Zimmers.NET Files (formerly ftp.funet.fi)

/pub/cbm/firmware/drives/new/

Serial bus based Commodore disk drives

Subdirectories

1541/: 1540, 1541, 1541C and 1541-II disk drive firmware.
1551/: 1551 disk drive firmware.
1571/: 1570, 1571 and 1571CR disk drive firmware.
1581/: 1581 disk drive firmware.

Mirror sites – General information – File types – Data transfer