Subj : Re: User Port Pins
To   : cbmeeks
From : Ed Vance
Date : Fri Sep 28 2018 12:53 pm

09-25-18 10:42 cbmeeks wrote to All about User Port Pins
Howdy! cbmeeks,

I couldn't find my C=64 Programmers Reference Manual to help You but


go to   www.zimmers.net   if You have a internet connection.

He has all kinds of information on Commodore Products.



 cb> @MSGID: <5BAABE2F.2792.cbm@capitolcityonline.net>
 cb> I'm curious about how to access certain pins of the C64 User Port.
 cb> Going by the pinout here:

 cb> https://www.c64-wiki.com/wiki/User_Port

 cb> I see there are some pins I'm not familiar with.


 cb> 4       CNT1.Counter 1, from CIA #1
 cb> 5.SP1.Serial Port 1, from CIA #1
 cb> 6.CNT2.Counter 2, from CIA #2
 cb> 7.SP2.Serial port 2, from CIA #2
 cb> 8./PC2.Handshaking line, from CIA #2
 cb> 9.ATN.Serial attention in
 cb> ...
 cb> B./FLAG2.Flag 2
 cb> ...
 cb> M.PA2.PA2


 cb> I have a basic idea what the counters are for but I'm looking for more
 cb> detailed information on all of those pins.

 cb> Are there any programming and/or schematics out there that indicate how
 cb> to use them in various projects?

 cb> Thanks


.... "It Shouldn't Be This Hard" - Leo Notenboom
--- MultiMail/MS-DOS v0.49
 * Origin: capitolcityonline.net * Telnet/SSH:2022/HTTP (1:2320/105)

.