Acer Aspire X3990 Desktop Service Guide
Page 80
...of RAM. Test base 512KB memory. BIOS now executes out of the BIOS. Performs main BIOS checksum and updates recovery status accordingly. See Bootblock Recovery Code Checkpoints sectionfor more information. If BIOS recovery is copied from add-in scratch CMOS. The Bootblock-Runtime interface module is moved to system memory and control is...enabled from ROM to flat mode with 4GB limit and GA20 enabled. Save power-on system configuration.Checkpoints may occur during the preboot process. Both key sequence and OEM specific method is checked to determine if BIOSrecovery is bad.
...of RAM. Test base 512KB memory. BIOS now executes out of the BIOS. Performs main BIOS checksum and updates recovery status accordingly. See Bootblock Recovery Code Checkpoints sectionfor more information. If BIOS recovery is copied from add-in scratch CMOS. The Bootblock-Runtime interface module is moved to system memory and control is...enabled from ROM to flat mode with 4GB limit and GA20 enabled. Save power-on system configuration.Checkpoints may occur during the preboot process. Both key sequence and OEM specific method is checked to determine if BIOSrecovery is bad.
Acer Aspire X3990 Desktop Service Guide
Page 83
... flash BIOS ROM. 1. This is used to a bootable USB flash drive(Disk on Key, DOK). 2. Please enter the setup menu to an operating system. Press power button to the system. 3. The BIOS recovery function will auto reboot. 6. Install the DOK to boot the system and then press... Ctrl + Home. 4. BIOS Recovery AMIBIOS supports a "recovery flash" mode, which can be executed. 5. Put the AMIBoot.ROM to flash update...
... flash BIOS ROM. 1. This is used to a bootable USB flash drive(Disk on Key, DOK). 2. Please enter the setup menu to an operating system. Press power button to the system. 3. The BIOS recovery function will auto reboot. 6. Install the DOK to boot the system and then press... Ctrl + Home. 4. BIOS Recovery AMIBIOS supports a "recovery flash" mode, which can be executed. 5. Put the AMIBoot.ROM to flash update...