merlin
Here is my entry in the smallest-game contest. I wrote it several years
ago as a tiny TSR (383 bytes) and adapted it for the contest by removing
the TSR code. This brought it down to 217 bytes. I could squeeze a
few more bytes if I used 386-specific instructions but it is already
well under the 256-byte limit.
Enter this hex dump into Debug to create a COM file. Don't forget
to start at 100h.
000000: B8 03 00 CD 10 B5 20 B4 01 CD 10 BA 36 B8 8E C2
000010: 33 FF BB DA BF BA C2 03 EB 05 BB C3 B4 B2 C5 E8
000020: 93 00 E8 86 00 FE CE 75 F1 BB C0 D9 B2 C1 E8 84
000030: 00 1E 33 DB 8E DB A1 6C 04 1F B3 81 B1 09 D1 E8
000040: 88 3F 10 3F 43 E2 F7 BA 81 00 BF E2 06 B1 03 51
000050: B3 03 8B F2 B7 03 B8 20 70 8A 0C E3 01 98 B1 06
000060: F3 AB 46 47 47 FE CF 75 ED 81 EF CA 00 4B 75 E2
000070: 81 EF A0 00 8B D6 59 E2 D6 98 99 CD 16 3C 1B 75
000080: 06 B8 03 00 CD 10 C3 3C 0D 74 A6 2C 30 3C 09 77
000090: E8 8A D0 BB CF 01 D7 BB 81 00 B1 09 4A 74 04 D0
0000A0: E8 73 03 80 37 01 43 E2 F3 EB 9C BB B3 B3 B2 B3
0000B0: B8 B5 01 50 50 B4 0F 8A C3 AB B9 14 00 B0 C4 F3
0000C0: AB 26 88 55 F2 26 88 55 E4 8A C7 AB 83 C7 74 C3
0000D0: 0D 03 1A 21 5A 84 58 C0 B0
Merlin is played on a three by three board and the object of the game
is simple; all you need to do is clear the board. The numeric keypad
is used to toggle the squares. Here is the layout:
+---+---+---+
| 7 | 8 | 9 |
+---+---+---+
| 4 | 5 | 6 |
+---+---+---+
| 1 | 2 | 3 |
+---+---+---+
Pressing a key will toggle certain squares on or off. The idea is to
clear the whole board. Pressing the 1 key will toggle these squares:
+---+---+---+
| | | |
+---+---+---+
| X | X | |
+---+---+---+
| X | X | |
+---+---+---+
Likewise, any corner key toggles the four squares in the corner. Edge
keys (2,4,6,8) toggle the squares on the edge. Here is an example for 2.
+---+---+---+
| | | |
+---+---+---+
| | | |
+---+---+---+
| X | X | X |
+---+---+---+
The 5 key toggles the central squares:
+---+---+---+
| | X | |
+---+---+---+
| X | X | X |
+---+---+---+
| | X | |
+---+---+---+
That's all there is to it. You can scramble the board at any time by
pressing ENTER. Press ESCAPE to exit Merlin. Don't forget to set
NUMLOCK if you don't have a dedicated keypad.
-David Stafford (davids@cruzio.com)
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