DOS ain't dead - HX/OGLTEST error

HX/OGLTEST error (Users)

posted by Japheth , Germany (South), 26.05.2011, 19:26

> Ok, i did a "quickie" with DEBUG, assembling some code then using
> P command to proceed thru it and looking at the registers.
> Setting CX = 3 (video mode 3), after calling Int 10h, AX returned
> 014Fh. According to RB's interrupt list, the function is
> supported (AL = 4Fh), but it failed (AH = 01h). So there you
> have it! (Just to double check, i did the same but with CX =
> 0101h -- a standard VESA mode -- and the call succeeded: AX =
> 004Fh.)

Interesting. It's still a bit "unusual" that the program fails, because VESA32 clears the buffer at ES:DI with zeros before its int 10h, ax=4F01h call. This means, although your VESA-BIOS returns with an error code, it modifies the buffer content!?

---
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