marcopolo
Experienced Member
For a 6U backplane, I believe passive terminator current is about 1A so 6 ohms seems normal
VCF West | Aug 01 - 02 2025, | CHM, Mountain View, CA |
VCF Midwest | Sep 13 - 14 2025, | Schaumburg, IL |
VCF Montreal | Jan 24 - 25, 2026, | RMC Saint Jean, Montreal, Canada |
VCF SoCal | Feb 14 - 15, 2026, | Hotel Fera, Orange CA |
VCF Southwest | May 29 - 31, 2026, | Westin Dallas Fort Worth Airport |
VCF Southeast | June, 2026 | Atlanta, GA |
With a great deal of assistance from Marc, the M68VECPU100 system is now running. Remarkably the Intel 2532 EPROMs have survived over 40 years!Found enough parts to cobble up an adapter. I've dumped two chips, will do others tomorrow - too tired now.
Read at 5V and verified at 5, 4.75 and 4.5.
Some of the AM2732A I tested today started to show about a dozen fails below 5V verify, these were out of a similar age Apple I/O board