19 Feb
2019
19 Feb
'19
10:54 a.m.
On 2/19/19 8:48 AM, Anders Nelson via cctalk wrote:
Hi friends,
Now that I have my glorious disk toaster (2D model I think, says "2D" on
the drive levers), I want to build a controller for it. I found pinouts and
some description of the media organization here:
http://bitsavers.trailing-edge.com/pdf/ibm/6580_Displaywriter/S241-6248-3_D…
I'd like to actually store data to these disks in the same manner the
original systems did, and I'm proficient in hardware/firmware. Has anyone
made a controller for this already? How about emulating the filesystem?
Any help is appreciated, and I'd open-source whatever I make (PCBs,
firmware, etc.).
Are you talking about the disk unit for the Displaywriter (6580)?
Those don't use what you'd call a general-purpose filesystem in their
native mode (although there was a version of CP/M 86). The DW
filesystem is very specific to that word-processing application and
probably not useful for general-purpose applications. And, of course,
the character code used is EBCDIC.
--Chuck