PM_Memory

The Pokemon Mini has a 24-bit internal addressing bus. The entire bus is decoded, and thus nothing mirrors except cartridge memory. Externally, the cartridge bus is only 21 bits wide, so anything at or past $20000 is guaranteed to be a mirror of cartridge memory.

Start	End	Size	Description
$000000	$000FFF	$001000 (4KB)	Internal BIOS
$001000	$001FFF	$001000 (4KB)	PM RAM
$002000	$0020FF	$000100 (256B)	Hardware Registers
$002100	$1FFFFF	$1FDF00 (~2MB)	Cartridge Memory
$200000	$3FFFFF	$200000 (2MB)	Cartridge Memory (Mirror)
$400000	$5FFFFF	$200000 (2MB)	Cartridge Memory (Mirror)
$600000	$7FFFFF	$200000 (2MB)	Cartridge Memory (Mirror)
$800000	$9FFFFF	$200000 (2MB)	Cartridge Memory (Mirror)
$A00000	$BFFFFF	$200000 (2MB)	Cartridge Memory (Mirror)
$C00000	$DFFFFF	$200000 (2MB)	Cartridge Memory (Mirror)
$E00000	$FFFFFF	$200000 (2MB)	Cartridge Memory (Mirror)

Pokemon Mini Memory Map