Architecture,
Assembly
Language,
And
Hardware
Interfacing
(Paperback)
The Stack Pointer (SP)
The
Stack
Pointer,
like all
registers
except
DPTR and
PC, may
hold an
8-bit
(1-byte)
value.
The
Stack
Pointer
is used
to
indicate
where
the next
value to
be
removed
from the
stack
should
be taken
from.