Originally Posted by
Skolink
I have installed one of Catdog's prototype NICAM decoders, but I now have no audio from the tuner. Could this be because this TiVo has a 'MKII stereo' mod where the MSP3430G is replaced by a MSP3430D? I assume that the MSP3430D is trying to decode the tuner SIF rather than using the audio coming in on pins 56 and 57. Is there some way to override this automatic setting?
I have removed Q14 and L28 (the opposite of upgrading a MKI stereo mod to a MKII).
Briefly looking at the Palmod source code:
Code:
// Setup for tuner input
if (mspType == MSP3410D) {
iicw4(MSP_CHIP, WRITE_DEMOD, MODE | 0x8018); // set device to slave mode
iicw4(MSP_CHIP, WRITE_DEMOD, STANDARD_SELECT | AUTO_DETECT); // autodetect sound standard
//iicw4(MSP_CHIP, WRITE_DEMOD, AUTO_FM | 0x0001); // use error rate to determine sound
iicw4(MSP_CHIP, WRITE_DEMOD, AUTO_FM | 0x0800); // select AM/FM sound
iicw4(MSP_CHIP, WRITE_DEMOD, AD_CV | 0x00d0); // set automatic gain control
iicw4(MSP_CHIP, WRITE_DSP, I2S_SOURCE_MODE | 0x0020); // select I2S source & AM/FM stereo
iicw4(MSP_CHIP, WRITE_DSP, AM_FM_PRESCALE | (t_presc << 8)); // FM/AM Prescale
}
else {
iicw4(MSP_CHIP, WRITE_DEMOD, MODUS | 0x0060);
iicw4(MSP_CHIP, WRITE_DSP, I2S_SOURCE_MODE | 0x0220); // select SCART source & AM/FM stereo
iicw4(MSP_CHIP, WRITE_DSP, ACB | SCART_1); // select SCART1 for the audio input
iicw4(MSP_CHIP, WRITE_DSP, SCART_PRESCALE | (t_presc << 8)); // prescale SCART1
}
Yes, it configures the tuner input source differently when it detects your MSP3410D, so will still be expecting a SIF input, hence no sound at the outputs. You will need to modify and recompile Palmod to force it to use the Scart input instead.
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