What on earth is an 'fword ptr'? [duplicate]

Question

I was running a game's executable file through a disassembler and saw the following instruction:

1090103D: FF 6D 77           jmp         fword ptr [ebx+77h]

I'm used to seeing byte ptr (8-bit), word ptr (16-bit), dword ptr (32-bit) and qword ptr (64-bit) in disassembly dumps.

The term "F-word" has a slightly different meaning to me; does anyone know what it means in this context?

Answer 1

It is a 48 bit pointer used in a far jump. It indicates it is a jump to a 16 bit segment/selector address with an associated offset address.