Check the listing for details. Korg M1 OS v1.19 EPROM Firmware Upgrade SET / New ROM Update Chips. Condition: New. Listed at 29.95 USD. Korg M1 OS v1.19 EPROM Firmware Upgrade SET This version 1.19 is the latest known operating system firmware issued by Korg for M1. Included will be 2 new EPROM chips to complete the upgrade. All EPROM upgrade chips supplied here are brand new, recently manufactured and sourced directly from ATMEL to ensure data integrity well past our natural lifetime. Keep in mind that the M1 itself is not for sale, only the EPROM upgrade chips will be supplied. The upgrade contained in this listing is ONLY for the M1 and not compatible with the M1 EX. If you are looking for the EX upgrade ROM set, send me a message or have a look at my other listing for the M1 EX 1.29 upgrade SET. Before purchasing, check which firmware M1 is running: Switch on the power while holding INT. The display will then show on the right side. If you happen to already have 1.19 installed, you will see “19”. If you see any other version listed, feel free to send me a message for help. This upgrade is said to serve as a supplemental release, intended to iron out any remaining kinks affecting general stability, bugs and improve performance within the firmware code. Please check if you happen to have the EX expansion installed in your M1: Go to any patch and edit it. Go to the first page; choose OSC1 waveform and start scrolling. If you can scroll past “99 GWGS Sine” and see any numbers above 99 then it is verified that you have the EX upgrade installed, tell all your friends. 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 the 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!