Can't figure out CA and CB ports on 6522

From: Sellam Ismail <>
Date: Mon Dec 30 00:45:01 2002

I'm having a heck of a time figuring out how to use the CA and CB ports on
the 6522 as inputs. From the documentation I have, it seems the CA port
can be used for one TTL input, and CB can be used as two.

But how do you set them up as such? The documentation is confusing.

I'll sleep on it and see if either a) I wake up refreshed and figure it
out or b) wake up and find a nice helpful message waiting here ;)

Sellam Ismail Vintage Computer Festival
International Man of Intrigue and Danger

 * Old computing resources for business and academia at *
Received on Mon Dec 30 2002 - 00:45:01 GMT

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