NCR 7454 - BIOS Upgrades

1-20 Chapter 1: Product Overview
FLASH memory Implementation
TheIntelE28F800B5‐T70Flashcomponentisorganizedonboardas
1024Kx8(1MB).WhileatypicalPCBIOSimageincludingvideoand
LANbootROMcodenormallyfitsin256KonthePentiumBoardand
512KinthePentiumIII/Celeronboard,theboardssupporta
1MB
flashROM.ThecurrentPhoenixBIOSreleaseonlyrequires256Kof
this1MBtotal.TheFlashdevicecontainsthePCSystemBIOSalong
withtheVideoBIOSandLANbootROMwhichcompressestheROM
imagesintoasinglebinaryimage.
TheFlashdeviceisdivided
intofourareas,asdescribedbel ow.
System Address FLASH Memory Area
F0000H FFFFFH 64KMainBIOS
EE000H EFFFFH 8KSystemBIOSReservedduringboot
ED000H EDFFFH 4KPlugandPlayESCDStorageArea
E0000H ECFFFH 52KSystem/VGABIOSReservedduringboot
BIOS Upgrades
FlashmemorymakesdistributingBIOSupgradeseasy.Anewversion
oftheBIOScanbeinstalledfromtheharddisk,networkorthrougha
serialport.
Thedisk‐basedFlashupgradeutility,PHLASH.EXE,ensuresthe
upgradeBIOSextensionmatchesthetargetsystemtoprevent
accidentallyinstallingaBIOSforadifferent
typeofsystem.
Setup Utility
TheROM‐basedSetuputilitypermitsthesystemconfigurationtobe
modifiedwithoutopeningthesystemformostbasicchanges.The
SetuputilityisaccessibleonlyduringthePower‐OnSelfTest(POST)
bypressingthe<F2>keyafterthePOSTmemorytesthasbegunand
before
bootbegins.Apromptmaybeenabledthatinformsusersto
pressthe<F2>keytoaccessSetup.