Path: utzoo!utgpu!news-server.csri.toronto.edu!clyde.concordia.ca!uunet!decwrl!ucbvax!agate!web-3a!laba-3eh
From: laba-3eh@web-3a.berkeley.edu (Eric van Bezooijen)
Newsgroups: comp.dcom.modems
Subject: Commodore Modem Cable
Keywords: commodore, modem
Message-ID: <1990Aug11.012031.28192@agate.berkeley.edu>
Date: 11 Aug 90 01:20:31 GMT
Sender: usenet@agate.berkeley.edu (USENET Administrator;;;;ZU44)
Reply-To: laba-3eh@web.berkeley.edu (Eric van Bezooijen)
Organization: University of California, Berkeley
Lines: 68


Hi there,

I own a commodore 128, and I just borrowed (permanently) a SMARTteam
103/212A modem (hayes compatible).

I want to make a cable from the data port of the modem to the user I/O
port to the commodore... The Commodore  manual says you can stick a 
modem there, so that is what I intend to do, and I do not want to spend
50 bucks buying a cable, so I wanted to make one myself.

The user I/O port has 24 pins, and the configuration is as follows in the
manual :


  1  2  3  4  5  6  7  8  9  10 11 12
  ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^ ^^
  a  b  c  d  e  f  h  j  k  l  m  n

   Pin			Type 		Note

   1			GND		max 100 mA
   2			+5V	
   3			RESET		
   4			CNT1
   5			Sp1
   6			CNT2
   7			SP2
   8			PC2
   9			SER ATN IN
   10			9 VAC		max 100 mA
   11			9 VAC		max 100 mA
   12			GND

   A			GND
   B			FLAG2
   C			PB0
   D			PB1
   E			PB2
   F			PB3
   H			PB4
   J			PB5
   K			PB6
   L			PB7
   M			PA2
   N			GND


Now the problem arises when I try to figure out what the hell these abbreviations
mean.. I mean, I know what GND, 9 VAC, and +5V mean, of course, but what does
PB5, SP2, and PC2 stand for?  Could anyone de-mistify these terms?

In the Modem manual, things are a little easier to comprehend...  

	Pin		Description

	1		GND
	2		Transmitted data
	3		Received data
	5		Clear-to-send
	6		Data Set Ready
	7		Signal Ground
	8		Carrier detect
	20		DAta terminal ready (DTR)
	22		Ring indicator.

Does ANYONE knopw how to match these two ports up correctly?  If so, please
mail to laba-3eh@web.berkeley.edu, and I will be eternally grateful.