Computer ROM BIOS Modules As Part Of A Computer Hardware CourseIf you want to know how computers work, the first thing that you should know is what is computer ROM BIOS. It is built-in software in a computer system that enables a computer to start up without having to access programs from the hard disk. Any computer hardware course will teach the basics and probably advanced workings of this aspect of computer hardware. This article will look at what a computer hardware course should cover in this aspect and considerations that need to be made when joining a course to learn about the ROM BIOS function. On computer systems, BIOS contains all the codes that are critical to control the computer system components like the keyboard, display screen, disk drives, serial communications, besides other things. BIOS is a computer program used by the CPU to start the computer system. It is made accessible to the CPU through a removable programmable Read-Only Memory (EPROM) chip. It performs the first and the basic function of computer and provides a platform for other operating systems to load on the computer. A computer course should teach this basic information and then cover more advanced aspects later. However, BIOS does many other activities as well. For example, it also administers and regulates the smooth flow of data between the software and hardware. This means it manages the flow of data from the operating system to the hardware. The hardware could include: hard disk, keyboard, mouse, scanner, besides printer and other things. The hardware course should make these specific functions clear and modules about this should be an integral part of the course curriculum. The other notable function that the computer ROM BIOS performs is that it detects all important computer accessories attached to the main system and ensures that they are fully functional. This way it also ensures that they have no conflicts with the main operating system. BIOS is created by the hardware manufacturers and comes in-built with the motherboard. The PCs of yesteryears used a ROM BIOS, but modern PCs use a flash memory BIOS. The reason for its preference is that it can be updated. A computer course should teach how the ROM BIOS can be updated to keep the PC functioning, and should give a good amount of time to teaching this. Although normally attached to the ISA bus, ROM BIOS may be attached to an alternate bus (for example, the system memory data bus) located within the system, in the process eliminating the need for ISA bus from the computer system. The strategic placement of BIOS ensures that it is always available, and it is not destroyed or damaged by disk failures. It also allows a computer system to self boot or boot on its own. All PC BIOS are of more or less of equal standards. All PCs are quite similar at this stage even though there are different BIOS versions. Additional DOS functions are normally added through software modules. It means the customer can upgrade to a newer version of DOS without changing the BIOS. The hardware course should teach how to upgrade BIOS and ensure the PC continues to function. The Computer ROM BIOS carries instructions related to loading the main computer hardware. The BIOS also includes a test called a POST that takes care that the computer system meets the requirements to boot up nicely. In case the computer does not pass the POST, the customer receives a signal that clearly show what is wrong within the computer system. A computer hardware course should effectively teach this diagnostic element, and it is a good idea to ensure that the working and functions of ROM BIOS are part of the course curriculum before enrolling. |