nesdev.org

Using a 2 mask rom BJ3M board as a donor:
http://www.snescentral.com/pcbboards.ph ... VC-BJ3M-20

I'm using two TSOP package adapters.
P0 has 29F033C with the first 4MB of the ROM.
P1 has 29F016B with the last 2MB of the ROM.

I know this donor has A21 grounded.
So, I'm supposed to wire Cart edge pin 48 to MAD-1 #13

Now, which pin exactly do I rewire A21 to?
I've looked around, but the best info I found had a picture where the solder point was obscured by hot glue.


Is it also wired to MAD-1 #13, or is it on #14?

Mine is done this way:
-MAD-1 (pin #13, chip only) goes to SNES CON. pin #48
-MAD-1 (pin #12) goes to SNES CON. pin #47
-A21 (first ROM) goes to SNES CON. pin #46

Also keep in mind that Tales of Phantasia is an EXHIROM game and thus /OE of the first and second ROM have to be swapped together on MAD-1. I mean if you have a game with 2 different ROM chips, you usually connect /OE of the first ROM to MAD-1 pin #16 and the /OE of 2nd ROM, you connect it to MAD-1 pin #01 but for EXHIROM games it is swapped, I mean you have to connect /OE P0 to MAD-1 pin #01 and /OE P1 to MAD-1 pin #16. I have no idea why that is but it is done this way and it works only this way

Hi, that's my picture.

Mad#13 is lifted and joined to slot edge connector #48
Hole in mad#13 should be joined with a21 (only in maskrom #0 is needed but I joined both of them)


And remember, if you're using that board, the 32mb flash goes to the P1 maskrom hole and the Last 16mb goes to the P0 hole.