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and were intended for 8-inch (203 mm) and 5.25-inch (133 mm) drives. The WD1770, WD1772, and WD1773 added an internal digital data separator and write precompensator...

1581 is similar enough to the MS-DOS format as the 1581 is built around a WD1770 FM/MFM floppy controller chip. The 1581 disk format consists of 80 tracks...

more widely available. The drive uses the CPU MOS 6502, floppy controller WD1770 or WD1772, I/O controllers 2x MOS Technology 6522 and 1x MOS Technology...

gate array to correct this digitally. The drive uses the MOS 6502 CPU, WD1770 or WD1772 floppy controller, 2x MOS Technology 6522 I/O controllers and...

interface based initially on the Intel 8271 controller and later on the WD1770, also requiring the installation of the Disc Filing System (DFS) ROM (and...

early 1980s that low-cost all-in-one MFM floppy drive controllers like the WD1770 emerged. This led to the rapid demise of FM encoding in favor of MFM by...

Advanced Disc Filing System when support for floppy discs was added (using a WD1770 floppy disc controller) and on later 32-bit systems a variant of a PC-style...

released alternative versions of the BBC disks that are compatible with the WD1770. In addition to this, self-modifying code was used as part of the protection...

earlier version but added a set of extra commands and supported the improved WD1770 floppy drive controller chip. DFS conventionally uses one side of a double-density...

number of simple external components to implement a complete system. The WD1770 was the first to implement a complete MFM solution in a single chip. FM...

with the Plus 3. The double-density drive of the Plus 3 was driven using a WD1770 drive controller by the ADFS. (The Plus 3 had been rumoured to offer Acorn's...

BBC Micro's state: main, shadow and expansion bus memory, the CPU and the WD1770 floppy drive controller; also the Electron ULA and the Slogger Master RAM...

instead of the black and gray used on the Models I/III. The Model 4 uses WD1770/1773 floppy controllers instead of the WD1791, which allows for a larger...

cartridge slots floppy disc drives (both DFS and the newer ADFS supported) with WD1770 disc controller tape interface (with motor control), using a variation of...

controller allowed connection of 5.25" disk drives. The controller used the WD1770 clocked at 8 MHz. The DOS ROM was selected between address $C000-$DFFF and...

RAM (64K RAM on the FDD 3000) 128 bytes ROM (boots system from floppy) WD1770 floppy disk controller WD2123 UART (2 serial ports) Adamski, Jarek (2009)...