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r190728 Thursday 17th November, 2022 at 16:43:09 UTC by James Wallace
barcrest/mpu4.cpp: Add IC4 port B shadowing of serial and 50Hz signals. (#10426)

Also Fixed AY8913 chip select routine that relied on the wrong PIA and improved save state support.

Clones promoted to working
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The Crystal Maze (v1.3, Datapak) (MPU4 Video)
The New Crystal Maze Featuring Ocean Zone (v2.2, Datapak) (MPU4 Video)
The Crystal Maze Team Challenge (v0.9, Datapak) (MPU4 Video)
[/branches/pc88va_spring_cleaning/src/mame/barcrest]mpu4.cpp mpu4.h mpu4_characteriser_pal.cpp mpu4_characteriser_pal.h mpu4bwb.cpp mpu4crystal.cpp mpu4mod4yam.cpp mpu4redpoint.cpp mpu4vid.cpp


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