Path: utzoo!attcan!uunet!ncrlnk!ncr-sd!hp-sdd!ucsdhub!sdcsvax!ucsd!ames!killer!texbell!merch!cpe!neese
From: neese@cpe.UUCP
Newsgroups: comp.sys.ibm.pc
Subject: Re: Questions on Unitech and Tandy
Message-ID: <3200004@cpe>
Date: 24 Jan 89 23:13:00 GMT
References: <149000025@inmet>
Lines: 27
Nf-ID: #R:inmet:149000025:cpe:3200004:000:1224
Nf-From: cpe.UUCP!neese    Jan 24 17:13:00 1989


You didn't leave a mail path so,....

It is interesting you mentioned hardware incompatibilities.  I know
of none.  For instance, SCO's standard Xenix product runs fine on the
4000 and it really depends on the hardware to be in the right place.

I have used Autocad and haven't had any problems with it and I believe
a magazine published some performance figures based on Autocad and
the 4000.

The memory stuff you mentioned is done the same way in several other
makers of AT boxes.  The memory between 640 and 1MB is shadow ram.
That area of memory is defined in the AT standard as a place
for BIOS's and video.  It is not supposed to be used by a program
except for those uses I have stated.  If a program is attempting
to use that area of memory for real memory, then the program is
at fault.  The 4000 does not remap that area above 1MB so it is
not available to any program.  The DOS functions for determining
the memory in a system all return the correct values.  They do not
reflect the 384K that is mapped between 640 and 1MB.  If you would
E-mail me some more details, I will be happy to find out what is
going on.

					Roy Neese
					Tandy Computer Product Engineering
				UUCP@	{killer,texbell,merch}!cpe!neese