More RT-11 questions

It's possible that HT11 had some slight variation in the directory structure which causes real RT-11 to throw up its hands in disgust. Not so much that there is no software for it, some devices had no capability to format... You cannot format an 8" floppy on an RX01. Even on the RX02, all you can do (with true DEC hardware) is change a single-density RX01 to a double-density RX02 or vice versa. If the disk has no formatting to begin with, RX02s can't help it. The only machine, strangely enough, which could truly format RX01s was the PDT-11/150... It writes the low-level format whenever it writes a block... I had a RX01 attached to one of my file cabinets at work, using a magnet ring from an RK05... but I regularly used it on the PDT just to show people it could be done... BTW - a side effect of this is that only those sectors actually written by the PDT-11/150 will have single-density formatting... if the disk is otherwise a double-density disk, the unwritten sectors remain double-density... strange, eh? typically, MONITR.SYS was RT-11 SJ monitor for RK05 what the bootable monitor was called. RT-11 FB monitor for RX01 RT-11 FB monitor for RK05 SJ/FB RP02/03 disk handler RT-11 SJ monitor for RF11 (fixed head disk) SJ/FB RK05 disk handler RT-11 FB Monitor for RF11 SJ/FB RF11 disk handler RT-11 SJ monitor for RP02/03 SJ/FB TT handler RT-11 FB monitor for RP02/03 SJ/FB Parallel Line printer SJ/FB Dectape (TU56) handler handler SJ/FB Batch handler SJ/FB RX01 disk handler System Macro Library SJ/FB Card reader handler System Macro Library SJ/FB Magtape handler Batch processor SJ/FB Magtape handler Text editor, uses commands SJ/FB Paper tape reader handler kind of like TECO, but different Assembler SJ/FB paper tape punch handler Assembler (?) I never used SJ/FB TU60 cassette handler this one... I've forgotten... SJ/FB RJS04 disk handler Cross-referencer File Exchange utility (knows about RSTS file structure as well as interchange floppies and TOPS-10 volumes. Linker Source file comparison utility Peripheral Interchange Program DUMP utility Utility for patching image Utility for patching object files files 'Octal Debugging Technique' VT11 macro definition file I always had a problem with the name. I always thought it should have been 'Octal Debugging Tool'. VT11 display handler object I don't know... library Demo foreground program, SJ/FB keyboard handler, allowed communicates with... input from keyboard (the way TT handled device output) Demo background program Librarian utility, used to build object libraries This is not a standard RT file... This is not a standard RT file, it may be part of what is executed at boot time...? Thanks for the walk down memory lane... 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 | +--------------------------------+-------------------------------------+