# Z80 Reference — Complete Zilog Z80 reference > Zilog Z80 opcode reference with detailed commands and sample code. (iPhone/iPad app by Sgc Marketing Ltd.) - Source: https://appshunter.io/ios/app/z80-reference/id1453302679 (this page in markdown: same URL + `.md`) - Developer: [Sgc Marketing Ltd](https://appshunter.io/developer/959409647) - Category: Reference, Education - Price: Free - Rating: 5.00/5 from 3 App Store ratings · 5 written reviews indexed - Age rating: 4+ - Requires: iOS 12.1 · 10 MB - Languages: English - Released: 2019-02-17 - Data updated: 2026-08-05 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/z80-reference/id1453302679/reviews.md ## What is Z80 Reference? This reference application provides access to every single Z80 opCode in a convenient scrolling list, colour-coded by category. Selecting an opCode provides a full overview of the command, together with fully documented sample code. Simple We've spent a long time creating an interface that is wonderfully easy to use. Z80 opCodes are selected by scrolling through a simple list of all available commands and selecting using your finger. Once selected you have access to all the information you could need. Elegant The subtle styling of Z80 Reference has been designed to be easy on the eye, whether read during the day or at night. Having the reference available by your side whilst programs are written on your full-screen PC. Educational Z80 Reference is the ultimate companion to anyone that is looking to create programs based on the Zilog Z80 processor. Every aspect of each opCode is covered in detail, with particular attention paid to delivering useful example source code. ## Key features - Complete Z80 opcode list - Color-coded by category - Detailed command overview - Fully documented sample code - Easy-to-use interface - Elegant design ## Recent user reviews (5 of 5) All indexed reviews: https://appshunter.io/ios/app/z80-reference/id1453302679/reviews.md ### 5/5 — Excellent app but wish it supported iOS 9 *2022-07-31* IOS 9 support would be nice ### 4/5 — Extraordinary *2020-09-03, version 1.0.4* Really very practical. Only my language (Spanish) is missing. Something like this would also be extraordinary for the Amstrad Firmware :-) ### 5/5 — Great app for quick referencing *2019-08-26* This app is incredibly useful for whenever you need an in-depth explanation of the workings of practically any Z80 instruction. The interface is simple, with an easy search function and an alphabetical list. The explanations are clear and concise, and the example code is a useful touch. ### 5/5 — Very handy *2019-08-07* Very cool. But the ‘prev’ is obscured when in portrait layout, and there is no explanation of the colour coding that I can see. But even so it’s a handy tool when developing Z80 assembly. ### 5/5 — Top Referenz, dafür das es kostenlos ist *2019-02-23, version 1.0.2* ... ## Frequently asked questions about Z80 Reference ### What is Z80 Reference? Z80 Reference is a mobile application that provides a complete reference for every Zilog Z80 opcode. It includes detailed explanations and sample code for each command, presented in an easy-to-navigate format. ### Is Z80 Reference free to use? Yes, Z80 Reference is completely free to download and use. There are no in-app purchases or advertisements. ### What devices does Z80 Reference support? Z80 Reference is available for iPhone, iPad, and iPod touch devices. ### How is the information organized in Z80 Reference? All Z80 opcodes are presented in a scrolling list and are color-coded by category for quick identification. Selecting an opcode brings up a detailed overview and sample code. ### What is the age rating for Z80 Reference? Z80 Reference has an age rating of 4+, making it suitable for a wide range of users. ### When was Z80 Reference last updated? The latest version of Z80 Reference was updated on February 24, 2019. The initial release date was February 17, 2019. ### How does Z80 Reference help with Z80 programming? It serves as an ultimate companion for creating programs based on the Zilog Z80 processor by detailing every aspect of each opcode with useful example source code. ### What is the user feedback on Z80 Reference? Based on the available data, Z80 Reference has a perfect rating of 5.0 stars from 3 ratings, indicating very positive user sentiment. ## Version history (last 4 releases) ### 1.0.4 — 2019-02-24 - Fixed bug where incorrect OpCode was shown when selected from a search - Corrected multiple OpCodes with incorrect descriptions - Add Previous/Next buttons to navigate OpCodes - Added category for each OpCode - App now remembers the font size previously selected - Selected OpCode now highlights using category colour - Keyboard now dissapears when selecing an OpCode ### 1.0.2 — 2019-02-22 - Added timings (with conditions) - Changed colours to avoid clashes - Added search box to table - Reformatted the condition flags ### 1.0.1 — 2019-02-19 Thanks to the Facebook community for spotting some early bugs. - Corrected data byte position for BIT/RES and SET instructions. - Corrected incorrect OpCode for HALT. - Corrected wrong description on JP (HL) instruction. - Added undocumented instructions: SLL; LD r, IXh/IXl/IYh/IYl. ### 1.0 — 2019-02-17 No release notes. ## Apps similar to Z80 Reference | App | Rating | Price | Category | | --- | --- | --- | --- | | [Astrophotographer’s Universe](https://appshunter.io/ios/app/astrophotographers-universe/id6755179859) | 5.0 (2) | Free | Reference | ## Related topics [z80](https://appshunter.io/ios/topics/z80) · [z80 reference](https://appshunter.io/ios/topics/z80-reference) · [z90](https://appshunter.io/ios/topics/z90) · [zx spectrum](https://appshunter.io/ios/topics/zx-spectrum) · [zcode system](https://appshunter.io/ios/topics/zcode-system) · [8086](https://appshunter.io/ios/topics/8086) · [z92.7](https://appshunter.io/ios/topics/z92-7) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-05.*