Dragon Quest III (SNES)/RAM map

The following article is a RAM map for Dragon Quest III (SNES).

Main

Category	Address	Size	Description
Stats	$7e3696	long	Current amount of Gold
Bag	$7e3725-$7e3824	256 bytes	Each byte is which item is in bag slot, 0 means empty, game uses values $01-$e4
Bag	$7e3825-$7e3924	256 bytes	Each byte is amount of the item in the bag slot, game allows up to 99
Joypad	$7e7ff8	word	Joypad Buttons - registers $4218 and $4219 are read and stored here
Stats	$7e3926-$7e3928	long	Hero's XP
Stats	$7e3929-$7e392a	word	Hero's max HP
Stats	$7e392b-$7e392c	word	Hero's current HP
Stats	$7e392d-$7e392e	word	Hero's max MP
Stats	$7e392f-$7e3930	word	Hero's current MP
Stats	$7e3931	byte	Hero's strength
Stats	$7e3932	byte	Hero's agility
Stats	$7e3933	byte	Hero's stamina
Stats	$7e3934	byte	Hero's wisdom
Stats	$7e3935	byte	Hero's luck
Stats	$7e393b-$7e393f	5 bytes	Hero's name, 4 characters max followed by $ac (end of string)

VBLANK State Machine

The whole graphics state is set every VBLANK interrupt. This is also where VRAM DMA transfers are scheduled.

Category	Address	Size	Description
Graphics Settings	$7e7f8a	byte	$2101 - OAM object size and object base
Graphics Settings	$7e7f8c	byte	$2105 - BG mode and BG character size
Graphics Settings	$7e7f8e	byte	$2106 - Mosaic size and mosaic enable
Graphics Settings	$7e7f90	byte	$2107 - BG 1 screen base and screen size
Graphics Settings	$7e7f92	byte	$2108 - BG 2 screen base and screen size
Graphics Settings	$7e7f94	byte	$2109 - BG 3 screen base and screen size
Graphics Settings	$7e7f96	byte	$210a - BG 4 screen base and screen size
Graphics Settings	$7e7f98	byte	$210b - BG 1 & 2 tile base addresses
Graphics Settings	$7e7f9a	byte	$210c - BG 3 & 4 tile base addresses
Graphics Settings	$7e7fba	byte	$2123 - Window mask setting, BG 1 & 2
Graphics Settings	$7e7fbc	byte	$2124 - Window mask setting, BG 3 & 4
Graphics Settings	$7e7fbe	byte	$2125 - Window mask setting, OBJ
Graphics Settings	$7e7fc0	byte	$2126 - Window 1 left position
Graphics Settings	$7e7fc1	byte	$2127 - Window 1 right position
Graphics Settings	$7e7fc2	byte	$2128 - Window 2 left position
Graphics Settings	$7e7fc3	byte	$2129 - Window 2 right position
Graphics Settings	$7e7fc4	byte	$212a - Window 1/2 mask logic, BG 1-4
Graphics Settings	$7e7fc6	byte	$212b - Window 1/2 mask logic, MATH and OBJ
Graphics Settings	$7e7fc8	byte	$212c - Main screen designation
Graphics Settings	$7e7fca	byte	$212d - Sub screen designation
Graphics Settings	$7e7fcc	byte	$212e - Window area main screen disable
Graphics Settings	$7e7fce	byte	$212f - Window area sub screen disable
Graphics Settings	$7e7fd0	byte	$2130 - Color math control A
Graphics Settings	$7e7fd2	byte	$2131 - Color math control B
Graphics Settings	$7e7fd4	word	$2132 - Color math sub screen backdrop color, RGB intensities stored as 0bbbbbgggggrrrrr
Graphics Settings	$7e7fda	byte	$2133 - Screen mode/video select
Graphics Loading	$7e8bae - $7e8dad	$100 words	$4302 - DMA source addresses
Graphics Loading	$7e8dae - $7e8fad	$100 words but only uses low byte	$4304 - DMA source address banks
Graphics Loading	$7e8fae - $7e91ad	$100 words	$2116 - VRAM destination addresses
Graphics Loading	$7e91ae - $7e93ad	$100 words	$4305 - DMA transfer sizes
Graphics Loading	$7e93ae	byte	Number of DMA transfers to perform (indexes the preceding arrays)
Graphics Loading	$7faeea - $7fb0e9	$100 words	Tile indexes, which tiles to copy, used to fill the DMA copy scheduler data in $7e8bae - $7e93ae