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Appendix A: Configuring expansion
cards
Many ISA expansion cards have a number of configurable
options. These options can include items such as: the
interrupt used, the DMA channel used, where any ROM on
the card will appear in the processor's memory map and
the address of any I/O ports used to control the card.
How to select options like this varies from card to card and
will be described in documentation supplied with the card.
Remember to check any floppy disks supplied with the
card for README or Help files.
Most ISA cards use jumpers and/or switches to select their
configuration options. If this is the case then the card
should be configured before you install it. A few cards are
configured using a software utility supplied with the card,
this can only be done after the card is installed.
If you are not familiar with the concepts of interrupts, DMA
channels, memory maps and I/O ports the following text
attempts to explain what they are, and how to decide which
option to select.
For the following explanations it should be understood that
a peripheral can be either, a subsystem on the
motherboard, or an expansion card.
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