Building a New-to-Me PDP 11/23

[Bitly]

What is an 11/23S? Google doesn't seem to know it exists.

The Microsystems Handbook has information on the 11/23SV in appendix F. Same thing perhaps?

Edit: The 1979 Microcomputer Processor Handbook has a 11/03-S (small system) listed, apparently the S indicates a 4 slot backplane.

CW

 

[vrs42]

For some reason, the spacing on the clips in my BA11-N chassis is different from that in your PDP-8/A. The card guides themselves would work perfectly, but the clips are in rather different locations.

For some reason I seem to be just noticing your reply.

The spacing of the barbs does need to very depending on the chassis they are used in. Yours are just a little too high on the bottom to fit into my off-brand PDP-11 chassis, for example.

I also decided that it is just too difficult to print that general design and have the result be robust. What I've gone with instead is this one:

https://svn.so-much-stuff.com/svn/trunk/3D/CardGuide/8AGuide2.jpg

https://svn.so-much-stuff.com/svn/trunk/3D/CardGuide/8AGuide2.3mf

https://svn.so-much-stuff.com/svn/trunk/3D/CardGuide/8AGuide2-mm.stl

Which can be printed robustly with minimal support. You'll need three (one for each row of clip holes) for every four slots, but it doesn't matter how far apart the holes are, as long as the gap between the cards is the standard 1/2 inch.

 

[czunit]

Neat little system. The only issue with the BA11M is that it was an 18 bit bus, so no more than 256kb of memory. Still smaller than the 22 bit BA11-SA