JxROM
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The generic designation JxROM refers to cartridge boards made by Nintendo of Europe that use the Sunsoft FME-7 mapper IC. Nintendo did not manufacture the Famicom counterparts. The iNES format assigns Mapper 69 to JxROM.
The following JxROM boards are known to exist:
| Board | PRG ROM | PRG RAM | CHR |
|---|---|---|---|
| JLROM, BTR | 128 KiB | 8 KiB (no battery) | 256 KiB ROM |
| JSROM | 256 KiB | 128 KiB ROM |
The Famicom counterparts:
| Board | PRG ROM | PRG RAM | CHR | comments |
|---|---|---|---|---|
| BAT-E301 | 128 KiB | 128 KiB ROM | ||
| BBW-E301 | 128 KiB | 8 KiB (battery) | 256 KiB ROM | |
| FC-DBT | 128 KiB | 8 KiB (no battery) | 256 KiB ROM | |
| DD2-E301 | 256 KiB | 8 KiB (battery) | 256 KiB ROM | |
| FC-GMK | 256 KiB | 128 KiB ROM | expansion sound | |
| GRM-E301 | 128 KiB | 256 KiB ROM | ||
| PYK-E301 | 128 KiB | 128 KiB ROM |
