How to update the old BIOS program?

General motherboards provide the ability to upgrade the BIOS, specific details please refer to the relevant motherboard operating manual, the following only for a brief introduction. First, open the chassis and set the BIOS erasable jumper to Enabled (refer to the manual for the location of the route), default to Disabled. Start the computer with a boot disk that does not contain Config.sys and Autoexec.bat. Plug the disk that comes with the motherboard into the computer floppy drive and start Pflash. When the program is started, select 3. Then select 2. The program will prompt you to give the BIOS file name, you simply type the file name of the file you want to upgrade (note the full path), then press Y, press ESC, then press N, press ESC, and power off. Don't forget to jump the jumper back to the original, reboot, everything is done.