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> The Z-2 used the S-1000 bus

That should be S-100. Ess one hundred, not ess one thousand.

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Thanks for the correction.

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Cromemco invented it and it became *the* standard expansion bus in the early microcomputer era: the mid-to-late 1970s. (Before my time!)

Cromemco had some interesting tech. There is a little museum page devoted to them here:

http://infolab.stanford.edu/pub/voy/museum/pictures/display/3-5-CROMEMCO.html

Their early machines ran CP/M but later they had 2 OSes of their own: CDOS and Cromix.

Cromix is a Unix-like OS for the Z80, incredibly enough. There is a bit about running it under an emulator here:

https://www.sydneysmith.com/wordpress/1759/running-cromix-on-windows/

A flyer for the OS:

https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=1667547

CDOS was a sort of enhanced CP/M with extra facilities. CDOS ran CP/M apps but CDOS apps couldn't run on CP/M. It ran on the Z80 only, while CP/M and most CP/M apps were native to the slightly more basic Intel 8080.

The same author has some info on CDOS, and running it on an emulator:

http://www.sydneysmith.com/wordpress/run-cdos/

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Thanks for doing this - these are fun! One of my favorite computer advertisers that really got me dreaming was The Digital Group. Two other favorite vendors Heathkit and Ohio Scientific. My favorite peripheral was the Teletype Model 43 printing terminal.

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author

Glad you enjoy these ads. Heathkit is on my list. I'll have to add the others.

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