0
 0
Used so often that zero is defined as a
constant.
0< ANS
n  flag
Flag is true if n is less than zero.
0<> ANS
x  flag
Flag is true if n is not zero, and flag is false if n is zero.
The true/false status of the item on the stack is unchanged but 0<> may be necessary before
a logical operation. E.g.
: TEST
81A0 C@ 4 AND 0<>
81B0 C@ 8 AND 0<>
AND ;
This returns true if both bit 2 of
input 81A0 and bit 3 of 81B0 are both logic 1. 0<>
is equivalent to 0= 0= .
0= ANS
x  flag
Flag is true if x is equal to zero.
0> ANS
n  flag
Flag is true if n is greater than zero.
0AT

Used with LCD displays. Clears the user
variable AT which determines where the next character on the LCD will
be written. Sets the first position.
0TIME

Uses Free Running Timer 3. Use only in
a colon definition together with ?TIME to measure execution time of a word in microseconds. Will
not upset timekeeping of onboard clock. See ?TIME .
1
 1
Used so often that one is defined as a
constant.
1+ ANS
n1  n2 or
u1  u2
Add 1 to n1 or u1 giving the sum n2 or
u2.
1 ANS
n1  n2 or
u1  u2
Subtract 1 from n1 or u1 giving the difference
n2 or u2.
2
 2
Used so often that two is defined as a
constant.
2! ANS
x1 x2 aa 
Store the 32bit pair x1 x2 at aligned
address aa with x2 at aa and x1 at aa+2.
2* ANS
x1  x2
x2 is the result of shifting x1 one bit
left, filling the vacated least significant bit with zero.
2+
n1  n2 or
u1  u2
Add 2 to n1 or u1 giving the sum n2 or
u2.
2
n1  n2 or
u1  u2
Subtract 2 from n1 or u1 giving the difference
n2 or u2.
2/ ANS
x1  x2
x2 is the result of shifting x1 one bit
right, leaving the most significant bit unchanged.
232OFF

Disconnect power from RS232 driver chip.
232ON

Connect power to RS232 driver chip.
2>R ANS
EXECUTION: x1 x2  R:  x1 x2
Transfer cell pair x1 x2 to the return
stack. Equivalent to SWAP >R >R .
2@ ANS
aa  x1 x2
Fetch the 32bit pair x1 x2 from aligned
address aa. x2 is stored at aa and x1 at aa+2.
2CONSTANT ANS
d '<spaces>name' 
Create a definition for name with the execution
action defined below.
name EXECUTION:  d
Place d on the stack.
2DEC,

Assembler instruction, see assembler section
and ADD:Q in Programming Manual. ADD:Q # 2 in Hitachi code.
Syntax examples:
R2 2DEC, \ Subtract 2 from
\ register 2
B $FF00 )) 2DEC, \ Subtract
\ 2 from byte at
\ address hex FF00
2DROP ANS
x1 x2 
Drop the 32bit pair x1 x2 from the stack.
2DUP ANS
x1 x2  x1 x2 x1 x2
Duplicate the 32bit pair x1
x2.
2INC,

Assembler instruction, see assembler section and ADD:Q in Programming
Manual. ADD:Q # 2 in Hitachi code. Examples:
R2 2INC, \ Add 2 to
\ register 2
B $FF00 )) 2INC, \ Add 2 to
\ byte at address FF00
2LITERAL ANS
COMPILATION: d 
Append the runtime action to current
definition.
RUNTIME:  d
Place d on the stack.
2OVER ANS
x1 x2 x3 x4  x1 x2 x3 x4 x1 x2
Copy the 32bit pair x1 x2 to the top of
the stack.
2R> ANS
EXECUTION:  x1 x2 R: x1 x2 
Transfer cell pair x1 x2 from the return
stack. Equivalent to R> R> SWAP .
2R@ ANS
EXECUTION:  x1 x2 R: x1 x2  x1 x2
Copy cell pair x1 x2 from return stack
to data stack. Equivalent to
R> R> 2DUP >R >R SWAP
2ROT ANS
d1 d2 d3  d2 d3 d1
Rotate the top three cell pairs.
2SWAP ANS
x1 x2 x3 x4  x3 x4 x1 x2
Exchange the top two 32bit pairs.
2VARIABLE ANS
'<spaces>name' 
Create a definition for name. Reserve two cells of data space
(uninitialised at compiletime).
name EXECUTION:  aa
aa is the address of the first, lowest
addressed, reserved cell. A program should initialise the contents.
3
 3
Used so often that three is defined as
a constant.
