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Sony 486DX, AR-B1474, DX4 6-4, Internal Cache Memory, Shadow , Video ROM Shadow C000, 32K, IDE Block Mode Transfer, IDE LBA Mode

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AR-B1474 User¡¦s Guide

6-4Internal Cache Memory

This option specifies the caching algorithm used for L1 internal cache memory. The settings are:

Setting Description

Disabled Neither L1 internal cache memory on the CPU or L2

secondary cache memory is enabled.

WriteBack Use the write-back caching algorithm.

WriteThru Use the write-through caching algorithm.

Table 6-1 Internal Cache Setting

External Cache Memory

This option specifies the caching algorithm used for L2 secondary (external) cache memory. The settings are:

Setting Description

Disabled Neither L1 internal cache memory on the CPU or L2

secondary cache memory is enabled.

WriteBack Use the write-back caching algorithm.

WriteThru Use the write-through caching algorithm.

Table 6-2 External Cache Setting

BootSector Virus Protection

When enabled, BIOS warns the user when any program attempts to write to or format the boot sector and allows

the user to intervene.

Shadow

These options control the location of the contents of the 32KB of ROM beginning at the specified memory location.

If no adapter ROM is using the named ROM area, this area is made available to the local bus. The settings are:

SETTING DESCRIPTION

Disabled The video ROM is not copied to RAM. The contents of

the video ROM cannot be read from or written to cache

memory.

Enabled The contents of C000h - C7FFFh are written to the same

address in system memory (RAM) for faster execution.

Cached The contents of the named ROM area are written to the

same address in system memory (RAM) for faster

execution, if an adapter ROM will be using the named

ROM area. Also, the contents of the RAM area can be

read from and written to cache memory.

Table 6-3 Shadow Setting

Video ROM Shadow C000, 32K

When this option is set to Enabled, the video ROM area from C000h-C7FFh is copied (shadowed) to RAM for

faster execution.

IDE Block Mode Transfer

If your hard disk supports multi-sector transfer, you can enable this option to speed the IDE transfer rate. When

Enabled, the Read/Write and From/To operations between BIOS and hard disk will be done block by block.

IDE LBA Mode

The maximum capacity of a standard IDE disk drive without LBA mode was 528MB. The LBA mode enables IDE

drive to have more than 528MB in one disk drive.

Contents

Main Page 0-1 Table of Contents AR-B1474 Users Guide 0-2 0-3 0. PREFACE 0.1 COPYRIGHT NOTICE AND DISCLAIMER 0.2 WELCOME TO THE AR-B1474 SERIAL CPU BOARD 0.3 BEFORE YOU USE THIS GUIDE 0.4 RETURNING YOUR BOARD FOR SERVICE 0.6 ORGANIZATION 0.7 STATIC ELECTRICITY PRECAUTIONS AR-B1474 Users Guide 1-1 1. OVERVIEW l Introduction l Packing List l Features 1.1 INTRODUCTION 1.2 PACKING LIST 1.3 FEATURES 2-1 2. SYSTEM CONTROLLER 2.1 DMA CONTROLLER 2.2 KEYBOARD CONTROLLER 2-2 2.3 INTERRUPT CONTROLLER 2-3 2.3.1 I/O Port Address Map 2-4 2.3.2 Real-Time Clock and Non-Volatile RAM 2.3.3 Timer 2-5 2.3.4 ISA Bus Pin Assignment Table 2-5 ISA Bus Pin Assignment Table 2-4 ISA Bus Pin Assignment AR-B1474 Users Guide 2-6 2.3.5 ISA Bus Signal Description Name Description 2-7 2.4 SERIAL PORT (1) Receiver Buffer Register (RBR) (2) Transmitter Holding Register (THR) 2-8 (3) Interrupt Enable Register (IER) (4) Interrupt Identification Register (IIR) (5) Line Control Register (LCR) (6) MODEM Control Register (MCR) 2.5 PARALLEL PORT (1) Register Address (2) Printer Interface Logic 2-10 (3) Data Swapper (4) Printer Status Buffer (5) Printer Control Latch & Printer Control Swapper 3-1 3. SETTING UP THE SYSTEM Figure 3-1 AR-B1474 Placement 3.1 OVERVIEW 3.2 SYSTEM SETTING 3.2.1 Serial Port 3.2.2 Hard Disk (IDE) Connector (CN1) 3.2.3 Power Connector (J5) J5 3.2.4 FDD Port Connector (CN2) 3.2.5 Parallel Port Connector (CN3) 3-5 3.2.6 PC/104 Connector Figure 3-10 CN4: 40-Pin PC/104 Connector Bus C & D (1) 64-Pin PC/104 Connector Bus A & B (CN6) CN6 1 2 Figure 3-9 CN6: 64-Pin PC/104 Connector Bus A & B 3-6 (3) PC/104 ISA Bus Signal Description Name Description 3.2.7 CPU Setting JP1 JP2 AMD CPU Others CPU JP9 BA C 3.2.8 Memory Setting JP8 JP8 JP8 3.2.9 LED Header (J1, J2 & J4) 3.2.10 Keyboard Connector 3.2.11 External Speaker Header (J3) J3 Non chargeableRechargeable 3.2.12 Reset Header (J7) 3.2.13 Battery Setting Page 4-1 4. INSTALLATION 4.1 OVERVIEW 4-2 4.2 UTILITY DISKETTE (1) PGM1474.EXE 4-3 (2) WD1474.EXE (3) WP1474.EXE (4) BU1474.EXE (5) RFG.EXE 4-4 (6) RFGDEMO.PGF 4.3 WRITE PROTECT FUNCTION 4.3.1 Hardware Write Protect 4.3.2 Software Write Protect 4.3.3 Enable the Software Write Protect 4.3.4 Disable the Software Write Protect 4.4 WATCHDOG TIMER 4.4.1 Watchdog Timer Setting 4-7 4.4.2 Watchdog Timer Enabled 4.4.3 Watchdog Timer Trigger 4.4.4 Watchdog Timer Disabled Page 5-1 5. SOLID STATE DISK 5.1 OVERVIEW 5.2 SWITCH SETTING 5-2 5.2.1 Overview 123456 5.2.2 I/O Port Address Select (SW1-1 & SW1-2) 5.2.3 SSD Firmware Address Select (SW1-3 & SW1-4) 5-3 5.2.4 SSD Drive Number (SW1-5 & SW1-6) (1) Simulate 2 Disk Drive 5-4 (2) Disk Drive Name Arrangement 5.2.5 ROM Type Select (SW1-7 & SW1-8) 5-5 5.3 JUMPER SETTING 5.3.1 SSD BIOS Select (JP7) Enable Disable JP7 (Factory preset) 5.3.2 SSD Memory Type Setting (M1 ~ M3 & JP5) 5.4 ROM DISK INSTALLATION 5.4.1 UV EPROM (27Cxxx) 5-7 123456 5-8 5.4.2 Large Page 5V FLASH Disk 123456 (2) Switch and Jumper Setting 5.4.3 Small Page 5V FLASH ROM Disk 5-10 (2) Using Tool Program (3) Typing DOS Command 5-11 5.4.4 RAM Disk (1) Jumper Setting 5-12 5.4.5 Combination of ROM and RAM Disk M1 5.5 INSTALLATION D.O.C. 5.5.1 Hardware Setting (1) SSD BIOS Setting (JP7) Disable 5.5.2 Software Setting Page 6-1 6. BIOS CONSOLE 6.1 BIOS SETUP OVERVIEW 6.2 STANDARD CMOS SETUP 6.3 ADVANCED CMOS SETUP 6-4 Internal Cache Memory Shadow Video ROM Shadow C000, 32K IDE Block Mode Transfer 6.4 ADVANCED CHIPSET SETUP 6.5 POWER MANAGEMENT 6.6 AUTO-DETECT HARD DISKS 6.7 PASSWORD SETTING 6.7.1 Setting Password 6.7.2 Password Checking 6.8 LOAD DEFAULT SETTING 6.9 BIOS EXIT 6.9.1 Save Settings and Exit 6.9.2 Exit Without Saving 7-1 7. SPECIFICATIONS Page 8-1 8. PLACEMENT & DIMENSIONS 8.1 PLACEMENT 8-2 8.2 DIMENSIONS Unit: mil (1 inch = 25.4 mm = 1000 mil) 9-1 9. MEMORY BANKS & PROGRAMMING RS-485 9.1 USING MEMORY BANK 9-2 9.2 PROGRAMMING RS-485 (1) Initialize COM port (2) Send out one character (Transmit) 9-3 (3) Send out one block data (Transmit the data more than two characters) (4) Receive data (5) Basic Language Example Page 10-1 10. SSD TYPES SUPPORTED & INDEX 10.1 SSD TYPES SUPPORTED 10-2 10-3 10.2 INDEX