From: Spiro Trikaliotis (trik-news_at_gmx.de)
Date: 2004-01-16 08:42:01
On Fri, Jan 16, 2004 at 08:26:40AM +0100, Baltissen, GJPAA (Ruud) wrote:
> I noticed that this 9V AC is rectified as well, inside the C64. This
> means there is no galvanic isolation and thus no free use of the 9V
> AC.
This is used for the generation of the +5V ("CAN +5V" in the schematics)
of the VIC-II, and the +12V for the VIC-II and SID. The +9V is even
rectified and used unregulated for the cassette motor driver.
Anyway, I must admit I do *not* understand how the +12V is generated of
the 9VAC, this part of the schematics is beyond my understanding of
electronics. :-(
Spiro.
--
Spiro R. Trikaliotis
http://www.trikaliotis.net/
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