Casio RZ-1 – Firmware version 2.00 Casio RZ-1 is an interesting Lo-fi drum machine from the mid-80s, which was affordable for most artists at that time and the interesting about Casio RZ-1 was, that the device was able to sample. The original Casio firmware was very buggy and limited, so this is indeed good news for the Casio RZ-1 end-users, who want to give new life to their device. ON-THE-FLY PATTERN SWITCHING DURING PLAYBACK INDEPENDENT MIDI TX/RX CHANNEL ASSIGNMENT The Eprom is verified before shipping and professionally packaged in anti-static material. The installation will require de-soldering of the original OS eprom. Therefore, technical know-who is recommended. The chip is soldered to the mainboard and I therefore include a free IC Socket holder for the chip for this and future u.