From: Spiro Trikaliotis (trik-news_at_gmx.de)
Date: 2004-01-16 07:31:29
On Fri, Jan 16, 2004 at 06:57:27AM +0100, Groepaz wrote:
> On Friday 16 January 2004 06:23, William Levak wrote:
> > The two pot lines are connected to the SID chip. Connecting those
> > together may not produce anything usefull.
> mmmh i see another problem here... if you connect two c64's using some
> cable that doesnt contain resistors to limit the current, its really
> easy to kill their cia's when you arent extra careful and dont make
> sure that not accidently two c64s are programmed to use the respective
> lines as output. mmmh.
Thinking of the joystick port: Especially in control port 1, the
joystick lines are connected to the CIA port which is an output, isn't
it? Pressing some key on the keyboard, even control port 2 is driven via
the key itself. Although it is not for very long - and the joystick in
port 1 always shortens the CIA, unless someone has reprogrammed the DDR,
which doesn't seem to be usual - the c64 *are* driving the lines as
outputs, and this does not seem to be a good idea, is it?
Spiro.
--
Spiro R. Trikaliotis
http://www.trikaliotis.net/
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