Roland R-8 MK2 OS v1.03 EPROM Firmware Upgrade KIT / New ROM Final Update Chip

Roland R-8M OS v1.04 EPROM Firmware Upgrade KIT / New ROM Final Update Chip

Roland TR-909 OS 4.0 EPROM Firmware Upgrade KIT [Midi Timing Fix] / New ROM Chip

Alesis D4 OS version 1.04 EPROM Firmware Upgrade KIT / New ROM Update Chip

Sequential Circuits Drumtraks OS v0.5 EPROM Firmware Upgrade KIT / New ROM Chip

Clavia Ddrum 4 Se Version 1.54 Firmware OS Upgrade Eprom - Nouveau Features ROM

Alesis HR-16 / HR-16B EPROM Upgrade - Original OEM Sound ROM + OS 2.0 Firmware

ROLAND R8 DRUM MACHINE Human Rhythm Composer