DOS ain't dead

[testers wanted] Very Great Accelerator (DOSX)

posted by Rugxulo , Usono, 09.08.2007, 23:54

> http://www.unet.univie.ac.at/~a0503736/php/drdoswiki/uploads/Main/X.zip
>
> Please download and test
>
> ... and report EBX and ECX values and used CPU type and frequency.
> Interested in older CPU's 80386...P2 preferably.
>
> Known "criminal" bugs: - doesn't work if HDPMI32 is present
>
> EBX is split time, ECX copy time. No emulators please: tested in BOCHS and
> got garbage results: sophisticated algorithms are slowed down by factor 100
> (!!!), OTOH MOVSD seems to run at 99% of native speed
> Done in 1 s with 1 GHz, might take several min on 80386 (???)

It never finishes (at least, it doesn't do anything but sit there at the Bear / fish screen). Is it supposed to stop or is a keypress the only way to exit? When I press a key, it aborts with "Invalid Opcode Exception". Tested both Pentium 166 Mhz and 486 Sx/25 but neither "worked" (besides showing a simple pic).

What is it supposed to do? Obviously, you use DOS/32a, but is this created by CC386 or pure assembly or ...?

EDIT! (is this what you wanted??)

P166 : EBX=14 , ECX=11 ("invalid opcode fault", exception 06h)
486 : EBX=75, ECX=92 ("invalid opcode fault")

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Know your limits.h

Complete thread:

• [testers wanted] Very Great Accelerator - DOS386, 09.08.2007, 19:06 (DOSX)
  • [testers wanted] Very Great Accelerator - rr, 09.08.2007, 19:16
  • [testers wanted] Very Great Accelerator - Rugxulo, 09.08.2007, 23:54
    • [testers wanted] Very Great Accelerator | thanks to R & L - DOS386, 10.08.2007, 20:37
  • [testers wanted] Very Great Accelerator - Laaca, 10.08.2007, 18:19