Re: ROM Card question

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

Paul Schlyter <pausch@saaf.se> wrote:

> In article <1f8s7gb.pj3422onzbswN%dempson@actrix.gen.nz>,
> David Empson <dempson@actrix.gen.nz> wrote:
>  
> > There was one other reason: the switch on the card lets the user control
> > whether the motherboard or ROM card gets control at reset time.  This
> > has some useful applications in the hacking vein (the old monitor ROM
> > can be useful as a poor man's cracking card, or you can use custom
> > firmware on the card).
>  
> You don't need a ROM card for THAT!  You can just as well replace the
> motherboard monitor ROM with a ROM which does whatever you want at
> RESET.

Using a ROM card for this means that you can leave the motherboard ROM
alone (running Applesoft and an autostart monitor) and avoid any
compatiblity issues.  The ROM card can be used to reset into the old
monitor ROM on the rare occasions you need to do this, and it avoids
having to change ROMs on the motherboard.

In addition, using EPROMs is difficult on an Apple II+ motherboard, but
much easier on the ROM card.

-- 
David Empson
dempson@actrix.gen.nz