Micropolis 1558 ESDI + RQDX3 ?
No. The cabling looks similar (one wide and one narrow cable)
but they do not work with each other.
If you can find a Webster/Sigma Q-bus ESDI controller, though,
you are in fat city. When I moved off a RQDX3 and onto the ESDI
controller circa 1990, I was so happy.
Emulex ESDI controllers aren't too shabby either. (Although I
far prefer the Websters.)
Tim.