claymation / osxp

EFI boot loader for running Windows XP on Intel Macs, from the 2006 Windows On Mac hacker challenge

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osxp / textmode.c
100644 483 lines (448 sloc) 17.737 kb
raw blame history 
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#include "OSXP.h"
 
#define	VGA_AC_INDEX		0x3C0
#define	VGA_AC_WRITE		0x3C0
#define	VGA_AC_READ		0x3C1
#define	VGA_MISC_WRITE		0x3C2
#define VGA_SEQ_INDEX		0x3C4
#define VGA_SEQ_DATA		0x3C5
#define	VGA_DAC_READ_INDEX	0x3C7
#define	VGA_DAC_WRITE_INDEX	0x3C8
#define	VGA_DAC_DATA		0x3C9
#define	VGA_MISC_READ		0x3CC
#define VGA_GC_INDEX 		0x3CE
#define VGA_GC_DATA 		0x3CF
/*			COLOR emulation		MONO emulation */
#define VGA_CRTC_INDEX		0x3D4		/* 0x3B4 */
#define VGA_CRTC_DATA		0x3D5		/* 0x3B5 */
#define	VGA_INSTAT_READ		0x3DA
 
#define	VGA_NUM_SEQ_REGS	5
#define	VGA_NUM_CRTC_REGS	25
#define	VGA_NUM_GC_REGS		9
#define	VGA_NUM_AC_REGS		21
#define	VGA_NUM_REGS		(1 + VGA_NUM_SEQ_REGS + VGA_NUM_CRTC_REGS + \
				VGA_NUM_GC_REGS + VGA_NUM_AC_REGS)
unsigned char g_80x50_text[] =
{
/* MISC */
	0x67,
/* SEQ */
	0x03, 0x00, 0x03, 0x00, 0x02,
/* CRTC */
	0x5F, 0x4F, 0x50, 0x82, 0x55, 0x81, 0xBF, 0x1F,
	0x00, 0x47, 0x06, 0x07, 0x00, 0x00, 0x01, 0x40,
	0x9C, 0x8E, 0x8F, 0x28, 0x1F, 0x96, 0xB9, 0xA3,
	0xFF, 
/* GC */
	0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x0E, 0x00,
	0xFF, 
/* AC */
	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x14, 0x07,
	0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
	0x0C, 0x00, 0x0F, 0x08, 0x00,
};
 
static unsigned char g_8x8_font[2048] =
{
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x7E, 0x81, 0xA5, 0x81, 0xBD, 0x99, 0x81, 0x7E,
	0x7E, 0xFF, 0xDB, 0xFF, 0xC3, 0xE7, 0xFF, 0x7E,
	0x6C, 0xFE, 0xFE, 0xFE, 0x7C, 0x38, 0x10, 0x00,
	0x10, 0x38, 0x7C, 0xFE, 0x7C, 0x38, 0x10, 0x00,
	0x38, 0x7C, 0x38, 0xFE, 0xFE, 0x92, 0x10, 0x7C,
	0x00, 0x10, 0x38, 0x7C, 0xFE, 0x7C, 0x38, 0x7C,
	0x00, 0x00, 0x18, 0x3C, 0x3C, 0x18, 0x00, 0x00,
	0xFF, 0xFF, 0xE7, 0xC3, 0xC3, 0xE7, 0xFF, 0xFF,
	0x00, 0x3C, 0x66, 0x42, 0x42, 0x66, 0x3C, 0x00,
	0xFF, 0xC3, 0x99, 0xBD, 0xBD, 0x99, 0xC3, 0xFF,
	0x0F, 0x07, 0x0F, 0x7D, 0xCC, 0xCC, 0xCC, 0x78,
	0x3C, 0x66, 0x66, 0x66, 0x3C, 0x18, 0x7E, 0x18,
	0x3F, 0x33, 0x3F, 0x30, 0x30, 0x70, 0xF0, 0xE0,
	0x7F, 0x63, 0x7F, 0x63, 0x63, 0x67, 0xE6, 0xC0,
	0x99, 0x5A, 0x3C, 0xE7, 0xE7, 0x3C, 0x5A, 0x99,
	0x80, 0xE0, 0xF8, 0xFE, 0xF8, 0xE0, 0x80, 0x00,
	0x02, 0x0E, 0x3E, 0xFE, 0x3E, 0x0E, 0x02, 0x00,
	0x18, 0x3C, 0x7E, 0x18, 0x18, 0x7E, 0x3C, 0x18, 
	0x66, 0x66, 0x66, 0x66, 0x66, 0x00, 0x66, 0x00, 
	0x7F, 0xDB, 0xDB, 0x7B, 0x1B, 0x1B, 0x1B, 0x00, 
	0x3E, 0x63, 0x38, 0x6C, 0x6C, 0x38, 0x86, 0xFC, 
	0x00, 0x00, 0x00, 0x00, 0x7E, 0x7E, 0x7E, 0x00, 
	0x18, 0x3C, 0x7E, 0x18, 0x7E, 0x3C, 0x18, 0xFF,
	0x18, 0x3C, 0x7E, 0x18, 0x18, 0x18, 0x18, 0x00,
	0x18, 0x18, 0x18, 0x18, 0x7E, 0x3C, 0x18, 0x00,
	0x00, 0x18, 0x0C, 0xFE, 0x0C, 0x18, 0x00, 0x00, 
	0x00, 0x30, 0x60, 0xFE, 0x60, 0x30, 0x00, 0x00, 
	0x00, 0x00, 0xC0, 0xC0, 0xC0, 0xFE, 0x00, 0x00, 
	0x00, 0x24, 0x66, 0xFF, 0x66, 0x24, 0x00, 0x00, 
	0x00, 0x18, 0x3C, 0x7E, 0xFF, 0xFF, 0x00, 0x00, 
	0x00, 0xFF, 0xFF, 0x7E, 0x3C, 0x18, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x18, 0x3C, 0x3C, 0x18, 0x18, 0x00, 0x18, 0x00,
	0x6C, 0x6C, 0x6C, 0x00, 0x00, 0x00, 0x00, 0x00, 
	0x6C, 0x6C, 0xFE, 0x6C, 0xFE, 0x6C, 0x6C, 0x00, 
	0x18, 0x7E, 0xC0, 0x7C, 0x06, 0xFC, 0x18, 0x00, 
	0x00, 0xC6, 0xCC, 0x18, 0x30, 0x66, 0xC6, 0x00,
	0x38, 0x6C, 0x38, 0x76, 0xDC, 0xCC, 0x76, 0x00,
	0x30, 0x30, 0x60, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x18, 0x30, 0x60, 0x60, 0x60, 0x30, 0x18, 0x00, 
	0x60, 0x30, 0x18, 0x18, 0x18, 0x30, 0x60, 0x00,
	0x00, 0x66, 0x3C, 0xFF, 0x3C, 0x66, 0x00, 0x00, 
	0x00, 0x18, 0x18, 0x7E, 0x18, 0x18, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x30,
	0x00, 0x00, 0x00, 0x7E, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x00,
	0x06, 0x0C, 0x18, 0x30, 0x60, 0xC0, 0x80, 0x00,
	0x7C, 0xCE, 0xDE, 0xF6, 0xE6, 0xC6, 0x7C, 0x00, 
	0x30, 0x70, 0x30, 0x30, 0x30, 0x30, 0xFC, 0x00, 
	0x78, 0xCC, 0x0C, 0x38, 0x60, 0xCC, 0xFC, 0x00, 
	0x78, 0xCC, 0x0C, 0x38, 0x0C, 0xCC, 0x78, 0x00, 
	0x1C, 0x3C, 0x6C, 0xCC, 0xFE, 0x0C, 0x1E, 0x00, 
	0xFC, 0xC0, 0xF8, 0x0C, 0x0C, 0xCC, 0x78, 0x00, 
	0x38, 0x60, 0xC0, 0xF8, 0xCC, 0xCC, 0x78, 0x00,
	0xFC, 0xCC, 0x0C, 0x18, 0x30, 0x30, 0x30, 0x00,
	0x78, 0xCC, 0xCC, 0x78, 0xCC, 0xCC, 0x78, 0x00, 
	0x78, 0xCC, 0xCC, 0x7C, 0x0C, 0x18, 0x70, 0x00, 
	0x00, 0x18, 0x18, 0x00, 0x00, 0x18, 0x18, 0x00, 
	0x00, 0x18, 0x18, 0x00, 0x00, 0x18, 0x18, 0x30, 
	0x18, 0x30, 0x60, 0xC0, 0x60, 0x30, 0x18, 0x00, 
	0x00, 0x00, 0x7E, 0x00, 0x7E, 0x00, 0x00, 0x00, 
	0x60, 0x30, 0x18, 0x0C, 0x18, 0x30, 0x60, 0x00,
	0x3C, 0x66, 0x0C, 0x18, 0x18, 0x00, 0x18, 0x00, 
	0x7C, 0xC6, 0xDE, 0xDE, 0xDC, 0xC0, 0x7C, 0x00, 
	0x30, 0x78, 0xCC, 0xCC, 0xFC, 0xCC, 0xCC, 0x00, 
	0xFC, 0x66, 0x66, 0x7C, 0x66, 0x66, 0xFC, 0x00, 
	0x3C, 0x66, 0xC0, 0xC0, 0xC0, 0x66, 0x3C, 0x00, 
	0xF8, 0x6C, 0x66, 0x66, 0x66, 0x6C, 0xF8, 0x00, 
	0xFE, 0x62, 0x68, 0x78, 0x68, 0x62, 0xFE, 0x00, 
	0xFE, 0x62, 0x68, 0x78, 0x68, 0x60, 0xF0, 0x00,
	0x3C, 0x66, 0xC0, 0xC0, 0xCE, 0x66, 0x3A, 0x00, 
	0xCC, 0xCC, 0xCC, 0xFC, 0xCC, 0xCC, 0xCC, 0x00, 
	0x78, 0x30, 0x30, 0x30, 0x30, 0x30, 0x78, 0x00, 
	0x1E, 0x0C, 0x0C, 0x0C, 0xCC, 0xCC, 0x78, 0x00, 
	0xE6, 0x66, 0x6C, 0x78, 0x6C, 0x66, 0xE6, 0x00, 
	0xF0, 0x60, 0x60, 0x60, 0x62, 0x66, 0xFE, 0x00, 
	0xC6, 0xEE, 0xFE, 0xFE, 0xD6, 0xC6, 0xC6, 0x00,
	0xC6, 0xE6, 0xF6, 0xDE, 0xCE, 0xC6, 0xC6, 0x00, 
	0x38, 0x6C, 0xC6, 0xC6, 0xC6, 0x6C, 0x38, 0x00, 
	0xFC, 0x66, 0x66, 0x7C, 0x60, 0x60, 0xF0, 0x00, 
	0x7C, 0xC6, 0xC6, 0xC6, 0xD6, 0x7C, 0x0E, 0x00, 
	0xFC, 0x66, 0x66, 0x7C, 0x6C, 0x66, 0xE6, 0x00,
	0x7C, 0xC6, 0xE0, 0x78, 0x0E, 0xC6, 0x7C, 0x00, 
	0xFC, 0xB4, 0x30, 0x30, 0x30, 0x30, 0x78, 0x00,
	0xCC, 0xCC, 0xCC, 0xCC, 0xCC, 0xCC, 0xFC, 0x00, 
	0xCC, 0xCC, 0xCC, 0xCC, 0xCC, 0x78, 0x30, 0x00,
	0xC6, 0xC6, 0xC6, 0xC6, 0xD6, 0xFE, 0x6C, 0x00, 
	0xC6, 0xC6, 0x6C, 0x38, 0x6C, 0xC6, 0xC6, 0x00, 
	0xCC, 0xCC, 0xCC, 0x78, 0x30, 0x30, 0x78, 0x00,
	0xFE, 0xC6, 0x8C, 0x18, 0x32, 0x66, 0xFE, 0x00,
	0x78, 0x60, 0x60, 0x60, 0x60, 0x60, 0x78, 0x00,
	0xC0, 0x60, 0x30, 0x18, 0x0C, 0x06, 0x02, 0x00,
	0x78, 0x18, 0x18, 0x18, 0x18, 0x18, 0x78, 0x00, 
	0x10, 0x38, 0x6C, 0xC6, 0x00, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 
	0x30, 0x30, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x78, 0x0C, 0x7C, 0xCC, 0x76, 0x00, 
	0xE0, 0x60, 0x60, 0x7C, 0x66, 0x66, 0xDC, 0x00, 
	0x00, 0x00, 0x78, 0xCC, 0xC0, 0xCC, 0x78, 0x00,
	0x1C, 0x0C, 0x0C, 0x7C, 0xCC, 0xCC, 0x76, 0x00,
	0x00, 0x00, 0x78, 0xCC, 0xFC, 0xC0, 0x78, 0x00, 
	0x38, 0x6C, 0x64, 0xF0, 0x60, 0x60, 0xF0, 0x00, 
	0x00, 0x00, 0x76, 0xCC, 0xCC, 0x7C, 0x0C, 0xF8, 
	0xE0, 0x60, 0x6C, 0x76, 0x66, 0x66, 0xE6, 0x00, 
	0x30, 0x00, 0x70, 0x30, 0x30, 0x30, 0x78, 0x00, 
	0x0C, 0x00, 0x1C, 0x0C, 0x0C, 0xCC, 0xCC, 0x78, 
	0xE0, 0x60, 0x66, 0x6C, 0x78, 0x6C, 0xE6, 0x00,
	0x70, 0x30, 0x30, 0x30, 0x30, 0x30, 0x78, 0x00, 
	0x00, 0x00, 0xCC, 0xFE, 0xFE, 0xD6, 0xD6, 0x00, 
	0x00, 0x00, 0xB8, 0xCC, 0xCC, 0xCC, 0xCC, 0x00, 
	0x00, 0x00, 0x78, 0xCC, 0xCC, 0xCC, 0x78, 0x00, 
	0x00, 0x00, 0xDC, 0x66, 0x66, 0x7C, 0x60, 0xF0, 
	0x00, 0x00, 0x76, 0xCC, 0xCC, 0x7C, 0x0C, 0x1E, 
	0x00, 0x00, 0xDC, 0x76, 0x62, 0x60, 0xF0, 0x00, 
	0x00, 0x00, 0x7C, 0xC0, 0x70, 0x1C, 0xF8, 0x00,
	0x10, 0x30, 0xFC, 0x30, 0x30, 0x34, 0x18, 0x00, 
	0x00, 0x00, 0xCC, 0xCC, 0xCC, 0xCC, 0x76, 0x00, 
	0x00, 0x00, 0xCC, 0xCC, 0xCC, 0x78, 0x30, 0x00, 
	0x00, 0x00, 0xC6, 0xC6, 0xD6, 0xFE, 0x6C, 0x00, 
	0x00, 0x00, 0xC6, 0x6C, 0x38, 0x6C, 0xC6, 0x00, 
	0x00, 0x00, 0xCC, 0xCC, 0xCC, 0x7C, 0x0C, 0xF8, 
	0x00, 0x00, 0xFC, 0x98, 0x30, 0x64, 0xFC, 0x00,
	0x1C, 0x30, 0x30, 0xE0, 0x30, 0x30, 0x1C, 0x00, 
	0x18, 0x18, 0x18, 0x00, 0x18, 0x18, 0x18, 0x00, 
	0xE0, 0x30, 0x30, 0x1C, 0x30, 0x30, 0xE0, 0x00, 
	0x76, 0xDC, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
	0x00, 0x10, 0x38, 0x6C, 0xC6, 0xC6, 0xFE, 0x00,
	0x7C, 0xC6, 0xC0, 0xC6, 0x7C, 0x0C, 0x06, 0x7C, 
	0x00, 0xCC, 0x00, 0xCC, 0xCC, 0xCC, 0x76, 0x00,
	0x1C, 0x00, 0x78, 0xCC, 0xFC, 0xC0, 0x78, 0x00, 
	0x7E, 0x81, 0x3C, 0x06, 0x3E, 0x66, 0x3B, 0x00,
	0xCC, 0x00, 0x78, 0x0C, 0x7C, 0xCC, 0x76, 0x00, 
	0xE0, 0x00, 0x78, 0x0C, 0x7C, 0xCC, 0x76, 0x00, 
	0x30, 0x30, 0x78, 0x0C, 0x7C, 0xCC, 0x76, 0x00,
	0x00, 0x00, 0x7C, 0xC6, 0xC0, 0x78, 0x0C, 0x38,
	0x7E, 0x81, 0x3C, 0x66, 0x7E, 0x60, 0x3C, 0x00,
	0xCC, 0x00, 0x78, 0xCC, 0xFC, 0xC0, 0x78, 0x00,
	0xE0, 0x00, 0x78, 0xCC, 0xFC, 0xC0, 0x78, 0x00, 
	0xCC, 0x00, 0x70, 0x30, 0x30, 0x30, 0x78, 0x00, 
	0x7C, 0x82, 0x38, 0x18, 0x18, 0x18, 0x3C, 0x00, 
	0xE0, 0x00, 0x70, 0x30, 0x30, 0x30, 0x78, 0x00, 
	0xC6, 0x10, 0x7C, 0xC6, 0xFE, 0xC6, 0xC6, 0x00, 
	0x30, 0x30, 0x00, 0x78, 0xCC, 0xFC, 0xCC, 0x00, 
	0x1C, 0x00, 0xFC, 0x60, 0x78, 0x60, 0xFC, 0x00,
	0x00, 0x00, 0x7F, 0x0C, 0x7F, 0xCC, 0x7F, 0x00,
	0x3E, 0x6C, 0xCC, 0xFE, 0xCC, 0xCC, 0xCE, 0x00, 
	0x78, 0x84, 0x00, 0x78, 0xCC, 0xCC, 0x78, 0x00, 
	0x00, 0xCC, 0x00, 0x78, 0xCC, 0xCC, 0x78, 0x00, 
	0x00, 0xE0, 0x00, 0x78, 0xCC, 0xCC, 0x78, 0x00, 
	0x78, 0x84, 0x00, 0xCC, 0xCC, 0xCC, 0x76, 0x00, 
	0x00, 0xE0, 0x00, 0xCC, 0xCC, 0xCC, 0x76, 0x00, 
	0x00, 0xCC, 0x00, 0xCC, 0xCC, 0x7C, 0x0C, 0xF8,
	0xC3, 0x18, 0x3C, 0x66, 0x66, 0x3C, 0x18, 0x00, 
	0xCC, 0x00, 0xCC, 0xCC, 0xCC, 0xCC, 0x78, 0x00, 
	0x18, 0x18, 0x7E, 0xC0, 0xC0, 0x7E, 0x18, 0x18, 
	0x38, 0x6C, 0x64, 0xF0, 0x60, 0xE6, 0xFC, 0x00, 
	0xCC, 0xCC, 0x78, 0x30, 0xFC, 0x30, 0xFC, 0x30, 
	0xF8, 0xCC, 0xCC, 0xFA, 0xC6, 0xCF, 0xC6, 0xC3, 
	0x0E, 0x1B, 0x18, 0x3C, 0x18, 0x18, 0xD8, 0x70, 
	0x1C, 0x00, 0x78, 0x0C, 0x7C, 0xCC, 0x76, 0x00,
	0x38, 0x00, 0x70, 0x30, 0x30, 0x30, 0x78, 0x00, 
	0x00, 0x1C, 0x00, 0x78, 0xCC, 0xCC, 0x78, 0x00, 
	0x00, 0x1C, 0x00, 0xCC, 0xCC, 0xCC, 0x76, 0x00, 
	0x00, 0xF8, 0x00, 0xB8, 0xCC, 0xCC, 0xCC, 0x00, 
	0xFC, 0x00, 0xCC, 0xEC, 0xFC, 0xDC, 0xCC, 0x00, 
	0x3C, 0x6C, 0x6C, 0x3E, 0x00, 0x7E, 0x00, 0x00, 
	0x38, 0x6C, 0x6C, 0x38, 0x00, 0x7C, 0x00, 0x00,
	0x18, 0x00, 0x18, 0x18, 0x30, 0x66, 0x3C, 0x00, 
	0x00, 0x00, 0x00, 0xFC, 0xC0, 0xC0, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0xFC, 0x0C, 0x0C, 0x00, 0x00, 
	0xC6, 0xCC, 0xD8, 0x36, 0x6B, 0xC2, 0x84, 0x0F, 
	0xC3, 0xC6, 0xCC, 0xDB, 0x37, 0x6D, 0xCF, 0x03,
	0x18, 0x00, 0x18, 0x18, 0x3C, 0x3C, 0x18, 0x00, 
	0x00, 0x33, 0x66, 0xCC, 0x66, 0x33, 0x00, 0x00,
	0x00, 0xCC, 0x66, 0x33, 0x66, 0xCC, 0x00, 0x00, 
	0x22, 0x88, 0x22, 0x88, 0x22, 0x88, 0x22, 0x88,
	0x55, 0xAA, 0x55, 0xAA, 0x55, 0xAA, 0x55, 0xAA, 
	0xDB, 0xF6, 0xDB, 0x6F, 0xDB, 0x7E, 0xD7, 0xED, 
	0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
	0x18, 0x18, 0x18, 0x18, 0xF8, 0x18, 0x18, 0x18,
	0x18, 0x18, 0xF8, 0x18, 0xF8, 0x18, 0x18, 0x18,
	0x36, 0x36, 0x36, 0x36, 0xF6, 0x36, 0x36, 0x36,
	0x00, 0x00, 0x00, 0x00, 0xFE, 0x36, 0x36, 0x36, 
	0x00, 0x00, 0xF8, 0x18, 0xF8, 0x18, 0x18, 0x18, 
	0x36, 0x36, 0xF6, 0x06, 0xF6, 0x36, 0x36, 0x36, 
	0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 
	0x00, 0x00, 0xFE, 0x06, 0xF6, 0x36, 0x36, 0x36, 
	0x36, 0x36, 0xF6, 0x06, 0xFE, 0x00, 0x00, 0x00, 
	0x36, 0x36, 0x36, 0x36, 0xFE, 0x00, 0x00, 0x00,
	0x18, 0x18, 0xF8, 0x18, 0xF8, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0xF8, 0x18, 0x18, 0x18, 
	0x18, 0x18, 0x18, 0x18, 0x1F, 0x00, 0x00, 0x00, 
	0x18, 0x18, 0x18, 0x18, 0xFF, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0x00, 0xFF, 0x18, 0x18, 0x18, 
	0x18, 0x18, 0x18, 0x18, 0x1F, 0x18, 0x18, 0x18, 
	0x00, 0x00, 0x00, 0x00, 0xFF, 0x00, 0x00, 0x00, 
	0x18, 0x18, 0x18, 0x18, 0xFF, 0x18, 0x18, 0x18,
	0x18, 0x18, 0x1F, 0x18, 0x1F, 0x18, 0x18, 0x18, 
	0x36, 0x36, 0x36, 0x36, 0x37, 0x36, 0x36, 0x36, 
	0x36, 0x36, 0x37, 0x30, 0x3F, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x3F, 0x30, 0x37, 0x36, 0x36, 0x36, 
	0x36, 0x36, 0xF7, 0x00, 0xFF, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0xFF, 0x00, 0xF7, 0x36, 0x36, 0x36, 
	0x36, 0x36, 0x37, 0x30, 0x37, 0x36, 0x36, 0x36, 
	0x00, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0x00,
	0x36, 0x36, 0xF7, 0x00, 0xF7, 0x36, 0x36, 0x36, 
	0x18, 0x18, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0x00, 
	0x36, 0x36, 0x36, 0x36, 0xFF, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0xFF, 0x00, 0xFF, 0x18, 0x18, 0x18, 
	0x00, 0x00, 0x00, 0x00, 0xFF, 0x36, 0x36, 0x36, 
	0x36, 0x36, 0x36, 0x36, 0x3F, 0x00, 0x00, 0x00, 
	0x18, 0x18, 0x1F, 0x18, 0x1F, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x1F, 0x18, 0x1F, 0x18, 0x18, 0x18, 
	0x00, 0x00, 0x00, 0x00, 0x3F, 0x36, 0x36, 0x36, 
	0x36, 0x36, 0x36, 0x36, 0xFF, 0x36, 0x36, 0x36,
	0x18, 0x18, 0xFF, 0x18, 0xFF, 0x18, 0x18, 0x18, 
	0x18, 0x18, 0x18, 0x18, 0xF8, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x1F, 0x18, 0x18, 0x18, 
	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 
	0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0,
	0x0F, 0x0F, 0x0F, 0x0F, 0x0F, 0x0F, 0x0F, 0x0F, 
	0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x76, 0xDC, 0xC8, 0xDC, 0x76, 0x00,
	0x00, 0x78, 0xCC, 0xF8, 0xCC, 0xF8, 0xC0, 0xC0,
	0x00, 0xFC, 0xCC, 0xC0, 0xC0, 0xC0, 0xC0, 0x00,
	0x00, 0x00, 0xFE, 0x6C, 0x6C, 0x6C, 0x6C, 0x00,
	0xFC, 0xCC, 0x60, 0x30, 0x60, 0xCC, 0xFC, 0x00,
	0x00, 0x00, 0x7E, 0xD8, 0xD8, 0xD8, 0x70, 0x00,
	0x00, 0x66, 0x66, 0x66, 0x66, 0x7C, 0x60, 0xC0,
	0x00, 0x76, 0xDC, 0x18, 0x18, 0x18, 0x18, 0x00,
	0xFC, 0x30, 0x78, 0xCC, 0xCC, 0x78, 0x30, 0xFC,
	0x38, 0x6C, 0xC6, 0xFE, 0xC6, 0x6C, 0x38, 0x00,
	0x38, 0x6C, 0xC6, 0xC6, 0x6C, 0x6C, 0xEE, 0x00,
	0x1C, 0x30, 0x18, 0x7C, 0xCC, 0xCC, 0x78, 0x00,
	0x00, 0x00, 0x7E, 0xDB, 0xDB, 0x7E, 0x00, 0x00,
	0x06, 0x0C, 0x7E, 0xDB, 0xDB, 0x7E, 0x60, 0xC0,
	0x38, 0x60, 0xC0, 0xF8, 0xC0, 0x60, 0x38, 0x00,
	0x78, 0xCC, 0xCC, 0xCC, 0xCC, 0xCC, 0xCC, 0x00,
	0x00, 0x7E, 0x00, 0x7E, 0x00, 0x7E, 0x00, 0x00,
	0x18, 0x18, 0x7E, 0x18, 0x18, 0x00, 0x7E, 0x00,
	0x60, 0x30, 0x18, 0x30, 0x60, 0x00, 0xFC, 0x00,
	0x18, 0x30, 0x60, 0x30, 0x18, 0x00, 0xFC, 0x00,
	0x0E, 0x1B, 0x1B, 0x18, 0x18, 0x18, 0x18, 0x18,
	0x18, 0x18, 0x18, 0x18, 0x18, 0xD8, 0xD8, 0x70,
	0x18, 0x18, 0x00, 0x7E, 0x00, 0x18, 0x18, 0x00,
	0x00, 0x76, 0xDC, 0x00, 0x76, 0xDC, 0x00, 0x00,
	0x38, 0x6C, 0x6C, 0x38, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x18, 0x18, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00,
	0x0F, 0x0C, 0x0C, 0x0C, 0xEC, 0x6C, 0x3C, 0x1C,
	0x58, 0x6C, 0x6C, 0x6C, 0x6C, 0x00, 0x00, 0x00,
	0x70, 0x98, 0x30, 0x60, 0xF8, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x3C, 0x3C, 0x3C, 0x3C, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
 
inline unsigned char inportb(unsigned int port) 
{ 
   unsigned char ret; 
 
   asm volatile ("inb %%dx,%%al":"=a" (ret):"d" (port)); 
   return ret; 
} 
 
inline void outportb(unsigned int port,unsigned char value) 
{ 
   asm volatile ("outb %%al,%%dx": :"d" (port), "a" (value)); 
} 
 
void write_regs(unsigned char *regs)
{
	unsigned i;
	UINT8    input;
 
	/* write MISCELLANEOUS reg */
	outportb(VGA_MISC_WRITE, *regs);
	regs++;
 
	/* write SEQUENCER regs */
	for(i = 0; i < VGA_NUM_SEQ_REGS; i++) {
		outportb(VGA_SEQ_INDEX, i);
		outportb(VGA_SEQ_DATA, *regs);
		regs++;
	}
 
	/* unlock CRTC registers */
	outportb(VGA_CRTC_INDEX, 0x03);
        input = inportb(VGA_CRTC_DATA);
	outportb(VGA_CRTC_DATA, input | 0x80);
	outportb(VGA_CRTC_INDEX, 0x11);
        input = inportb(VGA_CRTC_DATA);
	outportb(VGA_CRTC_DATA, input & ~0x80);
 
	/* make sure they remain unlocked */
	regs[0x03] |= 0x80;
	regs[0x11] &= ~0x80;
 
	/* write CRTC regs */
	for(i = 0; i < VGA_NUM_CRTC_REGS; i++) {
		outportb(VGA_CRTC_INDEX, i);
		outportb(VGA_CRTC_DATA, *regs);
		regs++;
	}
 
	/* write GRAPHICS CONTROLLER regs */
	for(i = 0; i < VGA_NUM_GC_REGS; i++) {
		outportb(VGA_GC_INDEX, i);
		outportb(VGA_GC_DATA, *regs);
		regs++;
	}
 
	/* write ATTRIBUTE CONTROLLER regs */
	for(i = 0; i < VGA_NUM_AC_REGS; i++) {
		(void)inportb(VGA_INSTAT_READ);
		outportb(VGA_AC_INDEX, i);
		outportb(VGA_AC_WRITE, *regs);
		regs++;
	}
 
	/* lock 16-color palette and unblank display */
	(void)inportb(VGA_INSTAT_READ);
	outportb(VGA_AC_INDEX, 0x20);
}
 
static void set_plane(unsigned p)
{
	unsigned char pmask;
 
	p &= 3;
	pmask = 1 << p;
 
	/* set read plane */
	outportb(VGA_GC_INDEX, 4);
	outportb(VGA_GC_DATA, p);
 
	/* set write plane */
	outportb(VGA_SEQ_INDEX, 2);
	outportb(VGA_SEQ_DATA, pmask);
}
/*****************************************************************************
VGA framebuffer is at A000:0000, B000:0000, or B800:0000
depending on bits in GC 6
*****************************************************************************/
static unsigned get_fb_seg(void)
{
	unsigned seg;
 
	outportb(VGA_GC_INDEX, 6);
	seg = inportb(VGA_GC_DATA);
	seg >>= 2;
	seg &= 3;
	switch(seg)
	{
	case 0:
	case 1:
		seg = 0xA000;
		break;
	case 2:
		seg = 0xB000;
		break;
	case 3:
		seg = 0xB800;
		break;
	}
	return seg;
}
 
static void vmemwr(unsigned dst_off, unsigned char *src, unsigned count)
{
	EfiCopyMem((VOID *)((get_fb_seg() << 4) + dst_off), src, count);
}
 
static void write_font(unsigned char *buf, unsigned font_height)
{
	unsigned char seq2, seq4, gc4, gc5, gc6;
	unsigned i;
 
	/* save registers
	 * set_plane() modifies GC 4 and SEQ 2, so save them as well
	 */
	outportb(VGA_SEQ_INDEX, 2);
	seq2 = inportb(VGA_SEQ_DATA);
 
	outportb(VGA_SEQ_INDEX, 4);
	seq4 = inportb(VGA_SEQ_DATA);
 
	/* turn off even-odd addressing (set flat addressing)
	assume: chain-4 addressing already off */
	outportb(VGA_SEQ_DATA, seq4 | 0x04);
 
	outportb(VGA_GC_INDEX, 4);
	gc4 = inportb(VGA_GC_DATA);
 
	outportb(VGA_GC_INDEX, 5);
	gc5 = inportb(VGA_GC_DATA);
 
	/* turn off even-odd addressing */
	outportb(VGA_GC_DATA, gc5 & ~0x10);
 
	outportb(VGA_GC_INDEX, 6);
	gc6 = inportb(VGA_GC_DATA);
 
	/* turn off even-odd addressing */
	outportb(VGA_GC_DATA, gc6 & ~0x02);
 
	/* write font to plane P4 */
	set_plane(2);
 
	/* write font 0 */
	for(i = 0; i < 256; i++)
	{
		vmemwr(16384u * 0 + i * 32, buf, font_height);
		buf += font_height;
	}
 
	/* restore registers */
	outportb(VGA_SEQ_INDEX, 2);
	outportb(VGA_SEQ_DATA, seq2);
	outportb(VGA_SEQ_INDEX, 4);
	outportb(VGA_SEQ_DATA, seq4);
	outportb(VGA_GC_INDEX, 4);
	outportb(VGA_GC_DATA, gc4);
	outportb(VGA_GC_INDEX, 5);
	outportb(VGA_GC_DATA, gc5);
	outportb(VGA_GC_INDEX, 6);
	outportb(VGA_GC_DATA, gc6);
}
 
void Set80x50()
{
    write_regs(g_80x50_text);
    write_font(g_8x8_font, 8);
}