Deciphered the missing keyboard cable and the far, far too complicated keyboard interface (I practically rewired a Cromemco PRI board to be an interface for this lovely Microswitch parallel keyboard -- very hardware-head), soaked & washed the mouse poop off the floppy cable, repaired the section of conductor #50 nibbled by said rodentia, picked a system floppy at random (DSSD), typed "b" at the prompt... READ ERROR. Pulled a SSSD system disk, booted fine! Some fiddling, I can't read any sectors of side 2. That I will figure out. It does figure out sidedness. Found I have bunches of blank NOS DSDD floppies, not one SSSD blank! So no formatting etc. So I ran all the progs on the system disk (wordstar, sid, pmate, stat, etc) OK. Since I've got a bunch of SSSD system disks, I stuck another in the B drive (a sssd drive, since mice ruined the orig. drive), and ran MBASIC 5.03 off it. Man, the B drive spindle bearing is trashed; it's conversation-level loud. The G and right-shift keys on the keyboard don't work, and the RETURN key sends a garbage character then CR (but Control-M works so I can do stuff). I need to fix the "G" key, figure out the serial port stuff, then I can export the SSSD diskette contents. Once I fix the DS thing I'll do the other non 3740 format diskettes. I don't know yet what order I'll do things in though I will probably get one of the serial ports working to make sure. Luckily I have ZAPLOAD (bin to hex) and telink (telecomm) progs on the system disk.