On Fri, 2 Feb 2001, Nick Coplin wrote: > Hello All, > > Lacking a programmer's reference guide for all but the C64, I need some address info about the C128 and C16/Plus4 > > C16/Plus4: > What address is the userport at and the DDR for it? C16: nonexistent user port plus 4: I dunno the address, but read below > 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 the I/O lines are run from a chip whose code I forget. It's like a single port from a via, but contained alone in a 18pin chip (I'd love to get a box of these if someone listening knows where to find em!). - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tml.hut.fi.
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