18
1 - 1 Before Starting Calculations...
kk
kk
k Stacks
The unit employs memory blocks, called
stacks
, for storage of low priority values
and commands. There is a 10-level
numeric value stack
, a 26-level
command
stack
, and a 10-level
program subroutine stack
. An error occurs if you perform a
calculation so complex that it exceeds the capacity of available numeric value
stack or command stack space, or if execution of a program subroutine exceeds
the capacity of the subroutine stack.
Example
•Calculations are performed according to the priority sequence. Once a
calculation is executed, it is cleared from the stack.
•Storing a complex number takes up two numeric value stack levels.
•Storing a two-byte function takes up two command stack levels.
kk
kk
k Input, Output and Operation Limitations
The allowable range for both input and output values is 10 digits for the mantissa
and 2 digits for the exponent. Internally, however, the unit performs calculations
using 15 digits for the mantissa and 2 digits for the exponent.
Example 3 × 10
5
÷ 7 – 42857 =
AdEf/hw
dEf/h-
ecifhw
1
2
3
4
5
b
c
d
e
f
g
h
2
3
4
5
4
×
(
(
+
×
(
+
...
...
Numeric Value Stack Command Stack
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