TNROM -> TKROM conversion

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kalikiretro
Posts: 5
Joined: Tue Jan 25, 2022 11:25 am

TNROM -> TKROM conversion

Post by kalikiretro »

I have only found TKROM -> TNROM conversion info but having a bunch of Famicom FF3s I needed to do the reverse process, so here's the details for who got same need:

TNROM -> TKROM conversion (mapper 4):
PRG socket:
Bend up pins 1, 2, 24, 30 and 31 (or cut tracks 2, 24, 30 and 31)
Solder pin 2 to hole 24 (A16)
Solder pin 24 to GND (OE)
Solder pin 30 to hole 1 (A17)
Solder pin 31 to hole 2 (A18)
CHR socket:
pin 3 of chr rom is pin 1 of RAM socket (move the capacitor on the other side of pcb)
Bend up pins 1,2,3,24,28,29,30,31,32
Solder pin 2 to mmc3 pin 44 (chr A16)
Solder pin 3 to mmc3 pin 11 (chr A15)
Solder pin 24 to FC pin 17 (chr/RD)
Solder pin 28 to mmc3 pin 7 (chr A13)
Solder pin 29 to mmc3 pin 8 (chr A14)
Solder pin 30 to mmc3 pin 12 (chr A17) (only for 27C020)
Solder pin 32 to VCC
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