From mboxrd@z Thu Jan 1 00:00:00 1970 From: cdl@mpl.ucsd.edu (Carl Lowenstein) Date: Fri, 12 Dec 2003 14:49:51 -0800 (PST) Subject: [pups] pdp11/73 memory Message-ID: <200312122249.hBCMnpo23276@opihi.ucsd.edu> > From: "Christos Papachristou" > To: > Date: Fri, 12 Dec 2003 18:31:12 +0200 > Subject: [pups] pdp11/73 memory > > I recently found a cabinet with a MicroVAX II (in 2 BA23 enclosures) and > quite a lot storage devices on it. I plan to replace the MicroVAX II CPU > module (M7606-AA) with a pdp11/73 CPU module (M8192) . I only have a > 512k RAM module (M8067LA) for the pdp11/73 . The microVAX has two quad > height memory modules , but I haven't checked yet whether they are 1, 2 > ,4 or 8 megs each (ie M7607,M7608 or M7609) .Is it possible to keep some > of the MicroVAX memory modules if they are below or equal to 4 megs? No. MicroVAX memory uses a different interconnect scheme. It is not in the Qbus address space. carl -- carl lowenstein marine physical lab u.c. san diego clowenst at ucsd.edu