Super Accelerator 1



The Super Accelerator 1 chip, shortened to the SA1 chip is a co-processor included in select Super Nintendo Entertainment System (SNES) video games, primarily used to improve the performance of several games; developed by Nintendo, it is based on an upgraded WDC 65C816 CPU with triple the processing speed.

Hardware
The SA1 chip is based on the WDC 65C816 CPU, which is similar in hardware to the Ricoh 5A22 CPU which present inside the Super Nintendo, with several programmable timers. Unlike other hardware chips, the SA1 chip doesn't function as a slave CPU, meaning both can run simultaneously together. In addition, the CPU had a 10.74 MHz clock speed, which was three times the standard Super Nintendo CPU speed; RAM was also improved in speed with an additional 2 kilobytes of internal RAM.

Alongside the improved clock speed, the SA1 could also handle memory mapping and can store additional data, and compress said data. Additional direct memory access (DMA) modes could be used, most notably bitmap to bit plane transferring. Arithmetic functions were included and a hardware timer with two modes, a 18-bit linear timer and a synchronised PPU timer.

List of games

 * Asahi Shinbun Rensai: Katou Ichi-Ni-San Shougi: Shingiryuu
 * Daisenryaku Expert WWII: War in Europe
 * Derby Jockey 2
 * Dragon Ball Z: Hyper Dimension
 * Habu Meijin no Omoshiro Shōgi
 * Hayashi Kaihou Kudan no Igo Oodou
 * Itoi Shigesato no Bass Tsuri No. 1
 * J.League '96 Dream Stadium
 * Jikkyou Oshaberi Parodius
 * Jumpin' Derby
 * Kakinoki Shogi
 * Kirby Super Star
 * Kirby's Dream Land 3
 * Marvelous: Mouhitotsu no Takarajima
 * Masters New: Haruka Naru Augusta 3
 * Mini 4WD Shining Scorpion Let's & Go!!
 * Pebble Beach no Hotou: New Tournament Edition
 * Pachi-Slot Monogatari - PAL Kougyou Special
 * PGA European Tour
 * PGA Tour 96
 * Power Rangers Zeo: Battle Racers
 * Pro Kishi Jinsei Simulation: Shōgi no Hanamichi
 * Saikousoku Shikou Shougi Mahjong
 * SD F-1 Grand Prix
 * SD Gundam G NEXT
 * Shin Shogi Club
 * Shogi Saikyou
 * Shogi Saikyou 2
 * Super Bomberman Panic Bomber World
 * Super Mario RPG: Legend of the Seven Stars
 * Super Robot Taisen Gaiden: Masō Kishin - The Lord Of Elemental
 * Super Shougi 3: Kitaihei
 * Taikyoku Igo: Idaten
 * Takemiya Masaki Kudan no Igo Taishou