DOS ain't dead

HimemX 3.34 (Announce)

posted by Rugxulo , Usono, 11.03.2020, 02:17

I'm a bit confused whether this is referring to HIMEMX or JEMMEX [sic], but Eric Auer wanted to mention to you:

> http://www.ibiblio.org/pub/micro/pc-stuff/freedos/files/dos/himem/himemx/himem334-unofficial-rp.zip
>
> (Pemberton 2013 patch)
>
> has the issue that it only checks carry flag after int 15.8a, but
> that is not enough to catch every BIOS without proper support. And
> it rarely is necessary to use int 15.8a at all ("Dimitrios case").
>
> himemx 3.32 used int 15.e820 - int 15.e801 - int 15.88 whereas
>
> himemx 3.34 does [15.e820 multiblock] [15.e801 - 15.8a - 15.88]
>
> While the JEMM updates reminded me of himem multiblock, I suggest to
> change (not e820alloc, but only) geti15mem from try_8Ah to try_88h
> to either: 1. NOT call int 15.8a at all, or 2. pre-load DX:AX with a
> magic value, then see if it really changed, or 3. not use int 15.8a
> UNLESS some new command line option enables it. I guess 1. is fine.
>
> This would be a small but helpful change to HIMEMX

Although, FYI, I think Mateusz Viste did some minor cleanups and mirrored HimemX to SourceForge here (in 2015). I haven't diff'd these versions, though.

Complete thread:

• jemm update - Japheth, 13.01.2020, 20:19 (Announce)
  • jemm update - Oso2k, 14.01.2020, 01:21
  • jemm update - RayeR, 14.01.2020, 18:23
    • jemm update - Japheth, 14.01.2020, 20:14
      • jemm update - RayeR, 16.01.2020, 00:37
        • jemm update - Japheth, 16.01.2020, 19:08
          • jemm update - RayeR, 16.01.2020, 22:02
            • jemm update - roytam, 17.01.2020, 06:41
              • jemm update - RayeR, 18.01.2020, 02:14
  • jemm final version 5.79 - Japheth, 02.02.2020, 20:25
    • jemm final version 5.79 - CandyMan, 14.02.2020, 19:56
      • jemm final version 5.79 - Rugxulo, 14.02.2020, 21:48
      • jemm final version 5.79 - Japheth, 15.02.2020, 07:42
        • jemm final version 5.79 - iw2evk, 08.03.2020, 10:25
          • jemm final version 5.79 - Laaca, 08.03.2020, 13:31
          • jemm final version 5.79 - Japheth, 08.03.2020, 19:14
      • jemm v5.80pre1 - Japheth, 09.03.2020, 13:32
        • HimemX 3.34 - Rugxulo, 11.03.2020, 02:17
          • HimemX 3.34 - Doug, 11.03.2020, 06:55
          • HimemX 3.34 - Japheth, 11.03.2020, 12:28
        • jemm v5.80pre1 - Wengier, 31.03.2020, 03:12
          • jemm v5.80pre1 - Wengier, 31.03.2020, 03:39