Subject: Re: Small Warning for Xcl
To: Markus Illenseer <markus@TechFak.Uni-Bielefeld.DE>
From: Bernd Ernesti <>
List: amiga-dev
Date: 01/31/1995 21:49:27
Hi Markus,

>  A small warning for all users of Xcl X-Server from Kari:
>  It is possible to destroy your graphic boards hardware using this server,
> even if you use the default settings. 
>  The default settings for the X-Server option 'memclock' - which is 
> responsible for the clock rate in the cirrus chip and the access time to 
> the on-board RAM - are 65MHz which is too much for a Picasso II with only 
> 60ns RAM and most probably also for the other Cirrus-based boards.
>  You should use '-memclock 50' to use a 50MHz clock rate, maximum is
> up to you, i suggest no more than 60MHz for a 60ns RAM board. For 40ns
> you might want to use a max of 65 - 70MHz.

Wait a minute. That's wrong. Look at this source:

    if (strcmp (argv[i], "-memclock") == 0) {       /* -memclock */
        if (++i >= argc) UseMsg();
        cl_memclk=(unsigned char)(atoi(argv[i])*(8/14.31818));

So, you get 27.9 when you use -memclock 50.