Pokémon mini/Memory Map

The common memory space for the Pokemon mini.

Broadly

• 000000-000FFF (001000) = Internal BIOS
• 001000-001FFF (001000) = PM RAM
• 002000-0020FF (000100) = Hardware Registers
• 002100-1FFFFF (1FDF00) = Cartridge Memory
• After this is mirrored versions of the content

RAM

Depending on how activated the Program Rendering Chip (PRC) is, this amount of memory it uses can be a different size. The PRC can have sprites and tiles separately enabled and tiles have multiple size options (for use with scrolling). Additionally, the PRC can be enabled to simply copy a buffer and not manage the buffer itself. Thus it can have one of the following schemata:

Sprites enabled and tile mode 0-2

Tile modes: 0 (12x16), 1 (16x12), or 2 (24x8)

• 1000-12FF (0300) = Frame Buffer
• 1300-135F (0060) = Sprite Attributes
• 1360-141F (00C0) = Tile Map
• 1420-1FFF (0BE0) = General Purpose Memory

Sprites enabled and tile mode 3

Tile mode 3 is 24x16

• 1000-12FF (0300) = Frame Buffer
• 1300-135F (0060) = Sprite Attributes
• 1360-14DF (0180) = Tile Map
• 14E0-1FFF (0B20) = General Purpose Memory

Sprites enabled and tiles disabled

• 1000-12FF (0300) = Frame Buffer
• 1300-135F (0060) = Sprite Attributes
• 1360-1FFF (0CA0) = General Purpose Memory

PRC set to copy only

• 1000-12FF (0300) = Frame Buffer
• 1300-1FFF (0D00) = General Purpose Memory

PRC disabled

• 1000-1FFF (1000) = General Purpose Memory

Sprite Attributes

Byte offset & bit mask of relevant bits (in hex). Note that the sprite position extends left and above by one sprite length, such that any sprite placed with an X of 0 or a Y of 0 will not be displayed on the screen.

• 00 & 7f = X position
• 01 & 7f = Y position
• 02 & ff = Index in spriteset
• 03 & 08 = Enabled
• 03 & 04 = Color inverted
• 03 & 02 = Vertically flipped
• 03 & 01 = Horizontally flipped

Registers

See here.

Cartridge Memory

• 2100-2101 (0002) = PM marker
• 2102-2107 (0006) = Reset Location
• 2108-210d (0006) = PRC Frame Copy IRQ
• 210e-2113 (0006) = PRC Render IRQ
• 2114-2119 (0006) = Timer 2 Underflow (upper) IRQ
• 211a-211f (0006) = Timer 2 Underflow (lower) IRQ
• 2120-2125 (0006) = Timer 1 Underflow (upper) IRQ
• 2126-212b (0006) = Timer 1 Underflow (lower) IRQ
• 212c-2131 (0006) = Timer 3 Underflow (upper) IRQ
• 2132-2137 (0006) = Timer 3 Comparator IRQ
• 2138-213d (0006) = 32hz Timer (256hz linked) IRQ
• 213e-2143 (0006) = 8hz Timer (256hz linked) IRQ
• 2144-2149 (0006) = 2hz Timer (256hz linked) IRQ
• 214a-214f (0006) = 1hz Timer (256hz linked) IRQ
• 2150-2155 (0006) = IR Receiver IRQ
• 2156-215b (0006) = Shake Sensor IRQ
• 215c-2161 (0006) = Power Key IRQ
• 2162-2167 (0006) = Right Key IRQ
• 2168-216d (0006) = Left Key IRQ
• 216e-2173 (0006) = Down Key IRQ
• 2174-2179 (0006) = Up Key IRQ
• 217a-217f (0006) = C Key IRQ
• 2180-2185 (0006) = B Key IRQ
• 2186-218b (0006) = A Key IRQ
• 218c-2191 (0006) =
• 2192-2197 (0006) =
• 2198-219d (0006) =
• 219e-21a3 (0006) = Cartridge IRQ
• 21a4-21ab (0008) = NINTENDO in plain text (required to boot)
• 21ac-21af (0004) = Game Code
• 21b0-21bb (000c) = Game Title (zero-padded)
• 21bc-21bd (0002) = 2P (Unknown purpose)
• 21be-21cf (0012) = Reserved (Zero)
• After this is general purpose ROM