Hi, Allison.
I'm perplexed. The RQDXn controllers are MFM and Floppy. Best shot
is late firmware RQDX3 as it does RX33 and most all
MFM drives. Its
also easier to find.
At least as I can remember, the RQDx3 needs an internal distribution panel.
I'm searching for ONE single board.
Thanks and Greetings
Sergio