Re: Apple Drive III cable

[Jon O'Brien <jobrien@ais.net>]

> I'll have to dig up my Apple /// notes for full information, but the drive
> ribbon cables daisy chain. There are four drive select signals, and each
> drive shifts them over by one, so the drive automatically are assigned
> numbers. I believe there is a slight difference between the internal drive
> wiring and the external drives, since the internal is always .D1. Note
> that you can use /// drives on a ][, and vice-versa, with appropriate
> cabling. I'll try to dig out all my /// stuff after I move (and can
> finally set my Apple collection back up again)

Are you sure you can mix and match drives between Apple IIs?  There's a big warning label on the 
back of my Disk III telling users *not* to do this.

As for the drive signal, the analog board of the internal drive has to do something to that extra 
port on the back if the .d2-.d4 port on the back is simply daisychained to the internal drive.  
How else would that port not work?  At least that's my theory (not all that educated of one, 
though).

Jon