Pci Bus Configuration Space; Isa Bus Irq Assignments - Intergraph TD-x10 System Reference Manual

Bits (3:0) of PIRQ
0110
0111

PCI Bus Configuration Space

The table below lists the configuration space used for the primary PCI bus. The PCI bus uses type 1
configuration access, which specifies two 32-bit I/O ports used as the index register (0CF8h) and the
data register (0CFCh).
Device
Host-to-PCI Bridge (PCMC)
PCI-to-ISA Bridge
Graphics Accelerator
Ethernet Controller
SCSI Controller
PCI Slot 1
PCI Slot 2
PCI Slot 3
Each PCI slot on the riser card has four available interrupt lines: INTA, INTB, INTC, and INTD.
These are connected to the PCI interrupts PIRQ0 through PIRQ3, as shown below:
Interrupt Line
INTA
INTB
INTC
INTD

ISA Bus IRQ Assignments

The ISA slots on the riser card accommodate ISA based option boards and a 16-bit wide expansion
bus. The ISA bus interrupt (IRQ) assignments are defined below.
IRQ Name
0 System Timer 0
1 Keyboard Full
2 Cascade input for IRQ8 - IRQ15
3 COM2, COM4
4 COM1, COM3
5 Spare
6 I/O Controller
7 Parallel Port
ISA Interrupt Bits (3:0) of PIRQ
IRQ6 1110
IRQ7 1111
Device Number
0
2
5
6
7
D
E
F
Slot 1 Slot 2 Slot 3
PIRQ0 PIRQ1 PIRQ2
PIRQ1 PIRQ2 PIRQ3
PIRQ2 PIRQ3 PIRQ0
PIRQ3 PIRQ0 PIRQ1
ISA Interrupt
IRQ14
IRQ15
0CF8h Value
800000XX
800010XX
800028XX
800030XX
800038XX
800068XX
800070XX
800078XX
Slot 4 Slot 5
PIRQ3 PIRQ0
PIRQ0 PIRQ1
PIRQ1 PIRQ2
PIRQ2 PIRQ3
IRQ Name
8 Real Time Clock
9 Spare
10 Vibra 16C Controller
11 Spare
12 Mouse
13 Not Available
14 Spare
15 Spare
59
Slot 6
PIRQ1
PIRQ2
PIRQ3
PIRQ0