what is a 65c02? - EAS

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    WDC 65C02 - Wikipedia

    https://en.wikipedia.org/wiki/WDC_65C02

    The Western Design Center (WDC) 65C02 microprocessor is an enhanced CMOS version of the popular nMOS-based 8-bit MOS Technology 6502. The 65C02 fixed several problems in the original 6502 and added some new instructions, but its main feature was greatly lowered power usage, on the

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    Introduction and features

    The 65C02 is a low cost, general-purpose 8-bit microprocessor (8-bit registers and data bus) with a 16-bit program counter and address bus. The register set is small, with a single 8-bit accumulator (A), two 8-bit index registers(X

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    Comparison with the NMOS 6502

    Basic architecture
    Although the 65C02 can mostly be thought of as a low-power 6502, it also fixes several bugs found in the original and adds new instructions,

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    65SC02

    The 65SC02 is a variant of the WDC 65C02 without bit instructions.

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    Notable uses of the 65C02

    Home computers
    • Apple IIc portable by Apple Computer (NCR 1.023 MHz)
    • Enhanced Apple IIe by Apple Computer (1.023 MHz)
    • BBC Master home/educational computer, by Acorn Computers Ltd(2 MHz 65SC12 plus optional 4 MHz 65C102

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    Further reading

    • 65C02 Datasheet; Western Design Center; 32 pages; 2018.
    • Programming the 65816- including the 6502, 65C02, 65802; 1st Ed; David Eyes and Ron Lichty;

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    External links

    • 65C02 webpage - Western Design Center
    • 65xx/65Cxx/65SCxx Differences - CPU World
    • 6502/65C02/65C816 Instruction Set Decoded – From Neil Parker's Apple II page

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    See also

    • Interrupts in 65xx processors
    • CSG 65CE02, a further enhanced version of the 65C02

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  2. W65C02S 8 bit Microprocessor - Western Design Center

    https://www.westerndesigncenter.com/wdc/... · PDF tệp

    www.WDC65 xx.com Page 5 1 INTRODUCTION The W65C02S is a low power cost sensitive 8-bit microprocessor. The W65C02S is a fully static core and the PHI2 clock can be stopped when it is in the high (logic 1) or low (logic 0) state.

  3. 6502.org Tutorials: 65C02 Opcodes

    www.6502.org/tutorials/65c02opcodes.html

    The 65C02 has many similarities to the NMOS 6502, but the 65C02 has additional instructions and addressing modes available. In addition, there are instructions with functional differences and different cycle counts. These differences are documented below. The columns of the tables used to describe the instructions are: OP - the opcode in hex

  4. 65c02 | Hackaday

    https://hackaday.com/tag/65c02

    15/10/2021 · It’s a 65C02 single board computer, designed with robotics in mind. The 6502 board is just what you would expect; a CPU, RAM, ROM, CPLD glue, and …

  5. W65C02S 8-bit Microprocessor - Western Design Center

    https://www.westerndesigncenter.com/wdc/w65c02s-chip.php

    05/01/2021 · The W65C02S is a low power 8-bit Microprocessor utilized in a vast array of products for the Automotive, Consumer, Industrial, and Medical markets. This chip features a full external data (8-bit) and address (16-bit) bus for easy integration.

  6. Architecture the 65C02 - Architecture - Programming the ...

    https://apprize.best/programming/65816/6.html

    Architecture the 65C02 - Architecture - Designed for programmers at every experience level, the book opens with a primer on basic assembly language programming concepts for beginners. After introducing the architecture of each generation of microprocessor, a detailed tutorial offers a step-by-step survey of all 256 instructions and all twenty-five addressing modes.

  7. Differences between NMOS 6502 and CMOS 65c02

    wilsonminesco.com/NMOS-CMOSdif

    12/10/2021 · Hardware differences. CMOS allows much higher speeds. All the 65c02's being made today are guaranteed to meet specs at at least 14MHz. All WDC ones are tested at 20MHz. 6502.org forum member "plasmo" got both a W65C02S and a W65C816S to run at 36MHz, 40MHz at 5.3V (see here ).

  8. The 6502/65C02/65C816 Instruction Set Decoded - LLX.com

    https://llx.com/Neil/a2/opcodes.html
    • Though the 6502 instruction set has a number of quirks and irregularities, large portions of it can be broken up into regular patterns. An understanding of these patterns can be beneficial to authors of assemblers or disassemblers for 6502 code--for example, the Apple II ROM uses the information described below to greatly reduce the size of the instruction tables used by the built …
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  9. microprocessor - What is the memory map of a w65c02s ...

    https://electronics.stackexchange.com/questions/...

    09/04/2021 · FWIW the 65c02 is still being manufactured. \$\endgroup\$ – StarCat. Apr 10 2021 at 12:23 \$\begingroup\$ @StarCat that's why I didn't call page 0 a register file. But I had no idea the stack model was so restrictive, I was firmly in the other camp. \$\endgroup\$ – …

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    • New 65C02/W65C816 copro - stardot.org.uk

      https://stardot.org.uk/forums/viewtopic.php?t=13559

      13/08/2017 · If there isn't a wealth of 65C816 software then a 65C02 processor seems the best direction I think. Anyone have a compelling reason to fit more than 128KB RAM? The next logical step is 16MB (from a parts point of view) which is a lot of 80 track discs! 99% of the software will be expecting the 64KB from an Acorn 2nd proc. Top.

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