* IP Subnetting by Angelo Mantellini *


What is IP Subnetting for PSION?
--------------------------------
I coded this tiny tool to learn about IP Subnetting.
It may help to understand how the Subnetmask and
Net-Address get calculated.
This program may help people who are learning
about IP addressing.


Installation
----------
Just copy the file <ipsub143.opa> to your APP/ directory.
IP-Subnetting v1.43 or higher now creates a file ans stores
the values on exit. -> (M:\OPD\ipsubnt.dat).

(only for version 1.42 or below)
This tool does not modify or load any other files. It may
also be stored to an other disk than the internal.


Warranty
--------
I give no warranty for this tool. If you use it, you do it
on your own risk.


Known Bugs
----------
Please report any bugs or suggestions.



Autor:
------
Angelo Mantellini
Bethlehemstr. 173
CH - 3018 Bern
( Switzerland )

E-Mail: amante@uniplus.ch

New Home-Page: http://www.geocities.com/SiliconValley/Peaks/5772/

Look out for ther Windows 95 version (only available from my homepage)


Thanks to:

- Erik Johansen, for posting this tool to the INTERNET
  - news: comp.binaries.psion
  - ftp:  ftp://ftp.it.dtu.dk/pub/psion/1997/index.html

- Glen A. Wilson, for giving me new ideas to improve my tool.

- Roland Beuggert, for beta testing.

- Steve Lilley for the new icon.

- Thanks to all PSION user, for using, spreading and for giving
  feedback.


History:
-------

15-03-1998, v1.43 - Stores values (to M:\OPD\ipsubnt.dat) on exit
                  - New official icon created by Steve Lilley
15-09-1997, v1.42 - Small cosmetic changes on main screen
                  - Fixed problem when exiting input dialog
                    for bit-mask without a value set
                  - Removed WELCOME screen (getting naggy)
                  - Fixed bug with mask-values "128 & 254"
                  - Adapted input window for subnetmask
10-09-1997, v1.41 - Added new option to enter the bit-value for the
                    subnetmask.
08-09-1997, v1.41 - Removed dialog when quitting program.
                  - Disabled Subnetting with values 128 & 254
                  - Modified option that shows possible subnets
                    for selected IP-Class (max-2).
                  - Activated shortcuts for menu options.
05-09-1997, v1.4  - It shows now how many subnets are possible
                    with choosen subnetmask.
                  - Modified input fields for subnetmask, according
                    to IP-Class choosen.
                  - Calculates correct values for the subnetmask when
                    entering a wrong value (next higher value)
03-09-1997, v1.4  - Modified input mode for IP-Address and Subnetmask
                  - Added a help menu with options showing the IP-Classes
                    and info about the values for the subnetmask
09-08-1997, v1.3b - Defined IP-Classes (avoids wrong IP-Class values)
                  - (not yet finished)
06-08-1997, v1.3b - First eight bits of the Subnetmask are always set
                  - Shows network class A/B/C (X = IP-Range Error)
                  - Modified Dialogs (Welcome / About)
                  - First error handling to avoid invalid Subnetmasks
02-08-1997, V1.2b - Minor changes on the outfit
28-07-1997, v1.1b - Added Bits counter for Subnetmask
28-05-1997, v1.0b - First Release to friends