FDC9266P / FDC9266

FDC9266P / FDC9266 is a high-performance Floppy Disk Controller (FDC) integrated circuit, famously used in vintage computing systems like the SB180 single-board computer. It is a monolithic combination of the industry-standard FDC 765A floppy disk controller and the FDC 9229 floppy disk interface circuit.

Key Specifications and Details

The FDC9266 is designed to simplify the interfacing of floppy disk drives to microprocessor systems by integrating several previously external components onto a single chip. 

• Manufacturer: Standard Microsystems Corporation (SMC/SMSC).
• Package Types: Commonly available in a 40-pin Dual-In-Line (DIP) package or a 44-pin Plastic Leaded Chip Carrier (PLCC).
• Core Functions: It includes a digital data separator and a write precompensation generator, which eliminates the need for critical analog adjustments.
• Compatibility: Fully IBM-compatible in both single density (FM) and double density (MFM) recording formats.
• Drive Support: Capable of controlling up to four floppy disk drives, supporting 3.5", 5.25", and 8" drive sizes.
• Data Rates: Supports multiple data transfer rates including 125, 250, 300, and 500 Kb/s.
• Transfer Modes: Supports both DMA (Direct Memory Access) and non-DMA data transfer modes.

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