Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!lll-winken!lll-lcc!pyramid!athertn!paul
From: paul@athertn.Atherton.COM (Paul Sander)
Newsgroups: comp.sys.apple
Subject: Re: Rom Copyrights
Summary: I've used EPROMS
Message-ID: <2181@athertn.Atherton.COM>
Date: 2 May 89 00:26:57 GMT
References: <2596@ndsuvax.UUCP>
Organization: Atherton Technology, Sunnyvale, CA
Lines: 28

In article <2596@ndsuvax.UUCP>, nubartho@ndsuvax.UUCP (Bruce Bartholomew) writes:
>   I am really curious as to how one could justify copying the ][+ roms
> when they appear to be of a non-standard layout.  I remeber attempting
> some permanent changes to the rom set (using eroms) and coujld never get
> the ][+ to read the code that I had installed  on them.
> 
> Now either I was doing something wrong (which was unlikely) or the ROMs were
> of a propietary nature.  I think this is a viable solution to deter people
> from making backups.

Apple's ROM pinout (for the ][ and ][ Plus) is in fact nonstandard, and 
EPROMs cannot be plugged straight into the motherboard and be expected to
work.  I was able to modify the Applesoft ROM code and burn the result 
into EPROM, and then plug the EPROM into a jig that was in turn plugged into 
a stock Apple ][ Plus.

Before anyone gets on my case about copying copyrighted software, let me
say that I made changes to the code for a specific reason (defeating the
output formatting while printing listings) for my own personal use.  These
chips were never used anywhere but inside my machine.

The jig consisted of a hacked up "Socket-2-Me" from Skyles Electric Works.
This is a PC board that allows two ROMs to be installed in one motherboard
socket, and provides a mechanical switch to select one of the ROMs.
-- 
Paul Sander        (408) 734-9822       | Do YOU get nervous when a
paul@Atherton.COM                       | sys{op,adm,prg,engr} says
{decwrl,sun,hplabs!hpda}!athertn!paul   | "oops..." ?