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Cromemco 4FDC
The Cromemco 4FDC Floppy Disk Controller is designed to interface both 5.25- and 8.0-inch floppy disk drives to the S-100 computer bus used in Cromemco and other IEEE 696 computers. It also contains an RS-232 serial I/O channel with software-selectable baud rates from 110 to 76,800. In addition, it has a 1 KB resident 2708 ROM containing Cromemco's RDOS, the resident disk operating system. The 4FDC was designed to drive Persci 277 8-inch single-density floppy drives. These drives were interesting in two respects: * They used a fast voice coil actuator and not a stepper motor to position the drive read write head. * The data separator electronics were on the drive itself. Due to the second fact, an unmodified 4FDC can not be used with 8-inch drives that don't have single-density data separators on the drive electronics. Later Cromemco disk controllers such as the 16FDC and 64FDC contained both single and double density data separators and the 64FDC also supplied write ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cromemco 4FDC Color Adjusted
Cromemco was a Mountain View, California microcomputer company known for its high-end Zilog Z80, Z80-based S-100 bus computers and peripherals in the early days of the personal computer revolution. The company began as a partnership in 1974 between Harry Garland and Roger Melen, two Stanford Ph.D. students. The company was named for their residence at Stanford University (George E. Crothers, Crothers Memorial, a Stanford dormitory reserved for engineering graduate students). Cromemco was incorporated in 1976 and their first products were the Cromemco Cyclops digital camera, and the Cromemco Dazzler color graphics interface - both groundbreaking at the time - before they moved on to making computer systems. In December 1981, Inc. (magazine), ''Inc.'' magazine named Cromemco in the top ten fastest-growing privately held companies in the U.S. Early history The collaboration that was to become Cromemco began in 1970 when Harry Garland and Roger Melen, graduate students at Stanford ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
