CMD FD series

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The CMD FD series was Creative Micro Designs (CMD)'s range of third-party floppy disk drives for the Commodore 8-bit line of home computers. Using 3½" floppy disks, they provided a significantly larger storage capacity than Commodore-produced drives; the FD-2000 offered 1600KB of storage using standard double-sided, high-density floppies, while the FD-4000 also allowed the use of 3200KB extended-density floppies. In contrast, the Commodore 1581 3½" drive only supported 800KB double-sided, double-density disks.


In addition to the higher storage capacity, the FD series also provided additional features not found on the Commodore 1581. A "<code>SWAP</code>" button on the front panel allowed the drive number to be easily switched with that of another Commodore drive on the serial bus, without the need to enter any commands into the computer. It also provided a "1541 emulation mode", allowing partitions on a 3½" disk to simulate the behavior of a 5¼" Commodore 1541 floppy. The ability to use partitions and subdirectories was also expanded beyond the rudimentary form found in the 1581. A real-time clock was also available as an add-on feature; it could be used to time-stamp files and to automatically set the system clock in the GEOS operating system. The CMD FD series also included native JiffyDOS compatibility; while using the JiffyDOS system with a Commodore drive required replacing both the KERNAL and drive ROM...
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