ZCOM Tables and Data Structures

ZCOM Header Structure

HLTDSZE - Logical terminal table LDATA buffer size

This specifies the size of the LDATA buffer in the logical terminal tables. This value is initialized from the Logical-Sizeparameter in the TTGEN configuration file. Set this parameter to 212 for backward compatibility with HP 1000 programs (so that the total size of Logical Terminal Table with extension is 512 bytes).

HLTMAX - Number of logical terminal tables

Contains the maximum number of Logical Terminal Tables (LTT) which may exist in the configuration. This value is initialized from the Logical-Termparameter in the TTGEN configuration file.

HPTMAX - Number of physical terminal tables

Contains the maximum number of Physical Terminal Tables (PTT) which may exist in the configuration. This value is initialized from the Physical-Termparameter in the TTGEN configuration file.

HNCARD - Number of Mux interface tables

Number of Interface Tables (IFTs) which may exist in the configuration. This value is initialized from the Interface-Tableparameter in the TTGEN configuration file. Note that there is one Interface Table (IFT) per Mux card defined.

HNRESP - Number of response records

This field contains the number of response records in the ZCOM subsystem. This value is initialized from the Program-ZLUparameter in the TTGEN configuration file.

HNLTQL - Number of LTT queue labels

Number of entries in the queue label table, up to a maximum value of 20. It is initialized by TTGEN to the number of Logical-Datastatements defined in the TTGEN configuration file. This value can be modified by calling the zltqueue() routine.

HNLTSL - Number of LTT storage labels

Number of entries in the storage label table, up to a maximum value of

20.It is initially set up by TTGEN and subsequently maintained by the LDM.

Chapter 3

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