Path: utzoo!attcan!uunet!samsung!usc!apple!dlyons
From: dlyons@Apple.COM (David A. Lyons)
Newsgroups: comp.sys.apple2
Subject: Re: Inverse characters
Message-ID: <43258@apple.Apple.COM>
Date: 23 Jul 90 00:44:32 GMT
References: <6487.apple.info@pro-abilink> <1990Jul20.200816.19293@laguna.ccsf.caltech.edu> <1990Jul21.180434.23445@hoss.unl.edu>
Organization: Apple Computer Inc, Cupertino, CA
Lines: 25

In article <1990Jul21.180434.23445@hoss.unl.edu> greg@hoss.unl.edu (Hammer) writes:
>[...] Not all 80 column cards work the same.  At my old high school,
>there were at least three different things you had to try to get some
>things to work, since not all of the IIe's had the same card, and not all
>of them were the same model (from Rev. A unenhanced to Platinum IIe's).
>There are discrepancies between cards... even Apple's.

The differences are due to the computer's ROM, not the 80-column card.
The card itself has no ROM on it, just 1K or 64K of RAM (1K on the
regular 80-column card, 64K on the "extended" 80-column card).  These
days you can't buy the 1K version, which had only enough of the
"auxiliary bank" of RAM for the text screen.

The difference was just that some of your Apple IIe machines were
"enhanced" and some were not.  (The enhancement is 3 parts: replacing
the ROM, replacing the 6502 with a 65C02, and replacing the character
generator with one that has MouseText in there.)
-- 
David A. Lyons, Apple Computer, Inc.      |   DAL Systems
Apple II Developer Technical Support      |   P.O. Box 875
America Online: Dave Lyons                |   Cupertino, CA 95015-0875
GEnie: D.LYONS2 or DAVE.LYONS         CompuServe: 72177,3233
Internet/BITNET:  dlyons@apple.com    UUCP:  ...!ames!apple!dlyons
   
My opinions are my own, not Apple's.