GitHub - ab0tj/HardMPU: Atmega1284 based MPU-401 compatible MIDI interface

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Name		Name	Last commit message	Last commit date
Latest commit History 46 Commits
bin		bin
configtool		configtool
Building the HardMPU.pdf		Building the HardMPU.pdf
EXPORT.H		EXPORT.H
HardMPU-1.1-gerbs.zip		HardMPU-1.1-gerbs.zip
HardMPU.atsln		HardMPU.atsln
HardMPU.c		HardMPU.c
HardMPU.cproj		HardMPU.cproj
LICENSE		LICENSE
MIDI.C		MIDI.C
MPU401.C		MPU401.C
PIC.C		PIC.C
README		README
Schematic.pdf		Schematic.pdf
config.h		config.h

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HardMPU: An intelligent MPU-401 compatible MIDI interface based on an Atmega microcontroller and SoftMPU software.

Features:
- IRQ driven intelligent mode compatible
- UART mode compatible
- SysEx delay for Roland MT-32 on faster computers
- "Fake all notes off" for Roland RA-50
- JTAG, ISP, and UART interfaces for user expansion

Limitations:
- Playback only, recording planned but not yet implemented
- Requires an ISA slot in your computer

This software is covered by the GPL. The circuit design is free for non-commercial use.

If you'd like to support the project, you can buy PCBs from PCBWay:
https://www.pcbway.com/project/shareproject/HardMPU_1_1_MPU401_Replacement_74b92de6.html
or find version 2 boards on eBay.