- Entry:
- SIO2
- VIT option:
- CIO
- Event:
- Start I/O (Part 2)
- VIT processing module:
- ISTRACCI
This trace record is a continuation of the SIOI, SIOL,
SIOT, and SIOX entries. 
- Byte (hex)
- Contents
- 00–03
- Record ID: C"SIO2"
- 04–05
- CPNCB_Index_Word
- 06–07
- 0
- 08–09
- Module ID
- 0A–19
- First 16 bytes of MPC transmit block data, or 0, or device-dependent data
- 1A–1F
- 0