Mahjong Electron Base

A 28-year-old Arcade Video Game by Dynax, Inc.

Mahjong Electron Base screenshot

Emulated in MAME !

Information for the following ROM(s): mjelctrn mjelct3 mjelct3a mjelctrb mjembase


Mahjong Electron Base © 1990 Dynax.

A classic Mahjong BET game ever with strict score system and function of 'Three Tiles Exchange'. A special effect of Ron or Reach is shown when announced. Play with six girls and wonderful background music.


Main CPU : Zilog Z80 (@ 5.5 Mhz)
Sound Chips : General Instrument AY8910 (@ 2.75 Mhz), YM2413 (@ 3.58 Mhz), OKI MSM5205 (@ 384 Khz)

Screen orientation : Horizontal
Video resolution : 512 x 240 pixels
Screen refresh : 60.00 Hz
Palette colors : 4096

Players : 1


Released in May 1990 in Japan.


Mahjong Electron Base (parts 2 & 3, Japan) is the original issue, clone (parts 2 & 3, alt., Japan) might be an alternative prototype with a fixed payout rate of 50%. Mahjong Electron Base (parts 2 & 4, Japan) is a modified later version with an easier Ron type -'TuiDao Hu'- added, which is shown on the title screen.


When the notice of 'Three Tiles Exchange available' is shown during game, skip it first by pressing the start button. Then play the game normally until the gal throws her last tile out. Keep pressing the 'DonDen' button for almost 40-50 times and 'Three Tiles Exchange available' will appear again. The other two chances of exchange will come after pressing the button 4-6 times each. Attempt to make your whole tile group to match the opponent's last tile after exchange then a Ron of Yakuman can be achieved. It will be easier to fulfil this trick if the girls last tile is forced to be the one expected.

Game's ROM.