3 * Copyright (C) 1998-2003 Brian Palmer <brianp@sginet.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 UCHAR Signature
[4]; // (ret) signature ("VESA")
29 // (call) VESA 2.0 request signature ("VBE2"), required to receive
31 USHORT VesaVersion
; // VESA version number (one-digit minor version -- 0102h = v1.2)
32 ULONG OemNamePtr
; // pointer to OEM name
33 // "761295520" for ATI
34 ULONG Capabilities
; // capabilities flags (see #00078)
35 ULONG SupportedModeListPtr
; // pointer to list of supported VESA and OEM video modes
36 // (list of words terminated with FFFFh)
37 USHORT TotalVideoMemory
; // total amount of video memory in 64K blocks
40 //UCHAR Reserved[236];
43 USHORT OemSoftwareVersion
; // OEM software version (BCD, high byte = major, low byte = minor)
44 ULONG VendorNamePtr
; // pointer to vendor name
45 ULONG ProductNamePtr
; // pointer to product name
46 ULONG ProductRevisionStringPtr
; // pointer to product revision string
47 USHORT VBE_AF_Version
; // (if capabilities bit 3 set) VBE/AF version (BCD)
49 ULONG AcceleratedModeListPtr
; // (if capabilities bit 3 set) pointer to list of supported
50 // accelerated video modes (list of words terminated with FFFFh)
51 UCHAR Reserved
[216]; // reserved for VBE implementation
52 UCHAR ScratchPad
[256]; // OEM scratchpad (for OEM strings, etc.)
53 } VESA_SVGA_INFO
, *PVESA_SVGA_INFO
;
56 // Bitfields for VESA capabilities:
58 // Bit(s) Description (Table 00078)
59 // 0 DAC can be switched into 8-bit mode
60 // 1 non-VGA controller
61 // 2 programmed DAC with blank bit (i.e. only during blanking interval)
62 // 3 (VBE v3.0) controller supports hardware stereoscopic signalling
63 // 3 controller supports VBE/AF v1.0P extensions
64 // 4 (VBE v3.0) if bit 3 set:
65 // =0 stereo signalling via external VESA stereo connector
66 // =1 stereo signalling via VESA EVC connector
67 // 4 (VBE/AF v1.0P) must call EnableDirectAccess to access framebuffer
68 // 5 (VBE/AF v1.0P) controller supports hardware mouse cursor
69 // 6 (VBE/AF v1.0P) controller supports hardware clipping
70 // 7 (VBE/AF v1.0P) controller supports transparent BitBLT
73 // Notes: The list of supported video modes is stored in the reserved
74 // portion of the SuperVGA information record by some implementations,
75 // and it may thus be necessary to either copy the mode list or use a
76 // different buffer for all subsequent VESA calls. Not all of the video
77 // modes in the list of mode numbers may be supported, e.g. if they require
78 // more memory than currently installed or are not supported by the
79 // attached monitor. Check any mode you intend to use through AX=4F01h first..
80 // The 1.1 VESA document specifies 242 reserved bytes at the end, so the
81 // buffer should be 262 bytes to ensure that it is not overrun; for v2.0,
82 // the buffer should be 512 bytes. The S3 specific video modes will most
83 // likely follow the FFFFh terminator at the end of the standard modes.
84 // A search must then be made to find them, FFFFh will also terminate this
85 // second list. In some cases, only a "stub" VBE may be present, supporting
86 // only AX=4F00h; this case may be assumed if the list of supported video modes
87 // is empty (consisting of a single word of FFFFh)
89 static VOID
BiosSetVideoFont8x16(VOID
)
94 // VIDEO - TEXT-MODE CHARGEN - LOAD ROM 8x16 CHARACTER SET (VGA)
102 Int386(0x10, &Regs
, &Regs
);
105 static VOID
VideoSetTextCursorPosition(ULONG X
, ULONG Y
)
109 static ULONG
VideoGetTextCursorPositionX(VOID
)
114 // VIDEO - GET CURSOR POSITION AND SIZE
120 // 0 in graphics modes
122 // AX = 0000h (Phoenix BIOS)
123 // CH = start scan line
124 // CL = end scan line
125 // DH = row (00h is top)
126 // DL = column (00h is left)
129 Int386(0x10, &Regs
, &Regs
);
134 static ULONG
VideoGetTextCursorPositionY(VOID
)
139 // VIDEO - GET CURSOR POSITION AND SIZE
145 // 0 in graphics modes
147 // AX = 0000h (Phoenix BIOS)
148 // CH = start scan line
149 // CL = end scan line
150 // DH = row (00h is top)
151 // DL = column (00h is left)
154 Int386(0x10, &Regs
, &Regs
);
160 USHORT
BiosIsVesaSupported(VOID
)
163 PVESA_SVGA_INFO SvgaInfo
= (PVESA_SVGA_INFO
)BIOSCALLBUFFER
;
164 //USHORT* VideoModes;
167 DPRINTM(DPRINT_UI
, "BiosIsVesaSupported()\n");
169 RtlZeroMemory(SvgaInfo
, sizeof(VESA_SVGA_INFO
));
171 // Make sure we receive version 2.0 info
172 SvgaInfo
->Signature
[0] = 'V';
173 SvgaInfo
->Signature
[1] = 'B';
174 SvgaInfo
->Signature
[2] = 'E';
175 SvgaInfo
->Signature
[3] = '2';
178 // VESA SuperVGA BIOS (VBE) - GET SuperVGA INFORMATION
181 // ES:DI -> buffer for SuperVGA information (see #00077)
183 // AL = 4Fh if function supported
186 // ES:DI buffer filled
189 // 02h function not supported by current hardware configuration
190 // 03h function invalid in current video mode
192 // Determine whether VESA BIOS extensions are present and the
193 // capabilities supported by the display adapter
195 // Installation check;VESA SuperVGA
197 Regs
.w
.es
= BIOSCALLBUFSEGMENT
;
198 Regs
.w
.di
= BIOSCALLBUFOFFSET
;
199 Int386(0x10, &Regs
, &Regs
);
201 DPRINTM(DPRINT_UI
, "AL = 0x%x\n", Regs
.b
.al
);
202 DPRINTM(DPRINT_UI
, "AH = 0x%x\n", Regs
.b
.ah
);
204 if (Regs
.w
.ax
!= 0x004F)
206 DPRINTM(DPRINT_UI
, "Failed.\n");
210 DPRINTM(DPRINT_UI
, "Supported.\n");
211 DPRINTM(DPRINT_UI
, "SvgaInfo->Signature[4] = %c%c%c%c\n", SvgaInfo
->Signature
[0], SvgaInfo
->Signature
[1], SvgaInfo
->Signature
[2], SvgaInfo
->Signature
[3]);
212 DPRINTM(DPRINT_UI
, "SvgaInfo->VesaVersion = v%d.%d\n", ((SvgaInfo
->VesaVersion
>> 8) & 0xFF), (SvgaInfo
->VesaVersion
& 0xFF));
213 DPRINTM(DPRINT_UI
, "SvgaInfo->OemNamePtr = 0x%x\n", SvgaInfo
->OemNamePtr
);
214 DPRINTM(DPRINT_UI
, "SvgaInfo->Capabilities = 0x%x\n", SvgaInfo
->Capabilities
);
215 DPRINTM(DPRINT_UI
, "SvgaInfo->VideoMemory = %dK\n", SvgaInfo
->TotalVideoMemory
* 64);
216 DPRINTM(DPRINT_UI
, "---VBE v2.0 ---\n");
217 DPRINTM(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));
218 DPRINTM(DPRINT_UI
, "SvgaInfo->VendorNamePtr = 0x%x\n", SvgaInfo
->VendorNamePtr
);
219 DPRINTM(DPRINT_UI
, "SvgaInfo->ProductNamePtr = 0x%x\n", SvgaInfo
->ProductNamePtr
);
220 DPRINTM(DPRINT_UI
, "SvgaInfo->ProductRevisionStringPtr = 0x%x\n", SvgaInfo
->ProductRevisionStringPtr
);
221 DPRINTM(DPRINT_UI
, "SvgaInfo->VBE/AF Version = 0x%x (BCD WORD)\n", SvgaInfo
->VBE_AF_Version
);
223 //DPRINTM(DPRINT_UI, "\nSupported VESA and OEM video modes:\n");
224 //VideoModes = (USHORT*)SvgaInfo->SupportedModeListPtr;
225 //for (Index=0; VideoModes[Index]!=0xFFFF; Index++)
227 // DPRINTM(DPRINT_UI, "Mode %d: 0x%x\n", Index, VideoModes[Index]);
230 //if (SvgaInfo->VesaVersion >= 0x0200)
232 // DPRINTM(DPRINT_UI, "\nSupported accelerated video modes (VESA v2.0):\n");
233 // VideoModes = (USHORT*)SvgaInfo->AcceleratedModeListPtr;
234 // for (Index=0; VideoModes[Index]!=0xFFFF; Index++)
236 // DPRINTM(DPRINT_UI, "Mode %d: 0x%x\n", Index, VideoModes[Index]);
240 return SvgaInfo
->VesaVersion
;