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・ Ridderschap van Holland (1682)
・ Ridderstad
・ Ricochet (TV production company)
・ Ricochet (video game)
・ Ricochet (website)
・ Ricochet (wrestler)
・ Ricochet firing
・ Ricochet Gathering
・ Ricochet Infinity
・ Ricochet Lost Worlds
・ Ricochet Rabbit & Droop-a-Long
・ Ricochet Robot
・ Ricochet Xtreme
・ Ricochet!
・ Ricoh
Ricoh 2A03
・ Ricoh 500
・ Ricoh 5A22
・ Ricoh Arena
・ Ricoh Black Rams
・ Ricoh Caplio 400G Wide
・ Ricoh Caplio 500SE
・ Ricoh Caplio G3
・ Ricoh Caplio GX100
・ Ricoh Caplio R3
・ Ricoh Caplio RX
・ Ricoh Coliseum
・ Ricoh Cup
・ Ricoh CX1
・ Ricoh G700


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Ricoh 2A03 : ウィキペディア英語版
Ricoh 2A03

The Ricoh 2A03 or RP2A03 (NTSC version) / Ricoh 2A07 or RP2A07 (PAL version) is the 8-bit microprocessor in the Nintendo Entertainment System video game console manufactured by Ricoh. It contained a second source MOS Technology 6502 core, lacking the 6502's binary-coded decimal mode, with 22 memory-mapped I/O registers that controlled an APU, rudimentary DMA, and game controller polling. It was also used as a sound chip and secondary CPU by Nintendo's arcade games ''Punch-Out!!'' and ''Donkey Kong 3''.
== Regional variations ==
European and Australian versions of the NES used the Ricoh 2A07 or RP2A07 processor, which was identical to the 2A03 except for a different clock divider and the 50 Hz vertical refresh rate used in the PAL television standard.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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