Phase #9 - Scsi Cpu Lower Chip Select - AT&T 3B2 Off-Line Diagnostic Manual

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Phase #9 - SCSI CPU Lower Chip Select
Phase Name:
Type:
Function:
Tests:
Time:
Warnings:
Notes:
Phase #9 Tests
SCSI CPU Lower Chip Select
Demand
This phase verifies that the Lower Memory Chip Select (LMCS) register of the
INTEL 80186 CPU is functioning properly.
Tests 1 through 12 - check the LMCS register.
2 seconds
None
If any test in this phase fails, the following hardware may be faulty:
• INTEL 80186 Microprocessor
• INTEL 80186 Microprocessor interface to the SCSI bus.
Test Numbers: 1 through 12
Function: These tests verify that the LMCS register is functional.
Procedure: A valid data pattern is written to the register, and it is verified with a read.
Hardware Tested: The LMCS register is tested.
Data Returned: The test number that failed, the actual data, and the expected data are returned.
SMALL COMPUTER SYSTEM INTERFACE DIAGNOSTICS 14-17