AT&T 3B2 Off-Line Diagnostic Manual page 624

Phase Descriptions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Phase #8 - CPU Timer Test
Phase Name:
Type:
Function:
Tests:
Time:
Warnings:
Notes:
Phase #8 Tests
Network Access Unit CPU_3 (cpu_3)
Demand
This phase tests the operation of the internal Timer registers of the
INTEL 80186 CPU.
Tests 1 through 17 - check the TimerO Count register.
Tests 18 through 34 - check the TimerO MCA register.
Tests 35 through 51 - check the TimerO MCB register.
Tests 52 through 59 - check the TimerO Mode register.
Tests 60 through 77 - check the Timerl Count register.
Tests 78 through 94 - check the Timerl MCA register.
Tests 95 through 111 - check the Timerl MCB register.
Tests 112 through 120 - check the Timer1 Mode register.
Tests 121 through 137 - check the Timer2 Count register.
Tests 138 through 154 - check the Timer2 MCA register.
Tests 155 through 158 - check the Timer2 Mode register.
1 second
None
If any test in this phase fails, the following hardware may be faulty:
• INTEL 80186 Microprocessor
• INTEL 80186 Microprocessor interface to the Network Access Unit
Address /Data bus.
Test Numbers: 1 through 17
Function: These tests verify that the TimerO Count register is functional.
Procedure: Write a valid data pattern to the register and verify with a read.
Hardware Tested: The TimerO Count register is tested.
Data Returned The failed test number, the actual value, and the expected value are returned.
15-12 OFF-LINE DIAGNOSTIC MANUAL