I reconnected the data bus pins, and disconnected all the MA0..11 pins (in
case it's DMAing into memory when it should not be). Nope, same issue. Won't
boot Serial Disk, corrupts the upper six bits of the loader.
Only bus left is the memory data MD0..11, but that can't be shorted because
on t
I still can't get my RL8A (M8433 RL01/02 disk controller card) working again
in my 8/A system. It won't boot from the RL02 any more.
In my backplane I found it to be mechanically sensitive (AJRLAC diskless
controller test would show errors always involving bits 4-7 being
unexpectedly 0's), and
