rlm@377: (ns com.aurellem.gb.rlm-assembly
rlm@377:   "Version of main bootstrap program that is valid output for the
rlm@377:    item-writer program."
rlm@377:   (:use (com.aurellem.gb gb-driver assembly util vbm constants))
rlm@377:   (:use (com.aurellem.run bootstrap-1))
rlm@377:   (:import [com.aurellem.gb.gb_driver SaveState]))
rlm@377: 
rlm@377: ;; Specs for Main Bootstrap Program
rlm@377: 
rlm@377: ;; Number-Input
rlm@377: ;; Number input works using all eight buttons to
rlm@377: ;;   spell out an 8 bit number.  The order of buttons is
rlm@377: ;;   [:d :u :l :r :start :select :b :a]  -->  11111111
rlm@377: ;;   [      :l    :start            :a]  -->  00101001
rlm@377: 
rlm@377: ;;; MODE-SELECT
rlm@377: ;;   The bootstrap program starts in MODE-SELECT mode.
rlm@377: ;;   MODE-SELECT transitions to one of three modes depending
rlm@377: ;;   on which buttons are pressed:
rlm@377: ;;       0   (no-buttons)  :  MODE-SELECT
rlm@377: ;;       8   [:start]      :  WRITE-BYTES
rlm@377: ;;    0xFF   (all-buttons) :  JUMP
rlm@377: 
rlm@377: ;;; WRITE-BYTES
rlm@377: 
rlm@377: ;;   WRITE-BYTES mode writes sequences of arbitray values to
rlm@377: ;;   arbitray memory locations. It expects you to enter a
rlm@377: ;;   header of three bytes describing what to write:
rlm@377: 
rlm@377: ;;    Byte 0  : Number of Bytes to Write
rlm@377: ;;    Byte 1  : Start Address High Byte
rlm@377: ;;    Byte 1  : Start Address Low  Byte
rlm@377: 
rlm@377: ;;   Then, you enter the number of bytes specified in Byte 0
rlm@377: ;;   they are written to the start address in
rlm@377: ;;   sequence. After the last byte is written control
rlm@377: ;;   returns to MODE-SELECT mode.
rlm@377: 
rlm@377: ;;   Example: to write the sequence [1 2 3 4] starting at
rlm@377: ;;   address 0xC01F enter
rlm@377: ;;    Byte 0  : 4 (will write four bytes)
rlm@377: ;;    Byte 1  : 0xC0  (high byte of 0xC01F)
rlm@377: ;;    Byte 2  : 0x1F  (low  byte of 0xC01F)
rlm@377: ;;    Byte 3  : 1 (write 1 to 0xC01F)
rlm@377: ;;    Byte 4  : 2 (write 2 to 0xC020)
rlm@377: ;;    Byte 5  : 3 (write 3 to 0xC021)
rlm@377: ;;    Byte 6  : 4 (write 4 to 0xC022)
rlm@377: 
rlm@377: ;;; JUMP 
rlm@377: ;;   JUMP mode jumps program control to any arbitray
rlm@377: ;;   location. It expects you to enter two bytes which
rlm@377: ;;   correspond to the high and low bytes of the memory
rlm@377: ;;   address to which you want to jump.
rlm@377: ;;    Byte 0  : Jump Address High Byte
rlm@377: ;;    Byte 1  : Jump Address Low  Byte
rlm@377: 
rlm@377: ;;   Example: to jump to address 0x1234 enter
rlm@377: ;;    Byte 0  : 0x12 (high byte of 0x1234)
rlm@377: ;;    Byte 1  : 0x34 (low  byte of 0x1234)
rlm@377: 
rlm@377: 
rlm@377: 
rlm@377: (defn main-bootstrap-program [start-address]
rlm@377:   (let [[start-high start-low] (disect-bytes-2 start-address)]
rlm@377:     [0xF3 0x18 0xFE]))
rlm@377: 
rlm@377: ;;;;;; TESTS ;;;;;;
rlm@377: 
rlm@377: (defn bootstrap-base []
rlm@377:   (let [program (main-bootstrap-program pokemon-list-start)]
rlm@377:     ;; make sure program is valid output for item-writer
rlm@377:     (bootstrap-pattern program)
rlm@377:     (-> (tick (mid-game))
rlm@377:         (set-memory-range pokemon-list-start program)
rlm@377:         (PC! pokemon-list-start))))
rlm@377: 
rlm@377: (defn test-write-bytes-mode []
rlm@377:   (let [target-address 0xC00F
rlm@377:         [target-high target-low] (disect-bytes-2 target-address)
rlm@377:         assembly [0xF3 0x18 0xFE 0x12]
rlm@377:         get-mem-region  #(subvec (vec (memory %))
rlm@377:                                  target-address (+ target-address 20))
rlm@377:         before (bootstrap-base)
rlm@377:         after
rlm@377:         (-> before
rlm@377:             (step [])                       ; make sure it can handle blanks
rlm@377:             (step [])                       ; at the beginning.
rlm@377:             (step [])                      
rlm@377:             (step [:start])                 ; select WRITE-BYTES mode
rlm@377:             (step (buttons 4))              ; write 4 bytes
rlm@377:             (step (buttons target-high))
rlm@377:             (step (buttons target-low))
rlm@377:             (step (buttons (nth assembly 0)))
rlm@377:             (step (buttons (nth assembly 1)))
rlm@377:             (step (buttons (nth assembly 2)))
rlm@377:             (step (buttons (nth assembly 3)))
rlm@377:             (step [])
rlm@377:             (step [])
rlm@377:             (step []))]
rlm@377:             (println "before :" (get-mem-region before))
rlm@377:             (println "after  :" (get-mem-region after))
rlm@377:             (assert (= assembly (take 4 (get-mem-region after))))
rlm@377:     after))
rlm@377: 
rlm@377: (defn test-jump-mode []
rlm@377:   (let [target-address 0xC00F
rlm@377:         [target-high target-low] (disect-bytes-2 target-address)
rlm@377:         post-jump
rlm@377:         (-> (test-write-bytes-mode)
rlm@377:             (step [])
rlm@377:             (step [])
rlm@377:             (step [])
rlm@377:             (step (buttons 0xFF))           ; Select JUMP mode.
rlm@377:             (step (buttons target-high))
rlm@377:             (step (buttons target-low)))
rlm@377:         program-counters
rlm@377:         (capture-program-counter 
rlm@377:          post-jump
rlm@377:          10000)]
rlm@377:     (println program-counters)
rlm@377:     (assert (contains? (set program-counters) target-address))
rlm@377:     post-jump))