Quote:
Originally Posted by JohnBHanson
Tony:-
I am guessing that you machine consists of a GM813 CPU Card, a GM832 video card and either a GM849/GM849A disk controller. You may either have a SCSI disk, or an MFM disk via a zebec controller.
Do you have details of the UART that was on the network card? or network boot roms/software?
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I will have to check what boards are in mine. But yes, SCSI disk interface on the controller board with Xebec controller hung off it to an ST412-interfaced hard disk.
The network UART is one of the AY-5-1013 / 6402 'dumb' things. It's on a little board with a baud rate generator and RS485 drivers. There's a little about it here :
https://nascom.wordpress.com/gemini/.../g836-network/
I did manage to work out the circuit diagram, I will try to find it.
I don't think I have a network boot ROM. I think the machine booted from the hard disk (and that it was probably the file server).