Date   : Sun, 28 Mar 1999 23:16:20 -0800 (PST)
From   : Angus Duggan <angus@...>
Subject: Re: Running U.K. beeb on U.S. power "af8Gg01zXrl3k6yy32OtE9Q11v"

Rick Galbraith writes:
>There should be no problem, as the voltages are mostly reconverted in
>your machines to direct current.
>
>If any of your power supplies have cooling fans, the fans may speed up a bit
>because of the higher frequency of the power. Other than that, no change.
>
>For any further questions, go to www.comspec.com
>(or is that www.comspec.ca ?).  They were the Canadian importer or whatever,
>and they still had some BBC Micros unsold, if you wanted to pay the price.
>They weren't going at garage-sale prices, either.

I'll check it out. What about the flyback sync? There is an interrupt
generated by the 6845 (?) that indicates the start of the video frame.
Elite and various other mode-shifting games use it to determine when to alter
the 6845 registers. The flyback signal was generated at 50Hz, I always
assumed due to some coupling between the mains frequency and video scan
frequency (though thinking about it now, there doesn't seem to be any reason
that there should be).

a.