nesdev.com

I tried to exchange the 74'139 IC, no deal.
I tested the substituted one on another board and it worked.
I'm also inclied to think that it's the ROM.
I'll try to dump the first ROM chip directly and see what will happen.

this cart two prg ic,One of them is bad, the data can't read it out .

Any idea if it's already dumped?
Maybe it's Rockman 3 [p1]?
I think I'll put a 256K chip and remove both.

yes

I think
File: Rockman 3 - Dr. Wily no Saigo! (J) [p1].nes
Directory: D:\BaiduYunDownload\NESRen\
Soft-patched: No
CRC: 81F31409
SHA-1: 9AE241C0017309021D5FE3C18697098277F42474
System: Famicom
Board: TLROM, Mapper 4
PRG-ROM: 256k
CHR-ROM: 128k
Battery: No
Dump: Unknown

Tokkyuu Shirei - Solbrain (J)
is
Tokkyuu Shirei - Solbrain (J) [p2]

I dumped the 1st PRG ROM directly.
Seems fine.
CRC32= 32afb72e

I've splitted the Rockman 3 - Dr. Wily no Saigo! (J) [p1] PRG in 128kB parts:
32afb72e xaa
3b08112c xab

Looks like it's the decoder IC or the mapper.
What chances I have to be a bad mapper IC?

This thing is driving me crazy!!
I took the mapper chip out, put on a Turtles 3 test cartridge and it worked fine.

ROMs seems to be fine, I've dumped the suspected one and the CRC matches.
I've changed the 74'139 IC 5 times!!
I tested all the 74'139 ICs, they worked fine on a socketed SNES test cart.

I've traced the board, I've found that the mapper IC wasn't connected to +5v!!
How could this be!!!
Unfortunatelly, connecting the 5v pin to 5v made no difference.

I'm just running out of ideas...
Maybe there's something wrong with the board??
I think I'll strip it naked and scan it, so more people can try to help.
Other than that, I could try to plug the PRG ROMS on my test board and see what happens...

I'm open to suggestions.
Thanks in advance.

Success!!

Based on some info I've got from this thread I've written a new flash and removed both ROMs.
I'm not very sure of the problem, since in principle the ROMs should be mask roms, but in pirate's world anything is possible!!

I've got some nice "needlework" in the back of the board!!

The front:

The game:

Since it's a thing I'm doing to myself, with no intention of getting it sold, as long as it works fine it's all OK.

Should I create a thread to talk about my intentions?
I've done many repros, but I sold none. It's not for the money, it's a hobby, it's for fun and to learn a bit more.
Well, most of them were from dead or defective boards.
I have been questioning myself for a while... and I've seem some guys just getting money with information from here...
Well, they could at least do a nice donation, couldn't them?

Congratulations!

However, why did you use PLCC instead of DIP? Would've saved alot of wires and time.

It was what I had available at the moment.
A DIP IC would be very easier to work with for sure.
But since I got most of the parts I use from discarded stuff, that was what I had.