When updating bios what is important
The BIOS firmware comes pre-installed on a personal computer's system board, and it is the first software to run when powered on.
The name originates from the Basic Input/Output System used in the CP/M operating system in 1975.
Also, when errors occur at boot time, a modern BIOS usually displays user-friendly error messages, often presented as pop-up boxes in a TUI style, and offers to enter the BIOS setup utility or to ignore the error and proceed if possible.Instead of battery-backed RAM, the modern Wintel machine may store the BIOS configuration settings in flash ROM, perhaps the same flash ROM that holds the BIOS itself.When we failed to produce an operating system in a timely manner, Glenn started talking with Gary about CPM ...This program allowed the user to set system configuration options, of the type formerly set using DIP switches, through an interactive menu system controlled through the keyboard.In the interim period, IBM-compatible PCs—including the IBM AT—held configuration settings in battery-backed RAM and used a bootable configuration program on disk, not in the ROM, to set the configuration options contained in this memory.
Options on the IBM PC and XT were set by switches and jumpers on the main board and on expansion cards.