Phase #(4)7 - Memory Management Unit #1; Phase #(4)7 Tests - AT&T 3B2 Off-Line Diagnostic Manual

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Version 2 Hardware System Board Diagnostics - - - - - - - - - - - - - - - - - - - - -
Phase #(4)7' -
Memory Management Unit #1
Phase Name:
Type:
Function:
Tests:
Time:
Warnings:
Notes:
Phase #(4)7 Tests
Memory Management Unit Peripheral Mode (mmu l_tst)
Normal
This phase checks the internal registers and descriptor caches of the Memory
Management Unit (MMU).
Test 1 -
checks the Virtual Address register.
Tests 2 and 3 -
check the SDCs.
Tests 4 and 5 -
check the LHPDC.
Tests 6 and 7 -
check the RHPDC.
Test 8 -
checks the SRAMA.
Test 9 -
checks the SRAMB.
Tests 10 and 11 -
check the Fault Address register and the Configuration
register.
1 second
None
None
Test Number:
1
Function:
This test checks the Virtual Address register.
Procedure:
Read and write the Virtual Address register using full binary bit patterns.
Hardware Tested:
The Virtual Address register is tested.
Data Returned:
The failing test number, the failing test pattern, and the actual test pattern read
are returned.
Notes:
None
3-22 OFF-LINE DIAGNOSTIC MANUAL

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