Opened 5 years ago

#24 new accuracy

68K refresh delays are only approximate

Reported by: mikepavone Owned by: mikepavone
Priority: minor Milestone: future
Component: Genesis/Megadrive Version: 0.5.0
Keywords: Cc:

Description

Currently, BlastEm adds 2 68K cycles of delay every 128 68K cycles unless refresh occurs during a hardware access. This should be modified so that a delay is only incurred if there is actually a memory access to the cartridge or expansion port memory areas during refresh. Additionally, access to work RAM should be subject to delays based on a separate timer with slightly different rules.

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