## BTEC National Diploma Computer Systems WorkbookThis workbook guides the student through all the learning activities required to meet the criteria for Unit 2: Computer Systems in the BTEC Nationals for IT Practitioners. The workbook is task-oriented and allows students to proceed at their own pace. |

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### Contents

Halfadder and truth tables 12 | 4 |

Binary arithmetic and binary conversion 13 | 10 |

Binary conversion octal and hexadecimal 23 | 65 |

Computer memory 29 | 66 |

Data in memory | 69 |

Parity boolean and binary coded decimal 36 | 73 |

Binary coded decimal and colour 41 | 78 |

Colour computer arithmetic and twos complement 45 | 82 |

Floating point addition and subtraction 62 | 99 |

Floating point multiplication and division 1 71 | 108 |

Disassembly of a PC 76 | 110 |

CPU and motherboard 80 | 114 |

PC components and peripherals 1 83 | 117 |

Building a computer to a specification 1 92 | 122 |

Low level programming 1 99 | 123 |

Bit mask and operating systems 114 | 138 |

Binary addition and subtraction 50 | 87 |

lntegers real numbers and floating point numbers 54 | 91 |

Overflow underflow and floating point arithmetic 59 | 96 |

Achievement Record 122 | 146 |

### Common terms and phrases

12-bit mantissa exponent 2's complement ADD R1 addition and subtraction arithmetic and binary arithmetic and two's ASCII and logic ASCll character Assemble Assembly Language Binary addition Binary arithmetic binary coded decimal binary conversion continued Bit mask boolean and binary byte computer arithmetic Decimal Number decimal point denary digits display enter the number Fixed Point Floating point addition Floating Point Arithmetic floating point numbers following binary numbers getChar getlnt HOV Hex Editor hexadecimal HOV RO instruction integer Lesson 15 Lesson 28 logic gates continued Logic Simulator Low-level programming Macromedia Shockwave mask and operating Motherboard mylnt myString numbers and floating operating systems continued output parity bit program and enter R2 HOV real numbers Real-time operating system Register Run the program second number Step 2 StepS Step1 subtraction continued SWI getlnt Truth Table two's complement Valve2 ValveS Valve4 Valve4 ValveS ValveS Valve6 Witness Date Task write