28 Jan
2012
28 Jan
'12
4:26 p.m.
What I
said--the Superbrain tends (evidently, not all revisions do)
to use FA as a DAM. Either edit the raw track to use FBs or use a WD
17xx controller to get the data and rewrite your disk using FBs on a
NEC 765-type controller.
The Superbrain doesn't care which are used.
It's not rocket science.
"rocket science" is a lot easier than Superbrain! > Didn't I say the same thing TWO DAYS ago? I
even offered to ship
> a copy of the modified image to the OP and got no response.
> Or is it that people don't know what "DAM" stands for?
> Give me a clue, folks.
I wasn't subscribed to the list two days ago (I got resubscribed in
less than a day - Kudos to Jay and helpers for getting this working
so smoothly) - but I happened to see Chucks comments about address
marks, and that along with a recent conversation with the guy who
donated the Compustar where he mentioned that he had no trouble reading
the disks with linux DD got me thinking, so I did some tests with the
Compustar disks which led to a solution (thanks Chuck).
MOST don't know what it stands for, nor the issues
involved in
non-standard ones. Remember how the discussion got side-tracked
into an assumption that the inverted data was the problem?
That came from my original email to the guy who asked for disk images.
I hadn't visited SuperBrain for a LONG time (at least 5 years), and
didn't remember what exactly was non-standard, only that I had not
been able to read them - I did recall that the data was inverted, and
had the thought that *everything* was inverted (including header data)
... obviously with only the data field inverted, data is data ... so
any pattern would be perfectly valid.
Anyway, FWIW .. some more good came from this. Got me back into
fooling with the Brains, so today I took the time to repair my
Compustar. It's good to have them both going again.
--
dave12 (at) Dave Dunfield
dunfield Firmware development services & tools: www.dunfield.com
(dot) com Classic computers: http://www.classiccmp.org/dunfield/