Tag: opencbm

2 matching upgrades

Showing 2 products.

StatusProductWhat it doesCompatibilityLinks
Build itChecked Jul 25, 2026XS1541by Nils Eilers and Andre Fachat
ieee 488iecusb serialmodern hostopencbmdisk emulationfile transfer

Bridges a modern computer over USB serial to Commodore IEEE-488 and IEC equipment, or supplies host-backed storage to a Commodore computer.

The maintainer explicitly calls XS1541 orphaned and reconstructed its documentation from an archived build guide. The surviving page provides a schematic, firmware, and detailed assembly and flashing steps, but not a turnkey current kit. The original board connector footprints are buggy: the narrow connector can short contacts unless the coding gap is physically corrected. A build also requires fine-pitch FT232RL soldering, ATmega programming, fuse setup, cables, and suitable host software.

Sources
  • Commodore PET series Stated family
  • Commodore 64 Exact model
  • Commodore VIC-20 Exact model
  • Commodore 128 Exact model
XS1541 project and build guideXS1541 revision D schematic
AvailableChecked Jul 27, 2026ZoomFloppy and XUM1541 Familyby Nate Lawson, RETRO Innovations, and compatible-board makers
modern hostusbusb cfile transferopencbmparallel cabledisk imagingopen hardware

USB interfaces that connect Commodore IEC disk drives to a modern computer for disk transfer and archival.

Retro Electronics listed two assembled USB-C compatible boards in stock on 2026-07-25. The reference ZoomFloppy hardware files are openly published. Required USB and Commodore drive cables are not supplied with either documented route, and parallel-transfer features need additional drive-side hardware.

Sources
  • Floppy preservation hardware Bus/interface
Official ZoomFloppy project pageBuy a current XUM1541-compatible USB-C boardZoomFloppy open hardware files