128mbit game possible?

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MaarioS
Posts: 149
Joined: Wed Jul 22, 2009 8:53 am

Re: 128mbit game possible?

Post by MaarioS » Wed Apr 01, 2015 12:06 pm

I barely understand what you said about mirroring but thanks for your interested in my tpoic anyway heheh

Basically I'm so desperate to do this that I even built 12MB dev-cart today. Basically it is designed for 8MB memory (exHIROM) + 4MB memory configured as LOROM. All memories have been connected exactly this way:
http://www.cs.umb.edu/~bazz/snes/96MbCart/derp.html

PCB:
Image
Image

74LS139 is connected like this:

01-MAD-1 pin#04
02-MAD-1 pin#12 (shared with PCB)
03-GND
04-/OE ROM 4MB (LOROM)
05-/OE ROM 8MB (EXHIROM)
06-NC
07-NC
08-GND
(and pin#16 is +5V)

I can confirm once again that Star Ocean configured this way does NOT work on this board: 8MB ROM consists of ROM2+ROM1 (written in this order) and 4MB ROM is ROM3.

Anyway I also programmed Holy Striker Batman 12MB ROM (provided by tepples) the same way as Star Ocean above. Here's what I got:
Image

Is this correct??

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