Mahjong Vegas 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 Vegas (Dynax, 1991)

Memory Area:dondenmj_iomap

Address Range

Length

Function

Description

0x0001

Device Read

aysnd, ay8910_device, data_r

0x0002-0x0003

Device Write

aysnd, ay8910_device, data_address_w

0x0010

Read Port, Write

DSW1, royalmah_palbank_w

0x000f	96%	Active High
0x000e	93%	Active High
0x000d	90%	Active High
0x000c	87%	Active High
0x000b	84%	Active High
0x000a	81%	Active High
0x0009	78%	Active High
0x0008	75%	Active High
0x0007	71%	Active High
0x0006	68%	Active High
0x0005	65%	Active High
0x0004	62%	Active High
0x0003	59%	Active High
0x0002	56%	Active High
0x0001	53%	Active High
0x0000	50%	Active High
0x0030	1 2 4 8 12 16 24 32	Active High
0x0000	1 2 3 5 8 15 30 50	Active High
0x0010	1 2 3 5 10 25 50 100	Active High
0x0020	1 2 3 5 10 50 100 200	Active High
0x00c0	1	Active High
0x0080	5	Active High
0x0040	10	Active High
0x0000	20	Active High

0x0011

Read Port, Write

SYSTEM, input_port_select_w

0x0085

Read Port

DSW2 (// DSW2)

0x0003	1C_1C	Active High
0x0002	1C_2C	Active High
0x0001	1C_5C	Active High
0x0000	1 Coin/10 Credits	Active High
0x000c	1	Active High
0x0008	2	Active High
0x0004	3	Active High
0x0000	5	Active High
0x0070	Cut	Active High
0x0060	100?	Active High
0x0050	300	Active High
0x0040	500	Active High
0x0030	700	Active High
0x0020	1000	Active High
0x0010	1000	Active High
0x0000	1000	Active High
0x0000	1	Active High
0x0080	2	Active High

0x0086

Read Port

DSW3 (// DSW3)

0x0001	Off	Active High
0x0000	On	Active High
0x0002	Off	Active High
0x0000	On	Active High
0x0004	Off	Active High
0x0000	On	Active High
0x0008	Off	Active High
0x0000	On	Active High
0x0010	Off	Active High
0x0000	On	Active High
0x0020	Off	Active High
0x0000	On	Active High
0x0040	Off	Active High
0x0000	On	Active High
0x0080	Off	Active High
0x0000	On	Active High

0x0087

Write

dynax_bank_w

Memory Area:mjderngr_iomap

Address Range

Length

Function

Description

0x0001

Device Read

aysnd, ay8910_device, data_r

0x0002-0x0003

Device Write

aysnd, ay8910_device, data_address_w

0x0010

Write

mjderngr_coin_w (// palette bank is set separately)

0x0011

Read Port, Write

SYSTEM, input_port_select_w

0x0020

Write

dynax_bank_w

0x0040

Read Port

DSW2

0x0003	1C_1C	Active High
0x0002	1C_2C	Active High
0x0001	1C_5C	Active High
0x0000	1 Coin/10 Credits	Active High
0x000c	1	Active High
0x0008	2	Active High
0x0004	3	Active High
0x0000	5	Active High
0x0070	Cut	Active High
0x0060	100?	Active High
0x0050	300	Active High
0x0040	500	Active High
0x0030	700	Active High
0x0020	1000	Active High
0x0010	1000	Active High
0x0000	1000	Active High
0x0000	1	Active High
0x0080	2	Active High

0x004C

Read Port

DSW1

0x000f	96%	Active High
0x000e	93%	Active High
0x000d	90%	Active High
0x000c	87%	Active High
0x000b	84%	Active High
0x000a	81%	Active High
0x0009	78%	Active High
0x0008	75%	Active High
0x0007	71%	Active High
0x0006	68%	Active High
0x0005	65%	Active High
0x0004	62%	Active High
0x0003	59%	Active High
0x0002	56%	Active High
0x0001	53%	Active High
0x0000	50%	Active High
0x0030	1 2 4 8 12 16 24 32	Active High
0x0000	1 2 3 5 8 15 30 50	Active High
0x0010	1 2 3 5 10 25 50 100	Active High
0x0020	1 2 3 5 10 50 100 200	Active High
0x00c0	1	Active High
0x0080	5	Active High
0x0040	10	Active High
0x0000	20	Active High

0x0060

Write

mjderngr_palbank_w

Memory Area:mjvegasa_iomap

Address Range	Length	Function	Description
0x0000	1	Write	mjvegasa_p4_w
0x0000	1	Read/Write	mjtensin_p3_r, mjvegasa_p3_w

Memory Area:mjvegasa_map

Address Range	Length	Function	Description
0x0000-0x5FFF	24576	ROM
0x6000-0x7FFF	8192	RAM, Shared	nvram
0x8000-0xFFFF	32768	Read/Write, Shared	mjvegasa_rom_io_r, mjvegasa_rom_io_w, videoram
0x10001	1	Device Read	aysnd, ay8910_device, data_r
0x10002-0x10003	2	Device Write	aysnd, ay8910_device, data_address_w
0x10010	1	Write	mjvegasa_coin_counter_w
0x10011	1	Read Port, Write	SYSTEM, input_port_select_w
0x10013	1	Write	input_port_select_w
0x12000	1	Write	mjvegasa_rombank_w
0x12100	1	Read	cafetime_dsw_r
0x12200	1	Write	cafetime_dsw_w
0x12300	1	Write	mjderngr_palbank_w
0x12400	1	Write	mjvegasa_12400_w
0x12500	1	Read	mjvegasa_12500_r

Memory Area:royalmah_iomap

Address Range

Length

Function

Description

0x0001

Device Read

aysnd, ay8910_device, data_r

0x0002-0x0003

Device Write

aysnd, ay8910_device, data_address_w

0x0010

Read Port, Write

DSW1, royalmah_palbank_w

0x000f	96%	Active High
0x000e	93%	Active High
0x000d	90%	Active High
0x000c	87%	Active High
0x000b	84%	Active High
0x000a	81%	Active High
0x0009	78%	Active High
0x0008	75%	Active High
0x0007	71%	Active High
0x0006	68%	Active High
0x0005	65%	Active High
0x0004	62%	Active High
0x0003	59%	Active High
0x0002	56%	Active High
0x0001	53%	Active High
0x0000	50%	Active High
0x0030	1 2 4 8 12 16 24 32	Active High
0x0000	1 2 3 5 8 15 30 50	Active High
0x0010	1 2 3 5 10 25 50 100	Active High
0x0020	1 2 3 5 10 50 100 200	Active High
0x00c0	1	Active High
0x0080	5	Active High
0x0040	10	Active High
0x0000	20	Active High

0x0011

Read Port, Write

SYSTEM, input_port_select_w

Memory Area:royalmah_map

Address Range	Length	Function	Description
0x0000-0x6FFF	28672	ROM, Write	royalmah_rom_w
0x7000-0x7FFF	4096	RAM, Shared	nvram
0x8000-0xFFFF	32768	ROM Bank	bank1 (// banked ROMs not present in royalmah)
0x8000-0xFFFF	32768	Write Only, Shared	videoram

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:maincpu

Address Range	Length	Label/Location	Description
0x0000-0x1FFFF	131072	5040.1b	CRC(c4f03128) (Fluke: CCD5)
0x210000-0x28FFFF	524288	5002.1d	CRC(016c0a32) (Fluke: 08AB)
0x210000-0x28FFFF	524288	5002.1d	CRC(016c0a32) (Fluke: 08AB)
0x2F0000-0x30FFFF	131072	5003.1e	CRC(5323cc85) (Fluke: 6519)
0x2F0000-0x30FFFF	131072	5003.1e	CRC(5323cc85) (Fluke: 6519)

Memory Area:proms

Address Range	Length	Label/Location	Description
0x0000-0x01FF	512	d50-2_82s147.4h	CRC(3c960ea2) (Fluke: 065A)
0x0000-0x01FF	512	d50-2_82s147.4h	CRC(3c960ea2) (Fluke: 065A)
0x0200-0x03FF	512	d50-1_82s147.4g	CRC(50c0d0ec) (Fluke: A671)
0x0200-0x03FF	512	d50-1_82s147.4g	CRC(50c0d0ec) (Fluke: A671)