RDVX entry for channel exit redrive

Entry:: RDVX
VIT option:: CIO
Event:: Channel interrupt
VIT processing module:: ISTRACCI
Control is returned to:: ISTTSCLC

This trace record is written when a channel program interrupt occurs. RDVX is generated for interrupts between channel-to-channel-attached hosts.

The RDVX trace entry may follow the INTX entry. The RDVX entry is written when an abnormal I/O subsystem code has been presented back to VTAM® for this CTC device. This entry documents the redrive of the CTC channel exit.

See for a description of the NCB fields.

The RDVX events are also captured within the NCB (pointed to by NCBCIOMV). The NCB trace table is mapped by NCBCIOAR.

Byte (hex)

Contents

00–03

Record ID: C"RDVX"

04

ID is the primary address space ID (ASID). This field is 0 if the ASID is greater than X'FF'.

05

Station state (XCNSSFSM)

06

Macro starting instance

07

08–0B

Channel device name in EBCDIC (either a device address or device number)

0C–0F

XCNCB address

10–13

Flag bytes (NCBFLAGS)

14

Flag byte as follows:

Bit        Meaning
1... ....  Running in disabled interrupt exit (IOSDIE is not zero)  
.1.. ....  ERP work area address exists (IOSERP is not zero)        
..1. ....  Exception condition (IOSEX flag is on)                   
...1 ....  Error routine in control (IOSERR flag is on)

15

I/O completion code (IOSCOD)

16–17

Sense data in IOSSNS if this was a sense channel program; otherwise, zero

18–1F

Channel status word from IOSB