Anyone know how the Resistor Packs (14 pin and 16 pin chips) in the CALPACK work? I checked out Ludis' site but it only gives part numbers. I was measuring the resistance the other day while waiting for a PROM to erase and I noticed that they are not single independent resistors. They are connected together somehow. Does anyone know how?
Thanks

 

They are actually a NETRES.
Network resistor package.

The RFD (reduncant fuel device) looks at them when the processor dies.

 

After doing a few measurements with an ohmmeter I realized that the chips hold a resistor network as you said. Would you happen to have the network schematic (w/o resistor values)? I am trying to figure out what the resistor values are and how they are connected by observing just the I/O's of the chips. It is kind of tough because there could be many confingurations and resistor values. I guess I will figure it out eventually. Write now I am assuming a simple network.
Thanks for the response..........I didn't think anyone was going to touch this one.
J