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WD1793 FDC
1981
Western Digital's floppy disk controller from its FD179x family, widely used in 1980s computers and disk systems.
Reference & documentation
External technical references for programming WD1793 FDC and for writing emulators.
| Resource | Type | Notes |
|---|---|---|
| FD179X-02 Floppy Disk Formatter/Controller Datasheet (PDF) ↗ | Datasheet | Full FD179X family datasheet: commands, registers, formatting |
| Western Digital FD179X-01 Datasheet (1979 scan) ↗ | Datasheet | Original 1979 Western Digital FD179X datasheet scan |
| Western Digital WD179X Controller Manual (PDF) ↗ | Datasheet | Alternate clean WD179X datasheet scan |
| FD1793 Track Formatting Reference ↗ | Format | IBM System 34 track format byte layout, Write Track |
| FD179X-02 Datasheet - Pin Descriptions (PDF) ↗ | Pinout | 40-pin package pinout and signal descriptions |
| FD1793 Floppy Disk Controller Technical Reference ↗ | Programming | All four command types, registers, status bits explained |
| FD179X-02 Datasheet - AC Timing (PDF) ↗ | Programming | Read/write cycle and clock timing characteristics |
| WD1793 Command and Status Reference ↗ | Reference | Command/status bit tables with stepping-rate timing |
| MAME wd_fdc.cpp implementation ↗ | Source | MAME WD1772 device: PLL, timing, commands |
| ReVerSE-U9 wd1793.v Verilog core ↗ | Source | Verilog WD1793 controller core for FPGA |