Total congratulations
On Tue, Jun 5, 2018, 2:10 PM Thomas B via cctech <cctech at 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