new find: an Intel MDS 800

From: Joe R. <>
Date: Sat Oct 30 09:20:52 2004

  That's interesting. I've never even heard of a white MDS-800 before. Was
it painted white originally or was it painted over an orginal blue one?

   I think you need a lot more than rewriting the BIOS to handle DD disks.
Intels DD controller has a 3000 series bit-slice CPU and some other odd
circuitry to handle DD.


At 11:39 AM 10/29/04 +0200, you wrote:
>I have a white MDS 800 System. It was sold in Germany by Siemens and they
>relabelled it to SME 800 ("Siemens Microcomputer Entwicklungssystem").
>It has an external 8"-double drive and a dumb terminal. Inside it is all
>Intel. The only thing they changed internal: The glued "Siemens"-labels
>over the original Intel-logos on the PCBs.
>You can see it:
>We are running ISIS-II inclusive KERMIT on it. One time Christian Corti
>succeeded to boot a CP/M 2.?. But in the meantime this disk was damaged.
>I found a very old CP/M source, dated "11/21/75" in the net, written in
>PL/M and was able to translate it with the original PL/M-compiler
>written in FORTRAN (dated: JAN 1975) on our SUN 4/260.
>What is needed: To adapt the original BIOS for single density disks to
>the double density drives on our system and to make bootable floppies.
> Klemens
>On Wed, 27 Oct 2004, Steve Thatcher wrote:
>> I lived in Munich, Germany for a year and a half back in 1983 while I was
>> working for Applied Microsystems. I developed a couple of the EM series
>> emulators and ran into a number of remarked Intel systems that said
>> on the outside.
>>> I've never heard of a Siemans system. The white MDSs that I've seen all
>>> have the standard Intel markings and labels. (I've got one sitting about 3
>>> feet from me as I type.)
>>> Joe
>klemens krause
>Stuttgarter KompetenzZentrum fyr Minimal- & Retrocomputing.
Received on Sat Oct 30 2004 - 09:20:52 BST

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