DOS ain't dead - Jemm386 v5.8

Jemm386 v5.8 (Developers)

posted by Laaca , Czech republic, 06.11.2020, 19:47

> I checked what actually happens in Jemm when Ctrl-Alt-Del is catched (no
> FASTBOOT). I does
> - set a flag for soft-reset in CMOS ram
> - set 1234h in BIOS 40:72h
> - switch to real-mode
> - far jump to F000:FFF0 (or FFFF:0000)
>
> that's already what was proposed for altboot. It "should" work

Hm, I just tested the CTRL-ALT-DEL (without FASTBOOT) in the last prerelease of Jemm386 but it still does not work - computer just freezes like in the previous versions.
What about implementing some optional debug logs to track which step freezes the computer?

---
DOS-u-akbar!

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Complete thread:

Jemm386 v5.8 - Laaca, 28.10.2020, 22:06 (Developers)
- Jemm386 v5.8 - Japheth, 29.10.2020, 07:24
  - Jemm386 v5.8 - Laaca, 29.10.2020, 08:46
    - Jemm386 v5.8 - Japheth, 30.10.2020, 07:58
      - Jemm386 v5.8 - Laaca, 31.10.2020, 10:09
        Jemm386 v5.8 - Japheth, 31.10.2020, 15:32
        Jemm386 v5.8 - Laaca, 01.11.2020, 04:51
        Jemm386 v5.8 - Japheth, 01.11.2020, 07:48
        Jemm386 v5.8 - Laaca, 02.11.2020, 22:09
        Jemm386 v5.8 - Wengier, 03.11.2020, 03:14
        Jemm386 v5.8 - roytam, 09.04.2024, 09:56
        Jemm386 v5.8 - Laaca, 06.11.2020, 19:47
        Jemm386 v5.8 - Japheth, 07.11.2020, 01:44
        Jemm386 v5.8 - Japheth, 16.11.2020, 14:04
        Jemm386 v5.8 - Laaca, 17.11.2020, 21:32
        Jemm386 v5.8 - alternate reset port and reset value - Laaca, 31.01.2021, 00:59
        Jemm386 v5.8 - alternate reset port and reset value - Japheth, 31.01.2021, 08:06
        Jemm386 v5.8 - alternate reset port and reset value - Laaca, 31.01.2021, 11:28
        Jemm386 v5.8 - alternate reset port and reset value - Japheth, 31.01.2021, 16:33
        Jemm386 v5.8 - alternate reset port and reset value - Laaca, 31.01.2021, 21:01
        Jemm386 v5.8 - alternate reset port and reset value - RayeR, 03.02.2021, 03:58
        Jemm386 v5.8 - alternate reset port and reset value - Laaca, 03.02.2021, 07:21
        Jemm386 v5.8 - alternate reset port and reset value - RayeR, 03.02.2021, 13:29
        Jemm386 v5.8 - alternate reset port and reset value - Laaca, 03.02.2021, 18:15
        Jemm386 v5.8 - alternate reset port and reset value - RayeR, 03.02.2021, 19:01
        Jemm386 v5.8 - alternate reset port and reset value - RayeR, 04.02.2021, 23:21
        Jemm386 v5.8 - alternate reset port and reset value - Laaca, 06.02.2021, 00:38
        Jemm386 v5.8 - Laaca, 06.11.2020, 22:17
        Jemm386 v5.8 - Japheth, 07.11.2020, 01:47
  - Jemm386 v5.8 (Ctrl-Alt-Del issue) - Paul, 13.12.2020, 18:32
    - Jemm386 v5.8 (Ctrl-Alt-Del issue) - Japheth, 15.12.2020, 06:47