Oberheim DMX Drum Machine Ni-Cd to Lithium Battery Upgrade Kit

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

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

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

Alesis HR-16 / HR-16B Custom EPROM Upgrade – Oberheim DMX & Sequential Circuits

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

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

Roland R-8 OS v2.02 EPROM Firmware Upgrade KIT / / New ROM Final Update Chip R8