28 Oct
2002
28 Oct
'02
7:06 p.m.
> modifications were not very rare. For example,
the Apple][ used an SA390,
> which was the SA400 with different board. Some peddlers of aftermarket
On
Mon, 28 Oct 2002, Tony Duell wrote:
I always believed that the circuit board on an Apple
Disk II was an Apple
desting. Are you saying it was actually a standard one, used by other
companies too?
Correction to my previous post: the SA390 appears to be an SA400 WITHOUT
a board, to which other companies (Apple, etc.) added their own board.
The real Disk II has a single 20 pin header for both
power and signals.
There's +12V on at least one of the pins, and if you mis-mate the
connector, it ends up connected to a TTL input. Great!
The original post on this thread mentioned not having a "standard" floppy
power connector (Molex), and not knowing the pinout of the
connector(s). Could it be that his SA400 is an aftermarket drive for
Apple (or something else), where the Shugart board was replaced by
something weirder?