WD 1770-PH-00-02 Floppy Disk Controller IC.
These are used in the Model B+, Master and Compact, as well as disk interfaces for the Model B and Electron. They're also used in the earlier Double Density Archimedes range such as A3xx, A4xx, A3000 etc. Also used in other computers such as the Atari ST.
These ICs are NOS - New Old Stock - They have never been fitted to a device. I have tested each individual IC on sale, and they work perfectly for read and write, in single and double density modes.
The item photo is a sample of the IC you will receive, but they are all the same identical part number. The ones in this sale have a date code of 8423, made in the 23rd week of 1984.
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