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- From: S_BUCK@rzmain.rz.uni-ulm.de (Buck Martin)
- Subject: Info about EMM386 and DOS=HIGH wanted!!!
- Message-ID: <1993Jan7.081002.1841@wega.rz.uni-ulm.de>
- Sender: news@wega.rz.uni-ulm.de (News Net)
- Organization: University of Ulm, Germany
- Date: Thu, 7 Jan 1993 08:10:02 GMT
- X-News-Reader: VMS NEWS 1.24
- Lines: 38
-
- I need some information about Mess-DOS 5.0's EMM386-driver and the
- DOS=HIGH feature.
-
- First, the question about EMM386:
- What is the use of its L=xxxx switch? I know it's used to reserve a
- certain amount of extended memory, but why do I have to use this
- switch? When I have 3Mb of extended memory and want to use 1Mb of it
- as expanded memory, I write: EMM386 1024 RAM. Is it true, that in
- this case EMM386 takes the whole 3Mb of extended memory, changes 1 Mb
- to expanded memory and leaves the other 2Mb unused (and inaccessi-
- ble)? If so, what is the reason for this? If not, how does it really
- work?
-
- I'd also like to know, if there is any (shareware) expanded-memory-
- manager for the 386 that doesn't switch the CPU to virtual mode (if
- this is possible at all). If such an emulator exists, where can I get
- it from?
-
- My third question is about the DOS=HIGH feature when using HIMEM.SYS:
- Is there any possibility to prevent Mess-DOS from using the HMA if
- there is a DOS=HIGH statement in the CONFIG.SYS? As far as I know,
- DOS prescans the CONFIG.SYS before loading any drivers and searches
- for a DOS=HIGH statement. If the last DOS= statement is DOS=HIGH,
- then DOS reserves the HMA as soon as it becomes available (after
- loading HIMEM.SYS).
- Does anybody know, how to force DOS into low memory though there is a
- DOS=HIGH statement (it must be possible; I've seen 2 multi-configura-
- tion-programs doing this)?
-
- Thanks,
- Martin Buck
-
-
- +-----------------------------------+-----------------------------+
- | Martin Buck | Internet: |
- | Student of electrical engineering | |
- | University of Ulm, Germany | S_BUCK@RZMAIN.RZ.UNI-ULM.DE |
- +-----------------------------------+-----------------------------+
-