DOS ain't dead - Incredibly slow MMX?

Incredibly slow MMX? (Developers)

posted by Rugxulo , Usono, 04.03.2009, 23:50

> > MTRR enabled? Aligned properly? Double buffered?
>
> Yes, MTRR is enabled. What do you meen by double buffering? In my test
> routine I drew into RAM (without any later copying into screen) or into
> visible part of VRAM.

double buffering (Wikipedia)

> It is aligned because VRAM is aligned always and Freepascal alignes all
> arrays or buffers on 16 bytes.

I meant the code should probably be aligned, but then again, I kinda doubt your Athlon is as sensitive as some older cpus, so that may not make much of a difference.

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Complete thread:

Incredibly slow MMX? - Laaca, 02.03.2009, 21:15 (Developers)
- Incredibly slow MMX? - Rugxulo, 04.03.2009, 03:01
  - Incredibly slow MMX? - Laaca, 04.03.2009, 13:26
    - Incredibly slow MMX? - Rugxulo, 04.03.2009, 23:50
- Incredibly slow MMX? - Japheth, 04.03.2009, 17:55
  - Incredibly slow MMX? - Laaca, 08.03.2009, 22:04
    - Incredibly slow MMX? - Rugxulo, 09.03.2009, 00:33
    - Incredibly slow MMX? - mht, 21.03.2009, 12:57
- Incredibly slow MMX? - DOS386, 22.03.2009, 06:11