I have read on mailing list the your message that
speaks about floppy dis=
k=20
and controller :
>Read/Write
>signals,
>normally using a 26LS31 driver and 26LS32 receiver.
You've trimmed it rather a lot, but that certainly refers to the
ST506-type hard disk interface. The standard floppy interface is all
TTL-level signals.
But in a sense they're analogue in _time_. In
write mode, the >drive
writes a flux transition to the disk for every pulse on the >write data
line. In read mode, the drive sends a pulse on the read data >line for
every flux transition on the disk. There are some restrictions >on
allowable frequencies of transisitions, of course.
etc. etc.
I am looking for documentation on the floppy disk interface.I would like=
=20
to use a floppy disk in order to save data but I don't know how format=20
them. Can you help me?
Well, yes, I do have the specs of the standard floppy drive interface
(pinouts, signals, etc), as do many other people here. However, I am not
sure that's what you need.
One thing before I go any further. Unless you're trying to do something
strange (which normally means 'trying to read a {GCR | M2FM | ...} disk')
then I would strongly recomend you use a standard floppy disk controller
IC. If you follow the application circuit for such a chip and wire up the
floppy drive as is shown in said application, then it should all work.
-tony