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The game of NIMB is an old calculator game. You start with 15 sticks in a pile and take turns removing 1, 2, or 3 sticks. The object is to leave the pile with only 1 stick remaining to make your opponent take the last stick.
Instructions:
0) Key the program in. Switch to RUN mode.
1) Store these constants: 55178 STO 1 (This is "BLISS" when viewed upside down), 3507.1 STO 2 (I.LOSE upside down).
2) Press the BST key and press R/S. 15 will be displayed (this is the number of sticks on the pile).
3) A positive display means that it is your turn. Remove either 1, 2, or 3 sticks from the pile (by entering 1, 2 or 3) and pressing R/S.
4) A negative number will be shown indicating the number left on the pile and that it is the HP-55's turn. Press R/S to give the machine a turn.
5) Continue with steps 3 and 4 until either BLISS or I.LOSE is displayed upside down. For a new game, goto step 2.
Line Instruction Keycode 01 FIX 24 02 0 00 03 1 01 04 5 05 05 R/S 84 06 - 51 07 1 01 08 X <> Y 22 09 g 32 10 X = Y -45 11 CHS 42 12 R/S 84 13 CHS 42 14 1 01 15 - 51 16 3 03 17 X <> Y 22 18 f 31 19 X < = Y -41 20 6 06 21 g 32 22 X = Y -14 23 CLX 44 24 7 07 25 g 32 26 X = Y -39 27 CLX 44 28 1 01 29 0 00 30 g 32 31 X = Y -14 32 CLX 44 33 1 01 34 1 01 35 g 32 36 X = Y -39 37 RDN 23 38 GTO 05 -05 39 2 02 40 - 51 41 GTO 05 -05 42 RCL 34 43 1 01 44 GTO 00 00 45 FIX 24 46 1 01 47 RCL 34 48 2 02 49 GTO 00 00