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From: tabn9@isuvax.iastate.edu
Newsgroups: comp.sys.apple2
Subject: Re: IIc+ accelerator/How to turn it on/off?
Message-ID: <1991Apr23.235309.17755@news.iastate.edu>
Date: 23 Apr 91 23:53:09 GMT
References: <1991Apr21.133402.16305@news.iastate.edu>,<51810@apple.Apple.COM>
Sender: news@news.iastate.edu (USENET News System)
Reply-To: tabn9@isuvax.iastate.edu
Organization: Iowa State University, Ames, IA.
Lines: 31

In article <1991Apr21.133402.16305@news.iastate.edu>, I asked
>I am wondering how I could turn the accelerator on the IIc+ on or off from
>within the program.  I know that by using OPEN APPLE/CONTROL/ESCAPE/RESET
>would turn off the accelerator, but that would restart the entire system.
>Could there be any way to do it without restarting?

To which, in article <51810@apple.Apple.COM>, dlyons@Apple.COM (David A. Lyons)
  replied:
>The information you need to control the IIc Plus accelerator is in the
>Apple IIc Technical Reference, Second Edition, in one of the appendicies.

I could try interlibrary loan, since that book is not in our library, but...

>I believe code was also published in a Q&A column, but I don't know what
>magazine.

In Incider magazine, December (either 1989 or 1990), a short BASIC program
that loaded and called a machine language program.  The data for the ML program
follows:

        169, x, 72, 32, 199, 199, 96
   Where x=1 for the fast mode (3MHz) or x=2 for the slow mode (1MHz)

WARNING!!!!!  Try this code ONLY ON A IIc+,  THIS WILL NOT WORK FOR ANY OTHER
II PRODUCT!!!                                          ---

Thanks for the help, David! 

Tony Neyens, a student at Iowa State University
(TABN9@CCVAX.IASTATE.EDU or TABN9@ISUVAX.BITNET) (Offer expires 5/17/91)