PDP 11/70s For Sale

From: Daniel T. Burrows <danburrows_at_mindspring.com>
Date: Fri Sep 24 05:58:06 1999

>> An 11/53 thats a 11/23 cpu in a BA23 box.
>
>Huh? Is the CPU chip on an 11/53 card an F-11? If so, is it the same
>speed as an 11/23? I have 11/23 dual-height CPUs, 11/23+ quad-height
>CPUs, but no 11/53 (nor 11/73) CPUs. I did see one about 11 years ago


There are 2 basic versions of the 11/53 CPU. They both have 2 serial ports.
1 has 1/2 meg on board the other has 1.5 meg on board. They are both
available with Sbox handles for use in BA213's. If you are looking for one
keep your eyes open for DECserver 500 and 550's. The 500's use the 1/2 meg
version and the 550's use the 1.5 meg. There is some difference in the
firmware used on the DECserver CPU's from the usual PDP11/53 but I have
never taken the time to play with them. I just put in the PDP11 firmware
and run them.

Dan
Received on Fri Sep 24 1999 - 05:58:06 BST