Mahjong Lemon Angel Memory Map

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Memory Map

The following is a memory map that was generated based on the MAME source code (.180). This information is only as accurate as the MAME driver is. If you see any errors, please let me know what that error is.

The Memory Area is related to where the information is from (CPU, Sound Board, etc..), and it may also reflect what it has in common with other hardware.

Mahjong Lemon Angel (Home Data, 1990)

Memory Area:pteacher_map

Address Range	Length	Function	Description
0x0000-0x3FFF	16384	RAM Write, Shared	mrokumei_videoram_w, videoram
0x4000-0x5EFF	7936	RAM
0x5F00-0x5FFF	256	RAM
0x6000-0x6FFF	4096	RAM	(/* work ram */)
0x7800	1	RAM	(/* behaves as normal RAM */)
0x7801	1	Read	pteacher_io_r (// vblank, visible page)
0x7FF0-0x7FFD	14	Write Only, Shared	vreg
0x7FF2	1	Read	pteacher_snd_r
0x7FFF	1	Write	pteacher_blitter_start_w
0x8000	1	Write	bankswitch_w
0x8000-0xBFFF	16384	ROM Bank	bank1
0x8002	1	Write	pteacher_snd_command_w
0x8005	1	Write	pteacher_blitter_bank_w
0x8006	1	Write	homedata_blitter_param_w
0x8007	1	Write	pteacher_gfx_bank_w
0xC000-0xFFFF	16384	ROM

Memory Area:pteacher_upd7807_io_map

Address Range	Length	Function	Description
0x0000	1	Read/Write	pteacher_upd7807_porta_r, pteacher_upd7807_porta_w
0x0000	1	Device Write	dac, dac_byte_interface, write
0x0000	1	Read Port, Write	COIN, pteacher_upd7807_portc_w
0x0000	1	Read	pteacher_keyboard_r

Memory Area:pteacher_upd7807_map

Address Range	Length	Function	Description
0x0000	1	Write	pteacher_snd_answer_w
0x0000-0xFEFF	65280	ROM Bank	bank2 (/* External ROM (Banked) */)
0xFF00-0xFFFF	256	RAM	(/* Internal RAM */)

ROM Map for this game

This is the ROM map for the game. This should tell you what address the ROM is at, how big it is, what it's used for.

Memory Area:audiocpu

Address Range	Length	Label/Location	Description
0x0000-0x3FFFF	262144	x02a02.9g	CRC(e9aa8c80) (Fluke: 95EE)

Memory Area:maincpu

Address Range	Length	Label/Location	Description
0x10000-0x1BFFF	49152	x02_d01.16e	CRC(4c2fae05) (Fluke: F2E2)

Memory Area:user1

Address Range	Length	Label/Location	Description
0x0000-0x3FFFF	262144	x02a03.12e	CRC(02ef0378) (Fluke: A0A2)