Some PDP11 related Questions..

On Wed, Jan 25, 2012 at 11:08 AM, Holm Tiffe <holm at freibergnet.de> wrote: You can't use the VAX memory with the PDP-11 For reference: EK-KDJ1B-UG-001 KDJ11-B CPU Module User's Guide http://www.bitsavers.org/pdf/dec/pdp11/1173/EK-KDJ1B-UG_KDJ11-B_Nov86.pdf 1.6 PRIVATE MEMORY INTERCONNECT The PMI is a unique Q22-Bus protocol that provides a high performance data path between the KDJ11-B module and the MSV11-J memory modules. These modules comprise the private memory and interface with the KDJ11-B via a backplane structure that uses the Q22-Bus as the A/B slots and an interconnecting interface as the C/D slots. This backplane structure allows data and address information to be multiplexed and transmitted via the Q22-Bus BDAL <21:0> data/address lines, while the PMI protocol non-multiplexed control lines use the C/D interconnecting interface. The PMI protocol functions in a Unibus system by using the KTJ11-B Unibus adapter module designed to interface with a PMI system. The PMI interface consists of 14 control signals used on the C/D interface, 6 Q22-Bus control signals, the bank 7 select signal (BBS7) and the 22 data/address lines (BDAL <22:0>). A complete description of the PMI operation is provided in Chapter 7. EK-MSV1J-UG-001 MSV11-J MOS Memory User's Guide http://www.bitsavers.org/pdf/dec/qbus/EK-MSV1J-UG_001_May85.pdf