[vcf-midatlantic] Robots and Relays and Commodore

Dave McGuire mcguire at neurotica.com
Wed May 25 14:54:44 EDT 2016

On 05/25/2016 01:47 PM, Chris Fala via vcf-midatlantic wrote:
>>> Would this help?
>>> http://www.ebay.com/itm/152084733487
>> ​almost,
>> that one has 6 outputs
>> you need one with 10 outputs​
> Thought the C64 user port only had an 8-bit port. Where are the other two
> connected? The VIC has a few of the joystick port connected to the user
> port, but not sure what other outputs you can get out of the C64.

  There's a zillion different ways to demultiplex parallel I/O lines.  A
degenerate case (but a valid one) is an I2C I/O expander, some of which
can give you 32 I/O lines from just two.


Dave McGuire, AK4HZ
New Kensington, PA

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