19 Mar
2008
19 Mar
'08
10:08 p.m.
The older Facit 4070s (including all the ones I've
every worked on) have
a pounch cotnrol/PSU board in the top slot. It has a parallel
interface. The interface connnections are wired to one side of the
bottom edge connector, the other side of that connector is wired to the
DB25 socket on the back of the machine. Normally there's a bridging
board in that lower connector, so you get he parallel interfavce brought
out there, but Facit also made an RS232 board (which is, of course, used
along with the control/PSU board) that went in there, some other
companies made custom boards for their own interfaces (HP was one such).
Tony and others interested:
A photo of the component side of the board, and one of the back end of
the unit, are available at:
http://yagi.h-net.msu.edu/facit4070/
These images are quite large, about 5 MB each. Forgive the quality;
setting up some kind of copy stand and lights for this kind of work is
still on the "pending round-tuit" list. But you should be able to read
the chips, etc.
Meant to do this a week ago, but it's been one of those weeks.
De