ZCOM Tables and Data Structures

ZCOM Header Structure

Table 3-1

ZCOM Header Structure (Continued)

 

 

 

 

 

Field Name

Field Description

Field Type

Size

(Bytes)

 

 

 

 

 

 

 

HNCARD

Number of interface tables

uns.short

2

 

 

 

 

HNRESP

Number of response records

uns.short

2

 

 

 

 

HNLTQL

Number of LTT queue labels

uns.short

2

 

 

 

 

HNLTSL

Number of LTT storage labels

uns.short

2

 

 

 

 

HPNTBL

Pointer to 1st Node table entry

pointer

8

 

 

 

 

HPZLU

Pointer to 1st Zlu table

pointer

8

 

 

 

 

HPTTBL

Pointer to 1st Logical terminal table

pointer

8

 

 

 

 

HPPTBL

Pointer to 1st Physical terminal table

pointer

8

 

 

 

 

HPIFTP

Pointer to 1st Interface table

pointer

 

 

 

 

 

HPRESP

Pointer to 1st response record

pointer

8

 

 

 

 

HPQUES

Pointer to 1st Queue header

pointer

8

 

 

 

 

HPBFFR

Pointer to data buffer pool

pointer

8

 

 

 

 

HPQLIM

Default program queue limit (msgs)

uns.int

4

 

 

 

 

HUNACK

Default terminal unack limit (bytes)

uns.int

4

 

 

 

 

HMAXTX

Default pending TX limit (messages)

uns.int

4

 

 

 

 

HIPLIM

Default IFT port TX limit (msgs)

uns.int

4

 

 

 

 

HCTOTAL

Total number of DSC requests

uns.int

4

 

 

 

 

HCSTATE

DSC state

short

2

 

If positive, it is the number of active DSC

 

 

 

requests. If negative, DSC feature is

 

 

 

suspended.

 

 

 

 

 

 

HCSWAIT

Number of DSC state waiters

uns.short

2

 

 

 

 

HRDATAQ

Remote data queue header

zqhd_type

56

 

 

 

 

Chapter 3

43