Great for a restoration project or maintenance spare parts
My wordee yes, this is an old chip (late 1970’s) and of no use these days other than for restoration or servicing

NATIONAL SEMICONDUCTOR
INS1771J-1
Floppy disk controller
40 pin DIL Cerdip package
I do have the difficult to find full datasheets, including programming informationNew Old Stock
Stored and supplied on ESD foam (my tube supplies had run out)