So I have an MSV11-QC (the 4gb Q Bus memory board) that has a failed
bit. On an 11/73 it throws the following error:
Expected data = 125252 (1010 1010 1010 1010
Bad data = 121252 (1010 0010 1010 1010)
Address = 10015140
Which puts the error in the top 2mb (1mw), bit 4000. No biggie,
consulting the matrix at:
Shows this to be bank 4, bit 4000 or E85.
Cut out E85, popped the board in (to double check before replacing) and
I see this:
Expected data = 125252
Bad data = 121252
Address = 02015140
Ooops. That would be decimal 531,040 which puts it in bank 1? Which
should be E88, where did I go wrong here?
Or is the table for the MSV11-Q only valid for the 64k ones and not the
256k ones? If so the bits may be right, but the banks are different.
Anyone want to cross-check this or my maths?