Upgrading and Repairing PCs (19th Edition) by Scott Mueller

By Scott Mueller

Nice e-book: it really is thorough and what is extra, the accompanying CD comprises twelve movies during which the writer explains diversified elements: 5 of them clarify Processors, Motherboard, Chipsets, reminiscence and tough Disks and the rest seven take care of functional install matters. The video clips are rather brief, so that they are meant as an summary: 25 mins for the Processors video (the longest one) and 4,5 mins for the shortest one.
I quite pass over extra movies explaining huge elements of the publication or the complete publication, similar to attending a path.

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More software has been written for this computer family than for any other system on the market. The PC Industry Nearly 30 Years Later In the nearly 30 years since the original IBM PC was introduced, many changes have occurred. 77MHz 8088-based system to 3GHz (3,000MHz) or faster Core i7–based systems—about 100,000 or more times faster than the original IBM PC (in actual processing speed, not just clock speed). 0, whereas modern systems can have several terabytes (trillion bytes) or more of hard disk storage.

Since that fateful decision was made to use an Intel processor in the first PC, subsequent PC-compatible systems have used a series of Intel or Intel-compatible processors, with each new one capable of running the software of the processor before it. Although the 8086 was a great chip, it required expensive 16-bit board designs and infrastructure to support it. To help bring costs down, in 1979 Intel released what some called a crippled version of the 8086 called the 8088. The 8088 processor used the same internal core as the 8086, had the same 16-bit registers, and could address the same 1MB of memory, but the external data bus was reduced to 8 bits.

The operating system (such as DOS or Windows) uses the drivers in the BIOS to control and communicate with the various hardware and peripherals in the system. ◊◊ See Chapter 5, “BIOS,” p. 313. The method they used to legally duplicate the IBM PC BIOS was an ingenious form of reverseengineering. They used two groups of software engineers, the second of which were specially screened to consist only of people who had never before seen or studied the IBM BIOS code. The first group studied the IBM BIOS and wrote a detailed description of what it did.

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