Japanese MegaCD BIOS 1.00C

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TmEE co.(TM)
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Japanese MegaCD BIOS 1.00C

Post by TmEE co.(TM) » Mon Jun 10, 2019 6:32 pm

I was given a chance to dump a new Mega CD BIOS, Japanese version 1.00C and here it is :
http://www.tmeeco.eu/SMD/BIOS/MegaCD%20J%201.00C.BIN
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Huge
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Re: Japanese MegaCD BIOS 1.00C

Post by Huge » Mon Jun 10, 2019 8:46 pm

I remember seeing that "pre-retail" unit. Glad to see the boot rom got dumped!

It also predates the official rom identification number (not marked as EPR/MPR-14088x).

For the record,
EPR-14088B - ver 1.00g
EPR-14088C - ver 1.00l
EPR-14088D - ver 1.00o
EPR-14088E - ver 1.00p
MPR-14088H - ver 1.00S

That leaves EPR-14088, and EPR-14088A, F, and G undumped - if they were ever even released. One of the service manuals mentions EPR-14088A as being very buggy. Rev H was I guess the one deemed stable enough to be turned into a mass produced chip, getting mask rom prints instead of just EPROMs.

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