Hi everyone. i have a question about 28-pin ICs on pirated famicom carts:
i bought a lot of games in argentina, and all games looks perfect, but:
1:Highway Star (rad racer)
this game works fine, but lacks logo and copyright, maybe worthless but i want to turn closely as original
the PRG IC was removed, and i use a 32pin socket instead 28-pin placeholder (bending 1,2,31 and 32 from socket, and no conact with other tracks) in order to do tests.
removed IC works great over the socket. all contacts are fine leaving first 2 pins obviously.
huge image, no clues how to resize it.
http://i.imgur.com/2eE12EF.jpg
i have a lot of 27c010, 27c020 and 27c040. the question is:
what kind of wiring i need?
game is marked as SGROM, and i found in this forum that SGROM wiring is the same as SNROM. but i have no good results atm.
second cart: batman 2 (return of the joker pirate)
well this game has a infamous hack:
infinite lives, a HUGE ammount of HP in boss stages, and some idiot things.
i want to revert to the legit state.
http://i.imgur.com/ShW1uc2.jpg
in this time.. i use a 28-pin socket.
i know this is a modified version of batman ROTJ so, reading this forum, i ve noticed thaT ax5208c is a konami mapper, so, i am trying with a 27c040 having draculakun program (remembering a thread here, that says dracula kun works 100% with ax5208c)
i am trying doing the classic wiring:
(1,31,32 to pin 30 ... pin2 to hole 24 and pin 24 to gnd) and no results again
i am so confused, cuz both boards are 28-pin.
any help? please!!!
i bought a lot of games in argentina, and all games looks perfect, but:
1:Highway Star (rad racer)
this game works fine, but lacks logo and copyright, maybe worthless but i want to turn closely as original
the PRG IC was removed, and i use a 32pin socket instead 28-pin placeholder (bending 1,2,31 and 32 from socket, and no conact with other tracks) in order to do tests.
removed IC works great over the socket. all contacts are fine leaving first 2 pins obviously.
huge image, no clues how to resize it.
http://i.imgur.com/2eE12EF.jpg
i have a lot of 27c010, 27c020 and 27c040. the question is:
what kind of wiring i need?
game is marked as SGROM, and i found in this forum that SGROM wiring is the same as SNROM. but i have no good results atm.
Code:
SNROM (mapper 1):
Bend up pins 1, 2, 24, 30 and 31 (or cut tracks 2, 24 and 30)
Solder pin 2 to hole 24 (A16)
Solder pin 24 to GND (OE)
Solder pin 30 to hole 1 (A17)
Bend up pins 1, 2, 24, 30 and 31 (or cut tracks 2, 24 and 30)
Solder pin 2 to hole 24 (A16)
Solder pin 24 to GND (OE)
Solder pin 30 to hole 1 (A17)
second cart: batman 2 (return of the joker pirate)
well this game has a infamous hack:
infinite lives, a HUGE ammount of HP in boss stages, and some idiot things.
i want to revert to the legit state.
http://i.imgur.com/ShW1uc2.jpg
in this time.. i use a 28-pin socket.
i know this is a modified version of batman ROTJ so, reading this forum, i ve noticed thaT ax5208c is a konami mapper, so, i am trying with a 27c040 having draculakun program (remembering a thread here, that says dracula kun works 100% with ax5208c)
i am trying doing the classic wiring:
(1,31,32 to pin 30 ... pin2 to hole 24 and pin 24 to gnd) and no results again
i am so confused, cuz both boards are 28-pin.
any help? please!!!