Opcodes - retro CPU reference
Istruzione
Gratis · Acquisti in‑app · Progettata per iPad. Non verificata per macOS.
Opcodes – The Retro CPU Reference
The definitive opcode reference for the legendary processors that launched the personal computer revolution.
Whether you're a retrocomputing enthusiast, a student of computer history, writing code for classic hardware, or just a big old nerd - the Opcodes app gives you everything you need.
Eighteen iconic processors covered: Intel 4004 · Intel 8008 · Intel 8080 · Intel 8085 · Intel 8088 · Zilog Z80 · Motorola 6800 · Intel 8085 · Motorola 6809 · MOS 6502 · Signetics 2650 · RCA 1802 - SC/MP · Motorola 68000 · Intel 8086 · WDC 65816 · Texas Instruments TMS9900 · INMOS Transputer · ARM2
For every opcode:
• Full description of what the instruction does.
• Hex, octal, and decimal values.
• Flags affected.
• Addressing modes and cycle counts.
• Assembly code examples - including loops, conditionals, and common patterns.
More than just opcodes:
• CPU history and historical context.
• IC pinout diagrams.
• Notable systems that used each CPU, with memory maps and other background information.
• Chip variants and successors.
• A silly card game(!)
• Simple assembler / disassembler for many CPUs.
Built for exploration:
• Search for opcodes by name or category.
• Sort by mnemonic, opcode byte, or category.
• Filter by category, Quick Find with a colorful map.
• Undocumented instructions clearly marked and optionally displayed.
More than microprocessors:
• Information on key support chips: video, sound, memory and more.
Cool design:
• Clean, readable layout optimised for quick reference.
• Multiple colour themes.
• Full "dark mode" support.
Everything is included with absolutely no in-app purchase required.
Recent additions:
• Quiz game - test your CPU knowledge!
• Share CPU cards - beautiful shareable images showing specs and history for any processor
• External references - curated links to community resources for all 18 CPUs
• "Opcodes display first" setting - choose whether selecting a CPU shows opcodes or info first
• Chip-maker colour themes - Zilog, MOS Tech, and Motorola replace the old themes
• Enhanced 6502 docs - JMP page boundary bug, BRK behaviour, and Read-Modify-Write quirks
• Fixed Scratchpad hang when switching tabs
Valutazioni e recensioni
Improved display of flags, and source/destination order
Improved Motorola 680x0 instruction display
Added SP0256 to support chips, complete with working allophone system. Try making say rude words!
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Informazioni
- Dimensioni
- 61,1 MB
- Categoria
- Istruzione
- Compatibilità
Richiede iOS 18.0 o versioni successive.
- iPhone
Richiede iOS 18.0 o versioni successive. - iPad
Richiede iPadOS 18.0 o versioni successive. - Mac
Richiede macOS 15.0 o versioni successive e un Mac con chip Apple M1 o versioni successive. - Apple Vision
Richiede visionOS 2.0 o versioni successive.
- iPhone
- Lingue
- Inglese
- Età
4+
- 4+
- Acquisti in-app
Sì
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- Fornitore
John Kennedy
- John Kennedy non si identifica come operatore commerciale per questa app. Se ti trovi all’interno dello Spazio economico europeo, i diritti dei consumatori non si applicano agli accordi tra te e il fornitore.
- Copyright
- © John Kennedy 2026