Re: VIC-42

From: Gerrit Heitsch <>
Date: Sat, 26 Jun 2021 21:10:43 +0200
Message-ID: <>
On 6/26/21 8:27 PM, Mike Naberezny wrote:
> On 6/21/21 10:58 PM, Gerrit Heitsch wrote:
>> If it's in fact a 6500/1 then the firmware should be dumpable using 
>> the same method as was used for the Amiga keyboard controller and the 
>> 1520 plotter.
> It worked.  It is now confirmed that the "VIC-42" is a MOS 6500/1.
> The dump can be downloaded from my page:
> I haven't done a complete disassembly of it, but I did check the dump by 
> following the reset vector.  It leads to 6502 code that starts by 
> clearing decimal mode and setting the stack pointer, as one would expect.

Lets see if this is really only 2 KB or if MOS also had a version with 
more ROM. The code will tell.

Received on 2021-06-26 22:00:02

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