Hi Clarence!
08 Jan 2002, "Clarence Verge" <[EMAIL PROTECTED]> wrote:
CV> I had done some early experiments with an Orchid '286 Turbo board with
CV> 2 megs of memory and found I could not use the upper meg for anything
CV> but a ramdisk. :(
have you loaded himem.sys ?`
CV> I have just now read my DOS 5 manual, which says you CAN have XMS on
CV> 286 and higher processors.
yes
CV> So, I'm confused ! The MSDOS document seems to say YES you can have
CV> XMS, but later goes on to say you must have a '386 or higher if you
CV> want to load programs into upper memory ! i.e EMM_386_.
CV> You can have it but you can't use it ??
you can have xms and use it.
You can't have UMBs without emm386/qemm386 and a 386.
(because the 286 did not contain a MMU memory management unit)
CV> I still can't find anything that will allow use of the space between
CV> 640k and 1Mb. You need a UMB provider for that. That's EMM_386_.
it's (nearly) impossible to use UMBs on 286.
(there was a chipset for 286 which had its own MMU, so you could use UMBs,
but it was exotic and rarly used)
CV> *On some computers, you may even be able to use HIMEM.SYS itself as
CV> the UMB provider.*
IMHO not ... with maybe the NEAT chipset from above as an exception.
CV> - Clarence Verge.
CU, Ricsi
--
|~)o _ _o Richard Menedetter <[EMAIL PROTECTED]> {ICQ: 7659421} (PGP)
|~\|(__\| -=> Practice makes perfect <=-
