ReactOS 0.4.15-dev-7677-g8209aa5
pcvesa.c File Reference
#include <freeldr.h>
#include <debug.h>
#include <pshpack2.h>
#include <poppack.h>
Include dependency graph for pcvesa.c:

Go to the source code of this file.

Classes

struct  VESA_SVGA_INFO
 

Typedefs

typedef struct VESA_SVGA_INFOPVESA_SVGA_INFO
 

Functions

 DBG_DEFAULT_CHANNEL (HWDETECT)
 
USHORT BiosIsVesaSupported (VOID)
 
BOOLEAN BiosIsVesaDdcSupported (VOID)
 
BOOLEAN BiosVesaReadEdid (VOID)
 

Typedef Documentation

◆ PVESA_SVGA_INFO

Function Documentation

◆ BiosIsVesaDdcSupported()

BOOLEAN BiosIsVesaDdcSupported ( VOID  )

Definition at line 242 of file pcvesa.c.

243{
244 REGS Regs;
245
246 TRACE("BiosIsVesaDdcSupported()\n");
247
248 Regs.w.ax = 0x4F15;
249 Regs.b.bl = 0;
250 Regs.w.cx = 0;
251 Regs.w.es = 0;
252 Regs.w.di = 0;
253 Int386(0x10, &Regs, &Regs);
254
255 TRACE("AL = 0x%x\n", Regs.b.al);
256 TRACE("AH = 0x%x\n", Regs.b.ah);
257
258 TRACE("BL = 0x%x\n", Regs.b.bl);
259
260 if (Regs.w.ax != 0x004F)
261 {
262 WARN("VBE/DDC Installation check function not supported (AL=0x%x) or failed (AH=0x%x)\n",
263 Regs.b.al, Regs.b.ah);
264 return FALSE;
265 }
266
267 return (Regs.b.ah == 0);
268}
#define WARN(fmt,...)
Definition: debug.h:112
#define FALSE
Definition: types.h:117
int __cdecl Int386(int ivec, REGS *in, REGS *out)
#define TRACE(s)
Definition: solgame.cpp:4
unsigned char bl
Definition: pcbios.h:134
unsigned char al
Definition: pcbios.h:131
unsigned char ah
Definition: pcbios.h:132
unsigned short es
Definition: pcbios.h:121
unsigned short di
Definition: pcbios.h:117
unsigned short cx
Definition: pcbios.h:113
unsigned short ax
Definition: pcbios.h:111
Definition: pcbios.h:159
BYTEREGS b
Definition: pcbios.h:163
WORDREGS w
Definition: pcbios.h:162

Referenced by DetectDisplayController().

◆ BiosIsVesaSupported()

USHORT BiosIsVesaSupported ( VOID  )

Definition at line 160 of file pcvesa.c.

161{
162 REGS Regs;
164 //USHORT* VideoModes;
165 //USHORT Index;
166
167 TRACE("BiosIsVesaSupported()\n");
168
169 RtlZeroMemory(SvgaInfo, sizeof(VESA_SVGA_INFO));
170
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';
176
177 // Int 10h AX=4F00h
178 // VESA SuperVGA BIOS (VBE) - GET SuperVGA INFORMATION
179 //
180 // AX = 4F00h
181 // ES:DI -> buffer for SuperVGA information (see #00077)
182 // Return:
183 // AL = 4Fh if function supported
184 // AH = status
185 // 00h successful
186 // ES:DI buffer filled
187 // 01h failed
188 // ---VBE v2.0---
189 // 02h function not supported by current hardware configuration
190 // 03h function invalid in current video mode
191 //
192 // Determine whether VESA BIOS extensions are present and the
193 // capabilities supported by the display adapter
194 //
195 // Installation check;VESA SuperVGA
196 Regs.w.ax = 0x4F00;
197 Regs.w.es = BIOSCALLBUFSEGMENT;
198 Regs.w.di = BIOSCALLBUFOFFSET;
199 Int386(0x10, &Regs, &Regs);
200
201 TRACE("AL = 0x%x\n", Regs.b.al);
202 TRACE("AH = 0x%x\n", Regs.b.ah);
203
204 if (Regs.w.ax != 0x004F)
205 {
206 WARN("VBE Get SuperVGA information function not supported (AL=0x%x) or failed (AH=0x%x)\n",
207 Regs.b.al, Regs.b.ah);
208 return 0x0000;
209 }
210
211 TRACE("Supported.\n");
212 TRACE("SvgaInfo->Signature[4] = %c%c%c%c\n", SvgaInfo->Signature[0], SvgaInfo->Signature[1], SvgaInfo->Signature[2], SvgaInfo->Signature[3]);
213 TRACE("SvgaInfo->VesaVersion = v%d.%d\n", ((SvgaInfo->VesaVersion >> 8) & 0xFF), (SvgaInfo->VesaVersion & 0xFF));
214 TRACE("SvgaInfo->OemNamePtr = 0x%x\n", SvgaInfo->OemNamePtr);
215 TRACE("SvgaInfo->Capabilities = 0x%x\n", SvgaInfo->Capabilities);
216 TRACE("SvgaInfo->VideoMemory = %dK\n", SvgaInfo->TotalVideoMemory * 64);
217 TRACE("---VBE v2.0 ---\n");
218 TRACE("SvgaInfo->OemSoftwareVersion = v%d.%d\n", ((SvgaInfo->OemSoftwareVersion >> 8) & 0x0F) + (((SvgaInfo->OemSoftwareVersion >> 12) & 0x0F) * 10), (SvgaInfo->OemSoftwareVersion & 0x0F) + (((SvgaInfo->OemSoftwareVersion >> 4) & 0x0F) * 10));
219 TRACE("SvgaInfo->VendorNamePtr = 0x%x\n", SvgaInfo->VendorNamePtr);
220 TRACE("SvgaInfo->ProductNamePtr = 0x%x\n", SvgaInfo->ProductNamePtr);
221 TRACE("SvgaInfo->ProductRevisionStringPtr = 0x%x\n", SvgaInfo->ProductRevisionStringPtr);
222 TRACE("SvgaInfo->VBE/AF Version = 0x%x (BCD WORD)\n", SvgaInfo->VBE_AF_Version);
223
224 if (SvgaInfo->Signature[0] != 'V' ||
225 SvgaInfo->Signature[1] != 'E' ||
226 SvgaInfo->Signature[2] != 'S' ||
227 SvgaInfo->Signature[3] != 'A')
228 {
229 ERR("Bad signature in VESA information (%c%c%c%c)\n",
230 SvgaInfo->Signature[0],
231 SvgaInfo->Signature[1],
232 SvgaInfo->Signature[2],
233 SvgaInfo->Signature[3]);
234 return 0x0000;
235 }
236
237 return SvgaInfo->VesaVersion;
238}
#define ERR(fmt,...)
Definition: debug.h:110
struct VESA_SVGA_INFO * PVESA_SVGA_INFO
UCHAR Signature[4]
Definition: pcvesa.c:28
USHORT VesaVersion
Definition: pcvesa.c:31
USHORT TotalVideoMemory
Definition: pcvesa.c:37
ULONG ProductNamePtr
Definition: pcvesa.c:45
ULONG VendorNamePtr
Definition: pcvesa.c:44
ULONG Capabilities
Definition: pcvesa.c:34
USHORT OemSoftwareVersion
Definition: pcvesa.c:43
ULONG OemNamePtr
Definition: pcvesa.c:32
ULONG ProductRevisionStringPtr
Definition: pcvesa.c:46
USHORT VBE_AF_Version
Definition: pcvesa.c:47
#define RtlZeroMemory(Destination, Length)
Definition: typedefs.h:262
#define BIOSCALLBUFSEGMENT
Definition: x86common.h:21
#define BIOSCALLBUFOFFSET
Definition: x86common.h:22
#define BIOSCALLBUFFER
Definition: x86common.h:12

Referenced by DetectDisplayController().

◆ BiosVesaReadEdid()

BOOLEAN BiosVesaReadEdid ( VOID  )

Definition at line 272 of file pcvesa.c.

273{
274 REGS Regs;
275
276 TRACE("BiosVesaReadEdid()\n");
277
279
280 Regs.w.ax = 0x4F15;
281 Regs.b.bl = 1;
282 Regs.w.cx = 0;
283 Regs.w.dx = 0;
284 Regs.w.es = BIOSCALLBUFSEGMENT;
285 Regs.w.di = BIOSCALLBUFOFFSET;
286 Int386(0x10, &Regs, &Regs);
287
288 TRACE("AL = 0x%x\n", Regs.b.al);
289 TRACE("AH = 0x%x\n", Regs.b.ah);
290
291 if (Regs.w.ax != 0x004F)
292 {
293 WARN("VBE/DDC Read EDID function not supported (AL=0x%x) or failed (AH=0x%x)\n",
294 Regs.b.al, Regs.b.ah);
295 return FALSE;
296 }
297
298 return (Regs.b.ah == 0);
299}
unsigned short dx
Definition: pcbios.h:114

Referenced by DetectDisplayController().

◆ DBG_DEFAULT_CHANNEL()

DBG_DEFAULT_CHANNEL ( HWDETECT  )