Re: User Port and AutoRun Addresses

From: Nick Coplin (
Date: 2001-02-02 09:26:40

>> What is the pinout of the userport regarding datalines only, is it C64/V20 compatible?
>RS232 is operated via a 6551 (aka swiftlink) chip in the plus 4, and 
This must be only for the lines related to the RS-232 which are software controlled on the C64... so modems are compatible, but I'm specifically interested in where the lines for the 6529 come out for an 8-bit interface

Now that I remember my other, what is the bit assignment for the IEC lines? I recall that they got to the on-CPU I/O port.

Many thanks, Nick

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