Easy65C02 is an fork of Easy6502 by Nick Morgan which support additionnals opcodes found in the WDC 65C02 CPU.
See https://eddybeaupre.github.io/easy65C02/ for the live site.
The original 6502 version can be found at https://skilldrick.github.io/easy6502/
This simulator load it's code a $E000 instead of $0600. Mostly to simulate running from ROM instead of RAM.
| instruction | OpCode | Implemented | Description |
|---|---|---|---|
| BRA r | 0x80 | Yes | Branch Always |
| STZ d | 0x64 | Yes | Store Zero (Zero Page) |
| STZ d,X | 0x74 | Yes | Store Zero (Zero Page, X) |
| STZ a | 0x9C | Yes | Store Zero (Absolute) |
| STZ a,X | 0x9E | Yes | Store Zero (Absolute, X) |
| ORA (d) | 0x12 | Yes | OR with Accumulator (Indirect) |
| AND (d) | 0x32 | Yes | AND with Accumulator (Indirect) |
| EOR (d) | 0x52 | Yes | EOR with Accumulator (Indirect) |
| ADC (d) | 0x72 | Yes | Add to Accumulator with Carry (Indirect) |
| STA (d) | 0x92 | Yes | Store Accumulator (Indirect) |
| LDA (d) | 0xB2 | Yes | Load Accumulator (Indirect) |
| CMP (d) | 0xD2 | Yes | Compare with Accumulator (Indirect) |
| SBC (d) | 0xF2 | Yes | Subtract from Accumulator with Borrow (Indirect) |
| BIT d,X | 0x34 | Yes | Bit Test with Accumulator (Zero Page, X) |
| BIT # | 0x89 | Yes | Bit Test with Accumulator (Immediate) |
| BIT a,X | 0x3C | Yes | Bit Test with Accumulator (Absolute, X) |
| INC | 0x1A | Yes | Increment Accumulator by one (Implied) |
| DEC | 0x3A | Yes | Decrement Accumulator by one (Implied) |
| PHY | 0x5A | Yes | Push Y to Stack |
| PLY | 0x7A | Yes | Pull Y from Stack |
| PHX | 0xDA | Yes | Push X to Stack |
| PLX | 0xFA | Yes | Pull X from Stack |
| TRB d | 0x14 | Yes | Test and Reset Bits (Zero Page) |
| TRB a | 0x1C | Yes | Test and Reset Bits (Absolute) |
| TSB d | 0x04 | Yes | Test and Set Bits (Zero Page) |
| TSB a | 0x0C | Yes | Test and Set Bits (Absolute) |
| JMP (a,X) | 0x7C | Yes | Jump (Absolute, X) |
Full list of 65C02 OpCodes: https://feertech.com/legion/reference65c02.html
Official WDC datasheet for the 65C02: https://www.westerndesigncenter.com/wdc/documentation/w65c02s.pdf