Hardware
Motherboard. The PC is built around a single large circuit board called a motherboard which carries the processor,...
CPU and RAM. The CPU is an Intel 8088, a cost-reduced form of the Intel 8086 which largely retains the 8086's internal...
ROM BIOS. The BIOS is the firmware of the IBM PC, occupying four 2 kB ROM chips on the motherboard. It provides...
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Hardware Motherboard. The PC is built around a single large circuit board called a motherboard which carries the processor,... CPU and RAM. The CPU is an Intel 8088, a cost-reduced form of the Intel 8086 which largely retains the 8086's internal... ROM BIOS. The BIOS is the firmware of the IBM PC, ...
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the IBM Personal Computer (PC) family by offering significant price performance enhancements. A standard configuration includes an Intel 80286, 6 MHz microprocessor with zero wait-state, 640 KB of planar memory, a 1.2 MB diskette drive, a 20 MB fixed disk and a serial/parallel adapter. A second internal diskette drive may be
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Keyboard. Size: - Width - 20", Depth - 8", Height - 2". Weight: - 6 lbs. Keys: - 83 full-function for data and text entry: includes 10 for numeric entry and cursor control and 10 special function for scrolling, editing, etc. - Easy access to 256 characters (ASCII and Special) Keyboard:
Electrical: 120 v. AC
Size: Width-20", Depth-16", Height-5.5"
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1986: April - IBM announces the IBM PC Convertible, 80C88-based, 256K RAM, and two 720K floppy disks, for US$2000. 1986: April - IBM discontinues the IBM Portable PC. 1986: September - IBM announces the IBM PC-XT Model 286, with 640KB RAM, 1.2MB floppy drive, 20MB hard drive,serial/parallel ports, and keyboard for US$4000.
Model: 5140 "Convertible"
Released: April 1986
Price: US $1,995
Weight: 12 pounds / 5.5 kg
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1986: April - IBM discontinues the IBM Portable PC. 1986: September - IBM announces the IBM PC-XT Model 286, with 640KB RAM, 1.2MB floppy drive, 20MB hard drive, serial/parallel ports, and keyboard for US$4000.
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5170 IBM PC AT (Advanced Technology) Date Announced: 1984: Date Canceled: 1987: Number Produced: Hundreds of Thousands+: Country of Origin: USA: Price: Approximately $6,000 base: Current Value: $10-$100: Specifications---Processor: Intel 80286: Speed: 6 MHz at introduction, later 8 MHz: RAM: 256K-16MB: ROM: 64K: Storage: Expansion: 8 expansion …
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The first one can accept from 64k to 256k RAM, whereas the later one has support for 640K RAM max, the 101-key keyboard, a 3.5'' FDD and a few other details... In addiditon to the removal of the cassette port, the XT also had eight 8-bit ISA expansion slots VS the PC's five.
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Nov 09, 2019 . The original IBM PC wasn't very powerful (and was certainly less powerful than lot of 8 bit computers at the time). The very first PC’s had only 16 KB RAM and no floppy disk units, they used cassettes to load & store programs (notice that the commands to handle the cassette drives were present in the operating system all the way up to MS-DOS 5!).
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The IBM PC AT came with a 192-watt switching power supply, significantly higher than the 130-watt XT power supply. According to IBM's documentation, in order to function properly, the AT power supply needed a load of at least 7.0 amperes on the +5 V line and a minimum of 2.5 amperes on its +12 V line.
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The IBM PC AT came in a variety of its own “sub-models” over a three-year period. Documentation is available below. 5170 Models 68 and 99 Models 68 and 99 were introduced in August 1984: Model 68 Type 1 motherboard 6 MHz CPU 256Kb RAM Rev 1 BIOS dated “01/10/84” Model 99 All of the above 256Kb additional RAM (total of 512Kb) 20Mb Hard Drive
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Apr 17, 2003 . 1981 - IBM PC - 8088, 4.77 MHz IBM XT - 8088, 4.77 MHz (adds a hard disk) IBM AT - 80286, 6-8 MHz (the 286 breaks the "640K barrier", but only with a special "protected mode" in which normal programs won't run; a slot extension is added to bring the IBM PC bus to
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Specs Basically an IBM PC-XT – Intel 8088 @ 4.77MHz 256K of memory. Twin Floppy disk drive (or single) 80 x 25 Text display (CGA) Weighed 30lb. US $4225 at launch Original IBM portable rear Expansion slots – ISA I never owned one of these, and frankly never wanted to. Wikipedia entry Youtube video of one
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IBM PC used one 14.31818 oscillator to drive both the CPU and video. For video it was divided it by 4 (14.31818 / 4 = 3.58 MHz), and for CPU it was divided by 3, which why it was running at 4.77 MHz, and not at 5 MHz. **Initially, there was no IBM support for hard drives at all. The limits were: - DOS 1.0 and 1.1 had no hard drive support.
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We went from a 4.77MHz processor, 64kB of memory, a wired keyboard, two floppy drives, and an 11.5-inch CRT screen that displayed text in one color (green), to a couple of technological marvels.
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The best is Lenovo’s ThinkPad X1 Extreme Gen 3, a 15.6-inch laptop offering the best mainstream components with the usual ThinkPad aesthetics, build quality, and support.
Yet IBM doesn’t sell computers anymore. You can’t go to a store and buy IBM-branded anything. The company completely changed their business model in recent years to focus on more complicated, big-ticket items while the personal computer market crashed and burned. (They even sold their ThinkPad business to Lenovo several years back.)
The IBM Personal Computer (model 5150, commonly known as the IBM PC) is the first computer released in the IBM PC model line and the basis for the IBM PC compatible de facto standard. Released on August 12, 1981, it was created by a team of engineers and designers directed by Don Estridge in Boca Raton, Florida .
The IBM Personal Computer/AT (model 5170, abbreviated as IBM AT or PC/AT) was released in 1984 as the fourth model in the IBM Personal Computer line, following the IBM PC/XT and its IBM Portable PC variant. It was designed around the Intel 80286 microprocessor .
ISBN 9781591842378. ^ Musil, Steven (October 28, 2013). "William Lowe, the 'father of the IBM PC,' dies at 72". CNet. Retrieved January 8, 2015. ^ Atkinson, P, (2013) DELETE: A Design History of Computer Vapourware [1], London: Bloomsbury Publishing. ^ Scott, Greg (October 1988). " " Blue Magic": A Review". U-M Computing News. 3 (19): 12–15.
While the IBM Personal Computer incorporated the designation in its model name, the term originally described personal computers of any brand. In some contexts, "PC" is used to contrast with "Mac", an Apple Macintosh computer.