AT&T PC 6300 - Test Descriptions; Motherboard Test

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DIAGNOSTICS J
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Test Descriptions
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The following paragraphs briefly describe the tests performed —
during Customer Test Diagnostics. ^
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Motherboard Test
The Motherboard test checks the following;
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• CPU ■ i
• Large Scale Integration (LSI) Chips
• ROM .
• Speaker Test. . - [y
In the CPU test, all of the addressing modes and instruction ^
classes performed in the Power-Up Diagnostics are tested again in . j
a more complete manner. A test of the CPU registers is also O
performed. This test checks each register for storage ability and
pattern sensitivity. This is accomplished by testing with many
different fixed patterns, using shifts and rotates, loads and
exchanges.
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