Re: Floppy controller - 7416 failure symptoms?
On Monday, November 01, 2010 12:23:25 am Mark Ormond did opine:
> Still trouble shooting floppy problems and was wondering if anyone can
> tell me type symptoms that failing 7416 chips would have in a
> controller? It's a fd500.
> Also on the fd500 note, does anyone know of a way to add the missing
> cart connectors? (Pin 37 actually, I need a13.)
> I was thinking maybe a rear defroster repair kit to make a contact with
> 30g kanar wire painted in and super glued running to the rom?
I have used several different methods over the years, with the longest
lasting being a strip of copper foil from a tape it up and solder it PCB
kit from 25 years ago. A 3/8" long piece of that, laid where the trace was
missing, and pressed in place by rolling it heavily, stuck it tightly
enough that it never came loose. I did form the end of it so it rolled
over the edge by about 5 thousandths so the socket connectors couldn't
catch it and get under it at insertion time. That board was in and out of
an old grey ghost many times as I did not have an MPI back in those days.
I think today, that I would see if I could get under a finger pattern that
was gold flashed with an exacto knife or similar, and roll it back flat &
super glue it with a very small drop of glue so it only glued the piece.
The most extreme bit of tom foolery along these lines is still in service.
I sawed the whole gold plated finger pattern off an expired ISA bus pc card