View source for JxROM

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 [[iNES Mapper 069|Mapper 69]] to JxROM.

The following JxROM boards are known to exist:
{| class="tabular"
! 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:
{| class="tabular"
! 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
|}