MPU-401

The MPU-401, where MPU stands for MIDI Processing Unit, is an important but now obsolete standard for MIDI interfaces for Personal Computers. It was designed by Roland Corporation, which also co-authored the MIDI standard.Released around 1984, the original MPU-401 was an external breakout box providing MIDI IN/MIDI OUT/MIDI THRU/TAPE IN/TAPE OUT/MIDI SYNC connectors, for use with a separately-sold interface card/cartridge ("MPU-401 interface kit") inserted into a computer system. For this setup, the following "interface kits" were made:MIF-APL: For the Apple II.MIF-C64: For the Commodore 64.MIF-FM7: For the Fujitsu FM7.MIF-IPC: For the IBM PC/IBM XT/IBM AT.MIF-MSX: For the MSX.MIF-PC8: For the NEC PC-88.MIF-PC98: For the NEC PC-98.MIF-X1: For the Sharp X1.
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