DOS ain't dead - V86 compatibility? Yes, Jemm386 v5.8

V86 compatibility? Yes, Jemm386 v5.8 (Announce)

posted by Zyzzle, 27.10.2020, 15:14

> > "...will fail if cpu is in v86-mode..." :(
> > Is is technically possible to overcome this obstacle when acessing
> beyond
> > 4GB and make it compatible with V86 mode?
>
> Yes, of course. Today I updated Jemm386 on github (new v5.8 prerelease) -
> it has now an extended Int 15h, ah=87h emulation that allows HimemSX to
> access up to 1 TB in v86-mode.

Thank you! I compiled new HIMEMSX.EXE (10-27-2020), size of new binary is 6666 bytes! This version works well for me in v86 mode, on preliminary tests, I can invoke RDISKSX /s4095, and get a 4gb ramdisk which will write without access errors, at excellent speed, about 1.5 gb per second.

(but unfortunately I still must disable write combining on my linear framebuffer VESA graphis, but enabling write combining for VGA area by MTRRLFBE or fastvid works, greatly enhances VGA speed, with NO slowdown of HIMEMSX, or JEMMEX).

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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