From: Noel Chiappa Sent: Wednesday, October 19, 2016 8:49 AM >> From: Rich Alderson
>> Yes, the d/r card is strictly level conversion, and the microcode in >> the Xilinx does all the Massbus protocol. > So if you don't mind continuing to indulge my curiousity (thanks for all > the indulgence so far :-), is the D/R card a daughtercard that mounts on > the Mesa (my guess)? Actually, due to the board real estate required for all those transceiver chips, we couldn't make it all fit on a card that fit inside a PC. There is a separate box with the Massbus connector on one side and ribbon cables going to the server on the other. Rich Rich Alderson Vintage Computing Sr. Systems Engineer Living Computer Museum 2245 1st Avenue S Seattle, WA 98134 mailto:ri...@livingcomputermuseum.org http://www.LivingComputerMuseum.org/