29 Apr
2011
29 Apr
'11
7:52 p.m.
On 30/04/11 02:29, Chuck Guzis wrote:
On 30 Apr 2011 at 1:09, Philip Pemberton wrote:
18/256 looks more likely.
The head-zero tracks all have far more than 9 sectors on them. With so
many sectors it's hard to tell, but 18 seems plausible based on the
inter-sector gaps.
Those 9/512 sectors look suspiciously like DOS 360K tracks... though
what I don't get is why every track is formatted like that. DOS 360K is
only 40 tracks. Unless it was read in a 40-track drive..?
What a cock-up. My face is red! (though probably more because my desk
fan's packed in, and it's like an oven in here!)
At least it's not as "strange and unusual" as the Durango F-85 format.
GCR, 12 sectors (or it *looks* like 12 sectors at least)... Without a
GCR code table, I probably won't get far with that one...
--
Phil.
classiccmp at philpem.me.uk
http://www.philpem.me.uk/
Hmm. I've got it listed as "TRS-80 Model
4P" in my catalogue. Maybe I
need to feed it through one of the decoders and see what happens...
Well, there *was* a Mod 4 CP/M format that was 8 sectors of 512
bytes, but no 9 AFAIK.