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Written in Microsoft Amiga BASIC, the Amiga version of Laser Chess duplicates almost exactly the original version of the game, which was written in the Modula-2 language for the Atari ST.
The Commodore 64 version of Laser Chess uses high-resolution graphics and sprites to good advantage.
Laser Chess for eight-bit Atari computers uses a graphics mode available only the Atari XE and XL models.
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The Apple II version of Laser Chess employs keyboard controls and runs on any Apple Il-series computer.
ory and Microsoft Amiga BASIC. At the beginning of the game, you can choose between filled and unfilled playing pieces by pressing F or U, respectively. This option affects only the appearance of the pieces.
Amiga Laser Chess is played with the mouse, just like the original version for the Atari ST, To move a piece, position the mouse pointer over the desired piece and hold down the left mouse button. When the ghosted image of that piece appears, you can either drag the piece to a new location or rotate it by pressing a key. Release the mouse button to drop the piece in its new location.
The color of the playing-field border indicates the number of turns remaining and whose turn it is. There are three buttons to the left of the board. To select a button, move the mouse pointer over the button and press the left mouse button. The button labeled L fires the laser.
Commodore 64 Version
This version of Laser Chess (Program 2) requires at least one joystick. Since the program is written in machine language, it must be typed in with the "MLX" machine language entry program printed elsewhere in this issue. Here are the starting and ending addresses for MLX:
Starting address: 0801 Ending address: 1BBS
A cursor indicates your position on the board. Use the joystick to move the cursor over the piece you wish to move. (If you have only one joystick, plug it into port 2. You can simulate the second joystick by pressing the left-arrow, 1, 2, and CTRL keys to move the joystick left, right, up, and down, respectively, and pressing the space bar as a substitute for the button.)
To select a piece, hold down the fire button. To rotate a piece, move the joystick and press the button at the same time. To move a piece, move the pointer to the destination square after you have selected a piece; then press the button a second time.
Atari Version
The Atari version of Laser Chess (Program 3) works only on Atari XL and XE models, since it uses a graphics mode available only on those computers. The game begins by asking whether you are using one or two joysticks.
To move a piece, move the cursor onto the piece, press the fire button, and then move to the destination square and press the button a second time. The cursor turns a darker color when a piece has been selected. To rotate a piece, move the cursor over the piece and press the button until the piece has rotated to the desired position. If you decide not to rotate the piece, keep pressing until the piece is not selected any more. This version of Laser Chess does not allow you to combine a rotation and a move in one action. To fire the laser, move the cursor to the laser and press the button; then press L. To quit the game, press System Reset; to quit the game and start a new game, press System Reset and enter RUN.
Apple II Version
The Apple version of Laser Chess runs on any Apple II computer, under either DOS 3.3 or ProDOS. This program is written in two parts. The first part (Program 4) is written in BASIC. The second part (Program 5) is written in machine language and must be entered with the "MLX" program published elsewhere in this issue. Note that you must save Program 5 with the filename LASER.ML because Program 4 attempts to load the file with that filename. Enter the Program 5 addresses as indicated here:
STARTING ADDRESS? 6000 ENDING ADDRESS? 6577
Make sure that both Program 4 and Program 5 are present on the same disk before you start the game. Run Program 4 to begin.
This version of Laser Chess relies on keyboard controls. Use the arrow keys to move the cursor. If you are using an Apple II+, use CTRL-J to move the cursor down and CTRL-K to move it up. Press RETURN to select and place pieces. Once a piece has been selected, you can rotate it by pressing the < or > keys. The menu in the upper left portion of the screen is used to fire the laser or exit the game. Press the ESC key to enter the menu; then move to the desired menu selection with cursor controls. Press RE-
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