4—Universe II Description
Universe II’s Interrupt and Interrupt Handler
4-17
Themis Computer
Figure 4-4.
Memory Mapping in the Special PCI Target Image
4.4
Universe II’s Interrupt and Interrupt Handler
4.4.1
VME and PCI Interrupters
For the VMEbus, the interrupt source can be mapped to any of the VMEbus interrupt out-
put pins such as VIRQ*[7..0]. If a hardware and software source are assigned to the same
VMEbus VIRQ*n 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.
A16
A16
A16
A16
A24
A24
A24
A24
16 MB
BASE+0x000.0000
BASE+0x400.0000
BASE+0x3FF.0000
BASE+0x300.0000
BASE+0x2FF.0000
BASE+0x200.0000
BASE+0x1FF.0000
BASE+0x100.0000
BASE+0x0FF.0000
64 KB
3
2
1
0
64 MB
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