Re: VIC-42

From: Gerrit Heitsch <*gerrit_at_laosinh.s.bawue.de*> Date: Tue, 22 Jun 2021 07:58:36 +0200 Message-ID: <4b0844fc-2184-0ef6-3095-c6ace1242a53_at_laosinh.s.bawue.de> · gerrit_at_laosinh.s.bawue.de

On 6/22/21 3:06 AM, Mike Naberezny wrote:
> 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:
> 
> http://mikenaberezny.com/hardware/c64-128/alphacom-vp42-printer/
> 
> 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.

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.

  Gerrit