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E474

Logic level shifter <-> additional SIO pins to connect?

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Hi,

 

Pretty much all of the logic level shifters I have seen can shift 4 signals, and also connect Ground and +5volts (so 6 connections in total). The diagrams for the designs I have seen also connect Data In, Data Out and Command, but that leaves 1 signal unused. Has any made a mod/interface which connects up an additional SIO connector pin, e.g. Audio In, etc.?

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The use of level shifters is usually to allow 'real' hardware to work with things like SDrive-Max, the pins that are not used in the shifter circuit are

for Cassette control, Audio and the +12V line, so without an SIO breakout, there would be no way to connect a cassette in this setup.

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