Hi, The author of this project http://www.pdp11gy.com <http://www.pdp11gy.com/doneE.html> built a wire-wrapped board to interface an RL02 controller (RL11, RLV21, or RL8A) and an FPGA development board (which does all the heavy lifting for the disk emulation).
I decided to build one of these emulators and to design a printed circuit board rather than using wire wrap. The schematics and layout of my RL02 interface board can be found here: http://sierracircuitdesign.ddns.net/temp/RL02 I made changes to the original design (e.g. I used different driver and receiver chips) but I think it should be plug compatible with the original wire-wrapped design. Feedback on this project is most welcome. Regards, Scott