Mahjong Doukyuusei Special 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 Doukyuusei Special (Make Software / Elf / Media Trading, 1995)

Memory Area:dokyusp_map

Address Range	Length	Function	Description
0x0000-0x3FFFF	262144	ROM	(// ROM)
0x200000-0x21FFFF	131072	RAM Write, Shared	metro_vram_0_w, vram_0 (// Layer 0)
0x220000-0x23FFFF	131072	RAM Write, Shared	metro_vram_1_w, vram_1 (// Layer 1)
0x240000-0x25FFFF	131072	RAM Write, Shared	metro_vram_2_w, vram_2 (// Layer 2)
0x260000-0x26FFFF	65536	Read	metro_bankedrom_r (// Banked ROM)
0x270000-0x271FFF	8192	RAM	(// ???)
0x272000-0x273FFF	8192	RAM Device Write, Shared	palette, palette_device, write, palette (// Palette)
0x274000-0x274FFF	4096	RAM, Shared	spriteram (// Sprites)
0x278000-0x2787FF	2048	RAM, Shared	tiletable (// Tiles Set)
0x27880E-0x27880F	2	RAM, Shared	screenctrl (// Screen Control)
0x278810-0x27881F	16	Write Only, Shared	irq_levels (// IRQ Levels)
0x278820-0x27882F	16	Write Only, Shared	irq_vectors (// IRQ Vectors)
0x278830-0x278831	2	Write Only, Shared	irq_enable (// IRQ Enable)
0x278832-0x278833	2	Read/Write	metro_irq_cause_r,metro_irq_cause_w (// IRQ Cause / IRQ Acknowledge)
0x278836-0x278837	2	Device Write	watchdog, watchdog_timer_device, reset16_w
0x278840-0x27884D	14	Write, Shared	metro_blitter_w, blitter_regs (// Tiles Blitter)
0x278850-0x27885B	12	Write Only, Shared	scroll (// Scroll Regs)
0x278860-0x27886B	12	Write, Shared	metro_window_w, window (// Tilemap Window)
0x278870-0x278871	2	Write Only, Shared	rombank (// Rom Bank)
0x278880-0x278881	2	Read	gakusai_input_r (// Inputs)
0x278882-0x278883	2	Read Port	IN0 (//)
0x278888-0x278889	2	Write Only, Shared	input_sel (//)
0x279700-0x279713	20	Write Only, Shared	videoregs (// Video Registers)
0x400000-0x400001	2	Write NOP	(// ? 5)
0x500000-0x500001	2	Write	gakusai_oki_bank_lo_w (// Sound)
0x600000-0x600003	4	Device Write 8-bit	ymsnd, ym2413_device, write, 0x00ff
0x700000-0x700001	2	Device Read/Write 8-bit	oki, okim6295_device, read, write, 0x00ff (// Sound)
0xC00000-0xC00001	2	Write	dokyusp_eeprom_reset_w (// EEPROM)
0xD00000-0xD00001	2	Read/Write	dokyusp_eeprom_r, dokyusp_eeprom_bit_w (// EEPROM)
0xF00000-0xF0FFFF	65536	RAM, Mirror	0x0f0000 (// RAM (mirrored))

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:oki

Address Range	Length	Label/Location	Description
0x0000-0x1FFFFF	2097152	7.bin	CRC(763985e1) (Fluke: 3B66)