Open Mahjong (Japan) - mame (0280) machine

MAME: 0280 - Released: 2025-08-29T22:26:57 - Lists: 731 - Software: 139884 - rom: 235974 - disk: 11384

machine

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name	sourcefile	sampleof	isbios	isdevice	ismechanical	runnable	description	year	manufacturer	cloneof	romof
openmj	dynax/royalmah.cpp		no	no	no	yes	Open Mahjong (Japan)	1981?	Sapporo Mechanic	royalmj	royalmj

display

tag	type	rotate	width	height	refresh	pixclock	htotal	hbend	hbstart	vtotal	vbend	vbstart	flipx
screen	raster	0	256	240	60.000000								no

driver

status	emulation	savestate	requiresartwork	unofficial	nosoundhardware	incomplete	cocktail
good	good	unsupported	no	no	no	no

rom

name	size	crc	sha1	region	offset	status	optional	merge	bios
10	8192	4042920e	19753bcb27ebf391ab824a45c6e41d956826a263	maincpu	0	good	no
20	8192	8fa0f735	645154d51c0679b953b9ffc2f1d3b8f2752a0796	maincpu	2000	good	no
30	8192	00045cd7	0c32995753c1da14dacc8bc6c12dbcbdcae4e1b0	maincpu	4000	good	no
82s123.prm	32	d3007282	e4d863ab193e49208ed0f59dcddb1da0492314f6	proms	0	good	no	18s030n.6k

chip

type	tag	name	clock
cpu	maincpu	Zilog Z80	3072000
audio	speaker	Speaker
audio	aysnd	AY-3-8910A PSG	1536000

device_ref

name
z80
nvram
palette
screen
speaker
ay8910

sound

channels
1

input

players	coins	service	tilt
2	3	yes	no

control

type	player	buttons	ways	reverse	minimum	maximum	sensitivity	keydelta	ways2	ways3	reqbuttons
mahjong	1	26		no
gambling	1	1		no
mahjong	2	26		no

port, analog

port_tag	analog_masks
:DSW1
:KEY0
:KEY1
:KEY2
:KEY3
:KEY4
:KEY5
:KEY6
:KEY7
:KEY8
:KEY9
:SYSTEM

dipswitch

Pay Out Rate

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Pay Out Rate	DSW1	15

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
96%	15	yes
93%	14	no
90%	13	no
87%	12	no
84%	11	no
81%	10	no
78%	9	no
75%	8	no
71%	7	no
68%	6	no
65%	5	no
62%	4	no
59%	3	no
56%	2	no
53%	1	no
50%	0	no

Maximum Bet

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Maximum Bet	DSW1	48

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
1	0	no
5	16	no
10	32	no
20	48	yes

Unused

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Unused	DSW1	64

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
Off	0	yes
On	64	no

Unused

name	tag	mask	condition_tag	condition_mask	condition_relation	condition_value
Unused	DSW1	128

value

name	value	default	condition_tag	condition_mask	condition_relation	condition_value
Off	0	yes
On	128	no