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SKS Nano 2500 #112427 01/31/18 10:34 PM
Joined: Jan 2012
Posts: 1,009
rfka01 Offline OP
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SKS Nano 2515 (2500 series)

[Linked Image]


SKS (Steinmetz-Krischke Systemtechnik) were responsible for the development of the Alphatronic Px series and the ITT3030.
Their designs are based on the MC-80 bus, and they also used them for products sold under their own name.

[Linked Image]

[Linked Image]

The SKS 2500 portable computer is a beautiful CP/M machine that comes in a sturdy wooden carrying case covered in bordeaux red
leather(ette). The model number is 2515, there seem to have been coprocessor and drive configuration options available.

[Linked Image]

Unfortunately, no boot media have been found until now. And DHL killed my machine by making the drive rails snap during transport. frown
One hope is that by emulating the Nano, a boot disk can be created from similar machines of SKS provenance.

The floppy drives are 80 track DS/QD Philips X-3114, and the boot sequence is supposed to be similar to the ITT3030 -
after switching on the machine you are presented with a blank screen, pressing "B" boots from the first floppy drive.

[Linked Image]

Thanks to TeamE for dumping the Nano's ROMs and PROMs.

Files are, as always, on the FTP and here.


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
Re: SKS Nano 2500 [Re: rfka01] #112499 02/05/18 05:38 PM
Joined: Jan 2012
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rfka01 Offline OP
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Sometimes the timing has to be right ... when I created above post I thought "what the heck" and put out a request for a bootdisk for the Nano on comp.os.cpm. Requests for this rare machine in Germany had petered out without success, but now I was surprised by an email from a gentleman in Sweden who used to have a Nano and kept the boot disks - and was able and kind enough to create boot images.

The disk format of the Nano is identical to its desktop sibling, the ITT3030 - 70 tracks, 16 sectors/track, 256 bytes/sector - and sure enough the ITT3030 driver is able to display the contents of the two disks:

[Linked Image]

Port addresses differ between the two machines, so the disks don't boot on the ITT3030 - but this was an unexpected and most pleasant surprise.

Here's Ole's website with more gems for vintage computers http://softsector.aplaholm.se/computers/

The disk images are here and on the FTP.


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20

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