opencbm ☆

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Description:
Provides access to various floppy drive formats

Type: Formula | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: Other

Tags: commodore retro-computing disk-imaging hardware-interface c64

Install: brew install opencbm

About:
OpenCBM is a suite of tools and libraries designed for accessing and manipulating Commodore 1541/1571/1581 disk formats. It provides low-level command access to compatible floppy drives connected via XU1541, XUM1541, or ZoomFloppy hardware interfaces. This enables precise control for reading, writing, and verifying legacy disk images on modern systems.

Key Features:

Command-line utilities for disk image management (cbmcopy, cbmforcon)
Support for XU1541, XUM1541, and ZoomFloppy hardware interfaces
Cross-platform library (Linux, Windows, macOS)
Low-level access to Commodore 1541/1571/1581 drives

Use Cases:

Preserving and restoring legacy Commodore 64/128 software archives
Writing modern disk images to authentic floppy media
Developing hardware interfaces for vintage computer systems

Alternatives:

ZoomFloppy – Hardware device often used in conjunction with OpenCBM; OpenCBM provides the software stack to drive it.
X1541 – Alternative cable/hardware interface; OpenCBM supports similar devices but focuses on the software protocol implementation.

Version History

Detected	Version	Rev	Change	Commit
Oct 10, 2024 3:50pm		0	VERSION_BUMP	f5367cd6