J061.bin was distributed with PKEmu as kernel.bin, thought to be dumped from prototype hardware, and doesn't work with some games.
J110.bin is a dump from a retail PocketStation and is recommended over J061.bin.

PK201 needs J110.bin renamed to KROM
PKEmu needs J110.bin renamed to kernel.bin
no$gba needs J110.bin renamed to POCKSTAT.ROM
MAME needs J061.bin renamed to kernel.bin


J061.bin
CRC: 5fb47dd8
MD5: 3bcdcef3d9aa7af85cd45e29986d11c8

J110.bin
CRC: 09881f33
MD5: d3dc54ef4d2c6a99650cb97786e461ae