Re: Questions about IWM

["Michael J. Mahon" <mjmahon@aol.com>]

Matthew Russotto wrote:
> In article <44393789$0$11072$9b4e6d93@newsread4.arcor-online.net>,
> Linards Ticmanis  <ticmanis@gmx.de> wrote:
>
> > PZ wrote:
> >
> > > The IWM Disk II was never released because the original Disk II
> > > controller was simply cheaper to produce at the time.  I believe that
> > > the Apple Universal Controller likewise was never released, however
> > > more might have gotten out than the IWM Disk II.
> >
> > One Question remains, would the Universal Contoller be easier to clone 
> > than a Superdrive card? I'm talking about a quantity of one and 
> > wire-wrapping, not about a production run.
> >
> > IWM chips should be not too hard to obtain from some old Mac corpse, 
> > right? Does the card contain other hard-to-get custom chips as well?
>
>
> Looks like it's an IWM, a 74LS245 (octal buffer), and a "6309".  I
> assume that's not the Hitachi CPU but a PROM.  Not much to it, then.

That seems right, since the IWM was pretty much the Woz Disk ][
controller without the boot ROM.  ;-)

-michael

Music synthesis for 8-bit Apple II's!
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