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You start out at an altitude of 10,000 feet and begin falling at the rate of 16 feet/second^2. You may decide to coast down for a period of time or burn fuel for a period of time. If you coast, your velocity increases at the rate of 16 feet/second^2. If you burn fuel, you decelerate at the rate of 32 feet/second^2. You are to land by having your velocity below 2 feet/second and your altitude at 2 feet above the moon or less.
The problem is: you only have 20 seconds of fuel to burn, so use it wisely!
Note: If you think you are a professional, be sure to set flag 1 after initializing the game at step 2 by pressing f SF1.
Instructions:
1) Load the program into the calculator and change back to RUN mode.
2) Start the game by pressing A. The display will show 10000.000
2a) Set a starting speed and increase the difficulty, if desired, by
pressing f SF1, then enter your starting descent speed and press A
again.
3) If you decide to coast, enter the number of seconds and press C.
4) If you decide to burn your engines, enter the number of seconds and
press B.
5) After each action, the display will show your ALT.SPEED.
6) Repeat steps 3 and 4 until you land or crash.
7) A flashing display indicates either no fuel left or you have crashed
(altitude < -2 and speed too high!)
8) If the landing is successful, the display shifts to an integer
indicating your speed when you landed.
9) At any time, you may see how much fuel remains by pressing R/S. Then
to return to ALT.SPEED, press R/S again. (Don't keep pressing R/S,
however, as this will move you on into other parts of the program).
Line Instruction Keycode 01 DSP 21 02 . 83 03 3 03 04 RCL 6 34 06 05 g 35 06 PI 02 07 + 61 08 ENTER 41 09 * 71 10 f-1 32 11 INT 83 12 f-1 32 13 TF1 61 14 0 00 15 g NOP 35 01 16 STO 6 33 06 17 EEX 43 18 2 02 19 * 71 20 STO 2 33 02 21 2 02 22 0 00 23 / 81 24 g LSTx 35 00 25 + 61 26 STO 8 33 08 27 EEX 43 28 4 04 29 STO 1 33 01 30 LBL 23 31 1 01 32 RCL 1 34 01 33 f 31 34 INT 83 35 RCL 2 34 02 36 EEX 43 37 3 03 38 / 81 39 + 61 40 R/S 84 41 RCL 8 34 08 42 R/S 84 43 g RDN 35 08 44 RTN 24 45 LBL 23 46 B 12 47 STO 3 33 03 48 RCL 8 34 08 49 - 51 50 CHS 42 51 STO 8 33 08 52 0 00 53 g X > Y 35 24 54 / 81 55 g NOP 35 01 56 RCL 3 34 03 57 3 03 58 2 02 59 CHS 42 60 GTO 22 61 2 02 62 LBL 23 63 C 13 64 STO 3 33 03 65 1 01 66 6 06 67 LBL 23 68 2 02 69 * 71 70 RCL 2 34 02 71 + 61 72 STO 2 33 02 73 g LSTx 35 00 74 + 61 75 RCL 3 34 03 76 * 71 77 2 02 78 / 81 79 RCL 1 34 01 80 - 51 81 CHS 42 82 STO 1 33 01 83 2 02 84 CHS 42 85 g X > Y 35 24 86 0 00 87 / 81 88 CHS 42 89 g X < = Y 35 22 90 GTO 22 91 1 01 92 RCL 2 34 02 93 g X > Y 35 24 94 GTO 22 95 1 01 96 DSP 21 97 . 83 98 0 00 99 GTO 22 100 1 01