User`s manual
Diagnostic Card UsageEP-P80P+
Page 7
Chapter 2Chapter 2
Chapter 2Chapter 2
Chapter 2
Diagnostic Card UsageDiagnostic Card Usage
Diagnostic Card UsageDiagnostic Card Usage
Diagnostic Card Usage
System Voltages Detected
These LEDs represent the voltages they represent being present
on the PCI bus. The diagnostic card is capable of detecting +5,
+3.3, -12,
+12V and PCIRST from the PCI bus.
PCI Bus C/BE[3::0] # Description
Note: A binary 1 below would represent the diagnostic cards
corresponding LED being enabled (on), while 0 would be the
LED disabled (off).
BEQ#: PCI Bus
3 2 1 0 Command Type
0 0 0 0 Interrupt Acknowledge
0 0 0 1 Special Cycle
0 0 1 0 I/O Read
0 0 1 1 I/O Write
0 1 0 0 Reserved
0 1 0 1 Reserved
0 1 1 0 Memory Read
0 1 1 1 Memory Write
1 0 0 0 Reserved
1 0 0 1 Reserved
1 0 1 0 Configuration Read
1 0 1 1 Configuration Write
1 1 0 0 Memory Read Multiple
1 1 0 1 Dual Address Cycle
1 1 1 0 Memory Read Line
1 1 1 1 Memory Write and Invalidate
For more information about the PCI Bus C/BE signal please refer to PCI
Local Bus Specification Revision 2.0 or Intel datasheets.