30 May
2008
30 May
'08
9:01 p.m.
From: roger.holmes at microspot.co.uk
Date: Fri, 30 May 2008 21:09:13 +0100
To: cctalk at classiccmp.org
Subject: Re: Introduction
On 30 May, 2008, at 18:00, cctalk-request at classiccmp.org wrote:
---snip---
Message: 9
Date: Fri, 30 May 2008 17:11:02 +0200
From: Oliver Lehmann
Subject: Introduction
To: Classic Computers Mailing List
Welcome Oliver.
The system runs a Z8001 with 3 MMUs and
Z80-peripherial ICs (PIO,
SIO...)
It also has 2 SIOs for 4 terminal connections, and one PIO to
connect the
WDC. The system also has two furhter PIO chips to establish a
connection
to the 8Bit system. The system runs with up to 4MB of DRAM but it
might
run with more RAM with self-made RAM modules.
When I retire I might get around to getting myself a Z8001 system if
there's any still around by then. I am kept busy at work programming
Apple Macs and at home restoring a 1962 mainframe computer (ICT 1301)
and restoring/maintaining my old cars (2 Daimlers, 2 Rovers, a Land
Rover, a Jaguar and a BMW).
Hi
One can still get a Olivetti M20 but mose I've seen come up on
the Italian eBay. These don't have a MMU but instead use a ROM
to decode segements. It is limited to 512K of RAM.
It does have one segement where the data and instruction are
mapped to two different physical memories, giving a total of
128K within one segement.
The M20 can run the version of CP/M that DRI came up with.
It has a C compilers as well asn an assembler. It can also have
a hard disk connected but the original controllers are hard to find.
It is software compatable with the WD1000 controller. I use
a TRS80 controller and a ST251 drive. I did need to modify
the code to deal with stepping differences between the original
olivetti drive and the ST251. I just use the auto stepping.
Dwight
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