9 Apr
2007
9 Apr
'07
8:29 a.m.
Philip Pemberton wrote:
Yes, I've seen the SA400 manual, and a few of the
Tandon 5.25" drive
manuals. What I haven't seen are any manuals that cover 3.5" drives,
though I suppose 99% of the interfacing stuff is the same.
Yep, it should be the same - although the BBC doesn't use that nasty cable
twist in the drive cable like a PC, so the drive will be jumpered differently
to a PC drive in terms of drive select.
It's probably worth checking what levels pins 2, 4, 6 are at when the drive's
hooked up to the beeb - ISTR these are a bit open to interpretation.
I did want to get a primitive MFM data-separator
working tonight, but
I've spent all afternoon scratching my head over this and come up with
nothing.
I was going to do all that in software - seemed like a lot easier way of doing
it than having two different data streams from the hardware to deal with (MFM
versus "something else").
cheers
Jules