Re: C= and internet

From: Nicolas Welte (
Date: 2001-02-15 14:58:39

MagerValp wrote:
> >>>>> "PD" == Professor Dredd <> writes:
> PD> Howdy Nate! Fancy meeting you here ;) Thanks for the run-down on
> PD> IIC/I2C. Some of it went over my head, but its enough to know that
> PD> its a serial port I can't connect to my Commodore (cry)
> It'd be possible to wire up a small I2C interface, using something
> like

I have a (German language) book for the C64 that describes a I2C interface on
the cassette port, it is used to implement a real time clock interface. Since
the I2C electrical interface is almost the same as the C64 serial bus, it
should be possible to drive I2C devices just with software. Of course you
would lose the possibility to use standard serial port devices then, but for
playing around with I2C it should be fine. The only problem is speed: If the
C64 is master, there isn't a problem, but if you want to use it as an I2C bus
logger or slave device, the maximum bus speed of 100 or even 150kHz might be
too much. But I doubt that this limit is ever reached in real-life, micro
controller operated applications.

This message was sent through the cbm-hackers mailing list.
To unsubscribe: echo unsubscribe | mail

Archive generated by hypermail 2.1.1.