Phase #(6)9 Tests - AT&T 3B2 Off-Line Diagnostic Manual

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Phase #(6)9 Tests
Test Numbers:
Function:
Procedure:
1 and 2
These tests check the translation of paged and contiguous segments.
The test procedure is as follows:
1. The Page Descriptor Table (PDT) and Segment Descriptor Table (SDT)
are set up.
2. Section Random Access Memory A (SRAMA) and SRAMB are set up.
3. A data pattern is written to RAM (Ox02060000 - Ox020403ff) in virtual
mode.
4. The data are read back in physical mode to confirm that the translation
occurred correctly.
Hardware Tested: The MMU chip is tested.
Data Returned: The failing test number, the expected data, and the actual data read are
returned.
Notes: None
Test Numbers: 3 through 6
Function: These tests check the R&M updating of the MMU.
Procedure: Tables are set up, a segment is referenced, a segment is written, and a signature
is read in this procedure.
Hardware Tested: The MMU chip is tested.
Data Returned: The failing test number (last number displayed on the system console before
failure) is returned.
Notes: None
3-28 OFF-LINE DIAGNOSTIC MANUAL