Failure Indications; Unexpected Use Of (Address) Failure Messages - HP 400 Series Servicing Manual

3 Hex LSDs
EEC - F16
4.9.3

Failure Indications

As the self-test progresses, the LEDs display the current state. At the end of the test,
a power-up with no errors is indicated by all LEDs turned off and by immediate entry
into the boot scanner.
If a failure occurred during the self-tests, then that failure is indicated on the LEDs at
the end of the tests. If there was more than one failure, the highest priority failure is
indicated on the LEDs.
4-40 Fault Isolation
Table 4-6.

Unexpected Use of (address) Failure Messages

Unexpected Event
FFA Bus error
FF4 Address error
FFE Illegal instruction
FE8 Zero by zero trap
FE2 Check trap
FDC TRAPV trap
FD6 Privilege violation
FCA 1010 Op. Code
FC4 1111 Op. Code
FBE Interrupt Level 1 (keyboard)
FB8 Interrupt Level 2 (not used)
FB2 Interrupt Level 3
FAC Interrupt Level 4
FA6 Interrupt Level 5
FA0 Interrupt Level 6
F9A Interrupt Level 7 (Reset from keyboard)
F3A-F94 CPU traps
F34 Reset from keyboard
F2E Keyboard timeout (fast handshake)
F28 Battery backup interrupt
F22 Non-maskable interrupt from the backplane
F1C Spurious interrupt
Vectored interrupt
EE6 Format error, co-processor violation, or unknown
EE0 Co-processor exception vectors