Date   : Mon, 10 Jul 2006 22:11:47 +0200
From   : John Kortink <kortink@...>
Subject: Re: Writing / invoking assembler on the beeb

On Mon, 10 Jul 2006 17:06:15 +0000, you wrote:

>Rob wrote:
>>> Joel - was it you who was possibly looking at modifying xfer to work 
>>> with the user port? 
>> 
>> Is John Kortink's 65Link cable suitable for your needs?  Since that 
>> wheel has already been invented.. :-)
>> http://web.inter.nl.net/users/J.Kortink/home/software/65link/index.htm
>> (cable spec is within the "Guide" text file within the archives.
>
>aha, yep, that'd be ideal. Unfortunately the actual handshaking protocol
 isn't 
>documented anywhere I've seen, and the source doesn't seem to be
available, so 
>I'd still have to invent something there which would possibly turn out
to be 
>different. (I say possibly because there's probably only a limited
number of 
>ways for transferring bytes and initialising the VIA on the BBC to use
both 
>CB1 and CB2 lines)

Not very many, no. The number of permutations is limited ...

>I can wire the cable the same way, at least.
>
>John - you reading? Any plans to open-source the code, or at least
publish 
>details of the protocol?

You can glean it from the source code of the server side.


John Kortink