Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!thunder.mcrcim.mcgill.edu!snorkelwacker.mit.edu!apple!stadler
From: stadler@Apple.COM (Andy Stadler)
Newsgroups: comp.sys.apple2
Subject: Re: Would you believe?
Keywords: hd, rom 3, hard drives
Message-ID: <54087@apple.Apple.COM>
Date: 17 Jun 91 20:46:16 GMT
References: <1991Jun16.120626.15116@cunixf.cc.columbia.edu>
Organization: Apple Computer Inc., Cupertino, CA
Lines: 31

In article <1991Jun16.120626.15116@cunixf.cc.columbia.edu>
 stc7@cunixb.cc.columbia.edu (Steven T Chiang) writes:
>
>2)  How to achieve Rom 03 compatibility, on a Rom 01.
>
> [Steven describes placing 1/2 of the ROM 03 set into the motherboard,
>  and the other ROM chip into one of the sockets on a GSRam Ultra]
>

Just a quick plug for the legal department - please, folks, remember that
Apple's ROM chips contain copyrighted code and they are not for sale.  There
are a lot of people on this board (correctly) advocating an end to piracy,
recognizing the damage it's done to the software industry.  Let's not take a
step backwards on this.  ROM's are programs too.

>	Anyway, I tested out the CPU... and didn't have any problems.

Actually, it's not so simple.  When we developed the ROM 03, we started out
doing exactly what you describe - one ROM in the motherboard, and the other
ROM on a special RAM/ROM card we built a few of internally.  This configuration
works OK in the 16-bit world, but there are problems, especially in the 8-bit
world, which you touched upon when you mentioned sticky keys.  The keyboard/
mouse/ADB controller was redesigned for the 1 Megabyte motherboard, and the
ROM 03 knows about that.  You may have some glitchy jumpy cursor problems,
and some 8-bit software may be very difficult to control.

In short, for both legal and technical reasons, I cannot recommend placing
ROM 03 chips in a ROM 01 motherboard.

Andy Stadler
Apple Computer, Inc.