Programming the Flash ROM | American Megatrends MAN-772 guide

3 Programming the Flash ROM

All versions of the Apollo IV motherboard use Flash EPROM to store the system BIOS. The advantage of Flash EPROM is the EPROM chip does not have to be replaced to update the BIOS. The end user can actually reprogram the BIOS, using a ROM file supplied by American Megatrends.

Programming the Flash EPROM

Step

Action

1Turn power off. Make sure the computer has a working speaker.

2Insert the floppy disk with the S772P.ROM file in drive A:.

3Before DOS boots, press and hold down the <Ctrl> and <Home> keys to reprogram the Flash EPROM-based AMIBIOS. The bootblock code immediately reads the A: drive, looking for the new BIOS information.

4When the flash ROM has successfully been programmed, the computer will reboot.

Bootblock BIOS Actions When you reprogram from system boot, the bootblock BIOS code:

Reads S772P.ROM from the root directory of the floppy disk in drive A:.

Erases the Flash EPROM.

Programs the Flash EPROM with the data read from the floppy disk in drive A:.

Generates a CPU reset, rebooting the computer.

The bootblock part of the Flash EPROM is not programmed. Should you inadvertently open the disk drive door or turn power off to the computer while programming the Flash EPROM, the bootblock will be unaffected. Simply turn power back on and begin the Flash ROM programming process again.

Cont’d

Chapter 2 WINBIOS Setup

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American Megatrends MAN-772 manual Programming the Flash ROM, Programming the Flash Eprom

Contents

Apollo IV Pentium PCI ISA MotherboardGuide Ii Apollo IV PCI Pentium ISA Motherboard User’s Guide Phone Number Characteristics PrefaceTechnical Support Static Electricity Packing List CPU Manufacturer Supported CPU Speeds Overview Chipset Type of System Supported System Memory Socket Overview Ultra DMA/33 Fast ATAFloppy Parallel Port CPU External Clock Frequency PCI Expansion Slot Frequency Mouse Infrared DMI Motherboard Height Restrictions Apollo IV Dimensions Step Action Installation Steps Apollo IV Motherboard Layout Step Action Unpack the Motherboard Set Jumpers PWR1 Setting Description Flash ROM Type Avoid Static Electricity External Configure CPU P54C P55C For P54C Summary of Jumper Setting for Intel Pentium CPUs Summary of Jumper Setting for AMD K5 and K6 CPUs Value Description AMD-K6 Step Action Supported System Memory Configurations Install MemoryType of System Memory Supported System Memory Socket Total System Memory Display Should supply these parts Install the Motherboard Install Motherboard Attach Cables Connector Attach Cables Pin Description Power Connector Pinout Pin Motherboard Pin Description Connector Signal Descriptions Pins 12 13 14 Connect Onboard I/O Pin Description Signal Description SLCTIN# Pin Signal Description Attach Floppy Drive Floppy Connector Pinout Twist in Floppy CablePin Use Attach IDE Drive Attach IDE Drive Primary Pinout The Primary IDE pinout is Secondary IDE Pinout The Secondary pinout is Test and Configure Page Winbios Setup Using a Mouse with Winbios Setup Using the Keyboard with Winbios SetupKeystroke Action Winbios Setup Menu Drive Type How to Configure Standard Setup Parameter Description 65535 1223 152 MB Hard Disk Drive Types Setting Description Advanced Setup Advanced Setup Type of Armd Device Drive Emulation Configured Advanced Setup Disabled Chipset Setup Power Management Setup Power Management Setup PCI/PnP Setup Cont’dSnoop Bit Action DMA Channel Option Optimal Default Fail-Safe Default Primary Prefetch Peripheral SetupIDE Secondary IRQ options Offboard PCI IDE Primary IRQ Peripheral Setup EPP Version Setting Description Security Amibios Password Support Changing a Password Setting a Password Anti-Virus Utility Original OptimalFail-Safe Programming the Flash Eprom Programming the Flash ROM Step Expected behavior Programming the Flash ROM Number of Beeps Description Code Description Bootblock Code Checkpoint Codes