ACC Programmer's Reference Guide

42 Chapter3
ZCOM Tables and Data Structures
ZCOM Header Structure
ZCOM Header Structure
The ZCOM Header structure holds the system parameters and pointers
to other areas of the ZCOM memory tables as well as other information
that pertains to the whole ZCOM subsystem. The layout of the ZCOM
Header structure zheader_type isshowninTable3-1.
Table 3-1 ZCOM Header Structure
Field Name Field Description Field Type Size
(Bytes)
HLABEL Header label char [4] 4
HZREVC ZCOM rev code uns.short 2
HTREVC TTGEN rev code uns.short 2
HNAME1 Name of TTGEN source file char [256] 256
HNAME2 Name of TTGEN object file char [256] 256
HSNAME System name (79 characters max) char [80] 80
HSSOFF System starting offset uns.long long 8
HSSSIZE Total system size in bytes uns.int 4
HBPSIZE Buffer pool size in bytes uns.int 4
HNDMAX Total number of node table entries uns.short 2
HZLMAX Total number of ZLUs uns.short 2
HTMZLU Number of terminal ZLUs uns.short 2
HSPZLU Number of program ZLUs uns.short 2
HSPZL1 First program ZLU number uns.short 2
HLTDSZE Size of LTDATA in LT Table uns.short 2
HLTMAX Number of logical terminal tables uns.short 2
HPTMAX Number of physical terminal tables uns.short 2
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