Spacegate Station Academy Lesson 3

American Standard Code for Information Interchange

• Unit 1 What is ASCII • Unit 2 The ASCII Table • Table Practice

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Lesson 3 - ASCII Unit 1 What is ASCII

1. Computers deal with ______, so to get them to work with text we need to represent each ______as a number.

2. When the computer displays ______, what it has done is ______into text so that humans can understand it.

3. For ______to be stored and processed by all computers, it is important that they ______the data in the same way.

4. A ______method was created that defined what numbers should be used to represent all the ______in the English language.

5. This method was called the ______or ASCII.

Unit 2 The ASCII Table

6. The ASCII table defines all numbers between ____and _____127.

7. The numbers from 0 to 31 represent ______characters, meaning characters that are not ______.

8. These characters control how the data should be interpreted. a. ______- represents a new line. b. ______- indicates the end of a string of text c. ______- indenting text d. ______- deletes the previous character

9. Note that there are different hex numbers for ______and ______letters.

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ASCII Table Practice

The computer terminal that allows direct data input to the maneuvering engines on Spacegate Station only accepts hexadecimal data input for processing the commands to operate. Normally this input is transferred to the computer terminal automatically by the Stations Navigation Computer which receives its information form Mission Control. Instructions: You will practice converting the command values for input into this system which you should be familiar with from Lesson One on Gravity and Orbits. Convert the Command 1, Command 2, Value, and Command 3 for each line into hexadecimal data using the ASCII table. Do not place separations or commas between numbers. Problem 1

Input Data Command 1 Command 2 Value Command 3 ASCII Code Present Orbit Location Start of Text Device Control 1 K27 Carriage Return Desired Orbit Location File Separation Device Control 2 M27 Null

Problem 2

Input Data Command 1 Command 2 Value Command 3 ASCII Code Present Orbit Location Start of Text Device Control 1 J21 Carriage Return Desired Orbit Location File Separation Device Control 2 M21 Null

Problem 3

Input Data Command 1 Command 2 Value Command 3 ASCII Code Present Orbit Location Start of Text Device Control 1 F14 Carriage Return Desired Orbit Location File Separation Device Control 2 C14 Null

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ANSWERS

Problem 1

Input Data Command 1 Command 2 Value Command 3 ASCII Code Present Orbit Location Start of Text Device Control 1 K27 Carriage Return 2114B3237D Desired Orbit Location File Separation Device Control 2 M27 Null 1C12124D32370

Problem 2

Input Data Command 1 Command 2 Value Command 3 ASCII Code Present Orbit Location Start of Text Device Control 1 J21 Carriage Return 2114A3231D Desired Orbit Location File Separation Device Control 2 M21 Null 1C124D32310

Problem 3

Input Data Command 1 Command 2 Value Command 3 ASCII Code Present Orbit Location Start of Text Device Control 1 F14 Carriage Return 211463134D Desired Orbit Location File Separation Device Control 2 C14 Null 1C124331340

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