The BA23 normally arrives (i.e. has as standard
hardware) a
distribution panel for the RX50 dual floppy drive and RD5n hard drives.
A 50 pin flat cable with a female header at both ends is used to
connect the controller (RQDX3 in your case) to this distribution
panel. The distribution panel has a 40 pin connection available
in approximately the centre (although only the connection headers
are visible through holes in the bulkhead between the distribution
panel and the area which holds the floppy and / or hard drives).
The cable to be used is a 40 pin cable with a female header at both
ends and usually about 10" in length (when used in a BA23).
Any other questions?
Brilliant as usual, Jerome, thanks! With this info, part numbers
aren't necessary.
The distribution panel you're referring to is an M9058? Or is there a
non-backplane variant I haven't encountered yet?
De