Variations and Derivatives
There were several variants of the NMOS 6502 produced:
- The MOS Technology 6507 had reduced memory addressing capability and no interrupts.
- The MOS Technology 6510 has a built-in 6-bit programmable input/output port.
- The Ricoh 2A03 was a 6502 variant lacking the BCD Mode, used in the Nintendo Entertainment System.
- The 6502C (Sally) was a customized 6502 chip used in later Atari 8-bit computers. It has a HALT signal on pin 35 and a second R/W on pin 36 (these pin are N/C on a standard 6502).
Read more about this topic: MOS Technology 6502
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