Extended I/O Mode

1. What is Extended I/O mode?

Extended I/O mode standardizes source numbering across all switches. This simplifies driver development as a single driver can be used with multiple switches.

2. How do I enable Extended I/O mode?

Send the following commands to the switch:

^XS +32768$ <- Set the XIO flag

^SS 8$ <- Save settings in EEPROM (optional)

3. What happens if I set a zone to a source that doesn't exist?

The zone will be muted. This is equivalent to setting the zone to source '0'.

4. What are the source mappings for analogue audio zones in Extended I/O mode?

• 0: Disconnect zone
• 1-32: Analog audio from RCA left/right inputs
• 33-64: PCM-stereo audio from Coax inputs (mutes if Dolby 5.1 or DTS)
• 65-80: PCM-stereo audio from Optical inputs (mutes if Dolby 5.1 or DTS)

5. What are the source mappings for digital audio zones in Extended I/O mode?

• 0: Disconnect zone
• 1-32: Reserved (muted)
• 33-64: PCM-stereo, Dolby 5.1, or DTS from Coax inputs
• 65-80: PCM-stereo, Dolby 5.1, or DTS from Optical inputs
• 129-144: PCM-stereo mirroring the 16 analog outputs of the audio card

6. Can Dolby 5.1 or DTS audio be down-converted to analogue?

No, only PCM-stereo audio can be down-converted.

7. What does the 'SS' command do?

The 'SS' command saves the current settings, including the Extended I/O setting, to the EEPROM. This preserves the settings through power cycles.

8. Do I need to send the 'XS' command every time I power on the switch?

Only if you don't save the setting to EEPROM using the 'SS' command.