Graphics On The BBC Microcomputer

This cassette contains the programs and procedures in the book Graphics On The BBC Microcomputer. You will need the book to make proper use of this cassette.

Graphics On The BBC Microcomputer is for the hobbyist, student and professional alike. You can use it at any of three levels:

1. To see what can be achieved with graphics on the BBC Microcomputer;
2. To produce pictures, shapes, graphics, histograms, pie charts, etc, to display your own data;
3. To learn how to program graphics on the BBC Microcomputer.

All programs and procedures will run on the Model B. The cassette contains teletext versions of most of the programs and procedures, for use on a Model A.

In this wallet you will find notes on how to load and run them.

The tape contains the programs and procedures used in Graphics On The BBC Microcomputer.

The programs are saved under the numbers which are used in the book. As the book explains, all the procedures which are required for any one type of display are saved together under a single, descriptive name. For example, the procedures for setting up the fundamentals of graphical displays are saved under COMP, for composite, and the procedures which are specially for drawing histograms are saved under HIST.

The programs and procedures are saved in the order in which the book introduces them. All programs up to 7.3 function without any procedures. Program 8.1 requires the procedures which are saved under TEXT. Therefore, TEXT comes before Program 8.1. Similarly the other procedures come before the programs for which they are required.

Everything on the tape is stored in the *EXEC format. Generally, to move onto another program, you will find it sufficient to remove all lines between 0 and 1000 and then *EXEC the next program into the computer, as described in Section 0.2 of the book. In this way the procedures will stay in the computer and the tape can be played through without having to be rewound.

The following is a complete list of the programs and procedures on the tape:

1.1, 1.2, 1.3
3.1
4.1
5.1, 5.2
6.1, 6.2, 6.3, 6.4
7.1, 7.2, 7.3
TEXT
8.1
COMP
9.1, 9.2, 9.3
10.1, 10.2
11.1, 11.2
HISTO
12.1, 12.2, 12.3, 12.4
PIE
13.1, 13.2
14.1
TCOMP
15.1, 15.2, 15.3, 15.4, 15.5

The procedures saved under TCOMP, for Teletext-composite, contain teletext equivalents of almost all of the procedures, plus some additional ones. They enable teletext versions of most of the programs to work on a Model A BBC Microcomputer.

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All programs: CHAIN"" (RETURN)