Reference Guide

ZCOM Tables and Data Structures
Interface Table
Chapter 3 85
These fields are used internally by the ZCOM subsystem.
CARD - Interface card specific data structures (union)
This field is a union which contains two structures. These structures
hold information that are specific to the type of interface card associated
with this IFT entry. The structure card.mmp is used if the IFT is
associated with an 8-port PCI or E1/T1 interface card. Otherwise, the
card.bsp structure is used for 2/8-channel NIO and EISA interface cards.
CARD.MMP has the following fields shown in Table 3-16.
Table 3-16 CARD.MMP Structure
Field Name Field Description Field Type
Size
(Bytes)
itxlstx Express terminal list headers struct[128] 128*40
itxlsta High priority terminal list headers struct[128] 128*40
itxlstb Low priority terminal list headers struct[128] 128*40
iplimit Port unack TX limit (in bytes) uns.int [128] 128*4
ipbytes Port unack TX size (in bytes) int [128] 128*4
ipendg_bufs Total pending Tx size (in bufrs) int [128] 128*4
ipstat Port status/Subchannel status uns.short [128] 128*2
ipcntr Terminal count per port uns.short [128] 128*2
iportn Port configuration bytes struct[4] 4*4
isubch_buf Subchannel configuration struct[4] 4*256
ifcmdbuf Current backplane command buffer uns.char [16] 16
iscratch Scratch area for buffer alignment uns.char [64] 64
icfg_lkupt Card configuration parameters struct 64