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thanks for your reply.
the eprom is burned ok, i checked:)
i was just thinking about the wiring... so, the game can have troubles at some point of the game... there is no way to test it other than play it to the end, right?

Hi, i'm here with another newbie question! i'm making a repro (snes) for a friend. since he is going to leave town i can't fix it if something goes wrong... so, the question: if the eprom is not burned properly or the solder is not good in some point will the game works but stops at some point, like...

No i was thinking put two chips again, but 8mbit each... But i don't know if the game MUST be 32mbit or can be less...

A little update with another question:)

Can i use a 32mbit cart (2 chips) for a 16mbit game? or it MUST be 32mbit?

Hi, i have a couple of questions regarding the snes cartmodding: first of all, i saw this page: http://www.generation-snes.fr/Forum/index.php?showtopic=183 Does this works with every 16mbit hirom game (with matching srma)? For example, does this tutorial with the great tool SWAPBIN works with Live-A...

sorry for the delay... i was really busy:) anyway the problem was not the rom. It was just the battery, since i din't know how to do it, i soldered it in the wrong way. Tested with the "battery knowledge thing" it all went good:) thanks to everyone:)

Hey, wait a minute :) I tried a different game, it's true. Because desoldering the other (zelda outlands) i accidentaly broke a pin on a chip. I will try again to determinate if it was caused by the rom when i get another pcb availabe :) I can't remeber if i did that but do you think that if i tried...

Ok... i took a new mmc1 pcb. tried another game.
Just to test i made Faria.
IT WORKED. i REALLY don't know why THIS worked since i made the SAME things as the other board.
A dead chip? Bad rom? don't know. :/
ps:as always i thank you all.

for the record: i tried that mobile sram method. It does not work: the game freeze.

Measure the voltage as it goes from the + terminal of the battery to RAM. You should see a ~0.7V drop after the diode, then no other significant drop to the RAM, unless your repro board for some reason puts two diodes in series. If you see a large voltage drop on the resistor, it means something is...

Do you think i can do this:



maybe i can try with the diode and the resistor too at first...
I mean, maybe with this method i can be sure if the saving works, right?
I don't think this will harm my cart... at least i hope so

i don't want to be rude but

About D2 (2nd diode) the pcb was already like that when i bought (wired i mean). I tried put a diode there too but it was unaffective

i just desoldered it after some try and put the wire back.

The game saves fine on two emulators so i don't think that's the issue. And i'm pretty sure i put the diode in the right direction. About the battery: i tried every combination possible (there are 3 solder pads on the back). I put two pictures: http://img199.imageshack.us/img199/4552/pict4284i.th.jp...

the chip is:
HM6264LP-70

Yes i used the right chip. It was written on the repropak manual: i used a 6264. Can't take a picture right now...i will tomorrow if it usefull...
edit: the manual is this http://www.retrousb.com/downloads/repro ... manual.pdf