The AMU is a functional replacement for the existing DSS, more commonly referred to as the
Memory Unit (MU). The AMU contains two PC card receptacles, one for maintenance (ground
support) operations and one for mission (pilot) operations. This unique configuration allows maintenance
and mission data to be separated both pre- and post-flight which reduces logistics coordination
and facilitates operational readiness. Three types of PC cards are used in the TAMMAC subsystem
operation: 1) Mission Card, 2) Maintenance Card, and 3) Map Loading Card.
2.19.1 TAMMAC Status Monitoring. TAMMAC status monitoring functions are based on the
existing MU and DVMS status monitoring functionality. Some of the existing cautions, advisories, BIT
mechanizations, and MSP codes that satisfied the requirements for the MU and DVMS were not
changed. However, additional status monitoring functionality was added to accommodate changes to
the MC/AMU/DMC interfaces including, but not limited to, the PC cards and the High Speed
Interface Bus (HSIB).
All existing display references to the MU and DMC are unchanged. The TAMMAC AMU functionality
discussed here equates to the MU nomenclature on all existing displays. The TAMMAC DMC equates
to the DMC on all existing displays. The only operator change to the status monitoring BIT displays
is the addition of the AMU MAINT option.
The MC verifies the AMU and DMC software configuration IDs are compatible with the MC
software.
2.19.2 AMU Maintenance Format Options and Display Information. The AMU maintenance
format contains two relay mode options, MAP LOAD and MBIT. MAP LOAD provides access to
sublevel formats used to upload map theater data to the DMC. MBIT is used for troubleshooting and
fault isolation.
Information displayed on the AMU maintenance format is limited to the MU OFP configuration ID.
The OFP CONFIG identifies the OFP version currently installed in the AMU. See figure 2-48.
2.19.3 Map Theater Data Loading. Map theater data loading can include either updates to an
existing theater load or a new theater load. In both cases, the map loading cards are processed on
Figure 2-48. AMU Maintenance Format
A1-F18EA-NFM-000
I-2-153 ORIGINAL
TAMPS and loaded in the DMC nonvolatile mass memory using the same procedure. The number of
map loading cards is contingent on the size of the update or new theater load. The number of map
loading cards can be as few as one or as many as seven.
Map theater data loading is controlled by the map loading format. The map loading format is
accessed by selecting the MAP LOAD option (PB 11) on the AMU maintenance format as shown in
figure 2-49. The map loading format contains three relay mode options; LOAD, ABORT, and RTN.
2.19.4 Map Loading Format Options. The LOAD option (PB 11) is used to initiate a theater load
when a map loading card is installed in the AMU maintenance card receptacle and the AMU door is
closed. Once the process is initiated, the LOAD option is removed from the format. Multiple card
theater loads/updates require the insertion of another map card when prompted by the DDI display.
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