Tandy 1000 Basic Reference Manual

Chapter 5 / Basic Concepts
43
Elements of a Program 43
Data 44
Constants 46
Variables 47
Declaring Numeric Constants and Variables
47
Numeric Constants 48
Numeric Variables 48
Numeric Precision Conversion 49
Manipulating Data 51
Arithmetic Operators 51
String Operator 52
Relational Operators 52
Logical Operators 54
Hierarchy of Operators 55
Functions 56
Chapter 6 / Arrays 59
Types of Arrays 62
Defining Arrays 63
Chapter 7 / Disk Files 67
Sequential Access Files 67
Creating a Sequential Access File 68
Updating a Sequential Access File 69
Direct Access Files 70
Creating a Direct Access File 71
Accessing a Direct Access File 73
Chapter 8 / Displaying Color and Graphics 77
Resolution 77
78
Video Pages 79
Selecting Screen Modes 80
Specifying Coordinates 82
Chapter 9 / Introduction to BASIC Keywords 85
Format for Chapter 10 85
Terms Used in Chapter 10 86
Statements 87
Chapter 10 / BASIC Keywords 97
Functions 92
4

Tandy 1000 Specifications

General

Processor	Intel 8088
Processor Speed	4.77 MHz
RAM	128 KB (expandable to 640 KB)
Operating System	MS-DOS 2.11
Manufacturer	Tandy Corporation
Release Year	1984
Storage	Single or double 5.25" floppy disk drive (360 KB), optional hard drive
Sound	Tandy 3-voice sound
Ports	Parallel, Serial
Graphics	CGA (Color Graphics Adapter)
Graphics Modes	320x200, 640x200