Thats good then...Forgottenmyname wrote: ↑Thu Sep 20, 2018 6:34 pm My PSU needed a quick tweak, was running at 4.93 between 7 and 14 of the LS11 which was the same value on the floppy power connector
I would check resistance of the whole address and databus (power off of course) Each resistor pack pin to 5V and make sure you have 2.2K on each one..
The address bus resistor packs 4,6,8..
Databus packs 2,3.
Also check
/AS on GLUE (pin 34)..
UDS (pin 47)
LDS (pin 46)
R/W (pin 55)
Also check those pins with power on (voltage scope) see what they are doing..