board/MAI/bios_emulator/scitech/src/pm/tests/isvesa.c

   1 /****************************************************************************
   2 *
   3 *                   SciTech OS Portability Manager Library
   4 *
   5 *  ========================================================================
   6 *
   7 *    The contents of this file are subject to the SciTech MGL Public
   8 *    License Version 1.0 (the "License"); you may not use this file
   9 *    except in compliance with the License. You may obtain a copy of
  10 *    the License at http://www.scitechsoft.com/mgl-license.txt
  11 *
  12 *    Software distributed under the License is distributed on an
  13 *    "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
  14 *    implied. See the License for the specific language governing
  15 *    rights and limitations under the License.
  16 *
  17 *    The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc.
  18 *
  19 *    The Initial Developer of the Original Code is SciTech Software, Inc.
  20 *    All Rights Reserved.
  21 *
  22 *  ========================================================================
  23 *
  24 * Language:     ANSI C
  25 * Environment:  any
  26 *
  27 * Description:  Test program to check the ability to allocate real mode
  28 *               memory and to call real mode interrupt handlers such as
  29 *               the VESA VBE BIOS from protected mode. Compile and link
  30 *               with the appropriate command line for your DOS extender.
  31 *
  32 *               Functions tested:   PM_getVESABuf()
  33 *                                   PM_mapRealPointer()
  34 *                                   PM_int86x()
  35 *
  36 ****************************************************************************/
  37
  38 #include <stdlib.h>
  39 #include <stdio.h>
  40 #include <string.h>
  41 #include "pmapi.h"
  42
  43 /* SuperVGA information block */
  44
  45 #pragma pack(1)
  46
  47 typedef struct {
  48     char    VESASignature[4];       /* 'VESA' 4 byte signature          */
  49     short   VESAVersion;            /* VBE version number               */
  50     ulong   OEMStringPtr;           /* Far pointer to OEM string        */
  51     ulong   Capabilities;           /* Capabilities of video card       */
  52     ulong   VideoModePtr;           /* Far pointer to supported modes   */
  53     short   TotalMemory;            /* Number of 64kb memory blocks     */
  54     char    reserved[236];          /* Pad to 256 byte block size       */
  55     } VgaInfoBlock;
  56
  57 #pragma pack()
  58
  59 int main(void)
  60 {
  61     RMREGS          regs;
  62     RMSREGS         sregs;
  63     VgaInfoBlock    vgaInfo;
  64     ushort          *mode;
  65     uint            vgLen;
  66     uchar           *vgPtr;
  67     unsigned        r_vgseg,r_vgoff;
  68
  69     printf("Program running in ");
  70     switch (PM_getModeType()) {
  71         case PM_realMode:
  72             printf("real mode.\n\n");
  73             break;
  74         case PM_286:
  75             printf("16 bit protected mode.\n\n");
  76             break;
  77         case PM_386:
  78             printf("32 bit protected mode.\n\n");
  79             break;
  80         }
  81
  82     /* Allocate a 256 byte block of real memory for communicating with
  83      * the VESA BIOS.
  84      */
  85     if ((vgPtr = PM_getVESABuf(&vgLen,&r_vgseg,&r_vgoff)) == NULL) {
  86         printf("Unable to allocate VESA memory buffer!\n");
  87         exit(1);
  88         }
  89
  90     /* Call the VESA VBE to see if it is out there */
  91     regs.x.ax = 0x4F00;
  92     regs.x.di = r_vgoff;
  93     sregs.es = r_vgseg;
  94     memcpy(vgPtr,"VBE2",4);
  95     PM_int86x(0x10, &regs, &regs, &sregs);
  96     memcpy(&vgaInfo,vgPtr,sizeof(VgaInfoBlock));
  97     if (regs.x.ax == 0x4F && strncmp(vgaInfo.VESASignature,"VESA",4) == 0) {
  98         printf("VESA VBE version %d.%d BIOS detected\n\n",
  99             vgaInfo.VESAVersion >> 8, vgaInfo.VESAVersion & 0xF);
 100         printf("Available video modes:\n");
 101         mode = PM_mapRealPointer(vgaInfo.VideoModePtr >> 16, vgaInfo.VideoModePtr & 0xFFFF);
 102         while (*mode != 0xFFFF) {
 103             printf("    %04hXh (%08X)\n", *mode, (int)mode);
 104             mode++;
 105             }
 106         }
 107     else
 108         printf("VESA VBE not found\n");
 109     return 0;
 110 }