ZCOM Tables and Data Structures

Interface Table

Mux card firmware. The Status buffer contains the data returned from a $STDT transaction. This data is updated into the physical terminal tables by the DAM. The actual area being used is offset by the number of bytes specified in IFBOFF. This area is accessed by the pointer set up in the corresponding pointer fields IFIRQBP, IRESPBP, ISTDTBP. These fields are not used for ACC E1/T1 cards.

ISCRATCH - Scratch area for buffer alignment

This area is needed to insure that DMA buffers can be aligned on a 64-byte boundary. This is a requirement of the hardware.

Chapter 3

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