
minimize register reads/writes. makes more interrupt handling easier to add, for instance iir interrupts. Change-Id: I97a7e9fcc9273ada6c0f12d5343bf7804f8bdd20 Reviewed-on: https://review.haiku-os.org/c/haiku/+/5174 Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org> Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>