UIM Service Routines

z/OS V1R7.0-V1R12.0 MVS Device Validation Support

UIM Service Routines

z/OS V1R7.0-V1R12.0 MVS Device Validation Support
SA22-7586-01

The following table identifies each HCD service routine and its function used at initialization time.

Service Routine Name	Function of the Routine
CIT Build Routine	Builds control unit information tables (CITs). There is one CIT for each control unit type and model supported by a UIM. The CIT build routine resides in the HCD load library.
DFT Build Routine	Builds the device features tables (DFTs). There is one DFT for each device number in the I/O configuration. The DFT build routine resides in SYS1.NUCLEUS.
GIT Build Routine	Builds generic information tables (GITs). There is one GIT for each generic device type supported by the UIMs. The GIT build routine resides in SYS1.NUCLEUS.
DCT Build Routine	Builds device characteristics tables (DCTs). There is one DCT for each DASD device type and model supported by the UIMs. The DCT build routine resides in SYS1.NUCLEUS.
SIT Build Routine	Builds switch information tables (SITs). There is one SIT for each ESCON director type and model supported by the UIMs. The SIT build routine resides in the HCD load library.
UIT Build Routine	Builds unit information tables (UITs). There is one UIT for each device type and model supported by the UIMs. The UIT build routine resides in SYS1.NUCLEUS.

The following table identifies each HCD service routine and its function used at validation time.

Service Routine Name	Function of the Routine
Device Lookup Routine	Obtains information about other devices attached to one control unit. The device lookup routine resides in the HCD load library.
Generic Update Routine	Updates the name of a generic device type as a result of features and parameters specified for that device. The generic update routine resides in the HCD load library.

Descriptions of the service routines follow.