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annotate clojure/com/aurellem/gb/rlm_assembly.clj @ 403:ea37e98e188e

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removed one opcode
author Robert McIntyre <rlm@mit.edu>
date Fri, 13 Apr 2012 09:59:32 -0500
parents eee219d1a259
children 41647cb85901
rev   line source
rlm@377 1 (ns com.aurellem.gb.rlm-assembly
rlm@377 2 "Version of main bootstrap program that is valid output for the
rlm@377 3 item-writer program."
rlm@377 4 (:use (com.aurellem.gb gb-driver assembly util vbm constants))
rlm@377 5 (:use (com.aurellem.run bootstrap-1))
rlm@377 6 (:import [com.aurellem.gb.gb_driver SaveState]))
rlm@377 7
rlm@390 8
rlm@390 9 ;; MODE-SELECT
rlm@390 10 ;; SET-LENGTH
rlm@390 11 ;; SET-TARGET
rlm@390 12 ;; WRITE
rlm@390 13 ;; JUMP
rlm@390 14
rlm@377 15 ;; Specs for Main Bootstrap Program
rlm@377 16
rlm@377 17 ;; Number-Input
rlm@377 18 ;; Number input works using all eight buttons to
rlm@377 19 ;; spell out an 8 bit number. The order of buttons is
rlm@377 20 ;; [:d :u :l :r :start :select :b :a] --> 11111111
rlm@377 21 ;; [ :l :start :a] --> 00101001
rlm@377 22
rlm@377 23 ;;; MODE-SELECT
rlm@377 24 ;; The bootstrap program starts in MODE-SELECT mode.
rlm@377 25 ;; MODE-SELECT transitions to one of three modes depending
rlm@377 26 ;; on which buttons are pressed:
rlm@377 27 ;; 0 (no-buttons) : MODE-SELECT
rlm@377 28 ;; 8 [:start] : WRITE-BYTES
rlm@377 29 ;; 0xFF (all-buttons) : JUMP
rlm@377 30
rlm@377 31 ;;; WRITE-BYTES
rlm@377 32
rlm@377 33 ;; WRITE-BYTES mode writes sequences of arbitray values to
rlm@377 34 ;; arbitray memory locations. It expects you to enter a
rlm@377 35 ;; header of three bytes describing what to write:
rlm@377 36
rlm@377 37 ;; Byte 0 : Number of Bytes to Write
rlm@377 38 ;; Byte 1 : Start Address High Byte
rlm@377 39 ;; Byte 1 : Start Address Low Byte
rlm@377 40
rlm@377 41 ;; Then, you enter the number of bytes specified in Byte 0
rlm@377 42 ;; they are written to the start address in
rlm@377 43 ;; sequence. After the last byte is written control
rlm@377 44 ;; returns to MODE-SELECT mode.
rlm@377 45
rlm@377 46 ;; Example: to write the sequence [1 2 3 4] starting at
rlm@377 47 ;; address 0xC01F enter
rlm@377 48 ;; Byte 0 : 4 (will write four bytes)
rlm@377 49 ;; Byte 1 : 0xC0 (high byte of 0xC01F)
rlm@377 50 ;; Byte 2 : 0x1F (low byte of 0xC01F)
rlm@377 51 ;; Byte 3 : 1 (write 1 to 0xC01F)
rlm@377 52 ;; Byte 4 : 2 (write 2 to 0xC020)
rlm@377 53 ;; Byte 5 : 3 (write 3 to 0xC021)
rlm@377 54 ;; Byte 6 : 4 (write 4 to 0xC022)
rlm@377 55
rlm@377 56 ;;; JUMP
rlm@377 57 ;; JUMP mode jumps program control to any arbitray
rlm@377 58 ;; location. It expects you to enter two bytes which
rlm@377 59 ;; correspond to the high and low bytes of the memory
rlm@377 60 ;; address to which you want to jump.
rlm@377 61 ;; Byte 0 : Jump Address High Byte
rlm@377 62 ;; Byte 1 : Jump Address Low Byte
rlm@377 63
rlm@377 64 ;; Example: to jump to address 0x1234 enter
rlm@377 65 ;; Byte 0 : 0x12 (high byte of 0x1234)
rlm@377 66 ;; Byte 1 : 0x34 (low byte of 0x1234)
rlm@377 67
rlm@377 68
rlm@378 69 (defn ->signed-8-bit [n]
rlm@378 70 (if (< n 0)
rlm@378 71 (+ 256 n) n))
rlm@378 72
rlm@403 73 (defn frame-metronome
rlm@403 74 ([] (frame-metronome true))
rlm@403 75 ([spin-loop?]
rlm@403 76 (let [init [0xC5] ;; save value of BC
rlm@403 77 timing-loop
rlm@403 78 [0x01 ; \
rlm@403 79 0x43 ; |
rlm@403 80 0xFE ; | load 0xFF44 into BC without repeats
rlm@403 81 0x0C ; |
rlm@403 82 0x04 ; /
rlm@403 83 0x0A] ;; (BC) -> A, now A = LY (vertical line coord)
rlm@403 84 continue-if-144
rlm@403 85 [0xFE
rlm@403 86 144 ;; compare LY (in A) with 144
rlm@403 87 0x20 ;; jump back to beginning if LY != 144 (not-v-blank)
rlm@403 88 (->signed-8-bit
rlm@403 89 (+ -4 (- (count timing-loop))))]
rlm@403 90 spin-loop
rlm@403 91 [0x05 ;; dec B, which is 0xFF
rlm@403 92 0x20 ;; spin until B==0
rlm@403 93 0xFD]]
rlm@403 94 (concat init timing-loop continue-if-144
rlm@403 95 (if spin-loop?
rlm@403 96 spin-loop [])))))
rlm@378 97
rlm@379 98 (defn test-frame-metronome
rlm@379 99 "Ensure that frame-metronome ticks exactly once every frame."
rlm@379 100 ([] (test-frame-metronome 151))
rlm@379 101 ([steps]
rlm@388 102 (let [inc-E [0x1C 0x18
rlm@379 103 (->signed-8-bit
rlm@379 104 (+ -3 (- (count (frame-metronome)))))]
rlm@388 105 program (concat (frame-metronome) inc-E)
rlm@379 106 count-frames
rlm@379 107 (-> (tick (mid-game))
rlm@379 108 (IE! 0)
rlm@388 109 (DE! 0)
rlm@379 110 (set-memory-range pokemon-list-start program)
rlm@379 111 (PC! pokemon-list-start))
rlm@390 112 E-after-moves
rlm@390 113 (E (run-moves count-frames (repeat steps [])))]
rlm@388 114 (println "E:" E-after-moves)
rlm@388 115 (assert (= steps E-after-moves))
rlm@379 116
rlm@388 117 (println "E =" E-after-moves "after" steps "steps")
rlm@379 118 count-frames)))
rlm@379 119
rlm@384 120 (defn read-user-input []
rlm@388 121 [0x3E
rlm@388 122 0x20 ; prepare to measure d-pad
rlm@384 123
rlm@388 124 0x01 ;\
rlm@388 125 0x01 ; |
rlm@388 126 0xFE ; | load 0xFF00 into BC without repeats
rlm@388 127 0x04 ; |
rlm@388 128 0x0D ;/
rlm@386 129
rlm@388 130 0x02
rlm@388 131 0x0A ;; get D-pad info
rlm@385 132
rlm@385 133 0xF5 ;; push AF
rlm@385 134
rlm@385 135 0x3E
rlm@388 136 0x10 ; prepare to measure buttons
rlm@388 137
rlm@388 138 0x3F ;; clear carry flag no-op to prevent repeated nybbbles
rlm@385 139
rlm@388 140 0x02
rlm@388 141 0x0A ;; get button info
rlm@385 142
rlm@384 143 0xE6 ;; select bottom bits of A
rlm@384 144 0x0F
rlm@384 145
rlm@388 146 0x47 ;; A->B
rlm@385 147
rlm@385 148 0xF1 ;; pop AF
rlm@385 149
rlm@385 150 0xE6
rlm@385 151 0x0F ;; select bottom bits of A
rlm@385 152
rlm@384 153 0xCB
rlm@384 154 0x37 ;; swap A nybbles
rlm@387 155
rlm@388 156 0xB0 ;; (or A B) -> A
rlm@387 157
rlm@384 158 0x2F ;; (NOT A) -> A
rlm@390 159
rlm@384 160 ])
rlm@384 161
rlm@384 162 (defn test-read-user-input []
rlm@384 163 (let [program
rlm@384 164 (concat
rlm@384 165 (frame-metronome) (read-user-input)
rlm@388 166 [0x5F ;; A-> E
rlm@384 167 0x18
rlm@384 168 (->signed-8-bit
rlm@384 169 (+ (- (count (frame-metronome)))
rlm@384 170 (- (count (read-user-input)))
rlm@384 171 (- 3)))])
rlm@384 172 read-input
rlm@384 173 (-> (tick (mid-game))
rlm@384 174 (IE! 0)
rlm@384 175 (set-memory-range pokemon-list-start program)
rlm@384 176 (PC! pokemon-list-start))]
rlm@384 177 (dorun
rlm@385 178 (for [i (range 0x100)]
rlm@388 179 (assert (= (E (step read-input (buttons i))) i))))
rlm@385 180 (println "Tested all inputs.")
rlm@384 181 read-input))
rlm@384 182
rlm@393 183 (def symbol-index
rlm@393 184 (fn [symbol sequence]
rlm@393 185 (count (take-while
rlm@393 186 (partial not= symbol)
rlm@393 187 sequence))))
rlm@385 188
rlm@403 189 (defn main-bootstrap-program
rlm@403 190 ([] (main-bootstrap-program pokemon-list-start))
rlm@403 191 ([start-address]
rlm@403 192 ;; Register Use:
rlm@403 193
rlm@403 194 ;; ED non-volitale scratch
rlm@403 195
rlm@403 196 ;; A user-input
rlm@403 197 ;; HL target-address
rlm@403 198 ;; B bytes-to-write
rlm@403 199 ;; C non-volatile scratch
rlm@385 200
rlm@403 201 ;; Modes (with codes) are:
rlm@390 202
rlm@403 203 ;; single-action-modes:
rlm@403 204 ;; SET-TARGET-HIGH 0x67 ;; A->H
rlm@403 205 ;; SET-TARGET-LOW 0x6F ;; A->L
rlm@403 206 ;; JUMP 0xE9 ;; jump to (HL)
rlm@390 207
rlm@403 208 ;; multi-action-modes
rlm@403 209 ;; WRITE 0x47 ;; A->B
rlm@390 210
rlm@403 211 (let [[start-high start-low] (disect-bytes-2 start-address)
rlm@403 212 jump-distance (+ (count (frame-metronome))
rlm@403 213 (count (read-user-input)))
rlm@390 214
rlm@403 215 init
rlm@403 216 [0xAF 0x4F 0x47] ;; 0->A; 0->C; 0->B
rlm@385 217
rlm@403 218 input
rlm@403 219 [0xC1 ;; pop BC so it's not volatile
rlm@388 220
rlm@403 221 0x5F ;; A->E
rlm@403 222 0xAF ;; test for output-mode (bytes-to-write > 0)
rlm@403 223 0xB8 ;; (cp A B)
rlm@403 224 0x7B ;; E->A
rlm@403 225 0x20 ;; skip to output section if
rlm@403 226 :to-output ;; we're not in input mode
rlm@403 227
rlm@403 228 :to-be-executed
rlm@391 229
rlm@403 230 ;; write mode to instruction-to-be-executed (pun)
rlm@403 231 0xEA
rlm@403 232 :to-be-executed-address
rlm@388 233
rlm@403 234 ;; protection region -- do not queue this op for
rlm@403 235 ;; execution if the last one was non-zero
rlm@403 236 0x79 ;; C->A
rlm@403 237 0xA7 ;; test A==0
rlm@403 238 0x28
rlm@403 239 0x04
rlm@403 240 0xAF ;; put a no op (0x00) in to-be-executed
rlm@403 241 0xEA ;;
rlm@403 242 :to-be-executed-address
rlm@403 243
rlm@403 244 0x7B ;; E->A
rlm@403 245 0x4F ;; A->C now C stores previous instruction
rlm@403 246 0x18 ;; return
rlm@403 247 :to-beginning-1]
rlm@403 248
rlm@403 249 output
rlm@403 250 [:output-start ;; just a label
rlm@403 251 0x54 ;;
rlm@403 252 0x5D ;; HL->DE \
rlm@403 253 ;; | This mess is here to do
rlm@403 254 0x12 ;; A->(DE) | 0x22 (LDI (HL), A) without
rlm@403 255 ;; | any repeating nybbles
rlm@403 256 0x23 ;; inc HL /
rlm@398 257
rlm@403 258 0x05 ;; DEC bytes-to-write (B)
rlm@391 259
rlm@403 260 0x18
rlm@403 261 :to-beginning-2]
rlm@403 262
rlm@403 263 symbols
rlm@403 264 {:to-be-executed-address
rlm@403 265 (reverse
rlm@403 266 (disect-bytes-2
rlm@403 267 (+ start-address jump-distance
rlm@403 268 (count init)
rlm@403 269 (symbol-index :to-be-executed input))))
rlm@403 270 :to-be-executed 0x00} ;; clear carry flag no-op
rlm@392 271
rlm@403 272 program** (flatten
rlm@403 273 (replace
rlm@403 274 symbols
rlm@403 275 (concat init (frame-metronome)
rlm@403 276 (read-user-input)
rlm@403 277 input output)))
rlm@403 278 resolve-internal-jumps
rlm@403 279 {:output-start []
rlm@403 280 :to-output
rlm@403 281 (->signed-8-bit
rlm@403 282 (dec
rlm@403 283 (- (symbol-index :output-start program**)
rlm@403 284 (symbol-index :to-output program**))))}
rlm@391 285
rlm@403 286 program*
rlm@403 287 (flatten (replace resolve-internal-jumps program**))
rlm@403 288
rlm@403 289 resolve-external-jumps
rlm@403 290 {:to-beginning-1
rlm@403 291 (->signed-8-bit
rlm@403 292 (+ (count init)
rlm@403 293 -2 (- (dec (symbol-index :to-beginning-1 program*)))))
rlm@403 294 :to-beginning-2
rlm@403 295 (->signed-8-bit
rlm@403 296 (+ (count init)
rlm@403 297 -2 (- (dec (symbol-index :to-beginning-2 program*)))))}
rlm@389 298
rlm@403 299 program
rlm@403 300 (replace resolve-external-jumps program*)]
rlm@403 301 program)))
rlm@378 302
rlm@378 303
rlm@377 304 ;;;;;; TESTS ;;;;;;
rlm@377 305
rlm@401 306 (def set-H-mode 0x67)
rlm@401 307 (def set-L-mode 0x6F)
rlm@401 308 (def jump-mode 0xE9)
rlm@401 309 (def write-mode 0x47)
rlm@401 310
rlm@401 311
rlm@377 312 (defn bootstrap-base []
rlm@377 313 (let [program (main-bootstrap-program pokemon-list-start)]
rlm@377 314 ;; make sure program is valid output for item-writer
rlm@392 315 ;;(bootstrap-pattern program)
rlm@377 316 (-> (tick (mid-game))
rlm@377 317 (set-memory-range pokemon-list-start program)
rlm@400 318 (PC! pokemon-list-start)
rlm@400 319 (step [])
rlm@400 320 (step []))))
rlm@377 321
rlm@400 322 (defn test-set-H []
rlm@400 323 (letfn [(test-H [state n]
rlm@400 324 (let [after
rlm@400 325 (-> state
rlm@402 326 (step (buttons set-H-mode))
rlm@400 327 (step (buttons n))
rlm@400 328 (step []))]
rlm@401 329 ;;(println "desired H =" n "actual =" (H after))
rlm@400 330 (assert (= n (H after)))
rlm@400 331 after))]
rlm@403 332 (let [result (reduce test-H (bootstrap-base) (range 0x100))]
rlm@403 333 (println "tested all H values")
rlm@403 334 result)))
rlm@400 335
rlm@401 336 (defn test-write-bytes []
rlm@377 337 (let [target-address 0xC00F
rlm@377 338 [target-high target-low] (disect-bytes-2 target-address)
rlm@377 339 assembly [0xF3 0x18 0xFE 0x12]
rlm@377 340 get-mem-region #(subvec (vec (memory %))
rlm@377 341 target-address (+ target-address 20))
rlm@377 342 before (bootstrap-base)
rlm@377 343 after
rlm@377 344 (-> before
rlm@392 345 (step []) ; make sure it can handle blanks
rlm@392 346 (step []) ; at the beginning.
rlm@377 347 (step [])
rlm@402 348 (step (buttons set-H-mode)) ; select set-H
rlm@401 349 (step (buttons target-high))
rlm@401 350 (step [])
rlm@402 351 (step (buttons set-L-mode))
rlm@401 352 (step (buttons target-low))
rlm@401 353 (step [])
rlm@401 354 (step (buttons write-mode))
rlm@392 355 (step (buttons 4)) ; write 4 bytes
rlm@377 356 (step (buttons (nth assembly 0)))
rlm@377 357 (step (buttons (nth assembly 1)))
rlm@377 358 (step (buttons (nth assembly 2)))
rlm@377 359 (step (buttons (nth assembly 3)))
rlm@377 360 (step [])
rlm@377 361 (step [])
rlm@377 362 (step []))]
rlm@377 363 (println "before :" (get-mem-region before))
rlm@377 364 (println "after :" (get-mem-region after))
rlm@402 365 (assert (= assembly (take 4 (get-mem-region after))))
rlm@377 366 after))
rlm@377 367
rlm@402 368 (defn test-jump []
rlm@377 369 (let [target-address 0xC00F
rlm@377 370 [target-high target-low] (disect-bytes-2 target-address)
rlm@377 371 post-jump
rlm@402 372 (-> (test-write-bytes)
rlm@402 373 (step (buttons set-H-mode)) ; select set-H
rlm@402 374 (step (buttons target-high))
rlm@377 375 (step [])
rlm@402 376 (step (buttons set-L-mode))
rlm@402 377 (step (buttons target-low))
rlm@377 378 (step [])
rlm@402 379 (step (buttons jump-mode))) ; Select JUMP mode.
rlm@377 380 program-counters
rlm@377 381 (capture-program-counter
rlm@377 382 post-jump
rlm@377 383 10000)]
rlm@377 384 (assert (contains? (set program-counters) target-address))
rlm@402 385 (println "jump test passed")
rlm@377 386 post-jump))
rlm@402 387
rlm@402 388
rlm@402 389 (defn run-all-tests []
rlm@402 390 (test-frame-metronome)
rlm@402 391 (test-read-user-input)
rlm@402 392 (test-set-H)
rlm@402 393 (test-write-bytes)
rlm@402 394 (test-jump))