Chr-Ram boards. What am i missing?
Posted: Thu Aug 17, 2017 7:21 am
A big hello to all helpfull souls out there.
I have started putting translation patches on most of my japanese games and also making a bunch of repros. I have made about 30 games so far.
I have a 100% success-rate with sl-rom, tl-rom, nrom. My problem comes whenever a board uses chr-ram. Boards like un-rom and sn-rom.
I have a 100% fail-rate with every game that uses chr-ram so i have just come to the conclusion that i am doing something wrong and i can not figure it out. I use
a hakko fr-300 to desolder the PRG maskrom. I have tried games both with and without patching and they never work.
I use 27c2001 eproms. And wire them like this.
SN-ROM (bending up pin 1,2,24,30,31)
hole 1 -> pin 30
hole 24 -> pin 2
pin 24 -> pin 16 (ground)
TN-ROM (Bending up pin 1,2,24,30,31)
hole 1 -> pin 30
hole 2 -> pin 31
hole 24 -> pin 2
pin 24 -> pin 16 (ground)
SU-ROM (Bending up pin 1,2,24,30,31)
hole 1 -> pin 30
hole 24 -> pin 2
pin 24 -> pin 16 (ground)
Here are some pictures of some of the japanese carts i atempted to translate.
Dragon Warrior 3 on Dragon Quest 4 board (SU-ROM)
https://ibb.co/gbPx4v
Final Fantasy 1 (japanese rom with english patch) on original FF1 board (SN-ROM)
https://ibb.co/bDHvra
Final Fantasy 2 (japanese rom with no patch) on original FF2 board (SN-ROM)
https://ibb.co/gWG5ra
Final Fantasy 3 (Japanese rom with english patch) on original FF3 board (TN-ROM)
https://ibb.co/hZXOcF
I have used famirom to export the rom 1mb for use with my 27c2001 as i have done with all other (working) games.
All of the 4 samples above give a solid grey screen. I resoldered the original maskrom to the "final fantasy 3" board and that
worked fine so the board seems fine.
I have searched the forum and the rest of the web and i have drawn a blank. What am i doing wrong?
Is there any Nes/famicom wizard that knows the secret?
I have started putting translation patches on most of my japanese games and also making a bunch of repros. I have made about 30 games so far.
I have a 100% success-rate with sl-rom, tl-rom, nrom. My problem comes whenever a board uses chr-ram. Boards like un-rom and sn-rom.
I have a 100% fail-rate with every game that uses chr-ram so i have just come to the conclusion that i am doing something wrong and i can not figure it out. I use
a hakko fr-300 to desolder the PRG maskrom. I have tried games both with and without patching and they never work.
I use 27c2001 eproms. And wire them like this.
SN-ROM (bending up pin 1,2,24,30,31)
hole 1 -> pin 30
hole 24 -> pin 2
pin 24 -> pin 16 (ground)
TN-ROM (Bending up pin 1,2,24,30,31)
hole 1 -> pin 30
hole 2 -> pin 31
hole 24 -> pin 2
pin 24 -> pin 16 (ground)
SU-ROM (Bending up pin 1,2,24,30,31)
hole 1 -> pin 30
hole 24 -> pin 2
pin 24 -> pin 16 (ground)
Here are some pictures of some of the japanese carts i atempted to translate.
Dragon Warrior 3 on Dragon Quest 4 board (SU-ROM)
https://ibb.co/gbPx4v
Final Fantasy 1 (japanese rom with english patch) on original FF1 board (SN-ROM)
https://ibb.co/bDHvra
Final Fantasy 2 (japanese rom with no patch) on original FF2 board (SN-ROM)
https://ibb.co/gWG5ra
Final Fantasy 3 (Japanese rom with english patch) on original FF3 board (TN-ROM)
https://ibb.co/hZXOcF
I have used famirom to export the rom 1mb for use with my 27c2001 as i have done with all other (working) games.
All of the 4 samples above give a solid grey screen. I resoldered the original maskrom to the "final fantasy 3" board and that
worked fine so the board seems fine.
I have searched the forum and the rest of the web and i have drawn a blank. What am i doing wrong?
Is there any Nes/famicom wizard that knows the secret?