Total congratulations On Tue, Jun 5, 2018, 2:10 PM Thomas B via cctech <cct...@classiccmp.org> wrote:
> Since a few days, my EXORciser Development System is finally able to boot > from floppy diskettes. > > Previous attempts have shown that the Motorola EXORciser M68SFDC1 floppy > disk board used has a special modified ROM version. This was probably > written for an 8-inch drive, in which the Write protect and Direction > signal were inverted. > For the sake of simplicity, I have used free inverter on the board to > invert the signals accordingly. > After adjusting the PLL frequency, reads and writes from the card are now > error-free. And all without FDC, only clever programming by Motorola > software engineers in the early 76’ > > Originally, the EXORdisk system was a dual drive with two 8 "units. This I > have replaced with a double drive of two 5.25 inch units. An Epson and a > TEAC, which can be jumpered to 360 rpm. Luckily, 2HD floppy disks are easy > to R&W. > I also got a GOTEK floppy emulator running, which I can boot from. Thanks > to Roland Huisman, Bitsaver has some interesting floppy disks that convert > to HFE format work perfectly. This format makes the Gotek drive most > reliable. > > Now to my question. The vintage computer forum at > http://www.vcfed.org/forum/archive/index.php/t-44638.html mentioned some > interesting manuals. Archive.org has some manuals, Bitsaver does not have > manuals about the M6800 development system. > If someone already owns scanned manuals to the following list > > M6800 Basic Interpreter Reference Manual > M6800 Macro Assembler reference Manual > M68SFDU Exordisk 11/111 Disk `Drive Unit Maintenance Manual > M6800 Exorciser 11 User's Guide > M6800 Exorciser User's Guide > MEX68PP1 PROM Programmer Module Supplement M6800 Exorciser User's Guide > > I would welcome any feedback or questions > > --THOMAS > >
