Re: VIC-42

From: Mike Naberezny <>
Date: Mon, 21 Jun 2021 18:06:21 -0700
Message-ID: <>
On 6/20/21 8:43 AM, Six Of DLoC wrote:
> Anyone have an Alphacom 42 they want to pop open and see if one of these is on 
> the board?

I have an Alphacom VP42 printer and to my surprise, it does indeed contain a 
"VIC-42" chip:

My first thought upon seeing this was that it could be a MOS 6500/1 like in 
the Commodore 1520 plotter.  I did some quick continuity checks and that seems 
probable.  Vcc, Vss, and the crystal match the pins on the 6500/1 datasheet.

As David Wood noted, there are different versions of this Alphacom printer. 
This one is badged "VP42".  There is another one on eBay USA right now (item 
154500859889) that is badged only "42".  It is externally very similar but the 
board is different and has an 8041 instead.


Mike Naberezny (
Received on 2021-06-22 04:00:02

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