Mercurial > vba-clojure

     1 (ns com.aurellem.gb.assembly

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

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

     4 

     5 (defn inject-assembly

     6   ([^SaveState state

     7    program-counter registers

     8    assembly-code]

     9   (let [scratch-memory (memory state)]

    10     ;; inject assembly code

    11     (dorun (map (fn [index val]

    12                   (aset scratch-memory index val))

    13                 (range program-counter

    14                        (+ program-counter (count assembly-code)))

    15                 assembly-code))

    16     (-> state

    17         (write-memory! scratch-memory)

    18         (write-registers! registers)

    19         (PC! program-counter)))))

    20 

    21 (defn inject-item-assembly

    22   ([^SaveState state assembly-code]

    23      (inject-assembly state (inc item-list-start)

    24                       (registers state)

    25                       assembly-code))

    26   ([assembly-code]

    27      (inject-item-assembly @current-state assembly-code)))

    28 

    29 (defn run-assembly

    30   ([info-fn assembly n]

    31      (let [final-state

    32            (reduce (fn [state _]

    33                      (tick (info-fn state)))

    34                    (inject-item-assembly

    35                      (mid-game) assembly)

    36                    (range n))]

    37        final-state))

    38   ([assembly n]

    39      (run-assembly d-tick assembly n)))

    40 

    41 (def buttons-port 0xFF00)

    42 

    43 (defn trace [state]

    44   (loop [program-counters [(first (registers @current-state)) ]

    45          opcodes [(aget (memory @current-state) (PC @current-state))]]

    46     (let [frame-boundary?

    47           (com.aurellem.gb.Gb/tick)]

    48       (if frame-boundary?

    49         [program-counters opcodes]

    50         (recur

    51          (conj program-counters

    52                (first (registers @current-state)))

    53          (conj opcodes

    54                (aget (memory @current-state)

    55                      (PC @current-state))))))))

    56 

    57 (defn print-trace [state n]

    58   (let [[program-counters opcodes] (trace state)]

    59     (dorun (map (fn [pc op] (println (format "%04X: 0x%02X" pc op)))

    60                 (take n program-counters)

    61                 (take n opcodes)))))

    62 

    63 (defn good-trace []

    64   (-> (mid-game) (tick) (IE! 0)

    65       (set-inv-mem [0x00 0x00 0X00 0x00])

    66       (PC! item-list-start)(print-interrupt)

    67       (d-tick) (tick) (d-tick) (tick) (d-tick)))

    68 

    69 (defn read-down-button []

    70   (-> (tick (mid-game))

    71       (IE! 0) ; disable interrupts

    72       (inject-item-assembly

    73        ;; write 00010000 to 0xFF00 to select joypad

    74        [0x18   ;D31D                    ; jump over          

    75         0x01   ;D31E                    ; the next 8 bits

    76                                         ;D31F

    77         (Integer/parseInt "00100000" 2) ; data section 

    78         

    79         0xFA   ;D320                    ; load (D31F) into A

    80         0x1F   ;D321      -->       

    81         0xD3   ;D322      -->  D31F     

    82 

    83         0xEA   ;D323                    ; load (A), which is 

    84         0x00   ;D324      -->           ; 00010000, into FF00

    85         0xFF   ;D325      -->  FF00     

    86         

    87         0x18   ;D326                    ; this is the place where

    88         0x01   ;D327                    ; we will store whether

    89         0x00   ;D328                    ; "down" is pressed.

    90 

    91         0xFA   ;D329                    ; (FF00) -> A

    92         0x00   ;D32A                   

    93         0xFF   ;D32B

    94 

    95         0xCB   ;D32C                    ; Test whether "down"

    96         0x5F   ;D32D                    ; is pressed.

    97 

    98         0x28   ;D32E                    ; if down is pressed,

    99         0x03   ;D32F                    ; skip the next section 

   100                                         ; of code.

   101         ;; down-is-not-pressed

   102         0xC3   ;D330

   103         0x1D   ;D331                    ; return to beginning

   104         0xD3   ;D332

   105         

   106         ;; down-is-pressed 

   107         0xEA   ;D334                    ; write A to D328 if 

   108         0x28   ;D335                    ; "down" was pressed

   109         0xD3   ;D336

   110 

   111         0xC3   ;D330

   112         0x1D   ;D331                    ; return to beginning

   113         0xD3   ;D332

   114         ])))

   115 

   116 (defn test-read-down []

   117  (= (view-memory (step (step (read-down-button) [:d])) 0xD328)

   118     (view-memory (step (step (read-down-button))) 0xD328)))

   119 

   120 (defn count-frames []

   121   (-> (tick (mid-game))

   122       (IE! 0) ; disable interrupts

   123       (inject-item-assembly

   124        [0x18   ;D31D                    ; jump over          

   125         0x02   ;D31E                    ; the next 2 bytes

   126         0x00   ;D31F                    ; frame-count

   127         0x00   ;D320                    ; v-blank-prev

   128         

   129         0xFA   ;D321

   130         0x41   ;D322                    ; load (FF41) into A

   131         0xFF   ;D323                    ; this contains mode flags

   132         

   133         ;; if we're in v-blank, the bit-1 is 0

   134         ;; and bit-2 is 1  Otherwise, it is not v-blank.

   135         0xCB   ;D324                     ; test bit-1 of A

   136         0x4F   ;D325                         

   137 

   138         0xC2   ;D326                     ; if bit-1 is not 0

   139         0x44   ;D327                     ; GOTO not-v-blank

   140         0xD3   ;D328

   141         

   142         0xCB   ;D329                     ; test bit-0 of A 

   143         0x47   ;D32A

   144 

   145         0xCA   ;D32B                     ; if bit-0 is not 1

   146         0x44   ;D32C                     ; GOTO not-v-blank

   147         0xD3   ;D32D

   148         ;;; in v-blank mode

   149            ;; if v-blank-prev was 0,

   150            ;; increment frame-count

   151 

   152         0xFA   ;D32E                    ; load v-blank-prev to A

   153         0x20   ;D32F

   154         0xD3   ;D330

   155         

   156         0xCB   ;D331

   157         0x47   ;D332                    ; test bit-0 of A 

   158 

   159         0x20   ;D333                    ; skip next section

   160         0x07   ;D334                    ; if v-blank-prev was not zero 

   161         

   162            ;; v-blank was 0, increment frame-count

   163         0xFA   ;D335                    ; load frame-count into A

   164         0x1F   ;D336

   165         0xD3   ;D337                   

   166 

   167         0x3C   ;D338                    ; inc A

   168 

   169         0xEA   ;D339                    ; load A into frame-count

   170         0x1F   ;D33A

   171         0xD3   ;D33B

   172 

   173            ;; set v-blank-prev to 1

   174         0x3E   ;D33C                    ; load 1 into A

   175         0x01   ;D33D                    

   176 

   177         0xEA   ;D33E                    ; load A into v-blank-prev

   178         0x20   ;D33F

   179         0xD3   ;D340

   180 

   181         0xC3   ;D341                   ; return to beginning

   182         0x1D   ;D342

   183         0xD3   ;D343

   184 

   185         ;;; not in v-blank mode

   186            ;; set v-blank-prev to 0

   187         0x3E   ;D344                    ; load 0 into A        

   188         0x00   ;D345

   189 

   190         0xEA   ;D346                    ; load A into v-blank-prev

   191         0x20   ;D347

   192         0xD3   ;D348

   193 

   194         0xC3   ;D349                   ; return to beginning

   195         0x1D   ;D34A

   196         0xD3   ;D34B

   197         ])))

   198 

   199 (defn step-count-frames []

   200   (-> (read-down-button)

   201       (d-tick)

   202       (tick)  ;; skip over data section

   203       (d-tick)  

   204       (view-register "Register A" A)

   205       (tick)  ;; load-data into A

   206       (view-register "Register A" A)

   207       (d-tick)

   208       (view-memory 0xFF00)

   209       (tick) ;; load A into 0xFF00

   210       (view-memory 0xFF00)

   211       (d-tick)

   212       (tick)

   213       (d-tick)

   214       (tick)

   215       (d-tick)

   216       (tick)

   217       (d-tick)

   218       (tick)

   219       (d-tick)

   220       (tick)

   221       (d-tick)

   222       (tick)

   223       (print-inventory)))

   224 

   225 (defn test-count-frames []

   226   (= 255 (aget (memory ((apply comp (repeat 255 step))

   227                         (count-frames)))

   228                0xD31F)))

   229 

   230 ;; specs for main bootstrap program

   231 ;; starts in "mode-select" mode

   232 ;;   Each button press takes place in a single frame.

   233 ;;   mode-select-mode takes one of the main buttons

   234 ;;   which selects one of up to eight modes

   235 ;;   mode 1 activated by the "A" button

   236 ;;   the next two button presses indicates the start

   237 ;;   memory location which to which the bootstrap

   238 ;;   program will write.

   239 ;;   This is done by using each of the eight buttons to

   240 ;;   spell out an 8 bit number.  The order of buttons is

   241 ;;   [:d :u :l :r :start :select :b :a]

   242 ;;   [:a :start :l]  -->  00101001

   243 

   244 ;;   the next button press determines how many bytes are to be

   245 ;;   written, starting at the start position.

   246 

   247 ;;   then, the actual bytes are entered and are written to the

   248 ;;   start address in sequence.

   249 

   250 (defn input-number-assembly []

   251   [0x18   ;D31D                    ; jump over          

   252    0x02   ;D31E                    ; the next 2 bytes

   253    0x00   ;D31F                    ; frame-count

   254    0x00   ;D320                    ; v-blank-prev

   255    

   256    0xFA   ;D321

   257    0x41   ;D322                    ; load (FF41) into A

   258    0xFF   ;D323                    ; this contains mode flags

   259    

   260    ;; if we're in v-blank, the bit-1 is 0

   261    ;; and bit-2 is 1  Otherwise, it is not v-blank.

   262    0xCB   ;D324                     ; test bit-1 of A

   263    0x4F   ;D325                         

   264 

   265    0xC2   ;D326                     ; if bit-1 is not 0

   266    0x44   ;D327                     ; GOTO not-v-blank

   267    0xD3   ;D328

   268    

   269    0xCB   ;D329                     ; test bit-0 of A 

   270    0x47   ;D32A

   271 

   272    0xCA   ;D32B                     ; if bit-0 is not 1

   273    0x44   ;D32C                     ; GOTO not-v-blank

   274    0xD3   ;D32D

   275    

   276         ;;; in v-blank mode

   277 

   278    ;; if v-blank-prev was 0,

   279    ;; increment frame-count

   280 

   281    0xFA   ;D32E                    ; load v-blank-prev to A

   282    0x20   ;D32F

   283    0xD3   ;D330

   284    

   285    0xCB   ;D331

   286    0x47   ;D332                    ; test bit-0 of A 

   287 

   288    0x20   ;D333                    ; skip next section

   289    0x07   ;D334                    ; if v-blank-prev was not zero 

   290    

   291    ;; v-blank was 0, increment frame-count

   292    0xFA   ;D335                    ; load frame-count into A

   293    0x1F   ;D336

   294    0xD3   ;D337                   

   295 

   296    0x3C   ;D338                    ; inc A

   297 

   298    0xEA   ;D339                    ; load A into frame-count

   299    0x1F   ;D33A

   300    0xD3   ;D33B

   301 

   302    ;; set v-blank-prev to 1

   303    0x3E   ;D33C                    ; load 1 into A

   304    0x01   ;D33D                    

   305 

   306    0xEA   ;D33E                    ; load A into v-blank-prev

   307    0x20   ;D33F

   308    0xD3   ;D340

   309 

   310    0xC3   ;D341                   ; GOTO input handling code

   311    0x4E   ;D342

   312    0xD3   ;D343

   313 

   314         ;;; not in v-blank mode

   315    ;; set v-blank-prev to 0

   316    0x3E   ;D344                    ; load 0 into A        

   317    0x00   ;D345

   318 

   319    0xEA   ;D346                    ; load A into v-blank-prev

   320    0x20   ;D347

   321    0xD3   ;D348

   322 

   323    0xC3   ;D349                   ; return to beginning

   324    0x1D   ;D34A

   325    0xD3   ;D34B

   326 

   327    0x00   ;D34C                   ; these are here 

   328    0x00   ;D34D                   ; for glue

   329    

   330    

   331         ;;; calculate input number based on button presses

   332    0x18   ;D34E                    ;  skip next 3 bytes

   333    0x03   ;D34F

   334                                         ;D350

   335    (Integer/parseInt "00100000" 2) ;  select directional pad

   336                                         ;D351

   337    (Integer/parseInt "00010000" 2) ;  select buttons

   338    0x00   ;D352                    ;  input-number

   339 

   340    ;; select directional pad, store low bits in B

   341    

   342    0xFA   ;D353                    ; load (D350) into A

   343    0x50   ;D354      -->       

   344    0xD3   ;D355      -->  D31F     

   345    

   346    0xEA   ;D356                    ; load A, which is 

   347    0x00   ;D357      -->           ; 00010000, into FF00

   348    0xFF   ;D358      -->  FF00     

   349 

   350    0x06   ;D359

   351                                         ;D35A

   352    (Integer/parseInt "11110000" 2) ; "11110000" -> B 

   353    0xFA   ;D35B                    ; (FF00) -> A

   354    0x00   ;D35C                   

   355    0xFF   ;D35D

   356 

   357    0xCB   ;D35E                    ; swap nybbles on A

   358    0x37   ;D35F

   359    0xA0   ;D360                    ; (AND A B) -> A

   360    0x47   ;D361                    ; A -> B

   361 

   362    ;; select buttons store bottom bits in C

   363    

   364    0xFA   ;                        ; load (D351) into A

   365    0x51   ;          -->       

   366    0xD3   ;          -->  D31F     

   367    

   368    0xEA   ;                        ; load (A), which is 

   369    0x00   ;          -->           ; 00001000, into FF00

   370    0xFF   ;          -->  FF00     

   371 

   372    0x0E   ;    

   373    (Integer/parseInt "00001111" 2) ; "00001111" -> C 

   374 

   375    0xFA   ;                        ; (FF00) -> A

   376    0x00   ;                       

   377    0xFF   ;    

   378    

   379    0xA1   ;                        ; (AND A C) -> A

   380    0x4F   ;                        ; A -> C

   381 

   382    ;; combine the B and C registers into the input number

   383    0x79   ;                        ; C -> A

   384    0xB0   ;                        ; (OR A B) -> A

   385    0x2F   ;                        ; negate A

   386 

   387    0xEA   ;                        ; store A into input-number

   388    0x52   ;

   389    0xD3   ;

   390 

   391    0xC3   ;                        ; return to beginning

   392    0x1D   ;    

   393    0xD3   ;    

   394    ])

   395 

   396 

   397 

   398 (defn input-number []

   399   (-> (tick (mid-game))

   400       (IE! 0) ; disable interrupts

   401       (inject-item-assembly (input-number-assembly))))

   402   

   403 (defn test-input-number

   404   "Input freestyle buttons and observe the effects at the repl."

   405   []

   406   (set-state! (input-number)) 

   407   (dotimes [_ 90000] (step (view-memory @current-state 0xD352))))

   408 

   409 

   410 

   411 

   412 

   413 

   414 (defn write-memory-assembly*

   415   "A program for altering in-game memory by pressing buttons."

   416   []

   417   [

   418    ;; 0xF3 ; stop interrupts

   419    ;; --------- CLEANUP

   420    0xAF ; zero A  [D31E]

   421    0x57 ; A->D; makes D=0.

   422    

   423    ;; --------- FRAME METRONOME

   424    0xF1 ;; pop AF (vblank prev) [D320]

   425 

   426    0x2F ;; invert A

   427    0x4F ;; A -> C

   428    

   429    0xF0 ;; copy STAT into A

   430    0x41

   431 

   432    0x47 ;; A->B

   433    0x1F ;; rotate A right

   434    0x2F ;; complement A

   435    0xA0 ;; A & B --> A

   436    

   437    0xF5 ;; push AF (vbprev)

   438    

   439    0xA1 ;; A & C --> A. Now A_0 contains "increment?"

   440 

   441    0x4F

   442    0xCB ;; test bit 0 of C. sadly, this result can't be reused below. 

   443    0x41

   444    

   445    0x28 ;; end frame (JUMP) if A_0 = 0.  

   446    0xF3 ;; TODO: set jump length

   447    

   448    ;; -------- GET BUTTON INPUT

   449    

   450         ;; prepare to select bits

   451  

   452    0x3E ;; load 0x20 into A, to measure dpad

   453    0x20

   454    

   455    0x06 ;; load 0x00 into B

   456    0x00 ;; to initialize for "OR" loop

   457 

   458    0xE0 ;; load A into [FF00] ;; start of OR loop [D33C]

   459    0x00

   460    

   461    0xF0 ;; load A from [FF00]

   462    0x00

   463 

   464    0xE6 ;; bitmask 00001111

   465    0x0F

   466    

   467    0xB0 ;; A or B --> A

   468 

   469    0xCB ;; check bit 0 of C

   470    0x41

   471    

   472    0x28 ;; JUMP forward if Z=0

   473    0x08

   474 

   475    0x47 ;; A -> B

   476    0xCB ;; swap B nybbles

   477    0x30 

   478    

   479    0x3E ;; load 0x10 into A, to measure btns

   480    0x10

   481    

   482    0x18 ;; JUMP back to "load A into [FF00]"

   483    0xF0

   484 

   485 

   486    ;; ------ TAKE ACTION BASED ON USER INPUT

   487 

   488    ;; "input mode"

   489    ;; mode 0x00 : select mode

   490    ;; mode 0x08 : select bytes-to-write

   491    ;; mode 0x10 : select hi-bit

   492    ;; mode 0x18 : select lo-bit

   493 

   494    ;; "output mode"

   495    ;; mode 0x20 : write bytes

   496    ;; mode 0xFF : jump PC

   497 

   498 

   499    ;; registers

   500    ;; D : mode select

   501    ;; E : count of bytes to write

   502    ;; H : address-high

   503    ;; L : address-low

   504    

   505    ;; now A contains the pressed keys

   506    0x2F ; complement A, by request. [D34F]

   507    

   508    0x47 ; A->B ;; now B contains the pressed keys

   509 

   510    0xCB ; test bit 5 of D (are we in o/p mode?)

   511    0x6A

   512    0x28 ; if test == 0, skip this o/p section

   513    0x13 ; JUMP

   514    

   515    0xCB ; else, test bit 0 of D (fragile; are we in pc mode?)

   516    0x42

   517    0x28 ; if test == 0, skip the following command

   518    0x01

   519 

   520    ;; output mode I: moving the program counter

   521    0xE9 ; ** move PC to (HL)

   522 

   523    ;; output mode II: writing bytes

   524    0xAF ; zero A

   525    0xBB ; compare count to zero. finished writing?

   526    0x28 ; if we are finished, jump back to cleanup

   527    0x00 ; TODO: set jump length backwards.

   528    

   529    ;; continue writing bytes

   530    0x78 ;; B->A

   531    0x22 ;; copy A to (HL) and increment HL. 

   532    0x18 ;; end frame. [goto D31F]

   533    0xB6 ;; JUMP

   534 

   535 

   536    ;; ---- end of o/p section

   537    

   538    ;; i/p mode

   539    ;; adhere to the mode discipline:

   540    ;; D must be one of 0x00 0x08 0x10 0x18.

   541 

   542    0x3E ;; load the constant 57 into A. [D369]

   543    0x57

   544    0x82 ;; add the mode to A

   545    0xEA ;; store A into "thing to execute"

   546    0x74 ;; ABSOLUTE LOCATION

   547    0xD3 ;; ABSOLUTE LOCATION

   548 

   549    0x3E ;; load the constant 8 into A

   550    0x08

   551    0x82 ;; add the mode to A

   552    

   553    0x57 ;; store the incremented mode into D

   554    0x78 ;; B->A; now A contains the pressed keys

   555    

   556    0x00 ;; var: thing to execute [D374]

   557 

   558    0x18 ;; end frame

   559    0xA8 ;; JUMP

   560    ]

   561   )

   562 

   563 (defn write-mem-dyl []

   564   (-> (tick (mid-game))

   565       (IE! 0)

   566       (inject-item-assembly (write-memory-assembly*))))

   567 

   568 (defn ntick [s n]

   569   (if (zero? n) s

   570       (do

   571         (set-state! s)

   572         (dorun (dotimes [_ n] 

   573                  (com.aurellem.gb.Gb/tick)))

   574         (update-state))))

   575 

   576 

   577 (defn find-frame-shift [state]

   578   ;;(restart!)

   579   (set-state! state)

   580   (loop [n 0]

   581     (if (>= (first (registers)) 0xD32D)

   582       (do (println n)

   583       (update-state))

   584       (do

   585         (com.aurellem.gb.Gb/tick)

   586         (recur (inc n) )))))

   587   

   588 (defn demo-assembly [n]

   589   (repeat n 0x00))

   590 

   591 

   592 (defn find-frame-shift* [state]

   593   (set-state! state)

   594   (loop []

   595     (com.aurellem.gb.Gb/tick)

   596     ;;(println (first (registers)))

   597     (if (>= (first (registers)) 0xD32D)

   598       (update-state)

   599       (recur))))

   600 

   601 

   602 (defn dylan**

   603   ([k]

   604   (->

   605    (tick (mid-game))

   606    (inject-item-assembly(write-memory-assembly*))

   607    ;;(find-frame-shift)

   608    (ntick k)

   609    (d-tick)

   610    (view-register "A" A)

   611    (view-register "B" B)

   612    (view-register "D" D)

   613    (view-register "E" E)

   614    (view-register "F" F)

   615    (#(do (println) %))

   616    ))

   617   ([] (dylan** 0)))

   618    

   619    

   620 

   621 

   622 (defn dylan* []

   623   (->

   624    (write-mem-dyl)

   625 

   626    (tick)

   627    (tick)

   628    (tick)

   629    (tick)

   630    (tick)

   631    (tick)

   632    (tick)

   633    (tick)

   634    (tick)

   635    (tick)

   636    (tick)

   637    (tick)

   638    (tick)

   639    (tick)

   640    (tick)

   641    (tick)

   642    (tick)

   643    (tick)

   644    (tick)

   645    (tick)

   646    (tick)

   647    (tick)

   648    (tick)

   649    (tick)

   650    (tick)

   651    (tick)

   652    (tick)

   653    (tick)

   654    (tick)

   655    (tick)

   656    (tick)

   657    (tick)

   658    (tick)

   659    (tick)

   660    (tick)

   661    (tick)

   662 

   663    ;;(view-memory 0xD374)

   664    (tick)

   665    (tick)

   666    (tick)

   667    (tick)

   668    (tick)

   669    (tick)

   670    (tick)

   671    (tick)

   672    (tick)

   673    (tick)

   674    (tick)

   675    (tick)

   676    (tick)

   677    (tick)

   678    (tick)

   679    ;;(view-memory 0xD374)

   680    (d-tick)

   681 

   682    (view-register "A" A)

   683    (view-register "B" B)

   684    (view-register "C" C))

   685 

   686 )

   687 

   688 

   689 (defn dylan []

   690   (->

   691    (write-mem-dyl)

   692    (tick)

   693    (tick)

   694    (tick)

   695    (tick)

   696    (tick)

   697    (tick)

   698    (tick)

   699    (tick)

   700    (tick)

   701    (tick)

   702    (tick)

   703    (tick)

   704    (tick)

   705    (tick)

   706    (tick) ;; first loop

   707 

   708 

   709    (tick)

   710    (tick)

   711    (tick)

   712    (tick)

   713    (tick)

   714    (tick)

   715    (tick)

   716    (tick)

   717    (tick)

   718    (tick)

   719    (tick)

   720    (tick)

   721    (tick) ;; dpad bits

   722 

   723    (tick)

   724    (tick)

   725    (tick)

   726    (tick)

   727    (tick)

   728    (tick)

   729    (tick)

   730    (tick)

   731    (d-tick)

   732    

   733 

   734    

   735    (view-register "A" A)

   736    (view-register "B" B)

   737    (view-register "C" C)

   738    

   739    ))

   740 

   741 

   742 

   743 

   744 (defn d2 []

   745   (->

   746    (write-mem-dyl)

   747    (view-memory 0xD31F)

   748    step step step step step

   749    (view-memory 0xD31F)))

   750 

   751 

   752 

   753 

   754 

   755 

   756 

   757 

   758 

   759 

   760 

   761 

   762 

   763 

   764 

   765 

   766 

   767 

   768 

   769 

   770 (defn write-memory-assembly []

   771   [

   772    ;; Main Timing Loop

   773    ;;   Constantly check for v-blank and Trigger main state machine on

   774    ;;   every transtion from v-blank to non-v-blank.

   775     

   776    0x18   ; D31D                  ; Variable declaration

   777    0x02   ; D31E                   

   778    0x00   ; D31F                  ; frame-count

   779    0x00   ; D320                  ; v-blank-prev 

   780    

   781    0xF0   ; D321                  ; load v-blank mode flags into A

   782    0x41

   783    0x00

   784 

   785 

   786    ;; Branch dependent on v-blank.  v-blank happens when the last two

   787    ;; bits in A are "01"

   788    0xCB   ; D324                  

   789    0x4F   ; D325                  

   790 

   791    0xC2   ; D326                  ; if bit-1 is not 0, then

   792    0x3E   ; D327                  ; GOTO non-v-blank.

   793    0xD3   ; D328                  

   794 

   795    0xCB   ; D329                  

   796    0x47   ; D32A                  

   797 

   798    0xCA   ; D32B                  ; if bit-0 is not 1, then

   799    0x3E   ; D32C                  ; GOTO non-v-blank.

   800    0xD3   ; D32D                  

   801 

   802    ;; V-Blank

   803    ;;   Activate state-machine if this is a transition event.

   804 

   805    0xFA   ; D32E                  ; load v-bank-prev into A

   806    0x20   ; D32F                  

   807    0xD3   ; D330                  

   808 

   809    0xFE   ; D331                  ; compare A to 0. >--------\ 

   810    0x00   ; D332                                              \

   811                                   ;                           |

   812    ;;   set v-blank-prev to 1.                                |

   813    0x3E   ; D333                  ; load 1 into A.            |

   814    0x01   ; D334                                              | 

   815                                   ;                           |

   816    0xEA   ; D335                  ; load A into v-blank-prev  |

   817    0x20   ; D336                                              |

   818    0xD3   ; D337                                              |

   819                                   ;                           /

   820    ;;   if v-blank-prev was 0, activate state-machine <------/

   821    0xCA   ; D338                  ; if v-blank-prev 

   822    0x46   ; D339                  ;   was 0, 

   823    0xD3   ; D33A                  ; GOTO state-machine

   824 

   825    0xC3   ; D33B                  

   826    0x1D   ; D33C                  

   827    0xD3   ; D33D                  ; GOTO beginning

   828    ;; END V-blank

   829 

   830    ;; Non-V-Blank

   831    ;;   Set v-blank-prev to 0

   832    0x3E   ; D33E                  ; load 0 into A

   833    0x00   ; D33F                  

   834 

   835    0xEA   ; D340                  ; load A into v-blank-prev

   836    0x20   ; D341                  

   837    0xD3   ; D342

   838    

   839    0xC3   ; D343                  

   840    0x1D   ; D344                  

   841    0xD3   ; D345                  ; GOTO beginning

   842    ;; END Not-V-Blank

   843 

   844    

   845    ;; Main State Machine -- Input Section

   846    ;;   This is called once every frame.

   847    ;;   It collects input and uses it to drive the

   848    ;;   state transitions.

   849 

   850    ;; Increment frame-count

   851    0xFA   ; D346                  ; load frame-count into A

   852    0x1F   ; D347                  

   853    0xD3   ; D348

   854    

   855    0x3C   ; D349                  ; inc A

   856 

   857    0xEA   ; D34A                  

   858    0x1F   ; D34B                  ; load A into frame-count

   859    0xD3   ; D34C

   860 

   861    0x00   ; D34D                  ; glue :)

   862    

   863    0x18   ;D34E                    ;  skip next 3 bytes

   864    0x03   ;D34F

   865           ;D350

   866    (Integer/parseInt "00100000" 2) ;  select directional pad

   867           ;D351

   868    (Integer/parseInt "00010000" 2) ;  select buttons

   869    0x00   ;D352                    ;  input-number

   870 

   871    ;; select directional pad; store low bits in B

   872    

   873    0xFA   ;D353                    ; load (D350) into A

   874    0x50   ;D354      -->       

   875    0xD3   ;D355      -->  D350     

   876    

   877    0xE0   ;D356                    ; load (A), which is 

   878    0x00   ;D357      -->           ; 00010000, into FF00

   879    0x00   ;D358      -->  FF00     ;; NO-OP

   880 

   881    0x06   ;D359

   882           ;D35A

   883    (Integer/parseInt "11110000" 2) ; "11110000" -> B 

   884    0xF0   ;D35B                    ; (FF00) -> A

   885    0x00   ;D35C                   

   886    0x00   ;D35D                    ;; NO-OP

   887 

   888    0xCB   ;D35E                    ; swap nybbles on A

   889    0x37   ;D35F

   890    0xA0   ;D360                    ; (AND A B) -> A

   891    0x47   ;D361                    ; A -> B

   892 

   893    ;; select buttons; store bottom bits in C

   894    

   895    0xFA   ;D362                    ; load (D351) into A

   896    0x51   ;D363      -->       

   897    0xD3   ;D364      -->  D351     

   898    

   899    0xE0   ;D365                    ; load (A), which is 

   900    0x00   ;D366      -->           ; 00001000, into FF00

   901    0x00   ;D367      -->  FF00     ;; NO-OP

   902 

   903    0x0E   ;D368

   904           ;D369

   905    (Integer/parseInt "00001111" 2) ; "00001111" -> C 

   906 

   907    0xF0   ;D36A                    ; (FF00) -> A

   908    0x00   ;D36B                   

   909    0x00   ;D36C

   910    

   911    0xA1   ;D36D                    ; (AND A C) -> A

   912    0x4F   ;D36E                    ; A -> C

   913 

   914    ;; combine the B and C registers into the input number

   915    0x79   ;D36F                    ; C -> A

   916    0xB0   ;D370                    ; (OR A B) -> A

   917    0x2F   ;D371                    ; negate A

   918 

   919    0xEA   ;D372                    ; store A into input-number

   920    0x52   ;D373

   921    0xD3   ;D374

   922 

   923    0x00   ;D375                  

   924    0x00   ;D376

   925    0x00   ;D377

   926    0x00   ;D378

   927    0x00   ;D379

   928    0x00   ;D37A

   929    0x00   ;D37B                   ; these are here because 

   930    0x00   ;D37C                   ; I messed up :(

   931    0x00   ;D37D

   932    0x00   ;D37E

   933    0x00   ;D37F

   934    

   935    ;; beginning of main state machine   

   936    0x18   ;D380                    ; Declaration of variables

   937    0x05   ;D381                    ;  5 variables:

   938    0x00   ;D382                    ;    current-mode

   939    0x00   ;D383                    ;    bytes-to-write

   940    0x00   ;D384                    ;    bytes-written

   941    0x00   ;D385                    ;    start-point-high

   942    0x00   ;D386                    ;    start-point-low

   943 

   944 

   945    ;; banch on current mode

   946    0xFA   ;D387                    ; load current-mode (0xD382)

   947    0x82   ;D388                    ; into A

   948    0xD3   ;D389

   949    0x00   ;D38A

   950 

   951 

   952    ;;  GOTO Mode 0 (input-mode) if current-mode is 0

   953    0xFE   ;D38B

   954    0x00   ;D38C                    ; compare A with 0x00

   955 

   956    0xCA   ;D38D                    ; goto Mode 0 if A == 0

   957    0xA8   ;D38E

   958    0xD3   ;D38F

   959 

   960    ;; GOTO Mode 1 (set-length) if current-mode is 1

   961    0xFE   ;D390

   962    0x01   ;D391                    ; compare A with 0x01

   963 

   964    0xCA   ;D392                  

   965    0xB1   ;D393 

   966    0xD3   ;D394                    ; goto Mode 1 if A == 1

   967 

   968    ;; GOTO Mode 2 (set-start-point-high) if current mode is 2

   969    0xFE   ;D395                    

   970    0x02   ;D396                    ; compare A with 0x02

   971 

   972    0xCA   ;D397

   973    0xBF   ;D398

   974    0xD3   ;D399                    ; goto Mode 2 if A == 2

   975 

   976    ;; GOTO Mode 3 (set-start-point-low) if current mode is 3

   977    0xFE   ;D39A

   978    0x03   ;D39B

   979 

   980    0xCA   ;D39C

   981    0xCD   ;D39D

   982    0xD3   ;D39E                    ; goto Mode 3 if A == 3

   983 

   984    ;; GOTO Mode 4 (write-memory) if current mode is 4

   985    0xFE   ;D39F

   986    0x04   ;D3A0

   987 

   988    0xCA   ;D3A1

   989    0xDB   ;D3A2

   990    0xD3   ;D3A3

   991 

   992    0x00   ;D3A4

   993    ;; End of Mode checking, goto beginning

   994    0xC3   ;D3A5

   995    0x1D   ;D3A6

   996    0xD3   ;D3A7

   997 

   998 

   999    ;; Mode 0 -- input-mode mode

  1000    ;;     means that we are waiting for a mode, so set the mode to

  1001    ;;     whatever is currently in input-number.  If nothing is

  1002    ;;     entered, then the program stays in input-mode mode

  1003 

  1004    ;;   set current-mode to input-number

  1005    0xFA   ;D3A8                    ; load input-number (0xD352) 

  1006    0x52   ;D3A9                    ; into A

  1007    0xD3   ;D3AA

  1008 

  1009    0xEA   ;D3AB                    ; load A into current-mode

  1010    0x82   ;D3AC                    ; (0xD382)

  1011    0xD3   ;D3AD

  1012 

  1013    0xC3   ;D3AE                    ; go back to beginning

  1014    0x1D   ;D3AF

  1015    0xD3   ;D3B0

  1016    ;; End Mode 0

  1017 

  1018 

  1019    ;; Mode 1 -- set-length mode

  1020    ;;      This is the header for writing things to memory.

  1021    ;;      User specifies the number of bytes to write.

  1022    ;;      Mode is auto advanced to Mode 2 after this mode

  1023    ;;      completes.

  1024 

  1025    ;;      Set bytes left to write to input-number;

  1026    ;;      set current-mode to 0x02.

  1027    0xFA   ;D3B1                   ; load input-number (0xD352)

  1028    0x52   ;D3B2                   ; into A

  1029    0xD3   ;D3B3

  1030    

  1031    0xEA   ;D3B4                   ; load A into bytes-left-to-write

  1032    0x83   ;D3B5                   ; (0xD383)

  1033    0xD3   ;D3B6

  1034 

  1035    0x3E   ;D3B7                   ; load 0x02 into A.

  1036    0x02   ;D3B8

  1037    

  1038    0xEA   ;D3B9                   ; load A to current-mode

  1039    0x82   ;D3BA                   ; advancing from Mode 1 to 

  1040    0xD3   ;D3BB                   ; Mode 2

  1041    

  1042    0xC3   ;D3BC                   ; go back to beginning

  1043    0x1D   ;D3BD

  1044    0xD3   ;D3BE

  1045    ;; End Mode 1

  1046 

  1047 

  1048    ;; Mode 2 -- set start-point-high mode

  1049    ;;      Middle part of the header for writing things to memory.

  1050    ;;      User specifies the start location in RAM to which 

  1051    ;;      data will be written.

  1052    ;;      Mode is auto advanced to Mode 3 after this mode completes.

  1053 

  1054    ;;      Set start-point-high to input-number;

  1055    ;;      set current mode to 0x03.

  1056    0xFA   ;D3BF                   ; load input-number (0xD352)

  1057    0x52   ;D3C0                   ; into A

  1058    0xD3   ;D3C1

  1059 

  1060    0xEA   ;D3C2                   ; load A into start-point-high

  1061    0x85   ;D3C3                   ; (0xD385)

  1062    0xD3   ;D3C4

  1063 

  1064    0x3E   ;D3C5                   ; load 0x03 into A.

  1065    0x03   ;D3C6

  1066 

  1067    0xEA   ;D3C7                   ; load A to current-mode,

  1068    0x82   ;D3C8                   ; advancing from Mode 2 to 

  1069    0xD3   ;D3C9                   ; Mode 3.

  1070    

  1071    0xC3   ;D3CA                   ; go back to beginning

  1072    0x1D   ;D3CB

  1073    0xD3   ;D3CC

  1074    ;;End Mode 2

  1075 

  1076 

  1077    ;; Mode 3 -- set-start-point-low mode

  1078    ;;      Final part of header for writing things to memory.

  1079    ;;      User specifies the low bytes of 16 bit start-point.

  1080 

  1081    ;;      Set start-point-low to input-number;

  1082    ;;      set current mode to 0x04

  1083    0xFA   ;D3CD                   ; load input-number into A

  1084    0x52   ;D3CE                   

  1085    0xD3   ;D3CF                   

  1086 

  1087    0xEA   ;D3D0                   ; load A into start-point-low

  1088    0x86   ;D3D1                   

  1089    0xD3   ;D3D2                   

  1090 

  1091    0x3E   ;D3D3                   ; load 0x04 into A.

  1092    0x04   ;D3D4                   

  1093 

  1094    0xEA   ;D3D5                   ; load A to current-mode,

  1095    0x82   ;D3D6                   ; advancing from Mode 3 to 

  1096    0xD3   ;D3D7                   ; Mode 4.

  1097 

  1098    0xC3   ;D3D8                   ; go back to beginning

  1099    0x1D   ;D3D9                   

  1100    0xD3   ;D3DA                   

  1101    

  1102    ;; Mode 4 -- write bytes mode

  1103 

  1104    ;;      This is where RAM manipulation happens.  User supplies

  1105    ;;      bytes every frame, which are written sequentially to

  1106    ;;      start-point until bytes-to-write have been written. Once

  1107    ;;      bytes-to-write have been written, the mode is reset to 0.

  1108 

  1109    ;;   compare bytes-written with bytes-to-write.

  1110    ;;   if they are the same, then reset mode to 0

  1111   

  1112    0xFA   ;D3DB                   ; load bytes-to-write into A

  1113    0x83   ;D3DC

  1114    0xD3   ;D3DD

  1115 

  1116    0x47   ;D3DE                   ; load A into B

  1117 

  1118    0xFA   ;D3DF                   ; load bytes-written into A

  1119    0x84   ;D3E0

  1120    0xD3   ;D3E1

  1121 

  1122    0xB8   ;D3E2                   ; compare A with B

  1123 

  1124    0xCA   ;D3E3                   ; if they are equal, go to cleanup

  1125    0x07   ;D3E4                   

  1126    0xD4   ;D3E5                   

  1127 

  1128    ;;  Write Memory Section

  1129    ;;    Write the input-number, interpreted as an 8-bit number,

  1130    ;;    into the current target register, determined by

  1131    ;;    (+ start-point bytes-written).

  1132    ;;    Then, increment bytes-written by 1.

  1133    

  1134    0xFA   ;D3E6                   ; load start-point-high into A

  1135    0x85   ;D3E7                   

  1136    0xD3   ;D3E8                   

  1137 

  1138    0x67   ;D3E9                   ; load A into H

  1139 

  1140    0xFA   ;D3EA                   ; load start-point-low into A

  1141    0x86   ;D3EB                   

  1142    0xD3   ;D3EC

  1143    

  1144    0x6F   ;D3ED                   ; load A into L

  1145    

  1146    0xFA   ;D3EE                   ; load bytes-written into A

  1147    0x84   ;D3EF                   

  1148    0xD3   ;D3F0                   

  1149    

  1150    0x00   ;D3F1                   ; These are here because

  1151    0x00   ;D3F2                   ; I screwed up again.

  1152    0x00   ;D3F3                   

  1153 

  1154    0x85   ;D3F4                   ; add L to A; store A in L.

  1155    0x6F   ;D3F5                   

  1156 

  1157    0x30   ;D3F6                   ; If the addition overflowed,

  1158    0x01   ;D3F7                   

  1159    0x24   ;D3F8                   ; increment H.

  1160 

  1161    ;;   Now, HL points to the correct place in memory

  1162    

  1163    0xFA   ;D3F9                   ; load input-number into A

  1164    0x52   ;D3FA                   

  1165    0xD3   ;D3FB                   

  1166 

  1167    0x77   ;D3FC                   ; load A into (HL)

  1168 

  1169    0xFA   ;D3FD                   ; load bytes-written into A

  1170    0x84   ;D3FE                   

  1171    0xD3   ;D3FF                   

  1172 

  1173    0x3C   ;D400                   ; increment A

  1174 

  1175    0xEA   ;D401                   ; load A into bytes-written

  1176    0x84   ;D402                   

  1177    0xD3   ;D403

  1178 

  1179    0xC3   ;D404                   ; go back to beginning.

  1180    0x1D   ;D405

  1181    0xD3   ;D406

  1182    ;;  End Write Memory Section

  1183 

  1184    ;;  Mode 4 Cleanup Section

  1185    ;;    reset bytes-written to 0

  1186    ;;    set mode to 0

  1187    0x3E   ;D407                   ; load 0 into A

  1188    0x00   ;D408                  

  1189 

  1190    0xEA   ;D409                   ; load A into bytes-written

  1191    0x84   ;D40A                   

  1192    0xD3   ;D40B                   

  1193 

  1194    0xEA   ;D40C                   ; load A into current-mode

  1195    0x82   ;D40D                   

  1196    0xD3   ;D40E                   

  1197 

  1198    0xC3   ;D40F                    ; go back to beginning

  1199    0x1D   ;D410

  1200    0xD3   ;D411

  1201 

  1202    ;; End Mode 4

  1203    

  1204    ])

  1205 

  1206 

  1207 

  1208 (def frame-count 0xD31F)

  1209 (def input 0xD352)

  1210 (def current-mode      0xD382)

  1211 (def bytes-to-write    0xD383)

  1212 (def bytes-written     0xD384)

  1213 (def start-point-high  0xD385)

  1214 (def start-point-low   0xD386)

  1215 

  1216 

  1217 

  1218 (defn write-memory []

  1219   (-> (tick (mid-game))

  1220       (IE! 0) ; disable interrupts

  1221       (inject-item-assembly (write-memory-assembly))))

  1222 

  1223 (defn test-write-memory []

  1224   (set-state! (write-memory))

  1225   (dorun

  1226    (dotimes [_ 5000]

  1227      (view-memory (step @current-state) current-mode))))

  1228 

  1229 (def bytes-to-write 0xD383)

  1230 (def start-point 0xD384)

  1231 

  1232 (defn print-blank-assembly

  1233   [start end]

  1234   (dorun

  1235    (map

  1236     #(println (format "0x00   ;%04X                   " %))

  1237     (range start end))))

  1238 

  1239 (defn test-mode-2 []

  1240   (->

  1241    (write-memory)

  1242    (view-memory frame-count)

  1243    (step)

  1244    (step [:a])

  1245    (step [:b])

  1246    (step [:start])

  1247    (step [])

  1248    (view-memory frame-count)))

  1249 

  1250 

  1251 

  1252 (defn dylan-test-mode

  1253   ([] (dylan-test-mode (write-mem-dyl)))

  1254   ([target-state]

  1255      (let [

  1256            v-blank-prev 54046

  1257            btn-register 65280

  1258            eggs 0xD374

  1259            ]

  1260        

  1261        (->

  1262         target-state

  1263         

  1264         (tick)

  1265         (tick)

  1266         (tick)

  1267         (tick);; jumps back to beginning

  1268         

  1269         (tick)

  1270         (tick)

  1271         (tick)

  1272         (tick)

  1273         (tick)

  1274         (tick)

  1275         (tick)

  1276         (tick)

  1277         (tick)

  1278         (tick)

  1279         (tick)

  1280         (tick)

  1281 

  1282                

  1283         (tick)

  1284         (tick)

  1285         (tick)

  1286         (tick)

  1287         (tick)

  1288         (tick)

  1289         (tick)

  1290         (tick)

  1291         (tick)

  1292         (tick)

  1293         (tick)

  1294         (tick)

  1295         (tick)

  1296         (tick)

  1297         (tick)

  1298         (tick)

  1299         (tick)

  1300         (tick)

  1301         (tick)

  1302         (tick)

  1303         (tick) ;; just complemented A

  1304 

  1305         (tick)

  1306         (DE! 0x1800)

  1307         (AF! 0x7700) ;; change inputs @ A

  1308         (tick)

  1309         (tick)

  1310         (tick)

  1311         (tick)

  1312         (tick)

  1313 

  1314         ;;(view-memory eggs)

  1315         (tick)

  1316         (tick)

  1317         ;;(view-memory eggs)

  1318         (tick)

  1319         (tick)

  1320         (tick)

  1321         (tick)

  1322         (tick)

  1323         (tick)

  1324         (d-tick)

  1325 

  1326         

  1327         ;;(view-memory btn-register) 

  1328         (view-register "A" A)

  1329         (view-register "B" B)

  1330         

  1331         ;;(view-register "C" C)

  1332         (view-register "D" D)

  1333         (view-register "E" E)

  1334         (view-register "H" H)

  1335         (view-register "L" L)

  1336         ))))

  1337   

  1338 (defn test-mode-4

  1339   ([] (test-mode-4 (write-memory)))

  1340   ([target-state]

  1341      (->

  1342       target-state

  1343       (#(do (println "memory from 0xC00F to 0xC01F:"

  1344                      (subvec (vec (memory %)) 0xC00F 0xC01F)) %))

  1345       (view-memory current-mode)

  1346       (step [])

  1347       (step [])

  1348       (step [])

  1349       (#(do (println "after three steps") %))

  1350       (view-memory current-mode)

  1351 

  1352       ;; Activate memory writing mode

  1353       

  1354       (#(do (println "step with [:a]") %))

  1355       (step [:a])

  1356       (view-memory current-mode)

  1357       (view-memory bytes-to-write)

  1358       (view-memory start-point-high)

  1359       (view-memory start-point-low)

  1360 

  1361       ;; Specify four bytes to be written

  1362       

  1363       (#(do (println "step with [:select]")%))

  1364       (step [:select])

  1365       (view-memory current-mode)

  1366       (view-memory bytes-to-write)

  1367       (view-memory start-point-high)

  1368       (view-memory start-point-low)

  1369 

  1370       ;; Specify target memory address as 0xC00F

  1371       

  1372       (#(do (println "step with [:u :d]")%))

  1373       (step [:u :d])

  1374       (view-memory current-mode)

  1375       (view-memory bytes-to-write)

  1376       (view-memory start-point-high)

  1377       (view-memory start-point-low)

  1378 

  1379       (#(do (println "step with [:a :b :start :select]")%))

  1380       (step [:a :b :start :select])

  1381       (view-memory current-mode)

  1382       (view-memory bytes-to-write)

  1383       (view-memory start-point-high)

  1384       (view-memory start-point-low)

  1385 

  1386       ;; Start reprogramming memory

  1387 

  1388       (#(do (println "step with [:a]")%))

  1389       (step [:a])

  1390       (view-memory current-mode)

  1391       (view-memory bytes-written)

  1392 

  1393       (#(do (println "step with [:b]")%))

  1394       (step [:b])

  1395       (view-memory current-mode)

  1396       (view-memory bytes-written)

  1397 

  1398       (#(do (println "step with [:a :b]")%))

  1399       (step [:a :b])

  1400       (view-memory current-mode)

  1401       (view-memory bytes-written)

  1402 

  1403       (#(do (println "step with [:select]")%))

  1404       (step [:select])

  1405       (view-memory current-mode)

  1406       (view-memory bytes-written)

  1407 

  1408       ;; Reprogramming done, program ready for more commands.

  1409 

  1410       (#(do (println "step with []")%))

  1411       (step [])

  1412       (view-memory current-mode)

  1413       (view-memory bytes-written)

  1414       

  1415       (#(do (println "memory from 0xC00F to 0xC01F:"

  1416                      (subvec (vec (memory %)) 0xC00F 0xC01F)) %)))))

  1417 

  1418 

  1419 

  1420 

  1421 

  1422 

  1423 ;;; ASSEMBLY-READING UTILITIES

  1424 

  1425 (def opcodes

  1426   [

  1427    "NOP"

  1428    "LD BC,nn"

  1429    "LD (BC),A"

  1430    "INC BC"

  1431    "INC B"

  1432    "DEC B"

  1433    "LD B,n"

  1434    "RLC A"

  1435    "LD (nn),SP"

  1436    "ADD HL,BC"

  1437    "LD A,(BC)"

  1438    "DEC BC"

  1439    "INC C"

  1440    "DEC C"

  1441    "LD C,n"

  1442    "RRC A"

  1443 

  1444    "STOP"

  1445    "LD DE,nn"

  1446    "LD (DE),A"

  1447    "INC DE"

  1448    "INC D"

  1449    "DEC D"

  1450    "LD D,n"

  1451    "RL A"

  1452    "JR n"

  1453    "ADD HL,DE"

  1454    "LD A,(DE)"

  1455    "DEC DE"

  1456    "INC E"

  1457    "DEC E"

  1458    "LD E,n"

  1459    "RR A"

  1460 

  1461    "JR NZ,n"

  1462    "LD HL,nn"

  1463    "LDI (HL),A"

  1464    "INC HL"

  1465    "INC H"

  1466    "DEC H"

  1467    "LD H,n"

  1468    "DAA"

  1469    "JR Z,n"

  1470    "ADD HL,HL"

  1471    "LDI A,(HL)"

  1472    "DEC HL"

  1473    "INC L"

  1474    "DEC L"

  1475    "LD L,n"

  1476    "CPL"

  1477 

  1478    "JR NC,n"

  1479    "LD SP,nn"

  1480    "LDD (HL),A"

  1481    "INC SP"

  1482    "INC (HL)"

  1483    "DEC (HL)"

  1484    "LD (HL),n"

  1485    "SCF"

  1486    "JR C,n"

  1487    "ADD HL,SP"

  1488    "LDD A,(HL)"

  1489    "DEC SP"

  1490    "INC A"

  1491    "DEC A"

  1492    "LD A,n"

  1493    "CCF"

  1494 

  1495    "LD B,B"

  1496    "LD B,C"

  1497    "LD B,D"

  1498    "LD B,E"

  1499    "LD B,H"

  1500    "LD B,L"

  1501    "LD B,(HL)"

  1502    "LD B,A"

  1503    "LD C,B"

  1504    "LD C,C"

  1505    "LD C,D"

  1506    "LD C,E"

  1507    "LD C,H"

  1508    "LD C,L"

  1509    "LD C,(HL)"

  1510    "LD C,A"

  1511 

  1512    "LD D,B"

  1513    "LD D,C"

  1514    "LD D,D"

  1515    "LD D,E"

  1516    "LD D,H"

  1517    "LD D,L"

  1518    "LD D,(HL)"

  1519    "LD D,A"

  1520    "LD E,B"

  1521    "LD E,C"

  1522    "LD E,D"

  1523    "LD E,E"

  1524    "LD E,H"

  1525    "LD E,L"

  1526    "LD E,(HL)"

  1527    "LD E,A"

  1528 

  1529    "LD H,B"

  1530    "LD H,C"

  1531    "LD H,D"

  1532    "LD H,E"

  1533    "LD H,H"

  1534    "LD H,L"

  1535    "LD H,(HL)"

  1536    "LD H,A"

  1537    "LD L,B"

  1538    "LD L,C"

  1539    "LD L,D"

  1540    "LD L,E"

  1541    "LD L,H"

  1542    "LD L,L"

  1543    "LD L,(HL)"

  1544    "LD L,A"

  1545 

  1546    "LD (HL),B"

  1547    "LD (HL),C"

  1548    "LD (HL),D"

  1549    "LD (HL),E"

  1550    "LD (HL),H"

  1551    "LD (HL),L"

  1552    "HALT"

  1553    "LD (HL),A"

  1554    "LD A,B"

  1555    "LD A,C"

  1556    "LD A,D"

  1557    "LD A,E"

  1558    "LD A,H"

  1559    "LD A,L"

  1560    "LD A,(HL)"

  1561    "LD A,A"

  1562 

  1563    "ADD A,B"

  1564    "ADD A,C"

  1565    "ADD A,D"

  1566    "ADD A,E"

  1567    "ADD A,H"

  1568    "ADD A,L"

  1569    "ADD A,(HL)"

  1570    "ADD A,A"

  1571    "ADC A,B"

  1572    "ADC A,C"

  1573    "ADC A,D"

  1574    "ADC A,E"

  1575    "ADC A,H"

  1576    "ADC A,L"

  1577    "ADC A,(HL)"

  1578    "ADC A,A"

  1579 

  1580    "SUB A,B"

  1581    "SUB A,C"

  1582    "SUB A,D"

  1583    "SUB A,E"

  1584    "SUB A,H"

  1585    "SUB A,L"

  1586    "SUB A,(HL)"

  1587    "SUB A,A"

  1588    "SBC A,B"

  1589    "SBC A,C"

  1590    "SBC A,D"

  1591    "SBC A,E"

  1592    "SBC A,H"

  1593    "SBC A,L"

  1594    "SBC A,(HL)"

  1595    "SBC A,A"

  1596 

  1597    "AND B"

  1598    "AND C"

  1599    "AND D"

  1600    "AND E"

  1601    "AND H"

  1602    "AND L"

  1603    "AND (HL)"

  1604    "AND A"

  1605    "XOR B"

  1606    "XOR C"

  1607    "XOR D"

  1608    "XOR E"

  1609    "XOR H"

  1610    "XOR L"

  1611    "XOR (HL)"

  1612    "XOR A"

  1613 

  1614    "OR B"

  1615    "OR C"

  1616    "OR D"

  1617    "OR E"

  1618    "OR H"

  1619    "OR L"

  1620    "OR (HL)"

  1621    "OR A"

  1622    "CP B"

  1623    "CP C"

  1624    "CP D"

  1625    "CP E"

  1626    "CP H"

  1627    "CP L"

  1628    "CP (HL)"

  1629    "CP A"

  1630 

  1631    "RET NZ"

  1632    "POP BC"

  1633    "JP NZ,nn"

  1634    "JP nn"

  1635    "CALL NZ,nn"

  1636    "PUSH BC"

  1637    "ADD A,n"

  1638    "RST 0"

  1639    "RET Z"

  1640    "RET"

  1641    "JP Z,nn"

  1642    "Ext ops"

  1643    "CALL Z,nn"

  1644    "CALL nn"

  1645    "ADC A,n"

  1646    "RST 8"

  1647 

  1648    "RET NC"

  1649    "POP DE"

  1650    "JP NC,nn"

  1651    "XX"

  1652    "CALL NC,nn"

  1653    "PUSH DE"

  1654    "SUB A,n"

  1655    "RST 10"

  1656    "RET C"

  1657    "RETI"

  1658    "JP C,nn"

  1659    "XX"

  1660    "CALL C,nn"

  1661    "XX"

  1662    "SBC A,n"

  1663    "RST 18"

  1664 

  1665    "LDH (n),A"

  1666    "POP HL"

  1667    "LDH (C),A"

  1668    "XX"

  1669    "XX"

  1670    "PUSH HL"

  1671    "AND n"

  1672    "RST 20"

  1673    "ADD SP,d"

  1674    "JP (HL)"

  1675    "LD (nn),A"

  1676    "XX"

  1677    "XX"

  1678    "XX"

  1679    "XOR n"

  1680    "RST 28"

  1681 

  1682    "LDH A,(n)"

  1683    "POP AF"

  1684    "XX"

  1685    "DI"

  1686    "XX"

  1687    "PUSH AF"

  1688    "OR n"

  1689    "RST 30"

  1690    "LDHL SP,d"

  1691    "LD SP,HL"

  1692    "LD A,(nn)"

  1693    "EI"

  1694    "XX"

  1695    "XX"

  1696    "CP n"

  1697    "RST 38"])

  1698 

  1699 

  1700 (defn hex

  1701   "Converts the number into a hexadecimal-formatted symbol."

  1702   [n]

  1703   (symbol (str "0x" (.toUpperCase (Integer/toHexString n)))))

  1704 

  1705 

  1706 

  1707 (defn arity

  1708   "Returns the arity of the given opcode (hex numeral)."

  1709   [op]

  1710   (cond

  1711     (#{0x06 0x0E 0x16 0x1E

  1712        0x20 0x26 0x28 0x2E

  1713        0x30 0x36 0x38 0x3E

  1714        0xC6 0xD6 0xCE 0xDE

  1715        0xE0 0xF0 0xE6 0xF6

  1716        0xEE 0xFE} op)

  1717     1

  1718     (#{0x01 0x08 0x11 0x21

  1719        0x31 0xC2 0xC3 0xC4

  1720        0xCA 0xDA 0xCC 0xDC

  1721        0xCD 0xEA 0xFA} op)

  1722     2

  1723     :else

  1724     0))
author	Robert McIntyre <rlm@mit.edu>
date	Mon, 26 Mar 2012 18:01:39 -0500
parents	2e751984b42d
children