3 * Copyright (C) 1998-2003 Brian Palmer <brianp@sginet.com>
4 * Portions from Linux video.S - Display adapter & video mode setup, version 2.13 (14-May-99)
5 * Copyright (C) 1995 -- 1999 Martin Mares <mj@ucw.cz>
6 * Based on the original setup.S code (C) Linus Torvalds and Mats Anderson
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
33 UCHAR Signature
[4]; // (ret) signature ("VESA")
34 // (call) VESA 2.0 request signature ("VBE2"), required to receive
36 USHORT VesaVersion
; // VESA version number (one-digit minor version -- 0102h = v1.2)
37 ULONG OemNamePtr
; // pointer to OEM name
38 // "761295520" for ATI
39 ULONG Capabilities
; // capabilities flags (see #00078)
40 ULONG SupportedModeListPtr
; // pointer to list of supported VESA and OEM video modes
41 // (list of words terminated with FFFFh)
42 USHORT TotalVideoMemory
; // total amount of video memory in 64K blocks
45 //UCHAR Reserved[236];
48 USHORT OemSoftwareVersion
; // OEM software version (BCD, high byte = major, low byte = minor)
49 ULONG VendorNamePtr
; // pointer to vendor name
50 ULONG ProductNamePtr
; // pointer to product name
51 ULONG ProductRevisionStringPtr
; // pointer to product revision string
52 USHORT VBE_AF_Version
; // (if capabilities bit 3 set) VBE/AF version (BCD)
54 ULONG AcceleratedModeListPtr
; // (if capabilities bit 3 set) pointer to list of supported
55 // accelerated video modes (list of words terminated with FFFFh)
56 UCHAR Reserved
[216]; // reserved for VBE implementation
57 UCHAR ScratchPad
[256]; // OEM scratchpad (for OEM strings, etc.)
58 } PACKED VESA_SVGA_INFO
, *PVESA_SVGA_INFO
;
60 // Bitfields for VESA capabilities:
62 // Bit(s) Description (Table 00078)
63 // 0 DAC can be switched into 8-bit mode
64 // 1 non-VGA controller
65 // 2 programmed DAC with blank bit (i.e. only during blanking interval)
66 // 3 (VBE v3.0) controller supports hardware stereoscopic signalling
67 // 3 controller supports VBE/AF v1.0P extensions
68 // 4 (VBE v3.0) if bit 3 set:
69 // =0 stereo signalling via external VESA stereo connector
70 // =1 stereo signalling via VESA EVC connector
71 // 4 (VBE/AF v1.0P) must call EnableDirectAccess to access framebuffer
72 // 5 (VBE/AF v1.0P) controller supports hardware mouse cursor
73 // 6 (VBE/AF v1.0P) controller supports hardware clipping
74 // 7 (VBE/AF v1.0P) controller supports transparent BitBLT
77 // Notes: The list of supported video modes is stored in the reserved
78 // portion of the SuperVGA information record by some implementations,
79 // and it may thus be necessary to either copy the mode list or use a
80 // different buffer for all subsequent VESA calls. Not all of the video
81 // modes in the list of mode numbers may be supported, e.g. if they require
82 // more memory than currently installed or are not supported by the
83 // attached monitor. Check any mode you intend to use through AX=4F01h first..
84 // The 1.1 VESA document specifies 242 reserved bytes at the end, so the
85 // buffer should be 262 bytes to ensure that it is not overrun; for v2.0,
86 // the buffer should be 512 bytes. The S3 specific video modes will most
87 // likely follow the FFFFh terminator at the end of the standard modes.
88 // A search must then be made to find them, FFFFh will also terminate this
89 // second list. In some cases, only a "stub" VBE may be present, supporting
90 // only AX=4F00h; this case may be assumed if the list of supported video modes
91 // is empty (consisting of a single word of FFFFh)
93 VOID
BiosSetVideoFont8x16(VOID
)
98 // VIDEO - TEXT-MODE CHARGEN - LOAD ROM 8x16 CHARACTER SET (VGA)
101 // BL = block to load
106 Int386(0x10, &Regs
, &Regs
);
109 VOID
VideoSetTextCursorPosition(ULONG X
, ULONG Y
)
113 ULONG
VideoGetTextCursorPositionX(VOID
)
118 // VIDEO - GET CURSOR POSITION AND SIZE
124 // 0 in graphics modes
126 // AX = 0000h (Phoenix BIOS)
127 // CH = start scan line
128 // CL = end scan line
129 // DH = row (00h is top)
130 // DL = column (00h is left)
133 Int386(0x10, &Regs
, &Regs
);
138 ULONG
VideoGetTextCursorPositionY(VOID
)
143 // VIDEO - GET CURSOR POSITION AND SIZE
149 // 0 in graphics modes
151 // AX = 0000h (Phoenix BIOS)
152 // CH = start scan line
153 // CL = end scan line
154 // DH = row (00h is top)
155 // DL = column (00h is left)
158 Int386(0x10, &Regs
, &Regs
);
163 USHORT
BiosIsVesaSupported(VOID
)
166 PVESA_SVGA_INFO SvgaInfo
= (PVESA_SVGA_INFO
)BIOSCALLBUFFER
;
168 //USHORT* VideoModes;
170 #endif // defined DEBUG
172 DbgPrint((DPRINT_UI
, "BiosIsVesaSupported()\n"));
174 RtlZeroMemory(SvgaInfo
, sizeof(VESA_SVGA_INFO
));
176 // Make sure we receive version 2.0 info
177 SvgaInfo
->Signature
[0] = 'V';
178 SvgaInfo
->Signature
[1] = 'B';
179 SvgaInfo
->Signature
[2] = 'E';
180 SvgaInfo
->Signature
[3] = '2';
183 // VESA SuperVGA BIOS (VBE) - GET SuperVGA INFORMATION
186 // ES:DI -> buffer for SuperVGA information (see #00077)
188 // AL = 4Fh if function supported
191 // ES:DI buffer filled
194 // 02h function not supported by current hardware configuration
195 // 03h function invalid in current video mode
197 // Determine whether VESA BIOS extensions are present and the
198 // capabilities supported by the display adapter
200 // Installation check;VESA SuperVGA
202 Regs
.w
.es
= BIOSCALLBUFSEGMENT
;
203 Regs
.w
.di
= BIOSCALLBUFOFFSET
;
204 Int386(0x10, &Regs
, &Regs
);
206 DbgPrint((DPRINT_UI
, "AL = 0x%x\n", Regs
.b
.al
));
207 DbgPrint((DPRINT_UI
, "AH = 0x%x\n", Regs
.b
.ah
));
209 if (Regs
.w
.ax
!= 0x004F)
211 DbgPrint((DPRINT_UI
, "Failed.\n"));
216 DbgPrint((DPRINT_UI
, "Supported.\n"));
217 DbgPrint((DPRINT_UI
, "SvgaInfo->Signature[4] = %c%c%c%c\n", SvgaInfo
->Signature
[0], SvgaInfo
->Signature
[1], SvgaInfo
->Signature
[2], SvgaInfo
->Signature
[3]));
218 DbgPrint((DPRINT_UI
, "SvgaInfo->VesaVersion = v%d.%d\n", ((SvgaInfo
->VesaVersion
>> 8) & 0xFF), (SvgaInfo
->VesaVersion
& 0xFF)));
219 DbgPrint((DPRINT_UI
, "SvgaInfo->OemNamePtr = 0x%x\n", SvgaInfo
->OemNamePtr
));
220 DbgPrint((DPRINT_UI
, "SvgaInfo->Capabilities = 0x%x\n", SvgaInfo
->Capabilities
));
221 DbgPrint((DPRINT_UI
, "SvgaInfo->VideoMemory = %dK\n", SvgaInfo
->TotalVideoMemory
* 64));
222 DbgPrint((DPRINT_UI
, "---VBE v2.0 ---\n"));
223 DbgPrint((DPRINT_UI
, "SvgaInfo->OemSoftwareVersion = v%d.%d\n", ((SvgaInfo
->OemSoftwareVersion
>> 8) & 0x0F) + (((SvgaInfo
->OemSoftwareVersion
>> 12) & 0x0F) * 10), (SvgaInfo
->OemSoftwareVersion
& 0x0F) + (((SvgaInfo
->OemSoftwareVersion
>> 4) & 0x0F) * 10)));
224 DbgPrint((DPRINT_UI
, "SvgaInfo->VendorNamePtr = 0x%x\n", SvgaInfo
->VendorNamePtr
));
225 DbgPrint((DPRINT_UI
, "SvgaInfo->ProductNamePtr = 0x%x\n", SvgaInfo
->ProductNamePtr
));
226 DbgPrint((DPRINT_UI
, "SvgaInfo->ProductRevisionStringPtr = 0x%x\n", SvgaInfo
->ProductRevisionStringPtr
));
227 DbgPrint((DPRINT_UI
, "SvgaInfo->VBE/AF Version = 0x%x (BCD WORD)\n", SvgaInfo
->VBE_AF_Version
));
229 //DbgPrint((DPRINT_UI, "\nSupported VESA and OEM video modes:\n"));
230 //VideoModes = (USHORT*)SvgaInfo->SupportedModeListPtr;
231 //for (Index=0; VideoModes[Index]!=0xFFFF; Index++)
233 // DbgPrint((DPRINT_UI, "Mode %d: 0x%x\n", Index, VideoModes[Index]));
236 //if (SvgaInfo->VesaVersion >= 0x0200)
238 // DbgPrint((DPRINT_UI, "\nSupported accelerated video modes (VESA v2.0):\n"));
239 // VideoModes = (USHORT*)SvgaInfo->AcceleratedModeListPtr;
240 // for (Index=0; VideoModes[Index]!=0xFFFF; Index++)
242 // DbgPrint((DPRINT_UI, "Mode %d: 0x%x\n", Index, VideoModes[Index]));
246 DbgPrint((DPRINT_UI
, "\n"));
248 #endif // defined DEBUG
250 return SvgaInfo
->VesaVersion
;