Re: Apple //c displays black and white stripes

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

David Wilson wrote:
> On Apr 27, 10:44 am, "Matt J. McCullar" <mccul...@flash.net> wrote:
>
> > The Apple //c has a built-in self test.
>
>
> True except for the original 16KB ROM (ROM 255) which does not have
> the space.
>
>
> > Try holding down these keys on the keyboard:
> > Open Apple -- Close Apple -- Control -- Esc
>
>
> I don't recall needing to press ESC and you have to reset the machine
> so I would press Ctrl+Open Apple+Closed Apple+Reset and then release
> either Ctrl or Reset (keep the Apple keys depressed until the self-
> test starts).
>
> Of course if the main RAM is faulty the system may not even be able to
> run the self-test (the 2nd instruction after a RESET is a JSR so the
> stack needs to work if the rest of the reset code is to function).

Have we even established that the machine beeps when turned on?

-michael

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