[hatari-devel] Moai demo as regressed a lot since hatari 1.4

Miro Kropáček miro.kropacek at gmail.com
Thu Jul 14 13:55:23 CEST 2011


>
> And the 2 componants that are probably not well accurate are the 68030 (16
> bits bus) and the Videl.
>
Trust me, you don't need to make Videl very accurate... it's true it takes
some time from the bus but this time can be quite easily calculated (amounts
of words needed per one vbl), things like wait states or single/double
lines... this makes no sense. That would be really a huge coincidence some
demo would be timed to tightly even 1-2% balance in CPU speed would make a
difference.

Is access to memory always rounded to the next 4 cycles ?
> (saw in memory.c)
>
Yes, just keep in mind it's 16-bit access, i.e. four cycles for every word
access. As a proof of concept, you could try to divide access time in UAE by
two, might uncover some interesting things.

-- 
MiKRO / Mystic Bytes
http://mikro.atari.org
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