After a few days of work, I have successfully restored and booted a MicroPDP-11/23+. This is the first PDP-11 that I've actually restored, and one of four that I want to get working this summer. This is also only the second PDP-11 that I've even *used*. Here's what the cards look like: Backplane: H9278-A (3xQ22/CD 5xQ22/Q22) AAAAAAAAAA BBBBBBBBBB CCCCCCCCCC DDDDDDDDDD 1 M8189----(KDF11-BF)------------------------ 2 M8067-LB-(MSV11-P)------------------------- 3 M9047---------------- SPACER-CARD---------- 4 M9047---------------- M9047---------------- 5 M9047---------------- M9047---------------- 6 M9047---------------- M9047---------------- 7 M7957----(DZV11-M)------------------------- 8 M8639-YA-(RQDX1)--------------------------- I've got another MSV11-P card that I'll stick in there as soon as I get its jumpers changed. Per Tony's info, I did not remove any grant jumpers on the CPU and memory cards; neither card uses the CD bus, so removal is not necesary. Per Ethan's help, the cards have been reorganized for maximum expansion ease. I did have to replace the power supply and the CPU card. Them's the breaks. It's got RT-11 5.1 and CTS-300 8.1 installed, and it boots. I've got some playing to do! Many thanks go out to: - The people who run documentation websites - Ethan Dicks and Tony Duell for help - Jeffrey Worley for the majority of the parts - Eric Dittman for the BA23 plastic shell -- Jeffrey Sharp The email address lists(a)subatomix.com is for mailing list traffic. Please send off-list mail to roach jay ess ess at wasp subatomix beetle dot com. You may need to remove some bugs first. _______________________________________________ cctech mailing list cctech(a)classiccmp.org http://www.classiccmp.org/mailman/listinfo/cctech