Mercurial > vba-clojure

     1 (ns com.aurellem.exp.assembly

     2    (:use (com.aurellem.gb gb-driver vbm title items))

     3    (:import [com.aurellem.gb.gb_driver SaveState]))

     4 

     5 

     6 (defn run-item-program

     7   "This is my first assembly/item program!

     8    it just increments BC by one.

     9 

    10    The code places a 3 'great balls' at the beginning of the

    11    inventory, then directly sets the program counter to start

    12    executing at the position of the 'great balls' in memory.

    13 

    14    Since a 'great ball' is represented in memory as 0x03, which

    15    corresponts to the opcode which increments BC by one, that is

    16    what happens. Then the program counter to the 0x03 quantity entry

    17    and BC is incremented again.

    18 

    19    Obviously, the game crashes more or less immediately after the

    20    program counter advances past the 'great balls' into the next items

    21    in the inventory, thus I call shutdown! before anything bad happens."

    22   []

    23   (set-inventory (read-state "mid-game") [[:great-ball 3]])

    24   (print-inventory)

    25   (println "3 ticks") (tick) (tick) (tick)

    26   (println "PC before:" (PC))

    27   (println "BC before:" (BC))

    28   (PC! (inc item-list-start))

    29   (println "PC after setting:" (PC))

    30   (println "data at PC:" (aget (memory) (PC)))

    31   (println "one tick")

    32   (tick)

    33   (println "PC after one tick:" (PC))

    34   (println "BC after one tick:" (BC))

    35   (tick)

    36   (println "PC after two ticks:" (PC))

    37   (println "BC after two ticks:" (BC))

    38 

    39   (shutdown!))

    40 

    41 

    42 

    43 

    44 (defn test-opcodes-1

    45   []

    46   (let [final-state

    47         (->

    48          (read-state "mid-game")

    49          (set-inv-mem 

    50           [20 0x02 0x00 0x00 0x02 0x00 0x00

    51            0x00 0x0 0xFF])

    52          (print-inventory)

    53          ;;((fn [_] (println "3 ticks") _))

    54          (tick) (tick) (tick)

    55          

    56          ;;(println "PC before:" (PC))

    57          ;;(println "BC before:" (BC))

    58          ;;(println "AF:" (AF))

    59          (PC! (inc item-list-start))

    60          (BC! (+ 1 item-list-start))

    61          ;;(println "PC after setting:" (PC))

    62          ;;(println "data at PC:" (aget (memory) (PC)))

    63          ;;(println "data at " (BC) "(BC):" (aget (memory) (BC)))

    64          

    65          ;;(println "one tick")

    66          (tick)

    67          ;;(println "PC after one tick:" (PC))

    68          ;;(println "BC after one tick:" (BC))

    69          ;;(println "data at PC:" (aget (memory) (PC)))

    70          ;;(println "data at " (BC) "(BC):" (aget (memory) (BC)))

    71          (tick)

    72          (AF! 0xFFFF)

    73          ;;(println "PC after two ticks:" (PC))

    74          ;;(println "BC after two ticks:" (BC))

    75          ;;(println "data at PC:" (aget (memory) (PC)))

    76          ;;(println "data at " (BC) "(BC):" (aget (memory) (BC)))

    77          (tick)

    78          ;;(println "PC after three ticks:" (PC))

    79          ;;(println "BC after three ticks:" (BC))

    80          ;;(println "data at PC:" (aget (memory) (PC)))

    81          ;;(println "data at " (BC) "(BC):" (aget (memory) (BC)))

    82          (tick)

    83          ;;(println "PC after four ticks:" (PC))

    84          ;;(println "BC after four ticks:" (BC))

    85          ;;(println "data at PC:" (aget (memory) (PC)))

    86          ;;(println "data at " (BC) "(BC):" (aget (memory) (BC)))

    87          (tick)

    88          ;;(println "PC after five ticks:" (PC))

    89          ;;(println "BC after five ticks:" (BC))

    90          ;;(println "data at PC:" (aget (memory) (PC)))

    91          ;;(println "data at " (BC) "(BC):" (aget (memory) (BC)))

    92          (print-inventory)

    93          )]

    94     

    95     (shutdown!)

    96     final-state))

    97 

    98 

    99 

   100 (defn test-opcodes-2

   101   []

   102   (set-inv-mem (read-state "mid-game")

   103                [20 0x08 0x1D 0xD3 0x00 0x00 0x00

   104                 0x00 0x0 0xFF])

   105   (print-inventory)

   106   (println "3 ticks") (tick) (tick) (tick)

   107   (println "PC before:" (PC))

   108   (println "SP:" (SP))

   109   (PC! (inc item-list-start))

   110   (println "PC after setting:" (PC))

   111   (println "SP:" (Integer/toBinaryString (SP)))

   112   (println "data at PC:" (aget (memory) (PC)))

   113   (println "data at 0xD31D:" (Integer/toBinaryString (aget (memory) 0xD31D)))

   114   (println "data at 0xD31E:" (Integer/toBinaryString (aget (memory) 0xD31E)))

   115   (println "one tick")

   116   (tick)

   117   (println "PC after one tick:" (PC))

   118   (println "data at PC:" (aget (memory) (PC)))

   119   (println "data at 0xD31D:" (Integer/toBinaryString (aget (memory) 0xD31D)))

   120   (println "data at 0xD31E:" (Integer/toBinaryString (aget (memory) 0xD31E)))

   121   (tick) (tick) (tick)

   122   (println "PC aftter four tick:" (PC))

   123   (println "data at PC:" (aget (memory) (PC)))

   124   (println "data at 0xD31D:" (aget (memory) 0xD31D))

   125   

   126   (print-inventory)

   127   (shutdown!))

   128
author	Robert McIntyre <rlm@mit.edu>
date	Sat, 31 Mar 2012 00:05:39 -0500
parents	412ca096a9ba
children