Interrupt Routing To Pib; Table 3-11. Pib Interrupt Assignments - Emerson I/O MODULE IPMC7126E Installation And Use Manual

Interrupt Routing to PIB

Module interrupts and MVME5100 Ethernet Port 2 interrupts go through the 8259 pair and into
the PIB. The output of the PIB then goes to the Hawk MPIC on the MVME5100. The table below
lists the ISA interrupts routed to the PIB.

Table 3-11. PIB Interrupt Assignments

ISA
PRI IRQ
1 IRQ0
3-10 IRQ2
4 IRQ9
5 IRQ10
9 IRQ14
11 IRQ3
12 IRQ4
15 IRQ7
Notes
1. Internally generated by the PIB.
2. After a reset, all ISA IRQ interrupt lines default to
edge-sensitive mode.
3. Interrupts from the Z8536 and Z85230 devices are externally wired. External logic will
determine which device to acknowledge during a pseudo IACK cycle. The Z8536 CIO has
higher priority than the Z85230 ESCC. This IRQ MUST be programmed for level-sensitive
mode.
4. This interrupt is routed from the MVME5100 through the IPMC connector to the module's
PIB to allow backward compatibility to other products.
Edge/Leve
l
INT1 Edge High
Edge High
INT2 Level High
INT2 Level Low
INT2 Level Low
INT1 Edge High
Edge High
Edge High
IPMC7126E/7616E I/O Module Installation and Use (6806800A45B)
Chapter 3 Programming
Interrupt Source
Timer 1 / Counter 0
Cascade Interrupt from INT2
Z8536 CIO
Z85230 ESCC
PCI-Ethernet Interrupt (from
MVME5100 Port 2)
PCI-SCSI Interrupt
COM2 (Async Serial Port 2)
COM1 (Async Serial Port 1)
Parallel Port Interrupt
1
2,3
2,4
2
23