0:482h                   Keyboard Buffer End Offset Pointer

Length: 2 bytes

This word contains the offset of the end of the keyboard buffer plus
one. This allows you to move the buffer, increase its size, or
decrease its size. There is one catch, however: The address here is an
offset starting at address 0:400h. For example, the default 32-byte
buffer at 0:41Eh forces this offset address to be 003Eh (20h for the
32-byte buffer itself). Therefore, if the buffer is to be moved to
another location, the buffer ending offset must be relative to 0:400h.

See also: 0:41Ah
See also: 0:41Ch
See also: 0:41Eh
See also: 0:480h

0:482h Keyboard Buffer End Offset Pointer