30 Oct
2004
30 Oct
'04
2:20 a.m.
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.
Joe
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:
http://computermuseum-stuttgart.de/dev/sme800
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.
Cheers
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
Siemens
on the
outside.
--
klemens krause
Stuttgarter KompetenzZentrum fyr Minimal- & Retrocomputing.
http://computermuseum.informatik.uni-stuttgart.de
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