Since a few days, my EXORciser Development System is finally able to boot from floppy
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
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
mentioned some interesting
has some manuals, Bitsaver does not have manuals about the M6800
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