6 Oct
2001
6 Oct
'01
9:59 a.m.
I don't remember this clearly at all, but I seem to remember a part from Intel
that did have the same pinout as the WD1771. Apparently that wasn't it.
Dick
----- Original Message -----
From: "Tony Duell" <ard(a)p850ug1.demon.co.uk>
To: <classiccmp(a)classiccmp.org>
Sent: Saturday, October 06, 2001 2:18 PM
Subject: Re: 6502 BASIC or Assembler and Intel 8271/WDC 1770 info req'd
If
only thing you
have to do is handle the clock differences for 8", 5-/4", and
3-1/2" drives. IF you leave the 8" drives out of the equation, and I see no
reason to include them, it should be dirt-simple.
8" drives are no problem. It's the same data rate (and thus clock Xtal)
as the HD modes for 5.25" and 3.5" drives. The only time you have to use
the second Xtal is if you use a HD 5.25" drive and want to be able to
read normal density disks in it.
>
> I may be confused about this, but wasn't the 8271 just a rebadged WD1771?
They seem to be totally different devices. OK, they're both disk
controllers, and they're both single-density only, but there the
similarlity ends...
-tony