Seibu SPI System

Seibu SPI Motherboard
	Seibu SPI motherboard with cart removed.
Also known as	Seibu SPI System
Developer	Seibu Kaihatsu
CPU	Intel 80386-DX
Graphics	Custom

The Seibu SPI System is Seibu Kaihatsu's custom arcade system board. The Seibu SPI system board uses interchangeable game cartridges, however, each cartridge is region specific, and must be paired with a board of the same region. Seibu SPI boards "update" when a game cartridge is changed. This process takes about 10 minutes to complete, and only has to be performed once after a cart change.

There is also a single-board version of the SPI hardware.

Technical specifications

CPU: Intel 80386-DX 32-bit CISC CPU 25 MHz
- AMD AM386-DX/DXL 25 MHz CPU used on some models
Graphics processor: Custom Seibu graphics hardware
- 240 x 320 pixels
- 6144 colors max
Sound processor: Yamaha YMF271-F (OPX), Zilog Z80 CPU 8 MHz
Storage media: ROM, EPROM

List of Seibu SPI games

Senkyu (Battle Balls)
E-Jan High School
E-Jan Sakurasou
Raiden Fighters
Raiden Fighters 2
Raiden Fighters Jet
Viper Phase 1

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