Re: VIC-42

From: Mike Naberezny <>
Date: Sat, 26 Jun 2021 11:27:58 -0700
Message-ID: <>
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.


Mike Naberezny (
Received on 2021-06-26 21:00:03

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