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1 (ns com.aurellem.exp.item-bridge
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2 (:use (com.aurellem.gb util constants gb-driver vbm items assembly))
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3 (:use (com.aurellem.run title save-corruption))
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4 (:use (com.aurellem.exp pokemon))
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5 (:import [com.aurellem.gb.gb_driver SaveState]))
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6
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7 (defn corrupt-item-state []
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8 (second (destroy-item-end-of-list-marker)))
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9
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10 (defn corrupt-item-state []
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11 (read-state "corrupt-items"))
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12
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13 (defn view-memory-range [state start end]
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14 (dorun
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15 (map (fn [loc val]
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16 (println (format "%04X : %02X" loc val)))
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17 (range start end) (subvec (vec (memory state)) start end)))
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18 state)
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19
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20 (defn almost-broken
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21 "if one more memory location is turned into 0x03, the game crashes."
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22 [n]
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23 (view-memory-range
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24 (set-inv-mem (mid-game)
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25 (concat [0xFF] (repeat 64 0x03)
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26 (subvec (vec (memory (mid-game)))
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27 (+ item-list-start 65)
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28 (+ item-list-start 65 n))
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29 (repeat (- 255 65 n) 0x03)))
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30 item-list-start (+ item-list-start 255)))
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31
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32 (defn actually-broken
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33 "if this memory location is turned into 0x03, the game crashes."
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34 []
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35 (set-memory (mid-game) 0xD35D 0x03))
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36
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37
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38 ;; (almost-broken 20) more or less works
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39
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40 (defn capture-program-counter
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41 "records the program counter for each tick"
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42 [^SaveState state ticks]
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43 (let [i (atom 0)]
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44 (reduce (fn [[program-counters state] _]
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45 (println (swap! i inc))
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46 [(conj program-counters (PC state))
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47 (tick state)])
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48 [[] state]
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49 (range ticks))))
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50
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51
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52 (defn capture-program-counter
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53 [^SaveState state ticks]
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54 (set-state! state)
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55 (loop [i 0
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56 pcs []]
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57 (if (= i ticks)
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58 pcs
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59 (do
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60 (com.aurellem.gb.Gb/tick)
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61 (recur (inc i)
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62 (conj pcs (first (registers))))))))
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63
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64 (defn loop-program []
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65 [0xF3 ;0xD31D ;; disable-interrupts
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66
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67 0xC3 ;; loop forever
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68 0x1D
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69 0xD3])
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70
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71 (def map-function-address-start 0xD36D)
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72
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73 (defn test-loop []
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74 (capture-program-counter
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75 (-> (mid-game)
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76 (set-memory-range 0xD31D (loop-program))
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77 (set-memory-range
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78 map-function-address-start
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79 [0xD3 0x1D])
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80 (IE! 0))
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81 1000))
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82
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83
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84 (defn-memo corrupt-moves []
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85 (concat
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86 (first
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87 (->>
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88 [[] (mid-game)]
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89 (advance [:b] [:b :start])
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90 (advance [] [:d])
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91 (play-moves [[] [] [] [:d] [] [] [] [:d] [] [] [:a]])
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92 scroll-text
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93 (play-moves
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94 ;; this section is copied from speedrun-2942
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95 ;; and corrupts the save so that the end-of-list marker
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96 ;; for the pokemon roster is destroyed, but the save is still
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97 ;; playable.
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98 [[] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] [] []
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99 [] [] [] [] [] [] [] [] [] [] [:select] [:restart]])
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100 (play-moves
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101 (first (title)))
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102 (advance [] [:start])
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103 (advance [] [:a])
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104 (advance [:a] [:a :start])))
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105 [[]]))
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106
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107
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108
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109 (defn corrupt
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110 "enter the codes to destroy the
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111 pokemon list using save corruption"
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112 ([^SaveState state]
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113 (run-moves
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114 state
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115 (corrupt-moves)))
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116 ([] (corrupt @current-state)))
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117
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118 (defn mid-game-corrupt []
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119 (read-state "corrupt-mid-game"))
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120
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121
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122
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123
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124
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125
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