Wilf's NOVA2005 for 50 Hz Zeddies?

Any discussions related to the creation of new hardware or software for the ZX80 or ZX81
User avatar
Paul
Posts: 1063
Joined: Thu May 27, 2010 8:15 am
Location: Germanys west end

Re: Wilf's NOVA2005 for 50 Hz Zeddies?

Post by Paul » Wed Mar 07, 2018 11:56 am

I thought there was an IO bit somewhere showing the machine should run on 50 or 60 Hz.
In theory, there is no difference between theory and practice. But, in practice, there is.

User avatar
PokeMon
Posts: 2225
Joined: Sat Sep 17, 2011 6:48 pm

Re: Wilf's NOVA2005 for 50 Hz Zeddies?

Post by PokeMon » Thu Mar 08, 2018 2:47 pm

Yes - this is read from keyboard routine and stored to MARGIN.
So the fastest way is to read MARGIN and add/subtract to get the desired value(s).
And this way assures same timing regardless if PAL or NTSC. ;)

Post Reply