DOS ain't dead - Using Dos for Real Time applications -> CLI

Using Dos for Real Time applications -> CLI (Developers)

posted by RayeR , CZ, 28.12.2012, 01:32

> Moreover, I have tested my little "loop program" on another computer,
> older. And the surprise is that this 400usec task does not happen. There is
> indeed some fluctuation, but all the loops take less that 50usec.
> To sum up, this phenomenon depends on hardware used, or maybe bios
> options...

Hehe, this is because old bios writers was the masters of assembler and did theirs work well. Now nobody cares and the most important think is profit and short time to market so why to bother with some optimizations, customer fuck you...
You can modify interrupt vector table such way you hook an interrupt vector to your dummy routine containing only IRET - this is fast as possible. You can walk vector by vector and check when the 400us delay disapper. First try timer interrupt.

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DOS gives me freedom to unlimited HW access.

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Complete thread:

Using Dos for Real Time applications - Damien, 23.12.2012, 18:41 (Developers)
- Using Dos for Real Time applications -> CLI - DOS386, 24.12.2012, 09:39
  - Using Dos for Real Time applications -> CLI - RayeR, 24.12.2012, 15:13
    - Using Dos for Real Time applications -> CLI - Damien, 26.12.2012, 12:50
    - Using Dos for Real Time applications -> CLI - Damien, 27.12.2012, 23:23
      - Using Dos for Real Time applications -> CLI - RayeR, 28.12.2012, 01:32
        Using Dos for Real Time applications -> CLI - Damien, 02.01.2013, 13:20
        Using Dos for Real Time applications -> CLI - Laaca, 02.01.2013, 21:02
        Using Dos for Real Time applications -> CLI - RayeR, 02.01.2013, 23:22
        Using Dos for Real Time applications -> CLI - Damien, 05.01.2013, 14:10
        Using Dos for Real Time applications -> CLI - RayeR, 06.01.2013, 21:43
        Using Dos for Real Time applications -> CLI - Damien, 09.01.2013, 13:12
        Using Dos for Real Time applications -> CLI - RayeR, 09.01.2013, 13:52
        Using Dos for Real Time applications -> CLI - Arjay, 09.01.2013, 23:40