Sony DX4, 486DX, AR-B1474 manual Advanced Chipset Setup

AR-B1474 User¡¦s Guide

OnBoard FDC

This option enables the floppy drive controller on the AR-B1474.

OnBoard IDE

This option Enabled/Disabled the use of the IDE controller on the AR-B1474.

Parallel Port Address

This option is used to select the port address and the IRQ of the on-board parallel port. The addresses are 378H, 278H, 3BCH, and Disable. The IRQs are IRQ5 & IRQ7 for selecting.

Parallel Port Mode

This option is specifies the parallel port mode. The settings are Printer or Extended (Bi-direction). The system support four mode: SPP, EPP & SPP, ECP, ECP & EPP for selecting.

Serial Port 1

This option is used to select the port address and the IRQs of the on-board serial port A. The options are 3F8H, 2F8H, 3E8H, 2E8H, and Disable. The system support IRQ3, IRQ4, IRQ5, and IRQ9 for selecting.

Serial Port 2

This option is used to select the port address and the IRQs of the on-board serial port B. The options are 3F8H, 2F8H, 3E8H, 2E8H, and Disable. The system support IRQ3, IRQ4, IRQ5, and IRQ9 for selecting.

6.4 ADVANCED CHIPSET SETUP

This option controls the configuration of the board’ s chipset. Control keys for this screen are the same as for the previous screen.

Automatic Configuration

If selecting a certain setting for one BIOS Setup option determines the settings for one or more other BIOS Setup options, BIOS automatically assigns the dependent settings and does not permit the end user to modify these settings unless the setting for the parent option is changed. Invalid options are grayed and cannot be selected. There is two department: DRAM Setting and ISA Bus Clock & Timing Setting

AR Bus Clock Select

DRAM Read Wait State

DRAM Write Wait State

CACHE Read Wait State

CACHE Write Wait State

Cycle Check Point

These options set the DRAM and Cache RAM access speed. If AUTO Config Function option is enabled, the other options will return to the default settings.

I/O Recovery Feature

I/O Recovery Period

If I/O Recovery Feature option is enabled, the BIOS inserts a delay time between two I/O commands. The delay time is defined in I/O Recovery Period option.

Memory Remapping

If this option is enabled, the un-shadowed RAM area will be remapped to 1MB area above.

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