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- Newsgroups: comp.os.msdos.misc
- Path: sparky!uunet!microsoft!hexnut!jenk
- From: jenk@microsoft.com (Jen Kilmer)
- Subject: Re: Is dos 6.0 gonna multitask? Or have no memory barrier????
- Message-ID: <1992Nov13.075607.23636@microsoft.com>
- Date: 13 Nov 92 07:56:07 GMT
- Organization: Microsoft Corporation
- References: <1992Nov10.060504.10390@netcom.com> <BxKoEC.JC8@news.cso.uiuc.edu> <1992Nov13.065801.22564@microsoft.com>
- Lines: 19
-
- In article <1992Nov13.065801.22564@microsoft.com> jenk@microsoft.com (Jen Kilmer) writes:
- >device=c:\dos\himem.sys
- >device=c:\dos\emm386.exe i=a000-afff
- >dos=umb
- >
- >Emm386 gets xms memory from himem, which it maps into unused areas
- >in the uma - including the A000 segment - which emm386 makes available
- >via the xms umb calls. DOS=UMB instructs MSDOS.SYS to request any & all
- ^^^^^^^^^
- Ooops...I'm not sure which part of MS-DOS handles this actually (prob
- the initialization module of IO.SYS, which handles CONFIG.SYS processing).
- Even ex-product support folks hate to be incorrect....
-
- >xms umbs and add them to the MS-DOS memory pool. Since the A000 segment
- >is contiguous with the rest of 'conventional' memory, it gets folded
- >into it. Nice, eh?)
-
- -jen
- not speaking for microsoft....
-