Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!srcsip!orion!rogers
From: rogers@orion.SRC.Honeywell.COM (Brynn Rogers)
Newsgroups: comp.sys.ibm.pc
Subject: HIMEM.SYS  loading device drivers past 1Meg.
Summary: Does HIMEM.SYS work? How do set it up?
Message-ID: <26663@srcsip.UUCP>
Date: 31 Jul 89 19:53:21 GMT
Sender: news@src.honeywell.COM
Reply-To: rogers@orion.UUCP (Brynn Rogers)
Distribution: na
Organization: Honeywell Systems & Research Center, Camden, MN
Lines: 18


   I am under the impression that HIMEM.SYS can be loaded to use
first 64K past 1Meg as real memory (on 286's only).

   How do I get it to work? I have a good 50K of device drivers that
suck up my memory.  I have tried it (HIMEM.SYS) in the past but it didn't
seem to make a difference, but before I go experimenting with it 
again I would like to hear from someone who has it working right.
(You need to have 1 Meg of memory to do this trick)

   The trick that you can use on a 286 to get 640K +64K-16 Bytes of 
real mode memory is this:
on a 286 the segment FFFF:0000 to FFFF:FFFF is real memory located
from 0FFFF0 to 10FFEF; but on a 8086 it wraps around from 0FFFF0 to 00FFEF.
so 100000 to 10FFEF are available to be used ( FFFF0 to FFFFF is ROM,
in fact, every 80x86 starts executing at FFFF0)
 Brynn Rogers    Honeywell S&RC        rogers@src.honeywell.com
       612-782-7737                use this address if your reply bounces