# Z80CPM

> Z80CPM (iPhone/iPad app by Aaron Wohl.)

- Source: https://appshunter.io/ios/app/z80cpm/id6756590871 (this page in markdown: same URL + `.md`)
- Developer: [Aaron Wohl](https://appshunter.io/developer/1860336063)
- Category: Utilities, Developer Tools
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 1 MB
- Languages: American English
- Released: 2025-12-18
- Data updated: 2026-07-17
- User reviews in markdown: https://appshunter.io/ios/app/z80cpm/id6756590871/reviews.md

## What is Z80CPM?

RomWBW CP/M brings the classic CP/M operating system to your iPhone, iPad, and Mac with a full Z80 processor emulator.

FEATURES

• Full Z80 Emulation - Accurate instruction emulation runs authentic CP/M software
• VT100 Terminal - ANSI escape sequence support for text adventures and productivity apps
• Multiple Disk Support - Mount up to 4 disk images simultaneously
• Download Disk Images - Fetch CP/M disk images directly from the RomWBW project
• Works Offline - Downloaded disk images are stored locally
• Native Mac Support - Runs natively on macOS via Mac Catalyst

CLASSIC SOFTWARE

Run the software that defined personal computing:
• Operating Systems: CP/M 2.2, CP/M 3, ZSDOS, NZCOM, ZPM3
• Word Processing: WordStar
• Programming: Turbo Pascal, Microsoft BASIC
• Text Adventures: Zork, Adventure, Hitchhiker's Guide to the Galaxy
• Databases: dBASE II
• And thousands more CP/M programs

GETTING STARTED

1. Open Settings and download a disk image (CP/M 2.2 recommended)
2. Select the disk image for Unit 0
3. Press Play to start the emulator
4. Press 0 at the boot menu to boot from disk

BUILT ON ROMWBW

This emulator is built on the RomWBW HBIOS platform, the same firmware used by real retro Z80 hardware projects. Disk images are downloaded from the official RomWBW project and include freely distributable CP/M software.

TECHNICAL DETAILS

• 80x25 character terminal display
• hd1k disk format (8MB per slice, 64MB per disk)
• Hardware keyboard support
• Portrait and landscape orientation

Perfect for retrocomputing enthusiasts, computer history education, or anyone who wants to experience the operating system that launched the personal computer revolution.


## Version history (last 5 releases)

### 1.4.9 — 2026-03-19

- Fixed UI freeze when using "Open File" or "Create New" disk dialogs in Settings on macOS
  - All 4 disk drives now appear in the toolbar menu (previously only showed Disk 0 and Disk 1)
  - Disk load and export options organized into submenus for cleaner navigation

### 1.4.7 — 2026-02-11

- NVRAM persistence: Boot settings from ROM's SYSCONF ('W' menu) now survive app restarts
- Simplified boot configuration — removed boot string text field, use ROM's SYSCONF menu instead
- Read-only display of current auto-boot setting with Clear Auto-Boot safety button
- Fixed autoboot clearing via legacy boot_string mechanism
- Boot setting now correctly applied on both start and reset

### Disk Management
- Write protection warning when modifying auto-downloaded disk images ("Don't Warn Again" option)
- Removed per-disk slice limits — all slices now accessible to OS tools
- Removed duplicate Infocom disk (already included in Games)
- Fixed duplicate Games entry in disk manifest

### UI Improvements
- Build date and number shown in status bar and About box
- Font size options consolidated into submenu to reduce menu clutter
- Help menu (Cmd+?) now works properly on Mac Catalyst
- Better error diagnostics in Help system with HTTP status checking and cache fallback
- Keyboard handling fix for manifest warning dialog

### Emulator Core
- Unified RAM bank initialization using shared HBIOSDispatch bitmap
- Boot disk correctly assigned as A: via upstream CB_BOOTVOL
- Manifest disk write detection in emulator I/O layer

### 1.4.6 — 2026-01-18

Writes to manifest disks warn that the changes may be lost

### 1.4.3 — 2026-01-09

Booting from any hard disk image sets that disk to be A:

### 1.4.2 — 2026-01-04

Fixes ASSIGN command to manipulate disks in an OS.

## Apps similar to Z80CPM

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| --- | --- | --- | --- |
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## More apps by Aaron Wohl

- [PharoSmalltalk](https://appshunter.io/ios/app/pharosmalltalk/id6759073615)
- [ArcWords Crossword Puzzle](https://appshunter.io/ios/app/arcwords-crossword-puzzle/id6760589363)
- [WordAmazing Brain Workout](https://appshunter.io/ios/app/wordamazing-brain-workout/id6762011530)

All apps by Aaron Wohl: https://appshunter.io/developer/1860336063

## Related topics

[z80cpm](https://appshunter.io/ios/topics/z80cpm) · [z80](https://appshunter.io/ios/topics/z80) · [zmoofit](https://appshunter.io/ios/topics/zmoofit) · [zsc lions](https://appshunter.io/ios/topics/zsc-lions)

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*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 2026-07-17.*