Integrated floppy disk drive controller
US4742448A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1986 |
| Grant date | May 3, 1988 |
| Priority date | — |
| Expiry date | Dec 18, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/06
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A floppy disk drive controller interface implemented as an integrated circuit on a single semi-conductor chip. The controller connects to a host computer data bus and one or more floppy disk drives. Based upon clocking and control signals received from a digital computer, the controller generates serial encoded data for recording on a floppy disk and receives serial encoded data previously recorded on a floppy disk. The controller comprises a read control circuit including a read data register, write control means including a write data register, a mode register, a status register, state latches, a decoder and special function registers. The controller operates by the setting and clearing of the state latches and reading or writing the mode register, the status register, the special function registers, the read data register and the write data register. The setting of a state latch and accessing of a register is done simultaneously. The controller, under software control, operates in a synchronous or asynchronous read/write mode, and slow or fast read/write mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.