NATIONAL EXTENSION COLLEGE

                                   

                       30 Hour BASIC (ZX Spectrum edition)

                                

                              Cassette tapes guide

                                      by

                                  Paul Shreeve



How to find the programs on the tapes
Firstly catalogue your programs. This will help you use the tapes more easily.
- Set your tape recorder volume and tone controls to approximately half their 
maximum settings.
- If not already at its start, rewind your tape.
- Set your tape counter to zero.

For each program
- Note its starting tape counter reading.
- Key
LOAD "" (and ENTER)
without a space between the quotes. This will load the next program on the tape.
- Press the recorder play key.
You will see the following sequence of events:
The screen border areas of your television or monitor will flash alternately 
light blue and red whilst the computer is searching for a program. A short burst 
of red and light blue stripes will appear on the screen, followed by the program 
name.
- Note the program name.
Another short burst of red and blue stripes will be followed by a longer period 
of thinner blue and yellow stripes. This occurs when the computer is loading the 
program. When the program is successfully loaded, an 'OK' message appears on the 
screen.
- Stop the tape.
- If you wish to use the program, touch RUN followed by ENTER.
- If you are cataloguing the tape, touch NEW followed by ENTER, to clear the 
computer's memory.
You are now ready to use the same procedure to load the next program. In this 
manner, you can note the tape counter readings for all the programs on the two 
tapes.

Once your cataloguing is complete, you can use the tapes more easily. Wind the 
required tape until the tape counter number is slightly less than the starting 
number of the program you require.
Key LOAD "name" (and ENTER) then press play on your recorder. The computer 
responds with the searching and loading patterns as before.
N.B. the name must be exactly right. "SU M" is not the same as "SUM".
- If you have started too far back on the tape, other program names may come up 
on the screen. You can ignore these, as they won't be loaded. Once the computer 
has found your program it says:
     Program   Name
Wait until the 'OK' message appears on the screen. Then your program has been 
loaded.
To load if you don't the name
- Repeat the above but key
     LOAD "" (and ENTER) without a space between the quotes.

Fed up?
If a loading isn't working, or you find you are on the wrong part of the tape, 
hold down CAPS SHIFT and touch BREAK to stop the operation. Then touch NEW 
followed by ENTER.
If you do not see exactly the pattern of loading explained in the cataloguing 
advice, the program will not load successfully. If you started the tape at the 
right place, this usually means that the tape recorder volume and tone settings 
are wrong. Try adjusting these until you find the optimum settings; make a note 
of these for future reference and ease of loading.


                                   CONTENTS

UNIT and program numbers refer to the text of 30 Hour BASIC (ZX Spectrum 
edition). (Names in brackets are the names under which the programs are recorded 
on the tapes.)

How to find the programs on the tapes.

                                    TAPE 1

UNIT 1   Program 11   SUM, difference, product and quotient of two numbers (SUM)
         Program 13   Temperature conversion (TEMP)

UNIT 2   Program  1   Improved percentage program (PERCENT)
         Program  2   Percentage program for repeated use (P.REPEAT)
         Program  4   Percentage calculation with a terminating value (P.TERM)
         Program 12   Adding a counter to the percentage program (P.COUNT)
         Program 16   Cost of double glazing six windows (D.GLAZE)
         Program 17   Cost of double glazing N windows (D.GLAZE/N)
         Program 19   Compound interest (COMPINT)

UNIT 3   Program  1   Printing strings (STRINGS)
         Program  2   Print layout (PRINT/A)
         Program  3   The computer asks the questions (QUESTION)
         Program  5   Printing strings and numbers (PRINT/B)
         Program  6   Data recording service (RECSERV)
         Program  7   Bank interview letter (BANK)
         Program 11   Telephone directory (TELDIR)
         Program 12   First in alpha order (FIRST/A)
         Program 15   Product enquiry letter (ENQ-LET)
         Program 17   First in alpha-order (FIRST/B)
         Program 18   Capitals quiz (CAPITALS)

UNIT 4   Program  5   Reverse list program (REVERSE/A)
         Program 18   Using FOR....NEXT...to reverse a list (REVERSE/B)
         Program 22   Nested loops (LOOPS)
         Program 24   Finding the first item in alphabetical order (FIRST/C)
         Program 25   Printing odd numbered items from a list (ODDS)
         Program 26   Compound interest (CMPINT)
         Program 27   Squares and cubes (SQ/CUBE)
         Program 28   Multiplication tables (MULT)

UNIT 5   Program  1   Measuring word lengths (LENGHT)
         Program  2   Counting with a list counter (COUNTER)
         Program  4   Drawing a frequency distribution (FREQ/A)
         Program 10   Frequency distribution (FREQ/B)
         Program 13   String test (STRTEST)
         Program 15   Date check (DATES)
         Program 16   Validated input (TIMESTAB)
         Program 19   Vowel frequency (VOWELS)
         Program 20   Left most character (LEFT)


                                    TAPE 2

UNIT 6   Program  6   100 tosses of a dice (DICE/A)
         Program  9   Coin toss (COINS)
         Program 11   Toss of 2 coins (TWOCOINS)
         Program 17   Throw 1 die 100 times (DICE/B)
         Program 18   Throw 2 dice 100 times (DICE/C)
         Program 19   Frequency diagram (FREQDIAG)
         Program 21   Simple code (CODE)
         Program 22   Random 3 letter words (WORDS)

UNIT 7   Program  3   Coloured stripes (STRIPE)
         Program  4   Coloured messages (MESSAGE)
         Program  5   Coloured light (LIGHT)
         Program 12   Moving bus with road (BUS/A)
         Program 13   Blob drawing (BLOB)
         Program 18   Rainbow colours (RAINBOW)
         Program 21   Scale of C (SCALE)
         Program 23   London's burning (LONDON)
         Program 24   Darby Kelly (DARBY)
         Program 25   Bus with sound (BUS/B)

UNIT 8   Program  1   Arithmetic mean (MEAN)
         Program  2   Max and min (MAX/MIN)
         Program  3   Squares, cubes, reciprocals (SCR)
         Program 13   Iterative square not with trace (ITERATE)
         Program 14   Average length (AVLENGHT)
         Program 15   Mean of 100 throws (MEANTHR)
         Program 17   Histogram (HISTOGRAM)
         Program 18   Reciprocals (RECIP)
         Program 21   Compound interest (INT)

UNIT 9   Program  2   Sort routine (SORT)
         Program  4   Print subroutine in sort program (SORT/PRT)
         Program  5   Simulation of 'craps' (CRAPS)
         Program  6   Bisection search (SEARCH)
         Program  7   Reading data into an array (ARRAY)
         Program  9   Menu routine (MENU)
         Program 13   Submarine (SUB)


1200 baud edition, 1983

30 Hour BASIC (ZX Spectrum edition) is an introductory programming course 
written by Clive Prigmore (amended for the Spectrum by Paul Shreeve) and 
published by the National Extension College. The course is accompanied by two 
cassette tapes of the main programs in the course. These cassettes are also 
published by the National Extension College.

(C)NATIONAL EXTENSION COLLEGE TRUST LIMITED 1981

ISBN  0  86082  410  1