0:41Ah                   Keyboard Buffer Head Pointer

Length: 2 bytes

This word points to the next character code/scan code to be removed
from the keyboard buffer. If the head pointer is equal to the tail
pointer (0:41Ch), then the buffer is empty.

See also: INT 16h, 00h
See also: 0:41Ch
See also: 0:41Eh
See also: 0:480h
See also: 0:482h

0:41Ah Keyboard Buffer Head Pointer