31 Dec
2007
31 Dec
'07
8:23 a.m.
From: ard at p850ug1.demon.co.uk
Hi Tony
I have the same question. The ST506 and ST412 were different
in the WrPrecomp signal being changed to a head select for
the ST412. I think he is looking at documents that state that he
needs a ST506/412 interface. This would be compatable with
just about any MFM drive made after the ST412.
There was a signal on some drives that came on the data cable.
I think it may have been a write protect but I don't recall
exactly what it was. The ST506 may have used this signal.
I'm not sure if this is what he is talking about.
I'd suspect things like step rate and number of heads would
be more important to him than anything else.
Dwight
_________________________________________________________________
The best games are on Xbox 360. Click here for a special offer on an Xbox 360 Console.
http://www.xbox.com/en-US/hardware/wheretobuy/
Hi,
I am restoring a Vector Graphic computer and would like to add a hard
disk drive. The controller only supports two kinds of hard disk
drives, the ST506 and ST412. The HD controller is hard coded to
support these DRIVES not just a compatible interface and relies on a
special signal present only in these actual drives.
What signal is that? I've looked at the schematics for thsoe (although
not recently) and I can't remember any extra signals on the connector.
Can this signal, if it exiasts, not be 'faked' on some other drive?