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The MOS Technology 6502 (typically pronounced "sixty-five-oh-two" or "six-five-oh-two") [3] is an 8-bit microprocessor that was designed by a small team led by Chuck Peddle for MOS Technology.
The methods by which the MPU state is preserved and restored within an ISR will vary with the different versions of the 65xx family. For NMOS processors (e.g., 6502, 6510, 8502, etc.), there can be only one method by which the accumulator and index registers are preserved, as only the accumulator can be pushed to and pulled from the stack. [5]
In August 2008 the 6502 assembly language source code of Donkey Kong was published at the AtariAge forum by Curt Vendel, [125] and was discussed there by the original developer, Landon Dyer. [126] Doom: 1993 2023, 2024 Macintosh, DOS First-person shooter: id Software
The original 6502 has 56 instructions, which, when combined with different addressing modes, produce a total of 151 opcodes of the possible 256 8-bit opcode patterns. The remaining 105 unused opcodes are undefined, with the set of codes with low-order 4-bits with 3, 7, B or F left entirely unused, the code with low-order 2 having only a single ...
Atari ordered a custom 6502, initially labelled 6502C, but eventually known as SALLY to differentiate it from a standard 6502C. A 6502C was simply a version of the 6502 able to run up to 4 MHz. The A models run at 1 MHz, and the B's at 2 MHz. The basis for SALLY is a 6502B.
The CSG 65CE02 is an 8/16-bit microprocessor developed by Commodore Semiconductor Group in 1988. [1] It is a member of the MOS Technology 6502 family, developed from the CMOS WDC 65C02 released by the Western Design Center in 1983.
Lacking such for 6502, this seealso should go. Jeh 22:52, 23 March 2015 (UTC) From a June 2014 Intersil Data Sheet – "HA-2520, HA-2522, HA-2525 comprise a series of operational amplifiers delivering an unsurpassed combination of specifications for slew rate, bandwidth and settling time."
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