Themis USPIIi-1v, Hardware Manual

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USPIIi-1v Hardware Manual
5-14
Themis Computer
Figure 5-4. Memory Mapping in the Special PCI Target Image
5.5 Universe IIB’s Interrupt and Interrupt Handler
5.5.1 VME and PCI Interrupters:
For the VMEbus, the interrupt source can be mapped to any of the VMEbus interrupt output pins such as
VIRQ#[7..0]. If a hardware and software source are assigned to the same VMEbus VIRQn# pin, the software
source always has higher priority. Interrupt sources mapped to the PCI bus interrupts are generated via the
PCI Interrupt pin, INT#0.
For the VMEbus interrupt outputs, the Universe IIB interrupter provides an 8-bit STATUS/ID to a VMEbus
interrupt handler. Optionally, the Universe IIB generates an internal interrupt to signal that the interrupt vector
has been provided.
A16
A16
A16
A16
A24
A24
A24
A24
16 MB
BASE+0x000.0000
BASE+0x400.0000
BASE+0x3FF.FFFF
BASE+0x300.0000
BASE+0x2FF.0000
BASE+0x200.0000
BASE+0x1FF.0000
BASE+0x100.0000
BASE+0x0FF.0000
64 MB
3
2
1
0