Re: Apple II Disk Controller

["Michael J. Mahon" <mjmahon@worldnet.att.net>]

Tim Shoppa wrote:
> 
> In article <33564CBE.446B9B3D@oakhill-csic.sps.mot.com>,
> Jeff Hunsinger  <jeffh@oakhill-csic.sps.mot.com> wrote:
>
> >Is there any good documentation on the web describing the details of
> >the Apple II disk controller? I know Woz considered it one of his
> >favorite designs and that it was extremely simple, but I haven't seen
> >any schematics or circuit descriptions.
> 
> All of the Disk ]['s I ever bought came with a schematic for both
> the controller and the drive.  In particular, check the first
> spiral-bound editions of the DOS 3.2 and DOS 3.3 manuals you might
> have.
> 
> Of course, the Disk ][ controller is a state machine with the bipolar
> PROM's programming determining just about everything, so you need more
> than a schematic.  I highly recommend you get a copy of "Beneath Apple
> DOS", by Worth and Lechner, from Quality Computers.  It contains
> a wonderful explanation of how the hardware and software work > together.
> 
> Tim. (shoppa@triumf.ca)

And if you _really_ want to understand this beautiful state-machine
data separator, read Jim Sather's _excellent_ book "Understanding
the Apple II" or "...the Apple IIe"--these volumes are still avail-
able and you'll *love* either one!

-- 
-michael

     Email:  mjmahon@aol.com
 Home page:  http://members.aol.com/MJMahon/