DOS ain't dead - Using Multiple CPU Cores in DOS?

Using Multiple CPU Cores in DOS? (Miscellaneous)

posted by DOS386, 13.09.2011, 07:11
(edited by DOS386 on 13.09.2011, 07:23)

> why not have one CPU/Core running in RM/V86 and another running in PM

IIRC the problem we discussed 2 years ago was that you were using INT $15 / $87 incorrectly, resulting in a 16-Byte's limit instead of 64 KiB, plus redundant mapping code. This problem is not fixed in the latest version 2010-Jan-30.

Above in many posts I see many ideas (use multiple cores, use some special DPMI host, use DPMS, use virtualization) ... but sorry I don't like any of them. Why? Because they just introduce unnecessary requirements. One day we could see:

> Great USB DOS driver by Bret
> Supports UHCI OHCI EHCI XHCI
> needs virtualization capable CPU with a least 2 cores otherwise only UHCI will work

So my suggestions:

* Try to reduce the number of mode switches
* Get it working now, get it working fast later

PS: mode switches are inherently evil ... see RayeR's DGJPP issues or FreeBASIC graphics issues :-(

PPSS: Georg's DOSUSB can be pretty fast with EHCI ... unfortunately there are stability issues, probably related also to interrupt hazards and mode switches :-(

> just saying, doing everything in pure DOS is infeasible

So the final DEATH of DOS ~~ain't dead~~ is imminent ???

You don't have any alternative BTW (I don't need several 10 GiB of Loonix/Win8/VirtualBloat/OSama2/... crap).

PS: A HACK :

* switch to PM (quasi permanently)
* implement USB driver + HD driver + FAT(crap) + file manager
* copying occurs in PM only
* when done, fix BIOS clock and return to RM and DOS

This is not a driver, but allows to use USB storage devices from DOS.

---
This is a LOGITECH mouse driver, but some software expect here
the following string:*** This is Copyright 1983 Microsoft ***

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Complete thread:

Using Multiple CPU Cores in DOS? - bretjohn, 12.09.2011, 02:15 (Miscellaneous)
- Using Multiple CPU Cores in DOS? - RayeR, 12.09.2011, 15:26
  - Using Multiple CPU Cores in DOS? - Laaca, 12.09.2011, 17:26
    - Using Multiple CPU Cores in DOS? - RayeR, 12.09.2011, 20:13
    - Using Multiple CPU Cores in DOS? - bretjohn, 12.09.2011, 22:36
      - Using Multiple CPU Cores in DOS? - RayeR, 13.09.2011, 00:33
        Using Multiple CPU Cores in DOS? - bretjohn, 13.09.2011, 04:25
        Using Multiple CPU Cores in DOS? - RayeR, 13.09.2011, 19:32
        Using Multiple CPU Cores in DOS? - Laaca, 13.09.2011, 21:12
        Using Multiple CPU Cores in DOS? - bretjohn, 13.09.2011, 23:02
        Using Multiple CPU Cores in DOS? - RayeR, 14.09.2011, 03:30
        Using Multiple CPU Cores in DOS? - bretjohn, 14.09.2011, 18:24
        Using Multiple CPU Cores in DOS? - RayeR, 15.09.2011, 01:15
        Using Multiple CPU Cores in DOS? - bretjohn, 15.09.2011, 19:11
      - Using Multiple CPU Cores in DOS? - Rugxulo, 13.09.2011, 02:27
        Using Multiple CPU Cores in DOS? - RayeR, 14.09.2011, 03:52
      - Using Multiple CPU Cores in DOS? - tom, 14.09.2011, 13:24
        Using Multiple CPU Cores in DOS? - bretjohn, 14.09.2011, 19:03
        Using Multiple CPU Cores in DOS? - tom, 15.09.2011, 14:43
        Using Multiple CPU Cores in DOS? - bretjohn, 15.09.2011, 18:24
        Using Multiple CPU Cores in DOS? - tom, 15.09.2011, 18:40
        Using Multiple CPU Cores in DOS? - bretjohn, 16.09.2011, 01:33
        Using Multiple CPU Cores in DOS? - RayeR, 16.09.2011, 02:26
        Using Multiple CPU Cores in DOS? - bretjohn, 16.09.2011, 18:06
        Using Multiple CPU Cores in DOS? - RayeR, 16.09.2011, 18:22
        Using Multiple CPU Cores in DOS? - bretjohn, 17.09.2011, 02:03
        Using Multiple CPU Cores in DOS? - Laaca, 17.09.2011, 07:47
        Using Multiple CPU Cores in DOS? - tom, 17.09.2011, 14:09
        Using Multiple CPU Cores in DOS? - bretjohn, 18.09.2011, 04:27
        Using Multiple CPU Cores in DOS? - tom, 19.09.2011, 15:03
        Using Multiple CPU Cores in DOS? - bretjohn, 19.09.2011, 19:50
        Using Multiple CPU Cores in DOS? - tom, 19.09.2011, 22:00
        Using Multiple CPU Cores in DOS? - bretjohn, 19.09.2011, 23:19
        Using Multiple CPU Cores in DOS? - tom, 20.09.2011, 12:02
        Using Multiple CPU Cores in DOS? - DOS386, 20.09.2011, 12:24
        Using Multiple CPU Cores in DOS? - bretjohn, 20.09.2011, 18:23
        Using Multiple CPU Cores in DOS? - tom, 20.09.2011, 20:17
        Using Multiple CPU Cores in DOS? - RayeR, 19.09.2011, 15:01
        Using Multiple CPU Cores in DOS? - bretjohn, 19.09.2011, 20:25
        Using Multiple CPU Cores in DOS? - RayeR, 20.09.2011, 03:14
- Using Multiple CPU Cores in DOS? - DOS386, 13.09.2011, 07:11
  - Using Multiple CPU Cores in DOS? - bretjohn, 13.09.2011, 19:14
  - Using Multiple CPU Cores in DOS? - FFK, 18.09.2011, 04:44
    - Using Multiple CPU Cores in DOS? - RayeR, 19.09.2011, 14:50
      - Using Multiple CPU Cores in DOS? - FFK, 21.09.2011, 01:30
- USBDOS | A20-BUG | no need for 1'000'000'000 cores - DOS386, 20.09.2011, 09:10
  - USBDOS | A20-BUG | no need for 1'000'000'000 cores - bretjohn, 20.09.2011, 19:34
- Using Multiple CPU Cores in DOS? - RayeR, 23.09.2011, 02:27