Re: 6522 VIA inputs

From: Mike Naberezny <mike_at_naberezny.com>
Date: Fri, 21 Apr 2017 10:12:49 -0700
Message-ID: <11975527-0ea7-5d5f-4aa0-2315f7669907@naberezny.com>
On 4/21/17 9:10 AM, Gerrit Heitsch wrote:
> Take a look at the MOS datasheet for the 6522 (If you can't find it, I can 
> mail it to you), it has schematics for the port drivers for port A and port B, 
> they differ, but both ports have a permanent pullup in form of a MOS 
> transistor for each bit.

The MOS 6522 datasheet can be downloaded from here:
http://6502.org/documents/datasheets/mos/

The port drivers are on page 3 of the PDF.  The Rockwell and Synertek 6522 
datasheets are also on 6502.org.

Regards,
Mike

-- 
Mike Naberezny (mike@naberezny.com) http://6502.org


       Message was sent through the cbm-hackers mailing list
Received on 2017-04-21 18:00:02

Archive generated by hypermail 2.2.0.