6502

6502 - basic architecture, registers, instructions, ...
The 6502/65C02/65C816 Instruction Set Decoded
Wikibook - 6502 Assembly

Easy 6502

Commander X16 Assembly Language Tutorial, Lesson 1: The Basics (YouTube)
Addressing Modes: Commander X16 Assembly Language Tutorial (YouTube)
Branching and Subroutines: Commander X16 Assembly Language Tutorial, Lesson 3 (YouTube)
Arithmetic and Logic: Commander X16 Assembly Language Tutorial, Lesson 4 (YouTube)

6502 PRIMER: Building your own 6502 computer

My 6502 Files

Links

Emulating a CPU in C++ (6502) (YouTube)
Emulating a CPU in C++ #2 (6502) Unit Testing (YouTube)
Reverse Engineering the MOS 6502 CPU (en) (YouTube)
MOS Technology 6502 (Wikipedia)
Build a 6502 computer
6502.org - the 6502 microprocessor resource
6502.org - Homebuilt Projects

Miscellaneous

Binary to decimal can’t be that hard, right? (YouTube)
Build a 6502 computer (from kit)

Processor Status Register

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bitflagdescriptionvalue
0CCarry Flag0=false, 1=true
1ZZero Flag0=results-not-zero, 1=results-is-zero
2IIRQ Disable Flag0=enable, 1=disable
3DDecimal Mode Flag0=false, 1=true
4BBreak Command Flag0=no-break, 1=break
5 Unused 
6VOverflow Flag0=false, 1=true
7NNegative Flag0=positive, 1=negative

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