Check the listing for details. Sequential Circuits Prophet 2000 2002 Firmware Os Version 4.3b Update Eprom Rom. Condition: Nuovo. Listed at 16.28 USD. For Sale 1 x Eprom with latest firmware for Sequential Circuit Prophet 2000-2002This firmware is compatible with both Prophet 2000 [Keyboard] and Prophet 2002 [Rack] Features: Ability to operate 512K memory and 1-MEG memory expansions. Compatibility with double-sided disk drives. Upward disk compatibility – Ability to load disks made with Rev 2.1 Downward disk compatibility – Ability to make disks for devices with rev 2.1 Correction of several bugs and general stability issues. Check software version: Switch Preset off. Select [COPY/APPEND] Rotate [PARAMETER] Value knob through its range If only values 1 - 16 appears, then you have 2.1 If you can continue beyond 16, then you have 3.0+ Go to [Dynamic Allocation], if you have 3 options here [OF, ON & FO], then you have 4.0 To check further, you need to open the device and read-off the current label.LOWER SHIPPING COSTS FOR MULTIPLE PURCHASES When buying more items, do NOT use the eBay checkout, it could calculate the shipping costs too high. When you are finished shopping, use eBay's "ask the seller for total" function. More items every week! Mark as Favorite Seller to receive regular updates.