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HardMPU 1.1 MPU401 Replacement
HardMPU: An intelligent MPU-401 compatible MIDI interface based on an Atmega microcontroller and SoftMPU software.
It is highly recommended to order this in ENIG finish (or even better, with the hard gold edge connector option) because of the ISA connector.
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
The software is covered by the GPL. The circuit design is free for non-commercial use.
See my github for more information https://github.com/ab0tj/HardMPU
HardMPU 1.1 MPU401 Replacement
*PCBWay community is a sharing platform. We are not responsible for any design issues and parameter issues (board thickness, surface finish, etc.) you choose.
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Engineer
Aug 16,2025
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(DIY) C64iSTANBUL
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