Well, I have decided to stop playing with my hardware for a while and get back to playing with software. :-) In order to do this I am building three (maybe four) PDP-11's. I have an 11/93, an 11/73 and an 11/23+ (and maybe another 11/23 or 11/73). BUt, I have run into a small problem. Memory. (both the systems and me!) My 11/93 has 2 meg internal and I would like to bring it up to 4 meg. The others I would like to see with 4 meg if possible. (except the last one which I may deliberately keep at 128KW.) I have a number of different memory modules. Mostly DEC but a couple third party. Here's the problem. None of them are reflected in any of the documentation I have been able to find so I can't configure them away from their defaults! Here's a list of numbers: M7551-AC - All the docs I can find seem to refer to AA or AB and jumpers and switches are not in the same locations. M8067-LB M8067-LF M8067-LJ - Same problem. I can find no documentation for any -L boards and these don't even resemble the pictures I find. And then I have two non-DEC module that are unlikely to have any documentation still floating around for. Camintonn CMV-1000 -- As funny as it sounds, this one looks more like a DEC MSV11-QA then the DEC ones do, but not exactly. And one who's maker is only identified by a logo that looks like 2 interlaced stylized S's. Model Number is: 980110014-201 Rev E. Anybody got any pointers to help me configure some of this stuff? bill