"Curt Vendel" <curt(a)atari-history.com> wrote: (Re: Corvus floppy disk controllers) Take a look at: http://www.reanimators.org/tmp/corvus-fdc.d300.tiff http://www.reanimators.org/tmp/corvus-fdc.d600.tiff Both are TIFF class F group 4 scans, one is at 300 DPI, one is at 600 DPI. The "original" that I have is a crappy photocopy so, well, good luck reading them. I'll talk to Al and see if he wants to adopt these or point me to a better scan. The 8" floppy controller also has a space on the board for a 34-pin connector, but it's not stuffed. I got this controller and schematic from an advertisement in Computer Shopper in the mid-to-late 1980s, offering an 8" floppy controller for the Apple ][. Sadly, at the time I didn't have a WDC 1793 data sheet so my efforts at programming the thing were frustrated and I got distracted by other things. Then there's the 5.25" floppy drive. I got that out too and had a look at it. The drive is a Corvus model FLP-5, Rev C, s/n 404-G1018-. It's a metal upright case screwed together and to a half-height 5.25" floppy drive, in this case a TEC FB504 (which is a double-sided "quad density" 720KB drive, so I'm guessing 96 tracks per inch) strapped for DS0 and with terminating resistor pack installed. The 5.25" drive is connected to a different controller. The silkscreen on the board calls it a "BUFFERED FLOPPY CONTROLLER", and there's a handwritten part number, "8010-10149 REV A". It's laid out differently and is clearly a different design: it's got a NEC D765AC FDC, and also has a power connector through which the controller card supplies power to the drive; the power cable and a 34-pin flat cable are bundled together in a sort of plastic zip-lock wrapper. I've no idea what this 5.25" drive was used with. Along about 1996 there were some cleanouts of cupboards and storage rooms at The Wollongong Group (where I worked at the time), and there was this drive and controller (which I got) and a Corvus hard disk (which I didn't get). I didn't see a Concept there. I do know that several folks came from Corvus to Wollongong in the mid-1980s (before I got there) and guess that they brought this stuff with them. -Frank McConnell