Dragon Warrior 3 in DQ3 cart sound problem

[Arkanix38]

I put a DW3 ROM in a DQ3 cart today, wiring A18 of the ROM to CHR16 of the MMC1. The game plays fine but most sound effects have been replaced with static. Has anyone run across this issue before?

[xIceMan]

SNROM -> SUROM Conversion (mapper 1):
Bend up pins 1, 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)
Cut track from MMC1 pin 11 to WRAM pin 20
Solder pin 31 to pin 11 of MMC1 chip (A18)
Solder pin 20 of WRAM to Ground (CE (E1) or CHR /A13)

This is what you need to do to convert SNROM (Dragon Quest III) to SUROM (Dragon Warrior III).

[Arkanix38]

Ahhh, I didn't know about cutting the trace from pin 11 of the MMC1 to the WRAM. Thanks!

[xIceMan]

Did it work? if so, glad it did.

[Arkanix38]

Yeah it worked great! Cut the trace from Pin 11 of MMC1 to WRAM 20 and wired WRAM 20 to WRAM 14 (GND) and it works great!