Hi, here is an interesting suggestion from Jack: In spite of the
limitation of FreeDOS to support only one UMB provider, it seems
to be possible to do the following to mix different UMB sources:

> [...] It is NOT necessary to modify your kernel to get more UMBs
> in the monochrome-video area. A "one provider" solution is: [...]

>   DOS=HIGH,UMB
>   DEVICE=C:\...\LOWDMA.SYS
>   DEVICE=C:\...\UMBPCI.SYS
>   DEVICE=C:\...\HIMEMX.EXE
>   DEVICE=C:\...\UIDE.SYS ...
>   DEVICE=C:\...\JEMM386.EXE I=B000-B7FF S=nnnn-nnnn NOEMS [...]

> LOWDMA, provided with UMBPCI, is needed only if diskettes will
> be used. UMBPCI will find no XMS manager loaded yet, thus it
> only enables "Shadow RAM". HIMEMX loads before UIDE, as UIDE
> needs XMS. UIDE must load before JEMM386 enables "V86" mode,
> to be safe on new cheap-BIOS mainboards like Martin Rehak has.
> 
> JEMM386 can then provide the monochrome-video area (B000-B7FF)
> AND "Shadow RAM" (S= variables) as upper-memory to the kernel.

> S= values must be determined in advance, via programs provided
> with UMBPCI and JEMM386, as JEMM386 never had an S=TEST. [...]

Thanks for the suggestion! Regards, Eric


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