anti-uv eprom labels

[Tony Duell]

> 
> 
> Does anyone know who sells sheets of uv-blocking labels for eproms? 

I normally use the foil write-enable tabs for 8" floppies (on the grounds 
they're the right size and I have plenty of them). I may stick a paper 
label over that if I need to label the EPROM in some way.

Actually, just about anything will do. Unless you're going to be leaving 
this board out in the sun all day, it's not going to get much UV light on 
it. So a paper label on its own should be easily enough.

I think the EPROM pacakage was made upside-down :-). If the quartz window 
had been on the bottom, it would have been effecrtively covered when the 
EPROM was fitted into a socket. It would have been easy to put the EPROMs 
in an eraser with the pins towareds the UV source.

Of course you then couldn't have erased the EPROMs when they were fitted 
to the PCB, but very few boards allowed you to program the EPROMs without 
removing them, so this would be no problem [1].

[1] Yes, I do know the DEC Omnibus EPROM module that has a bank of 1702As 
on it, which are connected to the rest of the logic by edge fingers on 
the top edge of the PCB with plug-on jumper blocks. Apprenetly you 
connected special cables between those top connectors and a 1702A 
programmer to program the soldered-in 1702s. I am not sure why they did 
this, I think turned-pin sockets would have been cheaper and as reliable.

-tony