Extended Self-Test,
Continued
Table 2–2
(Continued) Test Dispatcher Procedure
Stage
What the Dispatcher Does
6
Reads the flags field in the DCT to determine if the diagnostic uses a shared
diagnostic driver.
If...
Then...
The self-test diagnostic
uses a shared
diagnostic driver
The dispatcher gets the directory entry and the
pointer to the driver descriptor from the DCT.
The shared driver
needed is not already
in RAM
The dispatcher allocates temporary RAM for
the shared driver (loading the driver from ROM
to RAM) and fills in the driver descriptor data
structure to point to the RAM based shared driver.
7
Calls the devices self-test interface.
2–7