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The Ricoh 2A03 or RP2A03 (NTSC version) / Ricoh 2A07 or RP2A07 (PAL version) is an 8-bit microprocessor manufactured by Ricoh for the Nintendo Entertainment System video game console. It was also used as a sound chip and secondary CPU by Nintendo's arcade games Punch-Out!! and Donkey Kong 3.
Ricoh manufactured several electronic components for video game consoles - the Ricoh 2A03 8-bit CPU with built-in PSG sound as well as the Ricoh 2C02 used in the Nintendo Entertainment System (2A07 CPU in the PAL NES and the 6538 PPU in PAL famiclones), and the Ricoh 5A22 16-bit CPU and the Ricoh 5C77 and Ricoh 5C78 PPUs used in the Super ...
Aug 31, 2020 · The Ricoh 2A03, RP2A03 (NTSC), Ricoh 2A07, RP2A07 (PAL) or 2A03 is the 8-bit microprocessor in the Nintendo Entertainment System (NES), (also known as the Famicom). Technical details. Manufactured by Ricoh and based on the MOS Technology 6502. NTSC versions of the NES use the 2A03, which is run at 1.79 MHz.
The NES CPU core is based on the 6502 processor and runs at approximately 1.79 MHz (1.66 MHz in a PAL NES). It is made by Ricoh and lacks the MOS6502's decimal mode. In the NTSC NES, the RP2A03 chip contains the CPU and APU; in the PAL NES, the CPU and APU are contained within the RP2A07 chip.
Jan 8, 2023 · CPU - Ricoh 2A03 CPU which is a MOS 6502 without a decimal mode. Clocked 1.789773Mhz for NTSC (System 21.47727Mhz / 12) and 1.773447Mhz for PAL (System 26.601171Mhz / 15) Memory - 2 KB; Video Ricoh 2C02 PPU (Picture Processing Unit) Resolution - 256 x 240 pixels (Only 256 x 224 pixels are visible on NTSC)
Jul 16, 2015 · The NES’ Ricoh 2A03/2A07, had five separate ‘channels’ (individual functions for generating a single waveform 16 ); two pulse wave channels, one triangle channel, one pseudo-random noise generator and a rarely used Delta Modulation Channel (DMC) for playing Differential Pulse-Code Modulation (DPCM) samples 1718 (Figure 1).
The Ricoh 2A03 or RP2A03 (NTSC version) / Ricoh 2A07 or RP2A07 (PAL version) is an 8-bit microprocessor manufactured by Ricoh for the Nintendo Entertainment System video game console. It was also used as a sound chip and secondary CPU by Nintendo's arcade games Punch-Out!! and Donkey Kong 3.
