Re: A new pseudo-disk for Apple 2.

["mdj" <mdj.mdj@gmail.com>]

Alex Freed wrote:

> There may be a middle ground: a single button connected to the board that
> will generate an NMI.
> No need to mess with the keyboard connector. The problem is the need to
> patch the ROMs.
> I believe ProDOS doesn't like that, right?

Hmm, The ROM upgrade is probably the trickiest bit - a simple piece of
hardware plugged into the keyboard to detect for example,
apple-shift-esc would be pretty easy to design.

The button idea is ok too, as all you need is debounce circuitry, so
it's a nice simple way. If the idea gets off the ground I'll consider
contributing a design for the keyboard edition.

As far as I know, there's no ProDOS issues. NMI is not officially used
in the Apple II, except of course for the IIgs

Matt