*SOLVED* MM3 on NTSC PSOne

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tlrmcknz
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*SOLVED* MM3 on NTSC PSOne

Post by tlrmcknz » April 28th, 2014, 1:34 pm

First off, I'd like to say my experience level is something around a medium. Not a super noob, not a professional modchip installer. And my soldering skills are only adequate. (especially considering I attempted this mod a bunch of times and got sloppy out of frustration)

I'm trying to get MM3 to boot backups on a SCPH-101 PM-41A. I'm fairly confident that all my points are continuous and not shorting. I'm using a PIC12F675 which to my knowledge is the same as the 629. Oscillator value is still programmed (and assumed valid). From what I've read, the MM3 (usa hex I might add) should be working on a PSOne.

My board version:
Image

Install Diagram:
Image

Wiring:
Image

12F675:
Image

When I insert a backup, I only get the Audio CD menu. Any thoughts on why this isn't working, please let me know.
Also, Old Crow works flawlessly.

* Solved

bad_ad84's install diagram was the only correct one I could find for NTSC SCPH-101 PM-41.

Image

Gradius
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Re: *SOLVED* MM3 on NTSC PSOne

Post by Gradius » April 29th, 2014, 4:09 pm

Thanks for sharing.

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alimadhi
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Re: *SOLVED* MM3 on NTSC PSOne

Post by alimadhi » January 25th, 2015, 5:56 am

HI
I have 7500 NTSC-J and i used MM3 hex 12F629 for 12F675 but not work :(
and i use this install

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Fmicome (*3) Nintendo NES (*8) Clones Famicom (*3) MegaDrive (*6) MegaDrive II (*7) Clones MegaDrive (*4) Dreamcast (*4) Xbox live : Ver:1.4 , Ver:1.6 (*4)
PlayStation : SCPH-5000, SCPH-5502, SCPH-7000, SCPH-7502 (*5), SCPH-9000, SCPH-9002 (*6)
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