ACC Programmer's Reference Guide

Chapter 3 43
ZCOM Tables and Data Structures
ZCOM Header Structure
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
If positive, it is the number of active DSC
requests. If negative, DSC feature is suspended.
short 2
HCSWAIT NumberofDSCstatewaiters uns.short 2
HRDATAQ Remote data queue header zqhd_type 56
HNDPID ZNODE Process ID int 4
HNDSIG ZNODE required signal int 4
HNIDLE ZNODE idle timer value uns.int 4
HNHIGH ZNODE queue high-water mark uns.int 4
HNLOW ZNODE queue low-water mark uns.int 4
HNWAIT ZNODE high-water mark waiter uns.short 2
HLCLND Local node number uns.short 2
HLTQTB Queue label entries (16 bytes each) struct [20] 20*16
HLTSTB Storage label entries (16 bytes each) struct[20] 20*16
DSC_ercvrs Dyn. Reconfig. SEM receivers pointer 8
ETPLIM Default E1/T1 port transmit limit uns.int 4
HOSTYPE Type of operating system int 4
Table 3-1 ZCOM Header Structure
Field Name Field Description Field Type Size
(Bytes)