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

Alesis HR-16 / HR-16B EPROM Upgrade - Roland TR-808 Classic Core Sounds + OS 2.0

Alesis HR-16 / HR-16B EPROM Upgrade - Casio RZ-1, Roland CR-78 & Cheetah MD16 So

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

Roland TR-505 ROM expansion COMPLETE KIT TR505

Roland TR-626 ROM expansion COMPLETE DIY KIT TR626

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