The VR177X-02 is a modern plugin replacement for the WD1770/WD1772/VL1772 floppy drive controller.
VR177X-02 Features include:
- Plugin replacement.
- Low profile 28 pin DIL footprint.
- Provides the same functionality as the original WD1770/WD1772/VL1772.
- Auto switching between 8MHz and 16MHz operation.
- Full 5V TTL IO interface.
- Low power consumption.
The VR177X-02 has been successfully tested with a wide variety of applications (please contact me for a list) on the Atari STE, Atari XF551, Spectrum MGT Disciple, PlusD, Opus Discovery, the Acorn Electron Advanced Plus 3, BBC variants with the WD1770/2 floppy controller , Sinclair QL WD1770/2 based floppy interfaces (and clones) and the QL Sandy Disk.
Comapatbility testing is ongoing and more systems and interfaces are added once they pass testing. If your system or interface is not listed, and you can assist with testing (VR177X-02 samples can be provided if needed), then please contact me on support@vretrodesign.com.
For detailed specifications and application notes please refer to the datasheet
The VR177X-02 is one of several chip replacements I make for retro computer enthusiasts including the VR40007 and VR40010 for the Amstrad CPC, an AY-3-8912 replacement (including Turbo Sound model), the vLA81 for the Sinclair ZX81, the vLA82 for the Sinclair Spectrum 48K, the vLA128 for the Sinclair Spectrum 128K (Toastrack) and +2 (Grey case) and the vLA1 for the Sinclair ZX Interface 1.