🚀 go-pugleaf

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 |
+-----------------------------------+-----------------------------+