAX_FONT_HEIGHT + j) * VGA_NUM_BANKS + VGA_FONT_BANK] = FontData[i * Height + j];
}
/* Clear the unused part */
for (j = Height; j < VGA_MAX_FONT_HEIGHT; j++)
{
VgaMemory[(i * VGA_MAX_FONT_HEIGHT + j) * VGA_NUM_BANKS + VGA_FONT_BANK] = 0;
}
}
}
BOOLEAN VgaInitialize(HANDLE TextHandle)
{
if (!VgaConsoleInitialize(TextHandle)) return FALSE;
/* Clear the SEQ, GC, CRTC and AC registers */
RtlZeroMemory(VgaSeqRegisters , sizeof(VgaSeqRegisters ));
RtlZeroMemory(VgaGcRegisters , sizeof(VgaGcRegisters ));
RtlZeroMemory(VgaCrtcRegisters, sizeof(VgaCrtcRegisters));
RtlZeroMemory(VgaAcRegisters , sizeof(VgaAcRegisters ));
/* Initialize the VGA palette and fail if it isn't successfully created */
if (!VgaInitializePalette()) return FALSE;
/***/ VgaResetPalette(); /***/
/* Reset the sequencer */
VgaResetSequencer();
/* Clear the VGA memory */
VgaClearMemory();
/* Register the I/O Ports */
RegisterIoPort(0x3CC, VgaReadPort, NULL); // VGA_MISC_READ
RegisterIoPort(0x3C2, VgaReadPort, VgaWritePort); // VGA_MISC_WRITE, VGA_INSTAT0_READ
RegisterIoPort(0x3CA, VgaReadPort, NULL); // VGA_FEATURE_READ
RegisterIoPort(0x3C0, VgaReadPort, VgaWritePort); // VGA_AC_INDEX, VGA_AC_WRITE
RegisterIoPort(0x3C1, VgaReadPort, NULL); // VGA_AC_READ
RegisterIoPort(0x3C4, VgaReadPort, VgaWritePort); // VGA_SEQ_INDEX
RegisterIoPort(0x3C5, VgaReadPort, VgaWritePort); // VGA_SEQ_DATA
RegisterIoPort(0x3C6, VgaReadPort, VgaWritePort); // VGA_DAC_MASK
RegisterIoPort(0x3C7, VgaReadPort, VgaWritePort); // VGA_DAC_READ_INDEX
RegisterIoPort(0x3C8, VgaReadPort, VgaWritePort); // VGA_DAC_WRITE_INDEX
RegisterIoPort(0x3C9, VgaReadPort, VgaWritePort); // VGA_DAC_DATA
RegisterIoPort(0x3CE, VgaReadPort, VgaWritePort); // VGA_GC_INDEX
RegisterIoPort(0x3CF, VgaReadPort, VgaWritePort); // VGA_GC_DATA
/* CGA ports for compatibility, unimplemented */
RegisterIoPort(0x3D8, VgaReadPort, VgaWritePort); // CGA_MODE_CTRL_REG
RegisterIoPort(0x3D9, VgaReadPort, VgaWritePort); // CGA_PAL_CTRL_REG
HSyncTimer = CreateHardwareTimer(HARDWARE_TIMER_ENABLED, HZ_TO_NS(31469), VgaHorizontalRetrace);
/* Return success */
return TRUE;
}
VOID VgaCleanup(VOID)
{
/* Do a final display refresh */
VgaRefreshDisplay();
DestroyHardwareTimer(HSyncTimer);
/* Leave the current video mode */
VgaLeaveCurrentMode(); // ScreenMode
MemRemoveFastMemoryHook((PVOID)0xA0000, 0x20000);
VgaConsoleCleanup();
}
/* EOF */
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