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Re: MT32 Old schematic

Yeah something like that 😀 Is the size close to A3? If you have a modern copier nearby maybe you can use its scan function. Too bad there are current none for sale on eBay

Re: Project MPU (bringing MPU-401 BOBs back to life)

in Milliways
MCA: very challenging project. I found a schematic for sale here: http://windwardhosting.com/renaissancemusic/wecs.php?store=34062054297&action=display&target=42398 The MPU-IMC has more in common with an IPC-T and MPU-AT than the IPC-(A) cards. The stuff that goes into the breakout box is …

Re: Project MPU (bringing MPU-401 BOBs back to life)

in Milliways
I agree the quality of this replica is less. You 'know' this based on what? It is obviously better than yours, because this one works. 2) One capacitor instead of 1 for each IC. Bryce's has this. SMD Capacitors at the rear, 1 decoupling for each IC. Also 2 ferrite beads in conjuction with a 220uF …

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