PlanckForth: Bootstrapping Forth from Handwritten Binary

$ make

$ cat helloworld.fs | ./plank

Builtin Words

code	name	stack effect	semantics
Q	quit	( -- )	Exit the process
C	cell	( -- n )	The size of Cells
h	here	( -- addr )	The address of 'here' cell
l	latest	( -- addr )	The address of 'latest' cell
k	key	( -- n )	Read character
t	type	( n -- )	Print character
j	jump	( -- )	Unconditional branch.
J	0jump	( a -- )	Jump if a == 0.
f	find	( c -- xt )	Get execution token of c
x	execute	( xt -- ... )	Run the execution token
@	fetch	( addr -- a )	Load value from addr
!	store	( a addr -- )	Store value to addr
?	cfetch	( addr -- c )	Load byte from addr
$	cstore	( c addr -- )	Store byte to addr
d	dfetch	( -- addr )	Get data stack pointer
D	dstore	( addr -- )	Set data stack pointer
r	rfetch	( -- addr )	Get return stack pointer
R	rstore	( addr -- )	Set return stack pointer
{	dtor	( a -- R:a )	Push value to return stack
}	rtod	( R: -- a )	Pop value from return stack