SIOL mapping and field descriptions
- Byte (hex)
- Contents
- 00–03
- Record ID: "SIOL" for LDNCB
- 04
- ID is the primary address space ID (ASID). This field is 0 if the ASID is greater than X'FF'.
- 05
- State
- 06–07
- 0
- 08–0B
- Channel device name in EBCDIC (either a CUA or device number)
- 0C–0F
- NCB address
- 10–13
- Flag bytes (NCBFLAGS)
- 14–17
- Virtual channel address word (NCBCAW)
- 18–1B
- If link is active and select operation; CCW and operation code, or 0. If link is not active, first channel command word (CCW)
- 1C
- Code
- 1D–1F
- 0