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From: aptr@ur-tut.UUCP (The Wumpus)
Newsgroups: net.micro,net.micro.pc
Subject: Re: Looking for multi-tasking PC applications/OS's
Message-ID: <652@ur-tut.UUCP>
Date: Sat, 30-Aug-86 16:24:30 EDT
Article-I.D.: ur-tut.652
Posted: Sat Aug 30 16:24:30 1986
Date-Received: Sat, 30-Aug-86 21:51:23 EDT
References: <76@rdlvax.UUCP> <2192@milano.UUCP>
Reply-To: aptr@ur-tut.UUCP (The Wumpus)
Organization: Univ. of Rochester Computing Center
Lines: 31
Xref: mnetor net.micro:5952 net.micro.pc:6344

In article <2192@milano.UUCP> tsmith@milano.UUCP writes:
> I am looking for a program or an operating system for a PC (XT/AT) that
> will allow multiple applications to be run concurrently.

Well, I can think of 2 packages off hand.  One is Double Doss sold by Soft
Logic Solution, the other is Concurrent PC DOS sold by Digital Research.
I have use both products, and preffer concurrent PC DOS.

Double Dos splits the computer's memory into two pieces, and then lets you
run a program in each by switching registars on the 8088 (8086) every so
many machine cycles.  The drawback of this system is that it only allows one
program to have control of the screen at one time, and it gets very upset
and confused at programs that refuse to wait for it to give them a display.

Concurrent PS Dos is really an implementation of CP/m-86 for the PC with the
ability to run both CP/m and MS-DOS (PC-DOS) software.  Unfortunately, there
are some programs it does not get along with, mostly the memory resident
ones (ie. sidekick).  It does, however, provide the ability to split the
computers memory into 4 pieces if the computer has less then 256k (?) and up
to, I think, 8 if the computer has a full 640.  The system uses windows to
display the output from programs.  With it,you can bring any window in
front, define any window to be as big or little as you want it, and choose
where any window is located on the screen.  You can also change the size of
memory allocated to any window from the command prompt for Concurrent PC DOS.

hope this helps,
-- 
The Wumpus        UUCP:   {seismo,allegra,decvax}!rochester!ur-tut!aptr
                  BITNET: aptrccss@uorvm

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