Re: Unusual IIc??

[hochstrasse@ubaclu.unibas.ch (Urs Hochstrasser)]

In article <tcpnntpd.16.8.21.21.50.44.3183328205.65961@lost-gonzo.com>, <sysop@Lost-Gonzo.com> writes:
> TO>   I have 2 IIcs (both 255 versions) but one has some modification done
> TO>to the original motherboard.
[snip]
 
> i'm no expert...but perhaps it is due to the fact i think europe does
> not use the 110v system it is 215 v or something perhaps this
> modification has something to do with it....?
This would probably be handled in the power supply. But in the US electric
power and TVs have 60Hz, in Europe it's 50Hz. Circuitry has probably to
be adapted for such a difference (especially for video). I think the 555 is a
timing chip. In the Apple ][ keyboard encoder board, a 555 was used to
implement the Repeat key.

Cheers
--Urs