DOS ain't dead - JEMM(EX) and too much XMSHANDLES problem

JEMM(EX) and too much XMSHANDLES problem (Announce)

posted by Japheth , Germany (South), 13.03.2026, 08:43

> Unfortunatelly no change when removed.

I'm not sure if this is "unfortunate" - it would still have been puzzling if the crash had vanished. There's now a strong indication that a return address stored on the stack may get corrupted - the bytes displayed at [CS:IP] in your crash screenshot are a valid part of Jemm, but they definitely belong to 32-bit protected-mode and should never run in v86-mode.

> I went back in time and found that the JEMM behavior changed since version
> 5.79 (crashing, 5.78 no)

Hm, ok - but v5.78 is from 2012, and there were lots of changes for v5.79. You could try to create JemmExL.exe ( the "legacy" variant ). That variant disables a significant part of those changes. I have a 2 GB machine with ACPI available, so I probably will test the current JemmEx myself...

---
MS-DOS forever!

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Complete thread:

AweMidi - a Dos32Awe alternative - Japheth, 18.02.2026, 08:38 (Announce)
- AweMidi - a Dos32Awe alternative - Japheth, 23.02.2026, 08:13
- AweMidi - a Dos32Awe alternative - RayeR, 02.03.2026, 06:45
  - AweMidi - a Dos32Awe alternative - Japheth, 02.03.2026, 14:34
    - AweMidi - a Dos32Awe alternative - RayeR, 02.03.2026, 18:32
- JEMM(EX) and too much XMSHANDLES problem - RayeR, 09.03.2026, 04:28
  - JEMM(EX) and too much XMSHANDLES problem - Japheth, 09.03.2026, 12:54
    - JEMM(EX) and too much XMSHANDLES problem - RayeR, 09.03.2026, 15:00
    - JEMM(EX) and too much XMSHANDLES problem - RayeR, 10.03.2026, 02:12
      - JEMM(EX) and too much XMSHANDLES problem - Japheth, 10.03.2026, 08:44
        JEMM(EX) and too much XMSHANDLES problem - RayeR, 10.03.2026, 14:20
        JEMM(EX) and too much XMSHANDLES problem - RayeR, 11.03.2026, 03:44
        JEMM(EX) and too much XMSHANDLES problem - Japheth, 11.03.2026, 07:51
        JEMM(EX) and too much XMSHANDLES problem - RayeR, 12.03.2026, 01:54
        JEMM(EX) and too much XMSHANDLES problem - Japheth, 12.03.2026, 08:11
        JEMM(EX) and too much XMSHANDLES problem - RayeR, 12.03.2026, 14:03
        JEMM(EX) and too much XMSHANDLES problem - Japheth, 12.03.2026, 15:18
        JEMM(EX) and too much XMSHANDLES problem - RayeR, 12.03.2026, 16:36
        JEMM(EX) and too much XMSHANDLES problem - bretjohn, 12.03.2026, 23:35
        JEMM(EX) and too much XMSHANDLES problem - RayeR, 13.03.2026, 02:30
        JEMM(EX) and too much XMSHANDLES problem - Japheth, 13.03.2026, 08:43
        JEMM(EX) and too much XMSHANDLES problem - Japheth, 13.03.2026, 15:07
        JEMM(EX) and too much XMSHANDLES problem - RayeR, 14.03.2026, 02:47
        JEMM(EX) and too much XMSHANDLES problem - Japheth, 14.03.2026, 03:57
        JEMM(EX) and too much XMSHANDLES problem - RayeR, 16.03.2026, 21:57
        JEMM(EX) and too much XMSHANDLES problem - Japheth, 17.03.2026, 12:05
        JEMM(EX) and too much XMSHANDLES problem - RayeR, 17.03.2026, 13:39
        JEMM(EX) and too much XMSHANDLES problem - Japheth, 17.03.2026, 17:46