Epson Endeavor 486I, User Manual

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ISA and PCI Expansion Buses
Your computer includes expansion buses for two types of
option cards: ISA and PCI. The PCI bus provides extremely fast
data transfer (33 MHz) for up to two high-performance PCI
cards, such as high-speed video cards. PCI cards use plug and
play technology that automatically configures resources used
by the card, such as interrupt requests and memory addresses.
The ISA bus transfers data at 8.33 MHz for up to three 16-bit
ISA option cards. You can use these slots for standard ISA
cards such as fax/ modem cards, sound cards, and SCSI (Small
Computer System Interface) cards.
System and video BIOS
The computer’s system and video BIOS are contained in a flash
memory device on the main system board, which you can
upgrade without replacing the chip.
Your computer supports shadowing of the system and video
BIOS to allow BIOS routines to run from fast, 32-bit RAM
instead of from the slower, S-bit flash device.
How to Use This Manual
This manual contains the information you need to get the best
results from your computer. You don’t have to read everything;
see the following chapter summaries to find the sections you
need.
If you are reading the manual online, click on the highlighted
words below to skip to the section you want to read.
I n t r o d u c t i o n 3