Kwirk

This page contains notes for the game Kwirk.

Unrandomized Heading Out? mode#

This is the code responsible.

  0x05ef  af      xor a
  0x05f0  ea3acf  ld [0xcf3a], a
  0x05f3  ea45cf  ld [floor_schedule_preinitialized], a  ; Zero the "preinitialized" flag at 0xcf45.
  0x05f6  fab8c2  ld a, [game_mode]
  0x05f9  fe01    cp 0x01                  ; Heading Out? mode?
  0x05fb  2009    jr nZ, skip_code_check   ; If not, don't check for the code.
  0x05fd  f08b    ld a, [joypad_input]
  0x05ff  e624    and 0x24
  0x0601  fe24    cp 0x24                  ; Left and Select pressed?
  0x0603  cca93e  call Z, heading_out_fixed_floor_schedule  ; If so, use a fixed floor schedule.
skip_code_check:
  0x0606  af      xor a

heading_out_fixed_floor_schedule:
  0x3ea9  af      xor a
  0x3eaa  ea74c3  ld [num_floors_completed], a
  0x3ead  3e28    ld a, 40
  0x3eaf  ea45cf  ld [floor_schedule_preinitialized], a  ; Set a flag to prevent randomization of floor schedule.
  0x3eb2  cdc93e  call  heading_out_num_floors_for_skill_level
          ; a = number of floors in Heading Out? before this skill level
          ; b = number of floors in this skill level
  0x3eb5  c61e    add 30                   ; Add 30 to account for the 30 floors of Going Up? mode.
  0x3eb7  eabfc2  ld [current_floor], a
  0x3eba  78      ld a, b
  0x3ebb  eab9c2  ld [num_floors], a
  0x3ebe  2111c3  ld hl, heading_out_floor_schedule  ; Array of floors that will be played.
  0x3ec1  3e1e    ld a, 30                 ; Fill the schedule incrementally starting from 30.
next:
  0x3ec3  22      ldi [hl], a
  0x3ec4  3c      inc a
  0x3ec5  05      dec b
  0x3ec6  20fb    jr nZ, next
  0x3ec8  c9      ret

Careful Movement Mode#

  0x10e5  fa43cf  ld a, [in_demo]
  0x10e8  a7      and a
  0x10e9  c26970  jp nZ, direction_inputs  ; If playing the demo, don't read hardware buttons.
  0x10ec  cdd20f  call wait_for_vblank_flag
  0x10ef  cd452b  call read_joypad
  0x10f2  c5      push bc
  0x10f3  cde410  call noop
  0x10f6  c1      pop bc
  0x10f7  f08b    ld a, [joypad_input]
  0x10f9  e6f0    and 0xf0                 ; Any of Up, Down, Left, or Right pressed?
  0x10fb  2004    jr nZ, direction_inputs
  0x10fd  af      xor a                    ; If no directions are pressed, clear careful movement flag.
  0x10fe  ea47cf  ld [disable_direction_autorepeat], a
direction_inputs:
  0x1101  cb7f    bit 7, a                 ; Down pressed?

  0x120f  f08b    ld a, [joypad_input]
  0x1211  cb4f    bit 1, a                 ; B pressed?
  0x1213  280d    jr Z, play_movement_sound
  0x1215  fa47cf  ld a, [disable_direction_autorepeat]
  0x1218  a7      and a                    ; If B is pressed, is autorepeat disabled from the last move?
  0x1219  2802    jr Z, set_autorepeat_flag
  0x121b  1833    jr finish_move           ; If so, don't actually move.
set_autorepeat_flag:
  0x121d  3e01    ld a, 0x01               ; Set the flag to disable autorepeat for the next move, if B is pressed then.
  0x121f  ea47cf  ld [disable_direction_autorepeat], a
play_movement_sound:
  0x1222  fa43cf  ld a, [in_demo]