(PS1) Mayumi 4.0 12F683, 12F675, 12F629

http://dl.consolecopyworld.com/?id=psx&file=patch-it!zip

Here's a region patcher I found with a quick Google search. You can also use "Import Player".

You're welcome!! Glad some people can appreciate the time I took into porting + testing it. You used the 12F629 version I assume?

 

Patch IT - this tool might help to patch USA and EUR to be recognized as JAP region games.
http://www.theisozone.com/downloads/playstation/tools/ps1-region-boot-patcher-ntscpal/
Yes, I used 12F629 in SOIC-8(SOP8) package, but I am sure it will also wors well with DIP-8 version.
It might be a good idea to start to create a compatibility list of supporting revisions (I have them A LOT, many kind of J and E revisions, 1000, 3000(PU-7), 3500(also with PU-7 - if my memory don't cheat me), 5000, 5500, 7000, 7500, 9000, 1002, 102). But I have to wait about a mounth when I will get my 12F629 from China. Today I bought the last two pieces of 12F629 from local store and they were pretty expensive (x3 price vs price from Aliexpress). So, when time comes I will be glad to share my results.
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SCPH-5500(J)-Not confirmed (Spinning a little even if it is a licensed disk and no more, need to resolder)
SCPH-7000(J)-Great
SCPH-9000(J)-Great

 

Awesome, please do.
When there's more results then I would make a chart for it. Not too much to go on now, but also if it's not working for someone there's a chance it could be a mistake/issue on their end as opposed to with the code.