View Single Post
Old 1st Jul 2015, 6:11 pm   #10
SiriusHardware
Dekatron
 
Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,482
Default Re: The Sinclair / Science of Cambridge MK14

Quote:
Originally Posted by TonyDuell View Post
It clearly says 'Issue IV' on the solder side. It does not have any connections to the fingers of the rear edge connector on the solder side.
While you were writing that, I was reading this, from the top of page 3 of the VDU card manual (actually a folded piece of paper).

"First of all make the following connections. If you have an issue 4 or 5 board the connections can be made through a double sided connector at the top of the MK14 board". (This is followed by a long list of required signal connections including the address bus, data bus and control lines).

I've attached the whole document, which includes the VDU card circuit diagram, for your information / interest.

..And yet you say your issue IV PCB has no such connections available at the top edge. This is pretty typical of the chaotic nature of Sinclair's documentation in the early days.

Now we need to find someone who has an issue V to find out whether the 'V' did or did not have the double sided connector as the VDU document claimed it did.
Attached Files
File Type: pdf mk14VDU.pdf (1.53 MB, 382 views)
SiriusHardware is online now