Idol no Himitsu © 1989 Digital Soft.
A medal mahjong game.
Main CPU : Zilog Z80 (@ 5 Mhz)
Sound Chips : General Instrument AY8910 (@ 1.25 Mhz), DAC
Screen orientation : Horizontal
Video resolution : 512 x 224 pixels
Screen refresh : 60.00 Hz
Palette colors : 4096
Player : 2
Control : mahjong keyboard
Released in March 1989.
The title of this game translates from Japanese as 'Idol's Secret'.