Key Module Operation; Shift-Lock Mechanism; Basic Assurance Test (Bat) - IBM 6360 Product Support Manual

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Compression Spring
Flat
Spring
Fly Plate
spring---Ij(==,.,.=~
Clearance
At Rest
Normal
Clearance
Fully Pressed
Pad Card Capacitor Plate
Stem
Assembly
Pad Card
Key Module Operation
Shift-Lock Restoring Mechanism
Key Module Operation,
KEYBOARD - Shift Lock Mechanism, BAT
-25-
BASIC ASSURANCE TEST (BAT)
A Power on Reset (POR) of the system will automatically
start the keyboard Basic Assurance Test (BAT} and perform
wrap tests on the keyboard adapter circuits of the system
card.
The keyboard BAT will verify the keyboard microproces-
sor, located on the keyboard logic card is operating cor-
rectly. The keyboard notifies the system processor of the
keyboard status by transmitting a specified sequence of
two bytes of data. Successful completion of the BAT is
necessary for the keyboard to proceed with normal sys-
tem operation.
A third byte containing the keyboard ID is also transmitted
to provide configuration information.
System Power-On-Reset
BAT Signal to Keyboard Microprocessor
BAT Self-test of Keyboard Microprocessor
BAT Completion Codes Transmitted
System Electronics Accepts Data Byte Codes
Keyboard ID Transmitted
Keyboard Operational