Pro Yakyuu World Stadium '90 - Gekitouhan

Namco System 1 hardware
Game ID : W90

Main CPU : Motorola M6809 (@ 1.536 Mhz)
Sub CPU : Motorola M6809 (@ 1.536 Mhz)
Sound CPU : Motorola M6809 (@ 1.536 Mhz)
MCU : HD63701 (@ 1.536 Mhz)
Sound Chips : Yamaha YM2151 (@ 3.57958 Mhz), Namco advanced 8-channel stereo WSG, stereo DAC

Screen orientation : Horizontal
Video resolution : 288 x 224 pixels
Screen refresh : 60.61 Hz
Palette colors : 24-bit RGB palette

Players : 2
Control : 8-way joystick
Buttons : 2

Released in July 1990.

The title of this game translates from Japanese as 'Pro Baseball World Stadium '90 - Fierce Fighting Version'.