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annotate clojure/com/aurellem/gb_driver.clj @ 96:cb487c4ce5c0

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added write-memory!, which allows me to write any value to the gameboy's memory-mapped rom or ram.
author Robert McIntyre <rlm@mit.edu>
date Sun, 11 Mar 2012 23:27:19 -0500
parents b74a578d0c88
children 9fad96094950
rev   line source
rlm@60 1 (ns com.aurellem.gb-driver
rlm@87 2 (:import com.aurellem.gb.Gb)
rlm@87 3 (:import java.io.File)
rlm@87 4 (:import org.apache.commons.io.FileUtils)
rlm@87 5 (:import (java.nio IntBuffer ByteOrder)))
rlm@48 6
rlm@87 7 ;; Savestates
rlm@87 8 (defrecord SaveState [frame data])
rlm@76 9
rlm@76 10 (def ^:dynamic *save-state-cache*
rlm@76 11 (File. "/home/r/proj/pokemon-escape/save-states/"))
rlm@76 12
rlm@87 13 (defn frame->filename [frame]
rlm@87 14 (File. *save-state-cache* (format "%07d.sav" frame)))
rlm@87 15
rlm@88 16 (defn write-state! [^SaveState save]
rlm@87 17 (let [buf (:data save)
rlm@87 18 bytes (byte-array (.limit buf))
rlm@87 19 dest (frame->filename (:frame save))]
rlm@87 20 (.get buf bytes)
rlm@87 21 (FileUtils/writeByteArrayToFile dest bytes)
rlm@87 22 (.rewind buf)
rlm@88 23 dest))
rlm@87 24
rlm@88 25 (defn read-state [frame]
rlm@87 26 (let [save (frame->filename frame)]
rlm@87 27 (if (.exists save)
rlm@87 28 (let [buf (Gb/saveBuffer)
rlm@87 29 bytes (FileUtils/readFileToByteArray save)]
rlm@87 30 (.put buf bytes)
rlm@87 31 (.flip buf)
rlm@87 32 (SaveState. frame buf)))))
rlm@87 33 ;;;;;;;;;;;;;;;;
rlm@87 34
rlm@87 35 ;; Gameboy management
rlm@87 36 (Gb/loadVBA)
rlm@87 37
rlm@65 38 (def yellow-rom-image
rlm@65 39 (File. "/home/r/proj/pokemon-escape/roms/yellow.gbc"))
rlm@65 40
rlm@67 41 (def yellow-save-file
rlm@67 42 (File. "/home/r/proj/pokemon-escape/roms/yellow.sav"))
rlm@67 43
rlm@87 44 (def on? (atom nil))
rlm@73 45
rlm@87 46 (defn shutdown! [] (Gb/shutdown) (reset! on? false))
rlm@87 47
rlm@87 48 (defn restart! []
rlm@87 49 (shutdown!)
rlm@67 50 (.delete yellow-save-file)
rlm@87 51 (Gb/startEmulator (.getCanonicalPath yellow-rom-image))
rlm@87 52 (reset! on? true))
rlm@60 53
rlm@87 54 ;;; The first state!
rlm@87 55 (defn gen-root! []
rlm@87 56 (restart!)
rlm@88 57 (let [state (SaveState. 0 (Gb/saveState))]
rlm@88 58 (write-state! state)
rlm@88 59 state))
rlm@71 60
rlm@87 61 (defn root []
rlm@87 62 (if (.exists (frame->filename 0))
rlm@88 63 (read-state 0)
rlm@87 64 (gen-root!)))
rlm@87 65
rlm@87 66 ;;;; Press Buttons
rlm@87 67
rlm@87 68 (def button-code
rlm@87 69 {;; main buttons
rlm@87 70 :a 0x0001
rlm@87 71 :b 0x0002
rlm@87 72
rlm@87 73 ;; directional pad
rlm@87 74 :r 0x0010
rlm@87 75 :l 0x0020
rlm@87 76 :u 0x0040
rlm@87 77 :d 0x0080
rlm@87 78
rlm@87 79 ;; meta buttons
rlm@87 80 :select 0x0004
rlm@87 81 :start 0x0008
rlm@87 82
rlm@87 83 ;; pseudo-buttons
rlm@87 84 :restart 0x0800 ; hard reset
rlm@87 85 :listen -1 ; listen for user input
rlm@87 86 })
rlm@87 87
rlm@87 88 (defn button-mask [buttons]
rlm@87 89 (reduce bit-or 0x0000 (map button-code buttons)))
rlm@87 90
rlm@87 91 (def current-state (atom nil))
rlm@87 92
rlm@87 93 (defn set-state! [^SaveState state]
rlm@87 94 (assert (:data state) "Not a valid state!")
rlm@87 95 (if (not @on?) (restart!))
rlm@87 96 (if (not= @current-state state)
rlm@87 97 (Gb/loadState (:data state)))
rlm@87 98 (reset! current-state state))
rlm@87 99
rlm@87 100 (defrecord Move [keys state])
rlm@87 101
rlm@87 102 (defn step
rlm@87 103 ([^SaveState state buttons]
rlm@87 104 (set-state! state)
rlm@87 105 (Gb/step (button-mask buttons))
rlm@87 106 (reset! current-state
rlm@87 107 (SaveState. (inc (:frame state))(Gb/saveState))))
rlm@87 108 ([^SaveState state]
rlm@87 109 (step state [:listen]))
rlm@87 110 ([] (step (if @current-state @current-state (root)))))
rlm@87 111
rlm@87 112 (defn move
rlm@87 113 [^Move move buttons]
rlm@87 114 (Move. (step (:state move) buttons) buttons))
rlm@87 115
rlm@87 116 (defn play
rlm@87 117 ([^SaveState state n]
rlm@87 118 (reduce (fn [s _] (step s)) state (range n)))
rlm@87 119 ([n]
rlm@87 120 (play @current-state n)))
rlm@87 121
rlm@87 122 (defn play-moves
rlm@87 123 ([moves [prev state]]
rlm@87 124 (set-state! state)
rlm@87 125 (dorun (map (fn [move] (step @current-state move)) moves))
rlm@87 126 [(concat prev moves) @current-state]))
rlm@87 127
rlm@87 128 ;;;;;;;;;;;
rlm@87 129
rlm@87 130
rlm@87 131 ;;;;;;;;;;;;;;; CPU data
rlm@87 132
rlm@64 133 (defn cpu-data [size arr-fn]
rlm@64 134 (let [store (int-array size)]
rlm@94 135 (fn get-data
rlm@94 136 ([] (get-data @current-state))
rlm@94 137 ([state]
rlm@94 138 (set-state! state) (arr-fn store) store))))
rlm@60 139
rlm@93 140 (def memory
rlm@94 141 (cpu-data Gb/GB_MEMORY #(Gb/getMemory %)))
rlm@93 142
rlm@64 143 (def ram
rlm@93 144 (cpu-data Gb/RAM_SIZE #(Gb/getRAM %)))
rlm@61 145
rlm@64 146 (def rom
rlm@93 147 (cpu-data Gb/ROM_SIZE #(Gb/getROM %)))
rlm@61 148
rlm@64 149 (def working-ram
rlm@64 150 (cpu-data Gb/WRAM_SIZE #(Gb/getWRAM %)))
rlm@62 151
rlm@64 152 (def video-ram
rlm@64 153 (cpu-data Gb/VRAM_SIZE #(Gb/getVRAM %)))
rlm@64 154
rlm@64 155 (def registers
rlm@64 156 (cpu-data Gb/NUM_REGISTERS #(Gb/getRegisters %)))
rlm@64 157
rlm@96 158
rlm@96 159 (defn write-memory! [new-memory]
rlm@96 160 (let [store (int-array new-memory)]
rlm@96 161 (assert (= Gb/GB_MEMORY) (count new-memory))
rlm@96 162 (Gb/writeMemory new-memory)))
rlm@96 163
rlm@96 164
rlm@87 165 ;; TODO add register names
rlm@71 166
rlm@87 167 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
rlm@71 168
rlm@87 169 (defn AF [state]
rlm@87 170 (nth (registers state) 2))
rlm@71 171
rlm@87 172 (defn BC [state]
rlm@87 173 (nth (registers state) 3))
rlm@71 174
rlm@87 175 (defn DE [state]
rlm@87 176 (nth (registers state) 4))
rlm@87 177
rlm@87 178 ;;;;;;;;;;;;;;;
rlm@71 179
rlm@87 180 (defmacro defn-memo
rlm@87 181 [& forms]
rlm@87 182 (let [fun-name (first forms)]
rlm@87 183 `(do
rlm@87 184 (defn ~@forms)
rlm@87 185 (alter-var-root (var ~fun-name) memoize))))
rlm@95 186