Instruction Set

• Introduction into Z80 Instruction Set Be aware of the fact that style how statements are arranged in examples reflects non-standard features offered by ZINT Z80-Interpreter
• Z80 Assembler Syntax with detailed information about instructions, still under construction!
• Z80 Instruction Set Summary with brief explanations
• Z80 OpCode Formation Rules rudimentary
• Z80 programming guide based upon the original Zilog manuals and restructuring of the data. Contains both an HTML version of the enclosed table and a GIF image of the z80 machine code quick reference. By Mary Bell.
• Decoding Z80 Opcodes - of use to disassembler and emulator writers, by Christian Dinu (NEW!!).
• Z80 Instruction Set, sorted in various ways and combinations:
  • Alphabetically sorted Showing # of T-states and brief explanation of instructions
  • Alphabetically sorted showing flags affected and brief explanation of instructions
  • Alphabetically sorted Showing # of T-states and size of instructions
  • (combination of the three texts mentioned above, including some corrections and supplements, NEW!!.)

  • Alphabetically sorted ( HTML ) Explaining Flag Affection
  • Alphabetically sorted ( HTML ) Showing # of T-states and telling which flags are affected
  • Z80 instruction breakdown by machine code See what"s goes on in each machine cycle. Thanks to Alvin and Vaggelis.
• Use one of these lists to disassemble "by hand":
  • Z80 Instruction Set, OpCode # sorted (Hex)
  • Z80 Instruction Set, OpCode # sorted (Hex)
  • Z80 Instruction Set, OpCode # sorted (Hex and Decimal)
  • Complete Opcode List (including undocumented ones) Showing # of T-states, M-Cycles, M1-Cycles
  • The Documented un-documented instructions (PDF) Thanks Sean!
  • Full Z80 Opcode List Including Undocumented Opcodes By J.G.Harston
  • A Word95 document with all the instruction tables Good reading here