Is The M9312 Boot Module Essential?

That module was specifically called for in the RH11-AB dual-port Unibus-to-MASSBUS interface as the Unibus B terminator. See RH11-AB_OptionDescr.pdf, Section 4.24 (page 4-32/33), which has a fairly lengthy write-up. -----Original Message----- From: cctalk <cctalk-bounces at classiccmp.org> On Behalf Of Mattis Lind via cctalk Sent: Friday, February 25, 2022 2:29 AM To: Noel Chiappa <jnc at mercury.lcs.mit.edu>; General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> Subject: Re: Is The M9312 Boot Module Essential? What about the M9300 board? Do you have an idea what the purpose is of that card? It look a bit like a M9302 but with more logic on it and a few jumpers and a LED. It also have a delay line and a monostable flip-flop. Here is a photo of a (dusty) M9300: http://forum.datormuseum.se/data/B21AEA95-02C2-402B-BC97-06790BAEDC88/84B52… /Mattis