14 Oct
2005
14 Oct
'05
6:28 p.m.
Subject: Re: Releasing OS/2
From: "Chuck Guzis" <cclist at sydex.com>
Date: Fri, 14 Oct 2005 15:37:43 -0700
To: cctalk at classiccmp.org
On 10/14/2005 at 5:11 PM Allison wrote:
One approach. I ran a multiprocessor Z80 system back in '81-82 with one
difference idle processors (or processors idling) could take on tasks
While 1+ing the question we can add 8bit
multitasking for Z80 other than
MP/M to look at.
Molecular was running MT software simply by using a CPU card for each user. from the system exec.
That Durango system (that I'm STILL trying to give away) was designed from
the ground up with MT in mind. Since the 8085 can't do dynamic address
relocation very easily, we simply put the MT facilities in the compiled (to
a sort of P-code) BASIC. File access control and data sharing was a part
of it. Except for the very lowest level system utilities, all programs
were written in it. A 5 MHz 8085 could support 5 users quite comfortably.
Added memory was 1K pages, mapped through 64x9 bipolar RAM.
I've done a memory paged 8085 system, interesting.
I have to ask, how does all of this fit with the question?:
How does OS/2 warp V3 compare to other PC OSs like CDR Concurrnet386 or
win3.1?
Allison