DOS ain't dead - HimemSX Issues

HimemSX Issues (Announce)

posted by Japheth , Germany (South), 23.10.2020, 05:04

Hello Jack,

first, thanks for your RDISK utility, which doesn't use "unreal"-mode and therefore was a very good candidate for HimemSX test!

> > HimemSX as written has some SERIOUS "issues". Its "block move"
> > call cannot be used in "V86" mode, or the PC will CRASH!

It may crash, true. However, with the patched RDISK I only get a simple I/O error when accessing the ramdisk after Jemm386 is loaded. And after Jemm386 has been unloaded, access to the ramdisk is possible again.

> > What is needed is to update the "Int 15h, AH-87h" request within
> > JEMM386/JEMMEX to support "high XMS" memory. If done properly,
> > DOS systems will NOT lose "V86" mode, and "special" drivers like
> > XMGR or XHDD should need only minor changes (adding a "high XMS"
> > page number, etc.).

True. It's already mentioned in the HimemSX readme.txt: "It's planned to extend Jemm386 so that HimemSX's function 0Bh will fully work together with Jemm386 in the future."

> > But unless it is only a "proof of concept", HimemSX is the WRONG
> > place to do "high XMS" moves!

No, since I prefer "UMBPCI/XMS-only" systems these days.

I should probably mention: the main reason for development of HimemSX was to allow full usage of a system's RAM for 64-bit apps, using dos64stb. The "super-extended" block move feature was just a "goodie".

---
MS-DOS forever!

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Complete thread:

HimemSX, another HimemX variant - Japheth, 21.10.2020, 13:54 (Announce)
- HimemSX, another HimemX variant - tkchia, 21.10.2020, 17:51
  - HimemSX, another HimemX variant - RayeR, 22.10.2020, 00:48
    - V86 compatibility? Yes, Jemm386 v5.8 - Japheth, 26.10.2020, 19:32
      - V86 compatibility? Yes, Jemm386 v5.8 - RayeR, 27.10.2020, 06:54
        V86 compatibility? Yes, Jemm386 v5.8 - Japheth, 27.10.2020, 07:49
        V86 compatibility? Yes, Jemm386 v5.8 - RayeR, 27.10.2020, 13:11
        V86 compatibility? Yes, Jemm386 v5.8 - RayeR, 28.10.2020, 05:47
        V86 compatibility? Yes, Jemm386 v5.8 - Japheth, 28.10.2020, 07:06
        V86 compatibility? Yes, Jemm386 v5.8 - RayeR, 28.10.2020, 23:26
        V86 compatibility? Yes, Jemm386 v5.8 - Japheth, 29.10.2020, 03:16
        V86 compatibility? Yes, Jemm386 v5.8 - RayeR, 29.10.2020, 03:31
        V86 compatibility? Yes, Jemm386 v5.8 - Japheth, 31.10.2020, 02:20
        V86 compatibility? Yes, Jemm386 v5.8 - RayeR, 02.11.2020, 00:31
        cwsdpmi version? Possible fix for Borland tools. - Japheth, 02.11.2020, 07:12
        cwsdpmi version? Possible fix for Borland tools. - Laaca, 02.11.2020, 19:21
        cwsdpmi version? Possible fix for Borland tools. - RayeR, 03.11.2020, 08:00
        cwsdpmi version? Possible fix for Borland tools. - Japheth, 03.11.2020, 15:11
        cwsdpmi version? Possible fix for Borland tools. - RayeR, 04.11.2020, 05:43
        Possible fix for cwsdpmi trouble - Japheth, 05.11.2020, 07:53
        Possible fix for cwsdpmi trouble - RayeR, 06.11.2020, 13:49
        Possible fix for cwsdpmi trouble - Japheth, 06.11.2020, 14:39
        Possible fix for cwsdpmi trouble - Laaca, 06.11.2020, 19:50
        Possible fix for cwsdpmi trouble - Japheth, 07.11.2020, 01:37
        Possible fix for cwsdpmi trouble - RayeR, 06.11.2020, 20:31
        Possible fix for cwsdpmi trouble - RayeR, 07.11.2020, 06:17
        Possible fix for cwsdpmi trouble - Japheth, 08.11.2020, 11:51
        Possible fix for cwsdpmi trouble - RayeR, 08.11.2020, 17:39
        CWSDPMI r7 NOVCPI test - RayeR, 10.11.2020, 03:16
        CWSDPMI r7 NOVCPI test - Japheth, 10.11.2020, 06:17
        CWSDPMI r7 NOVCPI test - rr, 10.11.2020, 11:47
        CWSDPMI r7 NOVCPI test - Japheth, 10.11.2020, 18:49
        CWSDPMI r7 NOVCPI test - Rugxulo, 10.11.2020, 21:16
        CWSDPMI r7 NOVCPI test - RayeR, 11.11.2020, 02:28
        CWSDPMI r7 NOVCPI test - Japheth, 11.11.2020, 07:56
        CWSDPMI r7 NOVCPI test - RayeR, 14.11.2020, 02:04
        CWSDPMI r7 NOVCPI test - awik, 18.11.2020, 17:59
        CWSDPMI r7 NOVCPI test - roytam, 17.05.2024, 19:00
      - V86 compatibility? Yes, Jemm386 v5.8 - Zyzzle, 27.10.2020, 15:14
- HimemSX, another HimemX variant - Zyzzle, 22.10.2020, 03:38
  - HimemSX, another HimemX variant - Japheth, 22.10.2020, 06:39
    - HimemSX, another HimemX variant - Zyzzle, 23.10.2020, 04:54
      - HimemSX, another HimemX variant - Japheth, 23.10.2020, 06:47
        HimemSX, another HimemX variant - Zyzzle, 23.10.2020, 14:00
        HimemSX, another HimemX variant - Japheth, 23.10.2020, 17:32
        HimemSX, another HimemX variant - Laaca, 23.10.2020, 19:14
        HimemSX, another HimemX variant - RayeR, 23.10.2020, 23:06
        HimemSX, another HimemX variant - Zyzzle, 24.10.2020, 01:52
        HimemSX, another HimemX variant - Japheth, 24.10.2020, 05:45
        HimemSX, another HimemX variant - Zyzzle, 24.10.2020, 10:50
        HimemSX, another HimemX variant - RayeR, 24.10.2020, 23:10
        HimemSX, another HimemX variant - Japheth, 03.11.2020, 04:53
        HimemSX, another HimemX variant - RayeR, 03.11.2020, 06:50
        HimemSX, another HimemX variant - CandyMan, 05.11.2020, 19:14
        HimemSX, another HimemX variant - Japheth, 06.11.2020, 08:33
        HimemSX, another HimemX variant - RayeR, 06.11.2020, 13:37
  - HimemSX, another HimemX variant - Rugxulo, 22.10.2020, 20:31
    - HimemSX, another HimemX variant - Zyzzle, 23.10.2020, 04:37
      - HimemSX, another HimemX variant - RayeR, 23.10.2020, 23:13
      - HimemSX, another HimemX variant - marcov, 24.10.2020, 01:07
- HimemSX Issues - Khusraw, 22.10.2020, 21:52
  - HimemSX Issues - Japheth, 23.10.2020, 05:04