mirror of
https://github.com/reactos/reactos.git
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- Added in some code from XFree86 to save the vga state on the startup
and restore it on a bugcheck. svn path=/trunk/; revision=5836
This commit is contained in:
David Welch
parent
5d476a06de
commit
d7e545ac33
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@ -19,6 +19,7 @@ Source and inspiration from
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WINE (http://www.winehq.com)
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WinFree (http://www.stack.nl/~onno/win32/)
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Linux (http://www.kernel.org)
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XFree86 (http://www.xfree86.org/)
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References (Rex's at least)
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@ -16,7 +16,7 @@
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/* $Id: display.c,v 1.7 2003/08/24 11:58:16 dwelch Exp $
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/* $Id: display.c,v 1.8 2003/08/24 20:56:16 dwelch Exp $
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*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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@ -27,6 +27,35 @@
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* Created 08/10/99
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*/
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/*
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* Portions of this code are from the XFree86 Project and available from the
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* following license:
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*
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* Copyright (C) 1994-2003 The XFree86 Project, Inc. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* XFREE86 PROJECT BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CON-
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* NECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* Except as contained in this notice, the name of the XFree86 Project shall
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* not be used in advertising or otherwise to promote the sale, use or other
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* dealings in this Software without prior written authorization from the
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* XFree86 Project.
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*/
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/* DISPLAY OWNERSHIP
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*
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* So, who owns the physical display and is allowed to write to it?
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@ -98,18 +127,19 @@
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#define SCREEN_SYNCHRONIZATION
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#define VGA_AC_INDEX 0x3c0
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#define VGA_AC_READ 0x3c0
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#define VGA_AC_WRITE 0x3c1
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#define VGA_AC_READ 0x3c1
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#define VGA_AC_WRITE 0x3c0
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#define VGA_MISC_WRITE 0x3c2
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#define VGA_SEQ_INDEX 0x3c4
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#define VGA_SEQ_DATA 0x3c5
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#define VGA_DAC_MASK 0x3c8
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#define VGA_DAC_READ_INDEX 0x3c7
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#define VGA_DAC_WRITE_INDEX 0x3c8
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#define VGA_DAC_DATA 0x3c9
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#define VGA_FEATURE_READ 0x3ca
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#define VGA_MISC_READ 0x3cc
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#define VGA_GC_INDEX 0x3ce
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@ -137,6 +167,7 @@
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#define CHAR_ATTRIBUTE_BLACK 0x00 /* black on black */
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#define CHAR_ATTRIBUTE 0x17 /* grey on blue */
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#define FONT_AMOUNT (8*8192)
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/* VARIABLES ****************************************************************/
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@ -149,117 +180,18 @@ static BOOLEAN DisplayInitialized = FALSE;
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static BOOLEAN HalOwnsDisplay = TRUE;
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static WORD *VideoBuffer = NULL;
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static PUCHAR GraphVideoBuffer = NULL;
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static PHAL_RESET_DISPLAY_PARAMETERS HalResetDisplayParameters = NULL;
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static UCHAR TextPalette[64][3] =
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{
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{0, 0, 0} /* 0 */,
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{0, 0, 42} /* 1 */,
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{0, 42, 0} /* 2 */,
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{0, 42, 42} /* 3 */,
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{42, 0, 0} /* 4 */,
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{42, 42, 42} /* 5 */,
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{42, 42, 0} /* 6 */,
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{42, 42, 42} /* 7 */,
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{0, 0, 21} /* 8 */,
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{0, 0, 63} /* 9 */,
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{0, 42, 21} /* 10 */,
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{0, 42, 63} /* 11 */,
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{42, 0, 21} /* 12 */,
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{42, 0, 63} /* 13 */,
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{42, 42, 21} /* 14 */,
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{42, 42, 63} /* 15 */,
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{0, 21, 0} /* 16 */,
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{0, 21, 42} /* 17 */,
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{0, 63, 0} /* 18 */,
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{0, 63, 42} /* 19 */,
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{42, 21, 0} /* 20 */,
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{42, 21, 42} /* 21 */,
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{42, 63, 0} /* 22 */,
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{42, 63, 42} /* 23 */,
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{0, 21, 21} /* 24 */,
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{0, 21, 63} /* 25 */,
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{0, 63, 21} /* 26 */,
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{0, 63, 63} /* 27 */,
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{42, 21, 21} /* 28 */,
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{42, 21, 63} /* 29 */,
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{42, 63, 21} /* 30 */,
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{42, 63, 63} /* 31 */,
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{21, 0, 0} /* 32 */,
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{21, 0, 42} /* 33 */,
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{21, 42, 0} /* 34 */,
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{21, 42, 42} /* 35 */,
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{63, 0, 0} /* 36 */,
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{63, 0, 42} /* 37 */,
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{63, 42, 0} /* 38 */,
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{63, 42, 42} /* 39 */,
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{21, 0, 21} /* 40 */,
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{21, 0, 63} /* 41 */,
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{21, 42, 21} /* 42 */,
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{21, 42, 63} /* 43 */,
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{63, 42, 0} /* 44 */,
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{63, 0, 63} /* 45 */,
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{63, 42, 21} /* 46 */,
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{63, 42, 63} /* 47 */,
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{21, 21, 0} /* 48 */,
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{21, 21, 42} /* 49 */,
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{21, 63, 0} /* 50 */,
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{21, 63, 42} /* 51 */,
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{63, 21, 0} /* 52 */,
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{63, 21, 42} /* 53 */,
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{63, 63, 0} /* 54 */,
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{63, 63, 42} /* 55 */,
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{21, 21, 21} /* 56 */,
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{21, 21, 63} /* 57 */,
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{21, 63, 21} /* 58 */,
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{21, 63, 63} /* 59 */,
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{63, 21, 21} /* 60 */,
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{63, 21, 63} /* 61 */,
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{63, 63, 21} /* 62 */,
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{63, 63, 63} /* 63 */,
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};
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static UCHAR Text80x25Registers[] =
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{
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/* MISC */
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0x67,
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/* SEQ */
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0x03, 0x00, 0x03, 0x00, 0x02,
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/* CRTC */
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0x5F, 0x4F, 0x50, 0x82, 0x55, 0x81, 0xBF, 0x1F,
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0x00, 0x4F, 0x0D, 0x0E, 0x00, 0x00, 0x00, 0x50,
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0x9C, 0x0E, 0x8F, 0x28, 0x1F, 0x96, 0xB9, 0xA3,
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0xFF,
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/* GC */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x0E, 0x00,
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0xFF,
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/* AC */
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x14, 0x07,
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0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
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0x0C, 0x00, 0x0F, 0x08, 0x00
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};
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static UCHAR Text80x50Registers[] =
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{
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/* MISC */
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0x67,
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/* SEQ */
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0x03, 0x00, 0x03, 0x00, 0x02,
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/* CRTC */
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0x5F, 0x4F, 0x50, 0x82, 0x55, 0x81, 0xBF, 0x1F,
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0x00, 0x47, 0x06, 0x07, 0x00, 0x00, 0x01, 0x40,
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0x9C, 0x8E, 0x8F, 0x28, 0x1F, 0x96, 0xB9, 0xA3,
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0xFF,
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/* GC */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x0E, 0x00,
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0xFF,
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/* AC */
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x14, 0x07,
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0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
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0x0C, 0x00, 0x0F, 0x08, 0x00,
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};
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static UCHAR SavedTextPalette[768];
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static UCHAR SavedTextMiscOutReg;
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static UCHAR SavedTextCrtcReg[VGA_CRTC_NUM_REGISTERS];
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static UCHAR SavedTextAcReg[VGA_AC_NUM_REGISTERS];
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static UCHAR SavedTextGcReg[VGA_GC_NUM_REGISTERS];
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static UCHAR SavedTextSeqReg[VGA_SEQ_NUM_REGISTERS];
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static UCHAR SavedTextFont[2][FONT_AMOUNT];
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static BOOL TextPaletteEnabled = FALSE;
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/* STATIC FUNCTIONS *********************************************************/
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@ -306,64 +238,327 @@ HalPutCharacter (CHAR Character)
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}
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VOID STATIC
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HalSetDisplayMode(PUCHAR Registers)
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HalDisablePalette(VOID)
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{
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UCHAR Port;
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(VOID)READ_PORT_UCHAR((PUCHAR)VGA_INSTAT_READ);
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WRITE_PORT_UCHAR((PUCHAR)VGA_AC_INDEX, 0x20);
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TextPaletteEnabled = FALSE;
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}
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VOID STATIC
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HalEnablePalette(VOID)
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{
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(VOID)READ_PORT_UCHAR((PUCHAR)VGA_INSTAT_READ);
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WRITE_PORT_UCHAR((PUCHAR)VGA_AC_INDEX, 0x00);
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TextPaletteEnabled = TRUE;
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}
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UCHAR STATIC
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HalReadGc(ULONG Index)
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{
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WRITE_PORT_UCHAR((PUCHAR)VGA_GC_INDEX, Index);
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return(READ_PORT_UCHAR((PUCHAR)VGA_GC_DATA));
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}
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VOID STATIC
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HalWriteGc(ULONG Index, UCHAR Value)
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{
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WRITE_PORT_UCHAR((PUCHAR)VGA_GC_INDEX, Index);
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WRITE_PORT_UCHAR((PUCHAR)VGA_GC_DATA, Value);
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}
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UCHAR STATIC
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HalReadSeq(ULONG Index)
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{
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WRITE_PORT_UCHAR((PUCHAR)VGA_SEQ_INDEX, Index);
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return(READ_PORT_UCHAR((PUCHAR)VGA_SEQ_DATA));
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}
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VOID STATIC
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HalWriteSeq(ULONG Index, UCHAR Value)
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{
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WRITE_PORT_UCHAR((PUCHAR)VGA_SEQ_INDEX, Index);
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WRITE_PORT_UCHAR((PUCHAR)VGA_SEQ_DATA, Value);
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}
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VOID STATIC
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HalWriteAc(ULONG Index, UCHAR Value)
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{
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if (TextPaletteEnabled)
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{
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Index &= ~0x20;
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}
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else
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{
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Index |= 0x20;
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}
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(VOID)READ_PORT_UCHAR((PUCHAR)VGA_INSTAT_READ);
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WRITE_PORT_UCHAR((PUCHAR)VGA_AC_INDEX, Index);
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WRITE_PORT_UCHAR((PUCHAR)VGA_AC_WRITE, Value);
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}
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UCHAR STATIC
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HalReadAc(ULONG Index)
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{
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if (TextPaletteEnabled)
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{
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Index &= ~0x20;
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}
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else
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{
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Index |= 0x20;
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}
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(VOID)READ_PORT_UCHAR((PUCHAR)VGA_INSTAT_READ);
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WRITE_PORT_UCHAR((PUCHAR)VGA_AC_INDEX, Index);
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return(READ_PORT_UCHAR((PUCHAR)VGA_AC_READ));
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}
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VOID STATIC
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HalWriteCrtc(ULONG Index, UCHAR Value)
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{
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WRITE_PORT_UCHAR((PUCHAR)VGA_CRTC_INDEX, Index);
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WRITE_PORT_UCHAR((PUCHAR)VGA_CRTC_DATA, Value);
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}
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UCHAR STATIC
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HalReadCrtc(ULONG Index)
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{
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WRITE_PORT_UCHAR((PUCHAR)VGA_CRTC_INDEX, Index);
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return(READ_PORT_UCHAR((PUCHAR)VGA_CRTC_DATA));
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}
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VOID STATIC
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HalResetSeq(BOOL Start)
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{
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if (Start)
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{
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HalWriteSeq(0x00, 0x01);
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}
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else
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{
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HalWriteSeq(0x00, 0x03);
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}
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}
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VOID STATIC
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HalBlankScreen(BOOL On)
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{
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UCHAR Scrn;
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Scrn = HalReadSeq(0x01);
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if (On)
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{
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Scrn &= ~0x20;
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}
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else
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{
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Scrn |= 0x20;
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}
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HalResetSeq(TRUE);
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HalWriteSeq(0x01, Scrn);
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HalResetSeq(FALSE);
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}
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VOID STATIC
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HalSaveFont(VOID)
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{
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UCHAR Attr10;
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UCHAR MiscOut, Gc4, Gc5, Gc6, Seq2, Seq4;
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ULONG i;
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/* Write MISC register. */
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WRITE_PORT_UCHAR((PUCHAR)VGA_MISC_WRITE, *Registers);
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Registers++;
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/* Write SEQUENCER registers. */
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for (i = 0; i < VGA_SEQ_NUM_REGISTERS; i++)
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/* Check if we are already in graphics mode. */
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Attr10 = HalReadAc(0x10);
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if (Attr10 & 0x01)
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{
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WRITE_PORT_UCHAR((PUCHAR)VGA_SEQ_INDEX, i);
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WRITE_PORT_UCHAR((PUCHAR)VGA_SEQ_DATA, *Registers);
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Registers++;
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return;
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}
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/* Unlock CRTC registers. */
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WRITE_PORT_UCHAR((PUCHAR)VGA_CRTC_INDEX, 0x03);
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Port = READ_PORT_UCHAR((PUCHAR)VGA_CRTC_DATA);
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WRITE_PORT_UCHAR((PUCHAR)VGA_CRTC_DATA, Port | 0x80);
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WRITE_PORT_UCHAR((PUCHAR)VGA_CRTC_INDEX, 0x11);
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Port = READ_PORT_UCHAR((PUCHAR)VGA_CRTC_DATA);
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WRITE_PORT_UCHAR((PUCHAR)VGA_CRTC_DATA, Port & ~0x80);
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/* Make sure they stay unlocked. */
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Registers[0x03] |= 0x80;
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Registers[0x11] &= ~0x80;
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/* Write CRTC registers. */
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/* Save registers. */
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MiscOut = READ_PORT_UCHAR((PUCHAR)VGA_MISC_READ);
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Gc4 = HalReadGc(0x04);
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Gc5 = HalReadGc(0x05);
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Gc6 = HalReadGc(0x06);
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Seq2 = HalReadSeq(0x02);
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Seq4 = HalReadSeq(0x04);
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/* Force colour mode. */
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WRITE_PORT_UCHAR((PUCHAR)VGA_MISC_WRITE, MiscOut | 0x01);
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HalBlankScreen(FALSE);
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for (i = 0; i < 2; i++)
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{
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/* Save font 1 */
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HalWriteSeq(0x02, 0x04 << i); /* Write to plane 2 or 3 */
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HalWriteSeq(0x04, 0x06); /* Enable plane graphics. */
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HalWriteGc(0x04, 0x02 + i); /* Read plane 2 or 3 */
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HalWriteGc(0x05, 0x00); /* Write mode 0; read mode 0 */
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HalWriteGc(0x06, 0x05); /* Set graphics. */
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memcpy(SavedTextFont[i], GraphVideoBuffer, FONT_AMOUNT);
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}
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/* Restore registers. */
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HalWriteAc(0x10, Attr10);
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HalWriteSeq(0x02, Seq2);
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HalWriteSeq(0x04, Seq4);
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HalWriteGc(0x04, Gc4);
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HalWriteGc(0x05, Gc5);
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HalWriteGc(0x06, Gc6);
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WRITE_PORT_UCHAR((PUCHAR)VGA_MISC_WRITE, MiscOut);
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HalBlankScreen(TRUE);
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}
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VOID STATIC
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HalSaveMode(VOID)
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{
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ULONG i;
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SavedTextMiscOutReg = READ_PORT_UCHAR((PUCHAR)VGA_MISC_READ);
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for (i = 0; i < VGA_CRTC_NUM_REGISTERS; i++)
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{
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WRITE_PORT_UCHAR((PUCHAR)VGA_CRTC_INDEX, i);
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WRITE_PORT_UCHAR((PUCHAR)VGA_CRTC_DATA, *Registers);
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Registers++;
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SavedTextCrtcReg[i] = HalReadCrtc(i);
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}
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/* Write GC registers. */
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for (i = 0; i < VGA_GC_NUM_REGISTERS; i++)
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{
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WRITE_PORT_UCHAR((PUCHAR)VGA_GC_INDEX, i);
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WRITE_PORT_UCHAR((PUCHAR)VGA_GC_DATA, *Registers);
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Registers++;
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}
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/* Write AC registers. */
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HalEnablePalette();
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for (i = 0; i < VGA_AC_NUM_REGISTERS; i++)
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{
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(VOID)READ_PORT_UCHAR((PUCHAR)VGA_INSTAT_READ);
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WRITE_PORT_UCHAR((PUCHAR)VGA_AC_INDEX, i);
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WRITE_PORT_UCHAR((PUCHAR)VGA_AC_WRITE, *Registers);
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Registers++;
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SavedTextAcReg[i] = HalReadAc(i);
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||||
}
|
||||
/* Reset palette. */
|
||||
for (i = 0; i < 64; i++)
|
||||
HalDisablePalette();
|
||||
|
||||
for (i = 0; i < VGA_GC_NUM_REGISTERS; i++)
|
||||
{
|
||||
WRITE_PORT_UCHAR((PUCHAR)0x03c8, i);
|
||||
WRITE_PORT_UCHAR((PUCHAR)0x03c9, TextPalette[i][0]);
|
||||
WRITE_PORT_UCHAR((PUCHAR)0x03c9, TextPalette[i][1]);
|
||||
WRITE_PORT_UCHAR((PUCHAR)0x03c9, TextPalette[i][2]);
|
||||
SavedTextGcReg[i] = HalReadGc(i);
|
||||
}
|
||||
/* Lock 16-colour palette and unblank display. */
|
||||
|
||||
for (i = 0; i < VGA_SEQ_NUM_REGISTERS; i++)
|
||||
{
|
||||
SavedTextSeqReg[i] = HalReadSeq(i);
|
||||
}
|
||||
}
|
||||
|
||||
VOID STATIC
|
||||
HalDacDelay(VOID)
|
||||
{
|
||||
(VOID)READ_PORT_UCHAR((PUCHAR)VGA_INSTAT_READ);
|
||||
WRITE_PORT_UCHAR((PUCHAR)VGA_AC_INDEX, 0x20);
|
||||
(VOID)READ_PORT_UCHAR((PUCHAR)VGA_INSTAT_READ);
|
||||
}
|
||||
|
||||
VOID STATIC
|
||||
HalSavePalette(VOID)
|
||||
{
|
||||
ULONG i;
|
||||
WRITE_PORT_UCHAR((PUCHAR)VGA_DAC_MASK, 0xFF);
|
||||
WRITE_PORT_UCHAR((PUCHAR)VGA_DAC_READ_INDEX, 0x00);
|
||||
for (i = 0; i < 768; i++)
|
||||
{
|
||||
SavedTextPalette[i] = READ_PORT_UCHAR((PUCHAR)VGA_DAC_DATA);
|
||||
HalDacDelay();
|
||||
}
|
||||
}
|
||||
|
||||
VOID STATIC
|
||||
HalRestoreFont(VOID)
|
||||
{
|
||||
UCHAR MiscOut, Attr10, Gc1, Gc3, Gc4, Gc5, Gc6, Gc8;
|
||||
UCHAR Seq2, Seq4;
|
||||
ULONG i;
|
||||
|
||||
/* Save registers. */
|
||||
MiscOut = READ_PORT_UCHAR((PUCHAR)VGA_MISC_READ);
|
||||
Attr10 = HalReadAc(0x10);
|
||||
Gc1 = HalReadGc(0x01);
|
||||
Gc3 = HalReadGc(0x03);
|
||||
Gc4 = HalReadGc(0x04);
|
||||
Gc5 = HalReadGc(0x05);
|
||||
Gc6 = HalReadGc(0x06);
|
||||
Gc8 = HalReadGc(0x08);
|
||||
Seq2 = HalReadSeq(0x02);
|
||||
Seq4 = HalReadSeq(0x04);
|
||||
|
||||
/* Force into colour mode. */
|
||||
WRITE_PORT_UCHAR((PUCHAR)VGA_MISC_WRITE, MiscOut | 0x10);
|
||||
|
||||
HalBlankScreen(FALSE);
|
||||
|
||||
HalWriteGc(0x03, 0x00); /* Don't rotate; write unmodified. */
|
||||
HalWriteGc(0x08, 0xFF); /* Write all bits. */
|
||||
HalWriteGc(0x01, 0x00); /* All planes from CPU. */
|
||||
|
||||
for (i = 0; i < 2; i++)
|
||||
{
|
||||
HalWriteSeq(0x02, 0x04 << i); /* Write to plane 2 or 3 */
|
||||
HalWriteSeq(0x04, 0x06); /* Enable plane graphics. */
|
||||
HalWriteGc(0x04, 0x02 + i); /* Read plane 2 or 3 */
|
||||
HalWriteGc(0x05, 0x00); /* Write mode 0; read mode 0. */
|
||||
HalWriteGc(0x06, 0x05); /* Set graphics. */
|
||||
memcpy(GraphVideoBuffer, SavedTextFont[i], FONT_AMOUNT);
|
||||
}
|
||||
|
||||
HalBlankScreen(TRUE);
|
||||
|
||||
/* Restore registers. */
|
||||
WRITE_PORT_UCHAR((PUCHAR)VGA_MISC_WRITE, MiscOut);
|
||||
HalWriteAc(0x10, Attr10);
|
||||
HalWriteGc(0x01, Gc1);
|
||||
HalWriteGc(0x03, Gc3);
|
||||
HalWriteGc(0x04, Gc4);
|
||||
HalWriteGc(0x05, Gc5);
|
||||
HalWriteGc(0x06, Gc6);
|
||||
HalWriteGc(0x08, Gc8);
|
||||
HalWriteSeq(0x02, Seq2);
|
||||
HalWriteSeq(0x04, Seq4);
|
||||
}
|
||||
|
||||
VOID STATIC
|
||||
HalRestoreMode(VOID)
|
||||
{
|
||||
ULONG i;
|
||||
|
||||
WRITE_PORT_UCHAR((PUCHAR)VGA_MISC_WRITE, SavedTextMiscOutReg);
|
||||
|
||||
for (i = 1; i < VGA_SEQ_NUM_REGISTERS; i++)
|
||||
{
|
||||
HalWriteSeq(i, SavedTextSeqReg[i]);
|
||||
}
|
||||
|
||||
/* Unlock CRTC registers 0-7 */
|
||||
HalWriteCrtc(17, SavedTextCrtcReg[17] & ~0x80);
|
||||
|
||||
for (i = 0; i < VGA_CRTC_NUM_REGISTERS; i++)
|
||||
{
|
||||
HalWriteCrtc(i, SavedTextCrtcReg[i]);
|
||||
}
|
||||
|
||||
for (i = 0; i < VGA_GC_NUM_REGISTERS; i++)
|
||||
{
|
||||
HalWriteGc(i, SavedTextGcReg[i]);
|
||||
}
|
||||
|
||||
HalEnablePalette();
|
||||
for (i = 0; i < VGA_AC_NUM_REGISTERS; i++)
|
||||
{
|
||||
HalWriteAc(i, SavedTextAcReg[i]);
|
||||
}
|
||||
HalDisablePalette();
|
||||
}
|
||||
|
||||
VOID STATIC
|
||||
HalRestorePalette(VOID)
|
||||
{
|
||||
ULONG i;
|
||||
WRITE_PORT_UCHAR((PUCHAR)VGA_DAC_MASK, 0xFF);
|
||||
WRITE_PORT_UCHAR((PUCHAR)VGA_DAC_WRITE_INDEX, 0x00);
|
||||
for (i = 0; i < 768; i++)
|
||||
{
|
||||
WRITE_PORT_UCHAR((PUCHAR)VGA_DAC_DATA, SavedTextPalette[i]);
|
||||
HalDacDelay();
|
||||
}
|
||||
HalDisablePalette();
|
||||
}
|
||||
|
||||
/* PRIVATE FUNCTIONS ********************************************************/
|
||||
|
|
@ -382,6 +577,7 @@ HalInitializeDisplay (PLOADER_PARAMETER_BLOCK LoaderBlock)
|
|||
ULONG Data;
|
||||
|
||||
VideoBuffer = (WORD *)(0xd0000000 + 0xb8000);
|
||||
GraphVideoBuffer = (PUCHAR)(0xd0000000 + 0xa0000);
|
||||
// VideoBuffer = HalMapPhysicalMemory (0xb8000, 2);
|
||||
|
||||
/* Set cursor position */
|
||||
|
|
@ -410,6 +606,13 @@ HalInitializeDisplay (PLOADER_PARAMETER_BLOCK LoaderBlock)
|
|||
HalClearDisplay(CHAR_ATTRIBUTE_BLACK);
|
||||
|
||||
DisplayInitialized = TRUE;
|
||||
|
||||
/*
|
||||
Save the VGA state at this point so we can restore it on a bugcheck.
|
||||
*/
|
||||
HalSavePalette();
|
||||
HalSaveMode();
|
||||
HalSaveFont();
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -430,16 +633,9 @@ HalReleaseDisplayOwnership()
|
|||
|
||||
if (!HalResetDisplayParameters(SizeX, SizeY))
|
||||
{
|
||||
if (SizeX == 80 && SizeY == 25)
|
||||
{
|
||||
HalSetDisplayMode(Text80x25Registers);
|
||||
}
|
||||
else
|
||||
{
|
||||
SizeX = 80;
|
||||
SizeY = 50;
|
||||
HalSetDisplayMode(Text80x50Registers);
|
||||
}
|
||||
HalRestoreMode();
|
||||
HalRestoreFont();
|
||||
HalRestorePalette();
|
||||
}
|
||||
HalOwnsDisplay = TRUE;
|
||||
HalClearDisplay(CHAR_ATTRIBUTE);
|
||||
|
|
|
|||
Loading…
Reference in a new issue