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| # 6x0x IO mezzanine construction notes Page history last edited by Nik Brisevac 4 years, 3 months ago Here are the patches: " I did some checking here and noticed that a couple of traces were dropped. You'll need to add a jumper on the back of the PCB between pin 1 of K2 and pin 3 if U1. Also a jumper between pin 4 of U1 and R14 pull up resistor on the pin not connected to VCC. I am not sure why those traces were missed but it is an easy fix. Installed a jumper at K2 between pins 1 and 2 to connect the output of the PTM (O1) to the /NMI line via the U1 inverter. " Dan Also a jumper is needed between pin 1 and 9 on the 6551 to correct CTS issue between PC serial and I/O mezzanine. Need to add jumper for reset if backplane is being used. Nik # 6x0x IO mezzanine construction notes
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