dan@n44a.UUCP (06/14/83)
PDT-11's were DEC's early attempts towards office automation with local clustered processors. There were three PDT-11's: 110, 130 and 150. The PDT-130 has a LSI11 chip set (no EIS/FIS) together with up to 30k words of memory (probably what was meant by 64k (bytes)) and a (parallel) TU58, all packaged in a VT100. It also had the options of up to 3 additional serial interfaces plus a printer port. It had no Qbus and no further expansion capabilities. So the idea was to run up to four terminals and a printer off one PDT-130 cluster. The PDT-110 is a 130 without the TU58's. It had no mass storage and was meant to accept programs downloaded from a host. The PDT-150 is a 130 without the VT-100 and the TU58's, but with dual floppy disk drives. Both the 130 and 150 (the TU58 and floppy) ran I/O off a serial protocol (similar to real TU58's). RT11 V4 supported PDT 130 and 150's. You can actually run RT-11 with the KED screen editor off a PDT-130. The price of $2200 for a PDT is not a good one. You should be able to get one (130 or 150) for $1300. (Try Newman computer). With the PDT-130, you can strip out the PDT stuff and turn it to a regular VT-100, or a simple program can be written for the PDT-130 to act like a VT-100. Dan Ts'o ...decvax!cca!ima!n44a!dan ...wjh12!n44a!dan