AT&T 3B2 Off-Line Diagnostic Manual page 89

- - - - - - - - - - - - - - - - - - - - - Version 2 Hardware System Board Diagnostics
Test Number: 4
Function: This test checks that a Level 9 interrupt is generated when the Central Control
(CC) CSR set PIR 9 bit command is issued.
Procedure: The CSR PIR 9 bit is cleared. The interrupt mask is lowered. The CSR PIR
9 bit is set. It is confirmed that both a Level 9 interrupt is taken and that the
CSR accurately reflects the PIR 9 request.
Hardware Tested: The Interrupt System and CSR are tested.
Data Returned: The contents of the CSR read from the interrupt handler are returned.
Notes: The CSR condition is tested in the interrupt handler.
Test Number: 5
Function: This test checks that a Level 8 interrupt is generated when the CC CSR set PIR
8-bit command is issued.
Procedure: The CSR PIR 8 bit is cleared. The interrupt mask is lowered. The CSR PIR
8 bit is set. It is confirmed that both a Level 8 interrupt is taken and that the
CSR accurately reflects the PIR 8 request.
Hardware Tested: The Interrupt System and CSR are tested.
Data Returned: The contents of the CSR read from the interrupt handler are returned.
Notes: The CSR condition is tested in the interrupt handler.
SYSTEM BOARD DIAGNOSTICS 3-49