Specifications

4–12 Functional Description
Subject to Change – 17 January 1997
Interrupts
Figure 4–5 Interrupt Logic
PCI Bus
21164
pc164.2
irq_reset_l
ISA
PCI-to-ISA
Bridge
Combination
Controller
irq<15:3 ,1>
<15:9,7:3,1>
drq<7:5, 3:0>
pc164.22
pc164.25
PCI
Slots
PC164-06
System
Interrupt
PLD
pc164.17
sio_int
pc164.20-.21
pc164.23
MUX
pc164.3
Slots
sys_mch_chk_irq
Control,
and Address
pc164.7
pci_int _l
xn
Ubus<7:0>
cia_error sio_nmi
error_nmi
ide_int_l
pci_isa_irq
pc164.3
I/O Interface,
*From Halt Switch
<3:0>
IDE
Controller
pc164.18
jmp_irq3** jmp_irq2** jmp_irq1** jmp_irq0** jmp_pwr_fail jmp_mch_hlt* rtc_irq_h pci_isa_irq cia_int Pull-Down jmp_pwr_fail jmp_mch_hlt* error_nmi
cpu_irq3 pwr_fail_irq mch_hlt_irq cpu_irq0 cpu_irq1 cpu_irq2
**From Configuration Jumpers J30