----- Original Message ----- From: "Allison" <ajp166 at verizon.net> To: "General Discussion: On-Topic Posts Only" <cctech at classiccmp.org> Sent: Thursday, May 17, 2012 12:54 Subject: Re: Kaypro (was H720F psu) Hi, Allison: Thanks for the response! Got my first comp. in '83, because I wanted to know, what the hysteria was all about. A K-II set me back over two grand by the time I got it through Customs. The printer, a C-ITOH 40 daisywheel, took another 1500 bucks. Later, I added a ramdisk, too. Actually, I wanted something to play with and get me clued in on this then new-fangled stuff, but with this much invested, I chickened out and left the cover on - most of the time. Working lots of overtime left little opportunity to put fingers on more than the keyboard. So, time went by and computers became something completely different, without my keeping track of it. When the old ones became cheap, I bought a K-2x, K-4, and three K-10s, one of which I still use. The other day, its floppy drive packed it in and I hunted for a replacement. Found a K-4 in London and bought it for 100.-. Took a drive from it and saved the life of my K-10. Now, I would like to educate myself, to try and repair some of the dozen 5.25" floppy drives lying around here. Unfortunately, I have not had any success, finding schematics and manuals for these old drives. Perhaps, I have not looked in the right places. A person I talked to, suggested using a 3.5" drive instead. Now I wonder what would need to be done, to make that work. Another side of my curiosity concerns CP/M. I have early looked at it with ZESOURCE.COM, but predictably got to be none the smarter for it. Yes, it's in three parts: BDOS, BIOS and CCP; but, so what? I'd like to see a listing with explanatory comments, to see what code sequence does what and, preferrably, how. Perhaps that is asking too much. Got the K. "Technical Manual" from Stafford, back in '96 and the schematics from Cornucopia. So much for now, maybe we can get a conversation going, if you can spare the time and consider it worth the effort. Armin.