Re: ROM Dump of Amiga Keyboard controller

From: Jim Brain <>
Date: Mon, 21 Jul 2014 12:39:00 -0500
Message-ID: <>
On 7/21/2014 12:13 PM, Gerrit Heitsch wrote:
> On 07/21/2014 07:59 AM, Jim Brain wrote:
>> On 7/19/2014 3:42 AM, Gerrit Heitsch wrote:
>>> I get the strangest ideas while at the public pool doing laps...
>>> Now that we have the ROM of the 6500/1 in the VC-1520 dumped,
>>> disassembled and analyzed, shouldn't it be 'relatively' easy (*) to
>>> build a 100% compatible replacement using one of the Atmel Atmega with
>>> enough I/O pins? The Atmega16 comes to mind here. 16 KB flash and 1 KB
>>> RAM should be more than enough. The pinout is different, but that
>>> would be a purely mechanical problem.
>>> (*) for people who know that controller well enough
>>>  Gerrit
>>>       Message was sent through the cbm-hackers mailing list
>> I am sure it's not a huge challenge, but what other cool features should
>> the 1520 have :-)  That would seem to be a question worth considering?
> Hm, I could see someone using a properly programmed Atmega16 in a 
> VIC-1520 to be able to use it again. 

Is this a problem?  In the US, at least, people can't seem to give 
working 1520 units away.  I pawned a few off a few years ago, but it was 
not without difficulty.  If there is a need for the 1520, it's for that 
funky gear that always breaks.  Academically, it's possible, but there's 
little demand or challenge.  That's why I asked for new features, as 
that might make it a challenge.
> But I'm not sure if additional commands would be useful. Even if 
> someone is still using a 1520 in a production environment, the 
> software would only know about the original command set and font.
They were a toy in the 1980's, so I seriously doubt anyone used one in 
prod.  I thought adding a few more commands might entice people to dig 
the unit out and play with it.

> And for demonstration purposes on an exhibition, the original commands 
> are good enough.
>  Gerrit
>       Message was sent through the cbm-hackers mailing list


Jim Brain

       Message was sent through the cbm-hackers mailing list
Received on 2014-07-21 18:01:37

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