MEM11 Status Update

-----Oorspronkelijk bericht----- From: Noel Chiappa Sent: Tuesday, January 20, 2015 6:04 PM To: cctalk at classiccmp.org Cc: jnc at mercury.lcs.mit.edu Subject: Re: MEM11 Status Update Maybe you're thinking of the RH70, the MASSBUS <-> PDP-11/70 memory bus interface? But there was also the RH11, a MASSBUS <-> UNIBUS interface, which supported all the same devices (RP04-6, etc) as the RH70, but plugged into a UNIBUS. (The two were programming-wise almost identical, the RH70 had an extra register for the extended memory address bits, plus a 'CSR3'.) But I was speaking of the RP11, a UNIBUS interface for the RP03 (different beast from the RH11, although very similar). Noel Ahhh, thanks Noel. My goof up. I associate anything "RP<whatever>" with MASSBUS devices. I even wrote "BUS" with double S. Clearly a case of finger movement on the keyboard before enabled brain activity ;-) I have both RH11 (on my 11/35) and RH70 interfaces on my /70, but I never saw any RPxx drive in real life :-/ - Henk, PA8PDP