Specifications

9 March 1999 – Subject To Change Functional Description 4–11
Interrupts
Figure 4–5 Interrupt Logic
PCI Bus
21164
pc164lx.2
req_reset_l
ISA
PCI-to-ISA
Bridge
Combination
Controller
irq<15:3,1>
<15:9,7:3,1>
drq<7:5, 3:0>
pc164lx.22
pc164lx.25
PCI
Slots
System
Interrupt
PLD
pc164lx.17
sio_int
pc164lx.20-21
pc164lx.23
MUX
pc164lx.3
Slots
pc164lx.7
pci_int _l
xn
Ubus<7:0>
cia_error sio_nmi
ide_int_l
pci_isa_irq
pc164lx.3
21174
<3:0>
IDE
Controller
pc164lx.18
jmp_irq3** jmp_irq2** jmp_irq1** jmp_irq0** rtc_irq_h pci_isa_irq pyx_irq0 Pull_Down
srom_dat_h mch_hlt_irq_h pwr_fail_irq_h sys_mch_chk_irq_h
**From Configuration Jumpers J27
srom_oe_l
MUX
pc164lx.3
real_srom_d Pull_Down Pull_Down Pull_Down error_nmi Pull_Down mch_hlt test_srom_d
FM-05949.AI4
x can vary from a to d; n can vary from 0 to 3.
*
*
irq<15:4>