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In the world of computers today, there are countless different types of portable bios and diags. Besides operating systems and software, a portable bios or a portable diag is a small device that provides diagnostic information about your computer's hardware configuration. The possibility to work with these devices is broad. Not only can they be used to troubleshoot your computer in case something goes wrong but they can also be useful when cloning hard drives, creating bootable disks etc. In this article we will summarize the different types of bios and diags from various manufacturers, how to find them when you don't know their name or where they are located on your system and which ones you should use in which scenario. Also, I will include some tips on how to work with these files. So grab a cup of coffee, sit back and enjoy the read! The history of bios goes all the way back to about 1970. It was then that Gary Kildall, an employee at Intel, wrote a program called "Interrupt Routine" on a PDP8 computer which would run continuously in the background of the computer's memory and check for any interrupts or hardware requests. Ted Hoff, one of Intel's founders suggested this idea because it could save programming time by having certain functions running instantly if they were needed rather than writing new code for every use case. He also wanted to simplify the program and minimize its size. Kildall implemented this idea in his program and named it "BIOS" because it would boot the computer whenever the system was switched on. The first BIOS appeared around 1972 when Intel released the first 8086 processors and Digital Equipment Corporation (DEC) wrote a BIOS for them.[9] Diverse manufacturers like IBM, Tandy, HP, Apple and even Alpha Microsystems produced their own software in order to support their computers or hardware components. In the beginning, a BIOS was stored on a read-only memory chip. In modern computers, it can be found on a flash memory or an EEPROM. In the mid-1970s when IBM was designing the first PC, they realized that they needed a program which would allow their computer to function when it started up. In order to achieve this goal, they came up with the idea of combining hardware and software into one single program that would run instantly whenever the computer needed it without slowing down processing speed. They decided to use Gary Kildall's BIOS which they had bought from him for $24,000 in 1976. This solution was significantly more complex than the previous BIOS, which were running by means of simple software interrupts. The design of these new programs required a substantial investment which required level-headed people like Bill Gates and Steve Jobs. The first version of DOS (Disk Operating System) which was released by IBM contained the first BIOS file on the same floppy disk as DOS itself, which was approximately 1.44 megabytes (MB). When DOS was launched on August 24, 1981 it contained four files: MS-DOS (Main System), MS-DOS (System), PC-DOS (Media) and PC-DOS/8 (Boot Diskette). Another file for diagnostics was added later on with version 3. cfa1e77820
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