Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!cs.utexas.edu!ut-emx!walt.cc.utexas.edu!greg
From: greg@walt.cc.utexas.edu (Greg Harp)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: Commodore 64 EMulator Cable
Message-ID: <33990@ut-emx.UUCP>
Date: 14 Jul 90 06:59:45 GMT
References: <11254@hydra.gatech.EDU> <279@cbmger.UUCP>
Sender: news@ut-emx.UUCP
Reply-To: greg@walt.cc.utexas.edu (Greg Harp)
Organization: The University of Texas at Austin, Austin, Texas
Lines: 35

In article <279@cbmger.UUCP> peterk@cbmger.UUCP (Peter Kittel GERMANY) writes:
>In article <11254@hydra.gatech.EDU> gt4662b@prism.gatech.EDU (BRANHAM,JOSEPH FRANKLIN) writes:
>>Just curious, but someone posted that go-64 and the Commodore Emulator II
>>use only a cable to the parallel port to connect up a 1541 drive. I was
>>just curious if anyone knew how they got a CABLE to handle the change over
>>to the 64's deranged serial port.
>
>It only *LOOKS* like a simple cable. Really it has some (little)
>interface electronics built in (line drivers,...).

Sorry, but there is no magic interfacing hardware for the 64 Emulator 2.
The cable is just a DB25 and a 6-pin DIN, with 4 pins of the DIN connected
to 6 pins of the DB25.  I don't know what patents exists for this cable,
so I won't post the pinouts here.  However, I assure you (with the puppy
sitting right in front of me) that the cable is just that -- a cable.
Nothing more to it!

Like I said before, since the C64 serial port and the Centronics parallel
port on the Amiga are both TTL(+5V and 0V), no magic hardware is required.
A clever bit of code drives the entire interface, and with the slow C64
serial bus speeds, the Amiga can easily fake it.  

>-- 
>Best regards, Dr. Peter Kittel      //     E-Mail to 
>Commodore Frankfurt, Germany      \X/      rutgers!cbmvax!cbmger!peterk

...greg...


        ___  Disclaimer:  The opinions expressed above are not my own, but
AMIGA! ////  the property of some higher-up power, to which I am only a tool.
      ////     "Welcome, my son.  Welcome to the machine." -- Pink Floyd
___  //// "Reality is only a simulation, and it's still in beta testing." -- Me
\\\\//// 
 \\XX//            Greg Harp                greg@ccwf.cc.utexas.edu