timed wait using CIAs

[jotd]

Hi,

I've been hacking around for 15 years but I still cannot figure out a "clean" method to avoid an active delay loop using the CIAs.

I have a method using VPOS that we use extensively in whdload fixes, but it fails in that particular case (seems to interfere with the processing and gfx is trashed)

Anyone has a "generic" CIA timing routine?

[girv]

I've uploaded source code of my blitter speed test WHD slave to the Zone. It includes an example use of CIA interval timing. Maybe that will be useful?

[jotd]

Originally Posted by girv

I've uploaded source code of my blitter speed test WHD slave to the Zone. It includes an example use of CIA interval timing. Maybe that will be useful?

thanks, I think I can use it.

[Toni Wilen]

Extrmely stupid but simple delay: poll any CIA register in a loop, CIA accesses have same (very slow) speed on all Amiga models (if the problem only happens when polling "Agnus bus" = chip ram or custom registers)