[comp.sys.amiga.hardware] My system clock has a lead foot!

stephen@cia.docs.uu.se (Stephen Cooper) (04/24/91)

I have an american A1000 here in Sweden.
This hasn't posed any problems except for one:
My system clock goes twice as fast as real time.

I think that the problem is this -- The system sees that
it has an NTSC disply and automatically assumes that it has
a 60 Hz power frequecy.  I've checked this out by examining
SysBase.  Despite the fact that I have a 50Hz power supply,
on boot SysBase contains 60Hz power supply frequency.  Changing
this has no effect on the clock, however.

Various combinations of NTSC and PAL screens give me
several different effects.  I can obtain 'real-time' by
booting with my NTSC monitor and a PAL tv together, and
then turning off the PAL tv.

Another oddity -- despite the fact that my monitor is
coupled to a 50Hz power supply, it still generates 60 
vertical blanks per second.  How is this possible?

Thank you for all help.

Stephen Cooper
Uppsala University
stephen@cia.docs.uu.se