Dave Laundon wrote: > Ok, my first post here in ages, here goes... > > the official Z80 cycles rounded up to the next multiple of 4 (or 8 in > screen time), or, 4 (or 8) times the number of memory accesses; > whichever is greater.
Thanks! I vaguely remembered something like that but wasn't sure. > Mmm, I'd have thought the first method would run quicker, even when it > was AND &EE. I'm confused now. Anything else going on in the loop? I thought the problem I was experiencing (border scrolltext jerking around occasionally) had stopped when I changed the code to use RES - but now it seems otherwise, so you're probably right. As an aside, does anyone still have a real live SAM linked up - I can't tell whether this problem is due to something in my code or SimCoupe's emulation - I'm pretty sure it never -used- to do this... :) Cheers Geoff
