Re: IIGS motherboard card edge connector

[quadrajet1@aol.com (Quadrajet1)]

>quadrajet1@aol.com (Quadrajet1) writes:
>>>Just curious whether or not anyone know what connects to the card edge
>>>connector on the front end of a GS motherboard.
>>
>>   I believe that was for testing the board during and after manufacturing.
> I
>>think the //e and //c have a connector too, but not the same kind.  It's
>been a
>>while since I worked on those, so this is by memory.
>
>So what kind of computer was the board plugged into, and what kind of
>information could it read? I presume it's more detailed than a self
diagnostic.

   I would have to trace it out, but I would imagine the voltages, a clock
signal or two, reset line, interrupt line, speaker output.  Stuff they can
monitor to see if the board failed.

  I know the //c (I think....) had an LED on the edge of the board that was
hooked to the speaker output.  When the board was in continous self test, the
speaker would emit a loud sound, which would light the LED.  When the board was
in a test rack, (without a speaker, of course...) with many others, all they
had to do was look at the LED, and know the board was still running the self
test.

Raymond