View Full Version : Active Termination Card?

January 27th, 2011, 10:03 AM
Does anyone have a source for one? Alternatively, a schematic (I have a kludge card that might work).

I'm using CCS boards in a IMSAI chassis and want to rule out signal issues on the bus.


January 27th, 2011, 10:36 AM
Before you go too far, have a read of the discussion of S100 bus termination over at Herb Johnson's retrotechnology site (http://www.retrotechnology.com/herbs_stuff/s_term.html).

The most simple-minded of active termination for S100 appears to be a ~~2.85V regulated source in series with a resistor of from 100-1K (values from various manufacturers are all over the place).

February 10th, 2011, 06:58 PM
Yeah I think I'll have to build one. I didn't see a complete schematic, so not sure how easy it will be for me. I'm really a CS guy and can "read" schematics.