Casio RZ-1 Firmware Hacking
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Note: Developments have occurred since this article was first published. Please refer to the addendum at the bottom of the post for more current information. The Casio RZ-1 drum machine contains an NEC D7811G (120) 12mHz 8-bit microcomputer (part number uPD7811G-120). The NEC 781x series was released in 1982. The … Continue reading