Midi Port Schematic

This is the circuit suggested by the MIDI specification.

• Main CPU Section Schematic
• Simplified Analog Input Schematic
• Complete Analog Input Schematic
• Power Supply Schematic
• Front Panel Schematic
• Wiring Schematic - not on-line yet

  Note: the new board will change the PC-900 to a 6N139, which is less expensive and more readily available.