Integrated Pci Bridge - EPOX EP-58MVP3C-M Manual

2-8 EP-58MVP3C-M

2-6 Integrated PCI Bridge

This mainboard utilizes VIA Apollo MVP3 AGP/PCIset chipset to support Intel
Pentium Processor PCI/ISA system. The VIA Apollo MVP3 PCIset chipset
consists of the 82C598AT system controller (TSC), and one 82C586B PCI ISA/
IDE Accelerator bridge chip. It provides an interface which translates CPU cycle
into PCI bus cycle, and PCI burst read/write capability. In addition, it provides high
performance PCI arbitor to support four PCI Masters, Rotating Priority
Mechanism, and Hidden Arbitration Scheme Minimizes Arbitration Overhead.
There are four interrupts in each PCI slot : INTA#, INTB#, INTC#, and INTD#.
Since this mainboard adapts the PCI auto-configuration with the system BIOS
Setup utility. When the system is turned on after adding a PCI add-in card, the
BIOS automatically configure interrupts, DMA channels, I/O space, and other
paramaters. You do not have to configure jumpers or worry about potential resource
conflicts. Because PCI cards use the same interrupt resource as ISA cards, you must
specify the interrupt used by ISA add-in cards in the BIOS Setup utility.
However, if a "Legacy card" (such as plugging a paddle card and cable into an ISA
slot) is plugged in the system, modification in the ROM SETUP UTILITY
becomes necessary. First of all, you must enter PCI CONFIGURATION SETUP
utility from the ROM SETUP UTILITY main menu to set "ISA" for the "PCI
IDE IRQ MAP TO
Secondly, you must enter the CHIPSET FEATURES SETUP UTILITY from the
ROM SETUP UTILITY main menu and set "Disabled" for the "Onboard
Primary PCI IDE and the Onboard Secondary PCI IDE. When you plug PCI/
ISA IDE cards into the system, You should select "Disabled" for the Onboard
Primary and Secondary PCI IDE from the CHIPSET FEATURES SETUP
UTILITY too.
You can set the system interrupt request (IRQ) on some "Legacy cards" which have
on paddle card and cable. (refer to user's manual of the card) to a proper system
IRQ level (In general, card's Primary is assigned to INTA and Secondary is
assigned to INTB). If the card is plugged into slot 1(marked PCI#1), you cannot
use second slot (marked PCI#2) because the Secondary INT signal takes INTB from
the slot (refer to Page 3-12 for circuit diagram). The user then enters the PCI
CONFIGURATION SETUP utility from the ROM SETUP UTILITY main
menu and set "PCI-Slot 1" for the "PCI IDE IRQ MAP TO (This depends on the
slot # where the Legacy card is plugged).
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