The Flash program used depends on the Bios and mother board you have
Most are a simple program that works in PURE DOS..
By Pure DOS they mean NO DRIVERS
the boot disk should have Nothing on it but.
IO.sys, Msdos.sys , and Command.com
To that disk you would copy the Flash program and the new Bios file
Write down the exact name of the bios update file
For example ( am1011.awd )
Check your documentation for Bios Updates.
Some mother boards require a Jumper to be set to allow bios updates.
Other control the Bios update in the Bios.
Make the appropriate setting change to allow the update.
Then boot from the Floppy
At the A:\ prompt start the Flash program
At the first screen it should show you current Bios info. ( Version and Date)
It should have two options at least
1. Save current bios
2. Write new bios.
Use the First Option
Save the old bios using the same file name format as the new one.
(IE: am1000.awd ) bios name and version number
It will save it to a file on the floppy
Then use the second option 2
when it asks for the new bios name type in the name exactly including extension
Follow the screen comments and process .
It should ask are you sure.
When it is finished writing the new bios it should display a comment
That the Bios WAS Flashed Successfully
Once it has finished you can exit the flash program and reboot
During the reboot.
Enter the Bios and use the option “ LOAD System Defaults “
This will load all the New bios and all the updates included
Make any adjustments you need or want to fit your hardware setup
Save the Changes and exit
Reboot and you should be good to go