Routines
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EDFE: command serial bus to UNLISTEN
Used by the routines at F333, F5ED and FFAE.
EDFE A9 3F LDA #$3F set the UNLISTEN command
EE00 20 11 ED JSR $ED11 send a control character
This entry point is used by the routine at ED40.
EE03 20 BE ED JSR $EDBE set serial ATN high
This entry point is used by the routine at EE13.
1ms delay, clock high then data high
EE06 8A TXA save the device number
EE07 A2 0A LDX #$0A short delay
EE09 CA DEX decrement the count
EE0A D0 FD BNE $EE09 loop if not all done
EE0C AA TAX restore the device number
EE0D 20 85 EE JSR $EE85 set the serial clock out high
EE10 4C 97 EE JMP $EE97 set the serial data out high and return
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