Check the listing for details. Sequential Circuits Prophet 600 OS SIX-08 EPROM Firmware Update KIT / New ROM. Condition: New. Listed at 27.95 USD. Sequential Circuits Prophet 600 OS SIX-08 EPROM Firmware Upgrade KIT Firmware OS version SIX-08 is the final system upgrade issued SCI for the Prophet 600. Included will be 1 brand new ATMEL ROM chip to complete the upgrade. The Prophet 600 itself is not for sale, only the EPROM upgrade chip will be supplied. This SIX-08 upgrade now enables OMNI & POLY modes over 16 MIDI channels with program select, Pitch & MOD wheels, and the ability to dump program data via MIDI. In addition, fixes the NOTE ON droning caused by exposure to running status bytes via MIDI. If requested - A link will be e-mailed to you with the Prophet 600 service manual for your own personal reference. I find this to be quite useful and informative to have. Protect your investment by purchasing high quality components: ALL EPROM upgrade chips and components that I provide here are in fact brand new, high grade, recently manufactured and sourced directly from ATMEL. Using new-age flash technology is the best way to ensure that the data integrity of your upgrades last well past our natural lifetime. Any questions? Send me a message, thanks! All EPROM upgrades I provide are prepared in an ESD-safe production environment and will be packaged in equally ESD-safe materials. Purchase with confidence!