"Fred N. van Kempen" <waltje(a)pdp11.nl> asks about:
- two Data Systems Design cards.. half-height, some
RAM, some PROMs
and a fair bit of logic. One 16Mhz xtal. One connector (28 pins
or so)
Most likely one of their floppy subsystem controllers, possibly for
a DSD 440. It's software-compatible with an RX02, but you have to have
their drive box as the cable interface isn't compatible with anything
else.