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author David Haywood <mamehaze@users.noreply.github.com>2013-01-27 17:16:57 +0000
committer David Haywood <mamehaze@users.noreply.github.com>2013-01-27 17:16:57 +0000
commit4fc811f5ea70088042a9ac505a0ef7558005a204 (patch)
tree3becb754ce646ff9a2dd2a1b7dd2f0492cc0a079 /src/mess/video/pecom.c
parent8c4b25e70b0fa0154847369f2e72cb27dbada0d4 (diff)
4enraya tagman cleanup (nw)
this is a good example of where the tagmaps are significantly slowing things down. Simple driver but because it is using the actual prom to do address decoding, it was incurring a tag lookup on every mem access (2 in the case of ROM) and was running at 200%, when it can actually run at 1200% just by doing the region tag lookup on startup instead.
Diffstat (limited to 'src/mess/video/pecom.c')
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