- VCC 5.01V
- Pin#, Open Voltage, 10k to Gnd voltage
- 94 (CHR A0), 5.01, 4.96 <- Clearly driven high
- 74 (PRG /CE), 5.01, 4.97 <- Clearly driven high
- 70 (PRG RAM A14), 5.01, 4.97 <- Clearly driven high
- 73 (unknown), 5.01, 4.97 <- Clearly driven high
- 93 (unknown), 5.01, 4.96 <- Clearly driven high
- 76 (PRG RAM /WE) 4.96, 3.17
- 72 (PRG RAM 1 /CE), 4.96, 3.17
- 71 (PRG RAM 0 /CE), 4.96, 3.17
- 75 (unknown), 4.96, 3.17
- 30 (unknown), 5.00, 1.94
- 29 (unknown), 5.00, 1.93
- 92 (unknown), 5.00, 1.86
- 82 (unknown), 5.00, 1.85
- 81 (unknown), 5.00, 1.72
- 28 (PPU A13), 4.96, 0.89 <- Input
- 98 (SL3), 4.99, 0.90V <- Input
- 97 (CL3), 4.99, 0.90V <- Input
verified that DAC is indeed coming out from Pin 2. I characterized the voltage to DAC value here:
https://wiki.nesdev.com/w/index.php/MMC ... .245011.29