[vcf-midatlantic] PAL c64 - Power supply

Jonathan Gevaryahu jgevaryahu at gmail.com
Sun Jun 17 23:44:47 EDT 2018

There is one "Gotcha" to be aware of if driving a PAL c64 from an NTSC 
psu in the USA:
Because the 9VAC input to the c64 is derived from a linear power 
transformer, the TOD "RTC" interrupt to one of the CIA chips will be at 
60hz, not 50hz, so any software which depends on that "clock" circuit 
incrementing at 50hz will be wrong.

On 6/17/2018 10:21 PM, Bill Loguidice via vcf-midatlantic wrote:
> I use an American power supply on my PAL C-64. No issues. Same thing on the
> Atari 8-bit side.
> ========================================================
> Bill Loguidice, Managing Director; Armchair Arcade, Inc.
> <http://www.armchairarcade.com>
> ========================================================
> Authored Books
> <http://www.amazon.com/Bill-Loguidice/e/B001U7W3YS/ref=ntt_dp_epwbk_1> and
> Film <http://www.armchairarcade.com/film>; About me and other ways to get
> in touch <http://about.me/billloguidice>
> ========================================================
> On Sun, Jun 17, 2018 at 5:12 PM Jeffrey Brace via vcf-midatlantic <
> vcf-midatlantic at lists.vcfed.org> wrote:
>> So the PAL c64 has a different type of power supply. A european two prong
>> type. Does anyone know what it will take to convert power to American 120V?
>> I need to start planning on how to get this machine up and tested at the
>> next workshop June 30.
>> --
>> =========================================
>> Jeff Brace
>> Vice President
>> Vintage Computer Federation

Jonathan Gevaryahu
jgevaryahu at gmail.com
jgevaryahu at hotmail.com

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