speed, (for experts)

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Par hit9918

Prophet (2926)

Portrait de hit9918

23-10-2016, 12:04

openmsx sources show blitter speed to be dependant on video DMA and sprite DMA.
so there is sheduling with video vs blitter.
but cpu acesses could go on the other port of dual ported RAM.
then a sheduling of cpu vs blitter is not needed.
the dual ported RAM has complicated logic, two things can acess from completely different addresses.
the 9990 could have less logic than 9938 in the memory aecess section.

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