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Appendix
Device Configuration: I/O and
Interrupt Control
Contents
BIOS Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Device Address Definition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Device Interrupt Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Introduction
This appendix provides the user with the information needed to develop custom
applications for the VMICPCI-7611. The CPU board on the VMICPCI-7611 is unique
in that the BIOS can not be removed; it must be used in the initial boot cycle. A custom
application, like a revised operating system for example, can only begin to operate
after the BIOS has finished initializing the CPU. The VMICPCI-7611 will allow the
user to either maintain the current BIOS configuration or alter this configuration to be
more user specific, but this alteration can only be accomplished after the initial BIOS
boot cycle has completed.
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