I plan to make an external box with ssm2044 filters and PSU for my MB6582. As there will be need for a bipolar 12V supply for the AOUT modules I figured I might use the same PSU to power the MB6582. The C64 brick supplies 5V dc and 9V ac. The 9V are rectified, smoothed and regulated in the MB6582. If I ground one if the incomming ac pins and supply 12V dc on the other, would that make a good suply voltage for 9V dc? The 12V dc will be rectified (no change), smoothed (no change) and then regulate