PETCALC

This is RPN calculator using x87 inside your i486 and above
processor. This is a DOS program and may run in DOS prompt.

The software is provided _as is_, without documentation and
source code and warranty. If you are interested in modifying
this program you may have the source code for USD 25 and the
source code will be emailed to you.

You also need PET4TH that can be downloaded from
www.geocities.com/petrusp_id . And this too without
documentation and source code and warranty.

In the sample below, do not press <space bar> for any space
that you see since it is for human not for computer. Example:
1 <enter> 2 +
is typed as '1' then 'enter/return' then '2' then '+'.
It is better that NumLock is on, CapsLock is off.

Type: petcalc
  to start the program.

1 + 2 =
type: 1 <enter> 2 +

3 x 4 =
type: 3 <enter> 4 *

(1+2) x (3+4) =
type: 1 <enter> 2 + 3 <enter> 4 + *

(5x6) + (7x8) =
type: 5 <enter> 6 * 7 <enter> 8 * +

2 x 56 =
4 x 23 =
3 x 16 =
---------- +
type: 2 <enter> 56 * 4 <enter> 23 * + 3 <enter> 16 * +
or
type: z l 2 <enter> 56 * <rightarrow> 4 <enter> 23 *
<rightarrow> 3 <enter> 16 * <rightarrow>
note: l is lowercase L for list
use <leftarrow> to put the total to register X
use all four cursor keys to use the list as extra memories,
beside register M

125 + 10% of 125 =
type: 125 <enter> 10 p p +

125 is mark up by 10% =
type: 125 <enter> 10 p m
note: if the result is deducted 10%, it is 125
type: 10 p p -

pi
type: c p

That's all folks. It is so easy to use.
