Hi, Japheth is right, you have to say


to enable usage of both HMA and UMB for DOS purposes.

Otherwise, the HMA (HIGH) or UMB (UMB) would only be
accessible for programs which directly ask for them,
as opposed to LOADHIGH / DEVICEHIGH / kernel-in-HMA
which are the "DOS purposes" of UMB and HMA usage.

Regards, Eric

On 23.02.2011 21:09, Coleson, Greg wrote:
> I can't get jemmex.exe to supply any upper memory.  It seems to think
> that it is supplying it.  I tried it on 3 different systems. Just as a
> sanity check I tried MS-DOS and it did supply upper memory. Any ideas?

> Config.sys:
> device=a:\jemmex.exe i=A000-b7ff i=test x=test MAX=32M RAM VERBOSE

> JemmEx v5.73 [Dec  2 2010]

> EMS is On, 24 of max. 2072 pages allocated, Page Frame at e000.
> VCPI is On, 96 of max. 8288 pages allocated.
> DMA buffer at 00120000, size 64 kB.
> UMB supplied at a01f-b7ff, free.
> UMB supplied at c800-dfff, free.

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