DOS ain't dead - CauseWay DOS extender

CauseWay DOS extender (Announce)

posted by Rugxulo , Usono, 28.02.2025, 05:26

> 2. Not exactly a CauseWay issue, but rather an Open Watcom one: dynamic
> memory management of the "DOS32" branch is exceptionally slow. My "real
> world" test case is FTE editor: to load a 130 MB file with the Win32
> variant takes about 1 sec., while the DOS32 variant needs almost 2 minutes!

(Not to pretend to be a systems developer, I'm not.)

In fairness, Windows is a multi-billion dollar company. So it's not quite a fair comparison. (The system requirements are much higher.)

Maybe it's related to 4 kb pages? Remember that CWSDPMI r7 added support for (Pentium) 4 MB pages (but can be disabled). IIRC, he said that wouldn't work under EMM386 or be swapped out.

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Complete thread:

CauseWay DOS extender - Japheth, 25.02.2025, 16:04 (Announce)
- CauseWay DOS extender - rr, 25.02.2025, 20:22
- CauseWay DOS extender - tkchia, 26.02.2025, 16:03
  - CauseWay DOS extender - Japheth, 27.02.2025, 15:30
    - CauseWay DOS extender - Rugxulo, 28.02.2025, 05:26
      - CauseWay DOS extender - Japheth, 28.02.2025, 07:14
        CauseWay DOS extender - Rugxulo, 28.02.2025, 10:30
      - CauseWay DOS extender - tkchia, 28.02.2025, 16:36
    - CauseWay DOS extender - tkchia, 28.02.2025, 16:51
    - CauseWay DOS extender - DosWorld, 28.02.2025, 23:11
- CauseWay DOS extender v5 - Japheth, 28.03.2025, 08:12
  - CauseWay DOS extender v5 - RayeR, 30.03.2025, 04:03
    - CauseWay DOS extender v5 - Japheth, 30.03.2025, 05:33
      - CauseWay DOS extender v5 - tkchia, 30.03.2025, 16:59
        CauseWay DOS extender v5 - Japheth, 30.03.2025, 17:27
        CauseWay DOS extender v5 - tkchia, 30.03.2025, 19:45
        CauseWay DOS extender v5 - RayeR, 01.04.2025, 16:10
        CauseWay DOS extender v5 - Japheth, 02.04.2025, 14:03
        CauseWay DOS extender v5 - DosWorld, 02.04.2025, 04:24
        CauseWay DOS extender v5 - tkchia, 05.04.2025, 07:41
      - CauseWay DOS extender v5 - roytam, 31.03.2025, 18:45
        CauseWay DOS extender v5 - Japheth, 01.04.2025, 08:56
        CauseWay DOS extender v5 - roytam, 01.04.2025, 14:32