Re: UD3 ROM on a 3032

From: Marko Mäkelä <>
Date: Mon, 6 Feb 2017 19:54:05 +0200
Message-ID: <20170206175405.fxelcl6ivvp3c6yb@hp>
Hi Francesco,

>> My C2N232 might be one more option, if you can find one second-hand.
>> However, it relies on RS-232, which nowadays is mostly available via an
>> unreliable USB converter. The c2nload utility would load a minimum-size
>> loader (192 bytes tape header + 2 bytes payload to jump into the tape
>> header) and then use that to load the actual payload at 38,400bps.
>yes, I've seen your tape adapter. I have many computers (PCs even) with 
>RS-232, so it wouldn't be a problem. The real problem is it uses an old 
>micro AT90S2313. I have tons of ATtiny2313 instead, I've found a 
>firmware for the new microcontroller but I'm not sure about the 
>schematic getting modified or not.

There was an improved circuit board for a C2N232I that features a serial 
bus connector and in-circuit programming via the RS-232 interface. I 
never got around to completing the protocol translator for the serial 
bus. And nowadays there is sd2iec, so there is little motivation to 

If I remember correctly, the ATtiny2313 is a drop-in replacement of the 
AT90S2313 when it comes to this circuit. There is a separate firmware 
that was adjusted for the software-side differences between the 
ATtiny2313 and AT90S2313.

>Sorry but the documentation about C2N232 could be a bit better maybe :)

It is not a commercial product. :)

I have been thinking of putting all my old C= stuff on GitHub so that it 
can be forked easily and pull requests be submitted. Some day I should 
really do that.


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Received on 2017-02-06 18:01:41

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