Digital Equipment DEC 3000 Series Service Information page 155

SCC Diagnostic,
Subtests
(continued)
Examples
Continued
Table 4–17 SCC Diagnostic Subtests
Subtests Description
INIT Performs a reset on both SCC controllers.
POLLED Tests SCC controllers using polled I/O.
INTERRUPT Tests SCC controllers, using interrupt-driven I/O.
DMA Tests SCC controllers, using DMA transfers.
LK401 Tests for the presence of a keyboard.
MOUSE Tests for the presence of a mouse.
1
MODEM Tests modem control signals.
1
Requires a modem loopback. Run the test in service mode.
This example runs the SCC diagnostic:
>>> T SCC Return
This example runs the SCC diagnostic and the LK401 subtest:
Return
>>> T SCC LK401
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