HP Kayak XU 04xx HP Kayak XU PC Workstation Technical Reference Manual Hardwar - Page 67

PCI Interrupt Request Lines, sharing of interrupts. Therefore

Get HP Kayak XU 04xx PDF manuals and user guides View all HP Kayak XU 04xx manuals
Add to My Manuals
Save this manual to your list of manuals

Page 67 highlights

4 HP BIOS BIOS Addresses AGP AB 16-bit SCSI A PCI Interrupt Request Lines PCI devices generate interrupt requests using up to four PCI interrupt request lines (INTA#, INTB#, INTC#, and INTD#). PCI interrupts can be shared; several devices can use the same interrupt. However, optional system performance is reached when minimizing the sharing of interrupts. Therefore, the interrupts of the PCI devices are routed in the distributed manner, as shown below. 8-bit SCSI A Slot 1(LAN) ABCD Slot 2 ABCD Slot 3 (ARO) ABCD Slot 4 ABCD A B PCI/ISA Bridge C D 59

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
59
4
HP BIOS
BIOS Addresses
PCI Interrupt Request Lines
PCI devices generate interrupt requests using up to four PCI interrupt
request lines (INTA#, INTB#, INTC#, and INTD#).
PCI interrupts can be shared; several devices can use the same interrupt.
However, optional system performance is reached when minimizing the
sharing of interrupts. Therefore, the interrupts of the PCI devices are routed
in the distributed manner, as shown below.
A
B
C
D
A
B
C
D
A
B
C
D
PCI/ISA
Bridge
Slot 3 (ARO)
Slot 4
AGP
A
B
C
D
Slot 2
A
B
C
D
Slot 1(LAN)
A
B
16-bit
SCSI
8-bit
SCSI
A
A