Specifications

AR-B1564 User¡¦s Guide

7-6

7.4 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.

AMIBIOS SETUP - ADVANCED CHIPSET SETUP

DRAM Automatic Configuration Enabled

EDO Dram Access Time 60ns

FP Dram Access Time 60ns

Refresh Cycle Time 12

RAS Pulse Width When Refresh 6T

DRAM Read Leadoff Time 1T

ISA Bus Clock Frequency 7.159MHZ

MEMORY HOLE at 15M - 16M Disabled

USB Function Enabled

USB Keyboard / Mouse Legacy Support Enabled

Available Options :

Disabled

Enabled

ESC:Exit ¡ô¡õ:Sel

PgUp/PgDn:Modify

F2/F3:Color

Figure 7-4 BIOS: Advanced Chipset Setup

DRAM Automatic Configuration

If selecting a certain setting for one BIOS Setup option determines the settings for one or more other BIOS Setup

options, the 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.

Memory Hole at 15-16 MB

This option specifies the range 15MB to 16MB in memory that cannot be addressed on the ISA bus.

ISA Bus Clock Frequency

This option is used to select the ISA bus clock rate.

USB Function

USB Keyboard/Mouse Legacy Support

These options are used to <Disabled> the USB function. If the options set <Enabled> in the same time will open

the <Shadow RAM DC00~DFFF>, and will occupied IRQ10.

ISA Bus Clock Frequency

This option sets the polling clock speed of ISA Bus (PC/104).

NOTE: 1. PCLK means the CPU inputs clock.

2. Acrosser recommends user setting at the range of 8MHz to 10MHz.

Refresh Cycle Time

This option sets the DRAM refresh cycle time.