AT&T 3B2 Off-Line Diagnostic Manual page 125

- - - - - - - - - - - - - - - - - - - - - Version 3 Hardware System Board Diagnostics
Test Number: 61
Function: This test determines the amount of memory specified by the Memory Size bits
on each board.
Procedure: Write every Ox100000 locations beyond the present size of memory up to the
end of the memory spectrum. Any access to these locations should cause a
access fault. If the write succeeded then the Memory Size bits indicate an
invalid size.
Hardware Tested: The Dynamic Memory is tested.
Data Returned: Memory board availability and size received upon error.
Notes: In systems with two MMUs, each test accesses both MMUs. When a test fails,
the failing address identifies the failing MMU. MMUO has addresses from
Ox4fOOO-Ox4ffff, and MMU1 has addresses from Ox4bOOO-Ox4bfff.
SYSTEM BOARD DIAGNOSTICS 3-85