Re: Problems! Disk ][ drive just whirs and whirs; IIc monitor knob stuck; IIe enhanced not...

[dempson@actrix.gen.nz (David Empson)]

Gregory Weston <uce@splook.com> wrote:

> In article <stedman-D71606.07532029042007@news-server.stny.rr.com>,
>  Larry Stedman <stedman@binghamton.edu> wrote:
> > 
> > Is there an easy way to tell if these unenhanced have the 65C02 and/or
> > the newer character generator ROM?    IIRC, one can run certain programs
> > that use MouseText to check the character stuff.
> 
> Not sure about the queickestway to check the CPU.
> 
> For the ROM, check address fbc0 (64448). On an original //e it's $EA and
> on an enhanced it's $E0, and that's the Apple-recommended way to tell
> the difference in code between those two machines specifically so it had
> better be reliable.

In software, yes. For a human, looking at the title on the startup
screen is much easier: "Apple ][" for an original IIe, "Apple //e" for
an enhanced IIe.

-- 
David Empson
dempson@actrix.gen.nz