System BIOS and Resources
System Resources
Chapter 4
64
Three major interrupt modes are available:
• PIC mode: This mode uses only legacy interrupt controllers, so the
system can support only one processor. You can select this mode when
you install Windows NT.
• Virtual wire mode: This mode, which is implemented using the
82C59 interrupt and the I/O APIC controller, is used during boot
time. The virtual wire mode allows the transition to the symmetric
I/O mode. In the virtual wire mode, only one processor executes
operations.
• Symmetric I/O mode: This mode is implemented using the I/O
APIC controller and allows for multiple processor operations.
NOTE
In PIC mode and virtual wire mode, PCI interrupts are routed to the INT
line. In symmetric I/O mode, PCI interrupts are routed to the I/O APIC
controllers and forwarded over an APIC bus to the processors.
INTIN15
IRQ15
ICH - Integrated IDE Controller
(secondary)
INTIN16
PCINTA
INTIN17
PCINTB
INTIN18
PCINTC
INTIN19
PCINTD
INTIN20
TFPC IRQ
INTIN21
SCI IRQ
INTIN22
not
connected
INTIN23
ICH SMI
(not used)
I/O APIC Input
IRQ
IRQ Description
This manual downloaded from http://www.manualowl.com
Summary of Contents for Workstation x4000
Page 11: ...Chapter 1 11 1 System Overview This manual downloaded from http www manualowl com ...
Page 25: ...Chapter 2 25 2 System Board This manual downloaded from http www manualowl com ...
Page 43: ...Chapter 4 43 4 System BIOS and Resources This manual downloaded from http www manualowl com ...
Page 81: ...Chapter 6 81 6 Power Specifications This manual downloaded from http www manualowl com ...
Page 93: ...Chapter 7 93 7 Connector Pin Outs This manual downloaded from http www manualowl com ...
Page 121: ...Chapter 8 121 8 Mechanical Specifications This manual downloaded from http www manualowl com ...
Page 125: ...Chapter 9 125 9 Hardware Components This manual downloaded from http www manualowl com ...
Page 203: ...Chapter 11 203 11 Troubleshooting This manual downloaded from http www manualowl com ...
Page 231: ...Chapter 12 231 12 Contacting Support This manual downloaded from http www manualowl com ...