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Diffstat (limited to 'board/MAI/bios_emulator/scitech/src/pm/tests/isvesa.c')
-rw-r--r-- | board/MAI/bios_emulator/scitech/src/pm/tests/isvesa.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/board/MAI/bios_emulator/scitech/src/pm/tests/isvesa.c b/board/MAI/bios_emulator/scitech/src/pm/tests/isvesa.c new file mode 100644 index 0000000000..9c02452bb3 --- /dev/null +++ b/board/MAI/bios_emulator/scitech/src/pm/tests/isvesa.c @@ -0,0 +1,110 @@ +/**************************************************************************** +* +* SciTech OS Portability Manager Library +* +* ======================================================================== +* +* The contents of this file are subject to the SciTech MGL Public +* License Version 1.0 (the "License"); you may not use this file +* except in compliance with the License. You may obtain a copy of +* the License at http://www.scitechsoft.com/mgl-license.txt +* +* Software distributed under the License is distributed on an +* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or +* implied. See the License for the specific language governing +* rights and limitations under the License. +* +* The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc. +* +* The Initial Developer of the Original Code is SciTech Software, Inc. +* All Rights Reserved. +* +* ======================================================================== +* +* Language: ANSI C +* Environment: any +* +* Description: Test program to check the ability to allocate real mode +* memory and to call real mode interrupt handlers such as +* the VESA VBE BIOS from protected mode. Compile and link +* with the appropriate command line for your DOS extender. +* +* Functions tested: PM_getVESABuf() +* PM_mapRealPointer() +* PM_int86x() +* +****************************************************************************/ + +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include "pmapi.h" + +/* SuperVGA information block */ + +#pragma pack(1) + +typedef struct { + char VESASignature[4]; /* 'VESA' 4 byte signature */ + short VESAVersion; /* VBE version number */ + ulong OEMStringPtr; /* Far pointer to OEM string */ + ulong Capabilities; /* Capabilities of video card */ + ulong VideoModePtr; /* Far pointer to supported modes */ + short TotalMemory; /* Number of 64kb memory blocks */ + char reserved[236]; /* Pad to 256 byte block size */ + } VgaInfoBlock; + +#pragma pack() + +int main(void) +{ + RMREGS regs; + RMSREGS sregs; + VgaInfoBlock vgaInfo; + ushort *mode; + uint vgLen; + uchar *vgPtr; + unsigned r_vgseg,r_vgoff; + + printf("Program running in "); + switch (PM_getModeType()) { + case PM_realMode: + printf("real mode.\n\n"); + break; + case PM_286: + printf("16 bit protected mode.\n\n"); + break; + case PM_386: + printf("32 bit protected mode.\n\n"); + break; + } + + /* Allocate a 256 byte block of real memory for communicating with + * the VESA BIOS. + */ + if ((vgPtr = PM_getVESABuf(&vgLen,&r_vgseg,&r_vgoff)) == NULL) { + printf("Unable to allocate VESA memory buffer!\n"); + exit(1); + } + + /* Call the VESA VBE to see if it is out there */ + regs.x.ax = 0x4F00; + regs.x.di = r_vgoff; + sregs.es = r_vgseg; + memcpy(vgPtr,"VBE2",4); + PM_int86x(0x10, ®s, ®s, &sregs); + memcpy(&vgaInfo,vgPtr,sizeof(VgaInfoBlock)); + if (regs.x.ax == 0x4F && strncmp(vgaInfo.VESASignature,"VESA",4) == 0) { + printf("VESA VBE version %d.%d BIOS detected\n\n", + vgaInfo.VESAVersion >> 8, vgaInfo.VESAVersion & 0xF); + printf("Available video modes:\n"); + mode = PM_mapRealPointer(vgaInfo.VideoModePtr >> 16, vgaInfo.VideoModePtr & 0xFFFF); + while (*mode != 0xFFFF) { + printf(" %04hXh (%08X)\n", *mode, (int)mode); + mode++; + } + } + else + printf("VESA VBE not found\n"); + return 0; +} |