THE SETUP OF BIOS
The majority of BIOS have a "setup" (program of configuration) which makes it possible to modify the basic configuration of the system. This type of information is stored in a car-fed memory (using a pile) so that the information is stored even when the system is out-tension (the read-write memory is re-initialized with each restarting).
There are many BIOS in each machine:
The BIOS of motherboard
The BIOS which controls keyboard
The BIOS of video adapter
The BIOS of controllers SCSI which allows booting on peripheral SCSI, which communicates with DOS without additional pilot.
BIOS of network card, which allows network bootup.
When the system is started, BIOS posts a copyright message to the screen, then carries out initialization and diagnostic tests. When all the were carried out, BIOS posts a message inviting user to press one or more keys in order to enter BIOS setup.
According to BIOS mark, it can be key F2, key F10, key LED (only on French keyboards: "Support"), or of one of the following sequences of key:
< Ctrl>+
+
< Ctrl>++
< Ctrl>++
On BIOS Award the following message is posted at the time of the POST:
"TO ENTER SETUP BEFORE BOOT PRESS Ctrl-alt-esc GOLD LED KEY"
This message means "PRESS" Ctrl-alt-esc "or key" LED "to enter the" SETUP "before the starting of the PC"
REINITIALISATION OF BIOS
Setup of BIOS makes it possible to modify material parameters, it can prove that system becomes unstable, even does not start again more. Thus, when that arrives, it becomes necessary to cancel modifications made to BIOS and to give default settings.
If computer starts and access to BIOS setup is possible, this makes it possible to restore default settings. On Phoenix BIOS, support on F9 key makes it possible to restore the default manufacturer settings. On Award BIOS, support on F5 key restores the preceding parameters, support on F6 restores default values of Award BIOS, finally F7 key makes it possible to restore default settings provided by motherboard manufacturer.
If access to BIOS is impossible by standard procedure, majority of motherboards are equipped with a rider (jumper) on the motherboard making it possible to restore default values. It is enough to change the position of the jumper, and leave in this new position during ten seconds.
HOW TO FLASH A BIOS?
Boot under DOS, once provided with update of your BIOS diskette, start under DOS prefer a session of real DOS to a line of order under Windows. Attention, certain manufacturers propose utilities of flashing under Windows (Asus, MSI), but this solution proves to be risky in the event of instability of Windows during flashing.
(Note: certain BIOS can be written on motherboard only in configuration clear NVRAM/clear CMOS. In such case, check motherboard guide to know the side jumper has to be moved, with a screwdriver and plug in the entrails of board!)
To carry out program if your PC does not start on diskette, you will have initially enter BIOS editor and change parameters. It is now a question of replacing file of existing BIOS by its update. In general this procedure is done thanks to achievable which requires the place of you where the file is then takes care of the remainder. If not, according to the mark of your BIOS, type:
> for a BIOS Award:: awdflash xxx.bin or pflash xxx.awd
> for a FRIENDLY BIOS:: amiflash xxx.bin
> for a BIOS MrBios:: mrflash xxx.bin where xxx are the name of the file of instructions corresponding to the model of your BIOS.
If it is proposed to you do not hesitate to safeguard your version of existing BIOS. One never knows...
Flashing BIOS should not be stopped.
Take care that there is no interruption. Start again/shut down your PC only one time the procedure carried out in the long term. (If you clear of NVRAM/CMOS, think of replacing jumper in its initial position.)