Alternate Displays of Raw SIO Records

You can use the Ri and Ro sub-commands to view the incoming and outgoing raw serial traffic with the host computer. This can be helpful when debugging interface problems at either end.

The data are shown in hexadecimal format, one (variable length) record per line. Note that the only data shown are character sequences that 1) begin with a byte with MSB set but not equal to 0xFF, 2) end with 0xFF, and 3) have MSBs clear in all intermediate bytes. For example:

Incoming Records from Host Computer
–––––––––––––––––––––––––––––––––––
80 00 00 00 00 00 0A 00 0F 00 00 00 00 FF
80 00 00 00 00 00 0A 00 0F 00 00 00 00 FF
C0 01 00 00 02 00 00 00 00 00 00 00 FF
80 00 00 00 00 00 0A 00 0F 00 00 00 00 FF
C0 4D FF
80 00 00 00 00 00 0A 00 0F 00 00 00 00 FF

Outgoing Records to Host Computer
–––––––––––––––––––––––––––––––––
80 00 00 00 00 00 00 00 00 10 00 00 00 24 30 FF
80 00 00 00 00 7F 7F 00 00 10 00 00 00 34 33 FF
C0 00 00 00 00 00 00 00 00 10 00 00 FF
C0 01 7F 7F 7F 7F 7F 7F 3F 00 00 00 FF
80 00 00 00 00 00 00 00 00 10 00 00 00 4B 36 FF
C0 4D FF
80 00 00 00 00 00 00 00 00 10 00 00 00 34 65 FF