ALPHABET TIMER for Sinclair ZX-81
by P Fisher
from Sinclair Programs, July 1983

This short program, Alphabet Timer, was written by P Fisher of Newton
Heath, Manchester for the 16K ZX-81 to help those who are not yet familiar
with the QWERTY keyboard.

Once the word 'GO' is displayed, you must type-in the entire alphabet, in
order, as quickly as possible. the computer will then give you a score in
its own time units. The fastest time achieved in the Sinclair Programs
office was 179 units.




BLACK HOLE DESTROYER for Sinclair ZX-81
by D Basson and J Robery
from Sinclair Programs, July 1983

Programs based on various symbols scrolling up the screen are sumbitted
frequently for review. D Basson and J Robery of Wickford, Essex have taken
the idea and used it in a slightly unusual way in Black Hole Destroyer.

Black holes move up the screen and you must run into as many of them as
possible before your fuel runs out. Move using keys 5 and 8. (16K ZX-81).





BOWLING for Sinclair ZX-81
by Brian Skitt
from Sinclair Programs, July 1983

Several Skittles are displayed on the left-hand side of the machine and a
ball is bowled automatically from the right. Move the ball up and down with
the normal cursor keys to knock down as many skittles as possible.

Bowling was written for the 1K ZX-81 by Brian Skit of Willenhall, West
Midlands.

[This program actually requires 16K]




CHARACTER ENLARGER for Sinclair ZX-81
by Paul Baylis
from Sinclair Programs, July 1983

This short program for the 16K ZX-81 will enlarge letters and some
characters to six times their normal size. Characters which it is unable to
enlarge will be rejected automatically. The program asks for the letter to
be enlarged and the X and Y co-ordinates of its top left-hand corner.
Entering the co-ordinates 5 and 5 will lead to your letter being printed at
the top left of the screen.

Character Enlarger was written by Paul Baylis of Grey College, Durham.




FORMULAE for Sinclair ZX-81
by David Hughes
from Sinclair Programs, July 1983

David Hughes of Tunbridge Wells, Kent found, when he was teaching
chemistry, that pupils were having problems with Formulae. So he used his
16K ZX-81 to write a program which could be used to test anyone's knowledge
of chemical notation.

The program contains full instructions and works on a 16K ZX-81. When you
are asked for the response 'Yes' or 'No', enter either 'Y' or 'N' rather
than the full word.





FROGGER for Sinclair ZX-81
by R Watts
from Sinclair Programs, July 1983

Owners of 1K ZX-81s are making it clear that there is no program for the
16K ZX-81 or Spectrum which cannot be adapted in some way to run on the
smaller machines.

R Watts of Worthing, Sussex has written a Frogger program for the 1K
machine. your frog must cross four lines of traffic hopping into an empty
from home.





GOTCHA for Sinclair ZX-81
by Paul Sutton
from Sinclair Programs, July 1983

Gotcha is an exciting game for the 1K ZX-81 which can be played again and
again without becoming boring. It requires some skill and forethought.

It was writen by Paul Sutton, a law student of Cardiff, South Glamorgan. He
owns a ZX-81 with 16K RAM pack, which he uses normally to help him in
fantasy games, such as dungeons and dragons.

You - an asterisk - must avoid the two intelligent ghosts - inverse
asterisks - for as long as possible. As each of you leaves a trail, it can
become impossible to spot the ghosts for long periods.

Remember that you can cross your own trail or that of the ghosts, that you
can move only in the upper half of the screen, and that you can move faster
that the ghosts. Your movement is controlled by the usual cursor keys.
Start by entering GOTO 1.





MAZE MAKER for Sinclair ZX-81
by J D Webster
from Sinclair Programs, July 1983

When run, Maze Maker, written by J D Webster of Wetherby, West Yorkshire
will produce a random maze. The routine could usefully be added to many
games programs. In each maze there will be a possible route from A$(2, 15)
to the bottom of the screen. The program takes two minutes to run, so be
prepared to wait for your maze. (16K ZX-81).





MINI MAP for Sinclair ZX-81
by Steven Lawther
from Sinclair Programs, July 1983

Steven Lawther of Witton Gilbert, County Durham has written Mini Map for
the 1K ZX-81. It will produce a map of England, Scotland and Wales on the
screen. It is useful on its own for geography or as a routine in a larger
program on a 16K machine.





REPETITION for Sinclair ZX-81
by Ian shelley
from Sinclair Programs, July 1983

Ian Shelley of Beaminster, Dorset has written a simple memory-testing
program, for use on the 1K ZX-81. In Repetition a number will be displayed
on the scrteen and will then disappear. Type that number. Another number
will be displayed and vanish. Type the first number and then the second.
That will continue for 12 numbers. Cna you remember them all?





SIMULTANEOUS EQUATIONS for Sinclair ZX-80
by Mike Davies
from Sinclair Programs, July 1983

Programs for the ZX-80 are becoming few and far between, while good-quality
programs for the 16K ZX-81 and Spectrum are increasing rapidly in number.
Therefore we were pleased to receive Simultaneous Equations, which was
written by Mike Davies of Llandeilo, Dyfed for the ZX-80 to help him while
working for his mathematics O level.

Enter each of the co-efficients A, B, C, D, E and F, followed by NEWLINE,
and the computer will solve the equation.





