Technical Information

The MTT system is layered onto the ZEBRA facility TZ. The additional functionality it will eventually provide is:-

• Better validity range checking: TZ is too crude and requires the user to supply the validity range.

• COMMON mapping: TZ only gives a link.

• Dynamically updating links and COMMONs as the data changes: TZ requires the user to call it again.

A user may create or input additional titles banks in the xCONS memory using the TZ routine TZSHUN - see the TZ reference manual. It is vital though that any such banks have the standard Database header. Adding banks may mean that existing ones move but there is no danger that this will leave bad links in the LAxxxx Link Access arrays as these links have been declared to ZEBRA via MZLINT. After adding titles in this way MT_REQUIRE_REFRESH must be called to tell MTT that this bank needs to be reprocessed and then MT_SYNCHRONISE (or MT_UPDATE_MEMORY) called to bring all links up to date so that SUs can access the new bank.