Motorola MVME2400 - Manual (Page 84)

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Programming the MVME240x
4
The arbitration assignments for the MVME240x are shown in Table 4-2 .
Interrupt Handling
The Hawk ASIC, which controls the PHB (PCI Host Bridge) and the
MPU/local bus interface functions on the MVME240x, performs interrupt
handling as well. Sources of interrupts may be any of the following:
❏ The Hawk ASIC itself (timer interrupts, transfer error interrupts, or
memory error interrupts)
❏ The processor (processor self-interrupts)
❏ The PCI bus (interrupts from PCI devices)
❏ The ISA bus (interrupts from ISA devices)
Figure 4-2 illustrates interrupt architecture on the MVME240x. For details
on interrupt handling, refer to the MVME2400-Series VME Processor
Module Programmer’s Reference Guide.
Table 4-2. PCI Arbitration Assignments
PCI Bus Request PCI Master(s)
PIB (Internal) PIB
CPU Hawk ASIC
Request 0 PMC Slot 2
Request 1 PMC Slot 1
Request 2 PCI Expansion Slot
Request 3 Ethernet
Request 4 Universe ASIC (VMEbus)