This article has a talk page!This page contains notes for the game Bubba 'n' Stix (Genesis).
Useful memory addresses#
Presented as a BizHawk memory watch file. A small handful of them don't seem to have any effect when you change them (e.g. terrain collision flags), while others do make a change, but you won't really see it graphically (e.g. health).
SystemID GEN
00BA90 w b 1 68K RAM Controller
00C4B5 w u 1 68K RAM Selected menu
00C4B3 w u 1 68K RAM Selected sub-menu
00C531 w u 1 68K RAM Selected options BGM
00C533 w u 1 68K RAM Selected options SFX
00C4D2 d h 1 68K RAM Password part 1
00C4D6 d h 1 68K RAM Password part 2
00C4DA w h 1 68K RAM Password part 3
0 S _ 1
00C480 w u 1 68K RAM Current level
00C47C d h 1 68K RAM Score
00F6BC w u 1 68K RAM Continues
00C482 w u 1 68K RAM Lives
00C484 w u 1 68K RAM Health
00C65C w u 1 68K RAM I-frames
00C486 d 3 1 68K RAM Air
00C48A w h 1 68K RAM HUD face
00C5A8 w u 1 68K RAM Time till idle anim
00F64A w u 1 68K RAM Bonus level time
00CCFA w u 1 68K RAM Boss health
0 S _ 1
00C580 d 3 1 68K RAM X last frame
00C584 d 3 1 68K RAM Y last frame
00C612 d 3 1 68K RAM X
00C616 d 3 1 68K RAM Y
00C5C6 d 3 1 68K RAM Speed X
00C658 b b 1 68K RAM Terrain collision direction flags
00C689 b h 1 68K RAM Is hugging wall
00C68D b h 1 68K RAM Is hugging wall
00BABC d 3 1 68K RAM Death respawn X
00BAC0 d 3 1 68K RAM Death respawn Y
0 S _ 1
00BAD0 d 3 1 68K RAM Cam X last frame
00BAD4 d 3 1 68K RAM Cam Y last frame
00BAC8 d 3 1 68K RAM Cam X
00BACC d 3 1 68K RAM Cam Y
00BAE8 d 3 1 68K RAM Cam speed X
00BAEC d 3 1 68K RAM Cam speed Y
0 S _ 1
00BAE4 d 3 1 68K RAM Cam Y?
00BB20 d 3 1 68K RAM Cam Y scroll?
00BB24 d 3 1 68K RAM Cam Y something?
00BADC d 3 1 68K RAM Cam X something?
00BB0C w u 1 68K RAM Cam X refresh something
00BB0E w u 1 68K RAM Cam X refresh col
00B8C8 d 3 1 68K RAM Cam absolute speed X?
00B8C4 d 3 1 68K RAM Absolute speed X ratio
00B8CC d 3 1 68K RAM Camera + movement thing(Source: Espyo)
Semi free-move script#
Presented as a Lua script for emulators like Gens. Hold X and press a direction to move in that direction. It's highly recommended to pause the game and move while the game is paused. Note that the camera will not catch up (horizontally) unless you walk left or right, or (vertically) unless you jump or fall, meaning some places may be impossible to see if you can't move in them.
There is also some code in the script to move the camera alongside Bubba, but it's fairly glitchy, so it's commented out. Y toggles screenshot dumping, which I used to make some maps to help me navigate.
SHOW_COORDS = true
MOVE_CAM = false
X_ADDR = 0xFFC612
Y_ADDR = 0xFFC616
CAM_X_ADDR = 0xFFBAC8
CAM_Y_ADDR = 0xFFBACC
X_LAST_FRAME_ADDR = 0xFFC580
Y_LAST_FRAME_ADDR = 0xFFC584
CAM_X_LAST_FRAME_ADDR = 0xFFBAD0
CAM_Y_LAST_FRAME_ADDR = 0xFFBAD4
MOVE_AMOUNT = 6
take_screenshots = false
y_pressed = false
rendered_frame_x = memory.readword(X_ADDR)
rendered_frame_y = memory.readword(Y_ADDR)
rendered_frame_cam_x = memory.readword(CAM_X_ADDR)
rendered_frame_cam_y = memory.readword(CAM_Y_ADDR)
gui.register( function ()
-- Coordinate drawing.
-- It works a lot better when you make use of the memory addresses dubbed
-- the "last frame" coordinates.
if SHOW_COORDS then
message = string.format("Pos: %d, %d", rendered_frame_x, rendered_frame_y)
gui.text(8, 0, message, "#FFFF00FF", "black")
message = string.format("Cam: %d, %d", rendered_frame_cam_x, rendered_frame_cam_y)
gui.text(8, 12, message, "#FFFF00FF", "black")
end
buttons = joypad.get(1)
-- Free movement with X.
if buttons.X then
if buttons.left then
x = memory.readword(X_ADDR) - MOVE_AMOUNT
memory.writeword(X_ADDR, x)
elseif buttons.right then
x = memory.readword(X_ADDR) + MOVE_AMOUNT
memory.writeword(X_ADDR, x)
end
if buttons.up then
y = memory.readword(Y_ADDR) - MOVE_AMOUNT
memory.writeword(Y_ADDR, y)
elseif buttons.down then
y = memory.readword(Y_ADDR) + MOVE_AMOUNT
memory.writeword(Y_ADDR, y)
end
if MOVE_CAM then
if buttons.left then
cam_x = memory.readword(CAM_X_ADDR) - MOVE_AMOUNT
memory.writeword(CAM_X_ADDR, cam_x)
elseif buttons.right then
cam_x = memory.readword(CAM_X_ADDR) + MOVE_AMOUNT
memory.writeword(CAM_X_ADDR, cam_x)
end
if buttons.up then
cam_y = memory.readword(CAM_Y_ADDR) - MOVE_AMOUNT
memory.writeword(CAM_Y_ADDR, cam_y)
elseif buttons.down then
cam_y = memory.readword(CAM_Y_ADDR) + MOVE_AMOUNT
memory.writeword(CAM_Y_ADDR, cam_y)
end
end
end
-- Toggle screenshot dumping with Y.
if buttons.Y and not y_pressed then
take_screenshots = not take_screenshots
message = string.format("Screenshot dumping: %s", tostring(take_screenshots))
print(message)
end
y_pressed = buttons.Y
-- Dump screenshots for map-making purposes.
if take_screenshots then
frames = gens.framecount()
if frames > 0 and (frames % 15) == 0 then
file_name = string.format("Map_screenshots\\%d_%d.gd", rendered_frame_cam_x, rendered_frame_cam_y)
file = io.open(file_name, 'w')
io.output(file)
io.write(gui.gdscreenshot())
io.close(file)
end
end
-- Update coordinate stuff.
rendered_frame_x = memory.readword(X_LAST_FRAME_ADDR)
rendered_frame_y = memory.readword(Y_LAST_FRAME_ADDR)
rendered_frame_cam_x = memory.readword(CAM_X_LAST_FRAME_ADDR)
rendered_frame_cam_y = memory.readword(CAM_Y_LAST_FRAME_ADDR)
end)(Source: Espyo)