DEC Opcodes
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Kostenlos · In-App-Käufe · Entwickelt für iPad. Nicht für macOS überprüft.
Dec Opcodes – DEC Architecture Reference
Before the microprocessor, there was DEC. The minicomputers built by Digital Equipment Corporation didn't just advance computing - they defined it. Unix was born on a PDP-7. Spacewar! ran on a PDP-1. The field of Artificial Intelligence was born on the PDP-10. The VAX powered universities and research labs worldwide for a generation.
DecOpcodes puts the complete instruction sets of these legendary machines in your pocket.
Five iconic architectures covered: PDP-1 (1960) · PDP-8 (1965) · PDP-10 (1966) · PDP-11 (1970) · VAX (1977)
For every instruction:
• Full description of what the instruction does
• Octal and hex encoding
• Flags affected
• Addressing modes, word count, and cycle counts
• Assembly code examples and implementation notes
But there is a lot more than just dry opcodes:
• Complete system specifications and register architecture
• Historical context and cultural impact
• Archival photographs - front panels, system cabinets, and more
• Notable installations and the systems they powered
• Architecture variants and successors
• Interactive lessons on assembly language and console operations (ideal if you have an PiDP emulator)
Built for exploration:
• Search across all systems instantly
• A simple assembler for PDP-1, -8 and -11 code
• Filter by instruction category
• Sort alphabetically or by category
• Favorite instructions for quick reference
Beautifully designed:
• System-specific accent colours
• Five themes including Terminal green and Blinkenlights orange
• Full Dark Mode support
From the 18-bit simplicity of the PDP-1 to the 32-bit sophistication of the VAX, DecOpcodes is a fascinating and interactive journey through the machines that made modern computing possible.
All features are free and unlocked. If you like the app you can always leave a nice review or tip the developer!
Bewertungen & Rezensionen
What's New in v1.9
• DEC Glossary - Searchable guide to 45+ terms across buses, memory, storage, I/O, processors, software, and DEC culture
• PDP-11 instructions added - MFPI, MFPD, MTPI, MTPD (previous-space memory access) and SPL (set priority level)
• Memory Maps corrected - Separate PDP-11/45 (256KB) and PDP-11/70 (4MB) layouts; KW11-L and KW11-P clocks added to I/O page; byte units for PDP-11 and VAX
• Official DEC handbooks linked - Architecture Handbook PDFs from bitsavers for all five systems in Programming Resources
• System landing page setting - Choose whether tapping a system opens the instruction list or the system info page
• PiDP-8 Quick Start expanded - OS/8 first commands, paper tape bootstrap sequence, Spacewar! controls, TSS/8 multi-user login, USB storage guide
• PDP-1 toggle programs fixed - Correct memory addresses and proper ADD-based counting loop
• Dynamic Type support - All sidebar and card text now scales with your preferred font size
• Accessibility improved - Better VoiceOver labels and touch targets throughout
• Faster launch - Removed artificial splash screen delay
Das Entwicklungsteam, John Kennedy, hat darauf hingewiesen, dass die Datenschutzrichtlinien der App den unten stehenden Umgang mit Daten einschließen können. Weitere Informationen findest du in den Datenschutzrichtlinien des Entwicklungsteams .
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Erfordert iOS 18.0 oder neuer.
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