Bbc 2201 hardware systems support and maintenance notes

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PERSONAL COMPUTING HISTORY (PC HISTORY)The first original PC emerged in 1981 and was manufactured by TBM CompanyIt features included:1. Supported 8 bit and 8088 microprocessor2. 64 KB RAM upgradeable to 640 KB only accommodate DOS and DOS basedprogrammers.3. 360 KB floppy disk drive (Drive A)4. 25 inches text display using a colour graphics adapter (Displayed any text and notimages, but in different colors– In 1982 there was the development of Extended technology PC (PC XT)Which had the following complements added to it1. An additional floppy disk drive2. A hard disk facility – capacity of 10 MBThis computer, which referred to as a standard PC because it had a hard disk and twofloppy disk, drives- In 1984 saw the development of an advanced technology PC (PC AT) which had thefollowing advanced features:1- A faster processor 802862- Higher memory capacity IBMThis processor (80286) was capable of processing 16 bits of data- The development of PC is based on two main features.1 – Further development of microprocessors2 – Increased capacity on both memory capacity and disk drives.SYSTEMBASEDYEAR OFDEVELOPMNTMICROPROCESSORRAMFLOPPYDISKHARDDISKVIDEOGRAPHICSMAXIMUMSPEEDPC1981808864-640KB360KBNoneText/8 MHzGGAXTAT19821984808880286640-720KIBM360KB720MB10MB20MB386DX198680386DX2BM1.2-1.44MB100MB386SX198880386SX2BM1.2-1.44MB100MB486DX199080486DX4BM1.2-1.44MB340MB486SX19 … Purchase document to see full attachment

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