Phase #19 Tests - AT&T 3B2 Off-Line Diagnostic Manual

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Phase #19 Tests
The other configuration described tests the ability of the coprocessor to
externally loop serial data to itself through the Network Access Unit STARLAN
Network media interface jacks. When both Network Access Unit jacks are
empty, they should loopback and properly terminate the Network Access Unit
STARLAN Network interface circuitry. This configuration tests the Network
Access Unit up to the media interface jacks.
It
also tests the Network Access
Unit STARLAN Network loop around and, to some degree, termination
capabilities, as provided through the "input" and "output" jacks.
If any test in this phase fails, the following hardware may be faulty:
• INTEL 82586 LAN Coprocessor
• STARLAN Network cable
• Network Access Unit "input" and/or "output" jack(s)
• Network Access Unit STARLAN Network Serial Interface circuitry
• INTEL 80186 Microprocessor and the INTEL 82586 LAN Coprocessor
Control/Status bus
• INTEL 82586 LAN Coprocessor interface to the Network Access Unit
Address/Data bus
• Network Access Unit RAM/ROM.
Test Number: 1
Function: This test verifies that the INTEL 82586 LAN Coprocessor passes its
preinitialization process.
Procedure: The System Configuration Pointer (SCP) and Intermediate System Control
Pointer (ISCP) are in Network Access Unit ROM. The INTEL 80186
Microprocessor sets up the System Control Block (SCB) in Network Access Unit
RAM.
Hardware Tested: The INTEL 82586 LAN Coprocessor is tested.
Data Returned: The failed test number, the actual value, and the expected value are returned.
Test Number:
Function:
Procedure:
2
This test verifies that the INTEL 82586 LAN Coprocessor passes its
initialization process.
Initialize the INTEL 82586 LAN Coprocessor receive frame area in Network
Access Unit RAM. Check the SCB status line to make sure that the
initialization procedure was not aborted (Test 2). Service the Channel
Attention (CA).
Hardware Tested: The INTEL 82586 LAN Coprocessor is tested.
Data Returned: The failed test number, the actual value, and the expected value are returned.
STARLAN INTERFACE DIAGNOSTICS 15-45