PDT-11/150

It is a PDP-11, using the LSI-11/2 (and 11/03) chip set. It can have up to 60kb of user-available memory, a console line (programmed like a DL), 3 other serial lines, an asynch/sync line and a printer port. The floppy disks are 8" RX01 compatible drives. The interesting thing is that this device can format the disks, not by some special format command procedure... it formats a sector when it writes it... The on-board ROMs know about RT-11 Queue elements, so the RT driver simply calls the ROM to handle the I/O, and the ROM returns if there was an error, or when the request is complete. I don't know of anything else which ever ran on it... (I would be interested to know if there ever was). When you put in a PDT-bootable diskette, you type '@@' (two at-signs) at the console terminal to cause it to boot. I have heard from some that a version with EIS/FIS is called a Mini-Minc... I have several PDTs that I have upgraded myself. Otheriwse, if you locate a EIS/FIS emulator written years ago by Ian Hammond, you can get EIS/FIS programs to run on it. Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+