Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!yale!mintaka!ogicse!pdxgate!eecs!berggren
From: berggren@eecs.cs.pdx.edu (Eric Berggren)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: XMS to EMS driver wanted
Message-ID: <1011@pdxgate.UUCP>
Date: 31 Dec 90 06:23:06 GMT
References: <999@pdxgate.UUCP> <1990Dec29.173158.25522@xrtll.uucp>
Sender: news@pdxgate.UUCP
Lines: 21

silver@xrtll.uucp (Hi Ho Silver) writes:

>   Unless your hardware supports accessing this memory as expanded, your
>only choice is a program which steals a 64K chunk of main memory and
>physically copies data back and forth between it and your extended memory.
>PC Magazine has such a program (EMS40.SYS).  But be forewarned that it's
>painfully slow, since it doesn't just remap the memory, it actually copies
>it, and that you'll lose about 70K of conventional (the first 640K) memory
>(64K for the page frame plus whatever the driver takes up).

  Also, I thought XMS boards were just sorta "generic" with no varying
fancy built-in hardware unlike EMS boards. As far as I know, mine is
just plain vanilla, of which I am able to use HIMEM.SYS and any utils.
that support extended memory.
  BTW, is UMB (Upper Memory Block) the same as EMS ? I haven't been able
to determine exactly what it is. Thanx.


==============================================================================
  Eric Berggren             |   "Round and round the while() loop goes;
  Computer Science/Eng.     |         Whether it stops," Turing says,