DOS ain't dead - HX/OGLTEST error

HX/OGLTEST error (Users)

posted by Japheth , Germany (South), 25.05.2011, 07:06

> I do know what 4F01h does though -- you set up a data buffer,
> feed the call a video-mode number, and it returns data about that
> mode in the buffer. Now, me determining if the data is
> *reasonable*, well, that's a whole 'nuther story....

I know what VESA32 does, so I might be able to help.

I guess you're calling ogltest from a text mode. OTOH, the crash dump tells me that VESA32 erroneously thinks it has access to the frame buffer.

So the test is to call vesa int 10h, ax=4F01h, current mode is TEXT (video mode 3) and then see if

- the call succeeds
- field MemoryModel (offset 1Bh in structure below) is zero.

SVGAINFO struct ModeAttributes dw ? ;+00 WinAAttributes db ? ;+02 WinBAttributes db ? ;+03 WinGranularity dw ? ;+04 WinSize dw ? ;+06 WinASegment dw ? ;+08 WinBSegment dw ? ;+0A WinFuncPtr dd ? ;+0C BytesPerScanLine dw ? ;+10 ;---------------------- rest is optional info (since Version 1.2) XResolution dw ? ;+12 YResolution dw ? ;+14 XCharSize db ? ;+16 YCharSize db ? ;+17 NumberOfPlanes db ? ;+18 BitsPerPixel db ? ;+19 NumberOfBanks db ? ;+1A MemoryModel db ? ;+1B BankSize db ? ;+1C NumberOfImagePages db ? Reserved db ? RedMaskSize db ? RedFieldPosition db ? GreenMaskSize db ? GreenFieldPosition db ? BlueMaskSize db ? BlueFieldPosition db ? RsvdMaskSize db ? RsvdFieldPosition db ? DirectColorModeInfo db ? PhysBasePtr dd ? ;since Version 2.0 OffScreenMemOffset dd ? OffScreenMemSize dw ? Reserved2 db 206 dup (?) SVGAINFO ends

I also added a missing check in VESA32. When trying to save the vesa state, it always assumed that int 10h, ax=4f01h succeeded (it perhaps might fail for standard VGA text modes on your system).

EDIT: I uploaded a new HXRT217.zip which contains the modified VESA32.DLL.

---
MS-DOS forever!

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Complete thread:

HX/OGLTEST error - Doug, 19.05.2011, 18:37 (Users)
- HX/OGLTEST error - Rugxulo, 19.05.2011, 22:34
  - HX/OGLTEST error - RayeR, 20.05.2011, 01:11
    - HX/OGLTEST error - Doug, 20.05.2011, 06:31
- HX/OGLTEST error - Japheth, 20.05.2011, 06:35
  - HX/OGLTEST error - Doug, 23.05.2011, 07:54
    - HX/OGLTEST error - Japheth, 23.05.2011, 09:25
    - HX/OGLTEST error - RayeR, 23.05.2011, 19:10
      - HX/OGLTEST error - Doug, 24.05.2011, 18:55
        HX/OGLTEST error - RayeR, 25.05.2011, 00:04
        HX/OGLTEST error - Doug, 25.05.2011, 17:42
        HX/OGLTEST error - RayeR, 26.05.2011, 00:48
        HX/OGLTEST error - Japheth, 25.05.2011, 07:06
        HX/OGLTEST error - Doug, 26.05.2011, 08:01
        HX/OGLTEST error - Japheth, 26.05.2011, 19:26
        HX/OGLTEST error - RayeR, 26.05.2011, 21:35
        HX/OGLTEST error - Doug, 26.05.2011, 22:40
        HX/OGLTEST error - Japheth, 27.05.2011, 07:05
        HX/OGLTEST error - Doug, 28.05.2011, 00:51
        copying buffer contents to protected mode - ecm, 28.05.2011, 01:09
        HX/OGLTEST error - Japheth, 28.05.2011, 08:31