Quote:
Originally Posted by Photon
Well, he hadn't decided yet, as I read it. While it's pretty darn hard to get every single cycle timing right, it's very important for the chipset, and especially for Amiga as we know... CPU speed and memory timings/wait-states will affect compatibility in ways that Amiga users are well aquainted with and for which solutions exist. Chipset - nope.
Maybe a solution could be to attempt an exact replica in cycle timings for the A4000 chipset & chipmem timing, and then have a non cycle exact option (or a factor so at least the whole chipset is in "sync")? And CPU and memory could run as fast as they can.
Remaining problems are then "superfastcopper" vs display and CPU vs display cycle timings (or non-DMA audio). The former for things like fullscreen sprite backgrounds and the latter for things like c2p modes, misc "extra-HAM modes" etc.
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I plan to be able to set the copper speed to 3.5, 7, 14 or 28 MHz.
Along with the MOVEM instruction, this will give you a way to get high-color chunky mode with the copper (despite the faster Chip RAM, in hi-res doublescan, you will still eat up all the cycles).
Regards,
Frederic