Stack pointer manipulation (Gforth Manual)

In the stack effects of the following words, ignore the occurences of “...” in the stack-pointer fetching words.

sp0 ( – a-addr  ) gforth-0.4 “sp-zero”

User variable – initial value of the data stack pointer.

sp@ ( S:... – a-addr ) gforth-0.2 “sp-fetch”

sp! ( a-addr – S:... ) gforth-0.2 “sp-store”

fp0 ( – a-addr  ) gforth-0.4 “fp-zero”

User variable – initial value of the floating-point stack pointer.

fp@ ( f:... – f-addr ) gforth-0.2 “fp-fetch”

fp! ( f-addr – f:... ) gforth-0.2 “fp-store”

rp0 ( – a-addr  ) gforth-0.4 “rp-zero”

User variable – initial value of the return stack pointer.

rp@ ( – a-addr ) gforth-0.2 “rp-fetch”

rp! ( a-addr – ) gforth-0.2 “rp-store”

lp0 ( – a-addr  ) gforth-0.4 “lp-zero”

User variable – initial value of the locals stack pointer.

lp@ ( – c-addr ) gforth-0.2 “lp-fetch”

C_addr is the current value of the locals stack pointer.

lp! ( c-addr – ) gforth-internal “lp-store”