Re: US VIC-20 & interlaced graphics

From: Marko Mäkelä (
Date: 1998-10-29 10:25:07

On Wed, 28 Oct 1998, Ruud Baltissen wrote:

> I disagree. My 3rd Vic is also a two-prong-type. It needs 9V AC. For
> what else do you a rectifier bridge? 

For rectifying the AC.  The rectifier bridge will work with DC as well; 
it'll just use the same pair of diodes all the time.  The VIC-20 doesn't
need alternating current for anything; the 9 VAC input goes directly to
the rectifier bridge, which will convert it to DC.  5 volts is generated
with a regulator; there's no transformer inside the VIC-20.

> (Or those another type exist I do not know of and should I keep my big
> mouth shut?) 

I was not aware that there could be several different versions of the old
VIC-20 board (with the two-prong power connector).  I only know that there
are different two-prong connectors; the European two-prong power adapter
won't fit to my NTSC VIC-20's power connector.


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