Four in a Row: Play against each other or against the micro! 2

Published:2011/8/5 7:21:00 Author:Amy From:SeekIC

By Steve Teal

Operation

When used in combination with shift key SI, column switches 1 to 7 (S2 to S8) have a different function. To access these func­tions you first have to hold down the shift key, then momentarily press the required column switch. The shift key can then be released again.

Switch Function

1 New game
2 Undo the last move
3 Two players
4 One player / micro
5 Sound off
6 Sound on
7 Kaleidoscope

New game: When this switch is pressed during a game, the board is wiped clear and a new game starts. When you play against the microcontroller you will have the first move.

Undo the last move: Every move can be undone. If you press this switch repeatedly it is even possible to go right back to the beginning of a game. After you have gone back a move, it is always the turn of the human player. This can result in a change of sides during the game. In that case you should press switch 4, which forces the micro to make a move.

Two players: If you press on ’two players’ then two people can play against each other.

One player / micro: This switch lets you play against the AT micro. It can also be used to force the micro to make a move at any time. Pressing it repeatedly therefore makes the microcon­troller play against itself.

Sound on/off: These switches turn the sound effects on and off. Each player is represented by different sounds. A short beep is made whenever a switch is pressed.

Kaleidoscope: This was added just for fun, as there was still some room left in the Flash memory and a spare switch was available. LEDs are randomly turned on and off in symmetrical patterns on the display. The colours are limited to red and green; the yellow/orange combination isn’t used. Note that you will lose any game in progress when you select the kaleidoscope function. Furthermore, the power-down timer is not active in this mode, so you have to take care that you don’t drain the batter­ies. Pressing any of the column switches will exit from the kalei­doscope mode.

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