On 10/2/2017 9:13 AM, Dominique Carlier via cctalk wrote:


Everything would be perfectly fine if most of the time I did not have at startup an error at line 9. of the POC test:

SERIAL I / O CHANNEL B: FAILED
I doubt the US unit you bought was used with a floppy running CPM. It most likely had a synchronous channel for connection to some network and ran just standalone.

I recall that there were modules of some sort you added to get some functionality, so as to not have to open the box.  I don't know if you set anything outside the box, but it may have some switches or such to indicate some other device is present that now is not.  So it would fail on power on test.

that's just a guess on which way I'd go to figure it out.  I don't have any documentation or anything other than having had one for about a year for a project I did to go on.

Mine had no floppies, but had a printer interface option attached which was the same as one that was on a Univac 1100 series mainframe I was making a controller for.  So I could  just run a standalone test and if my controller card was working it would spew on the printer. That option was also one of these things added on.  Never dug into anything as the device is pretty overengineered and without a lot of manuals and parts, you can't do much with it.

thanks
Jim

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