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-
- ** N4AZI Memory Resident Maidenhead Grid Square Locator System **
- Copyright <C>1988 David C. Eanes, N4AZI
-
- 4866 Drusilla Lane
- Baton Rouge, La. 70809
-
-
- -------------------------------------------------------------------------------
- This program is offered solely for the private, non-commercial use of Amateur
- Radio Operators. The program may be distributed to others provided that there
- is no commercial interest or payment of any kind involved.
-
- *** THIS IS NOT PUBLIC DOMAIN SOFTWARE AND IS FULLY COPYRIGHTED ***
-
- If you find this program useful and are so inclined a $5.00 donation to the
- author will be greatly appreciated and will help to promote the development of
- other tools that are helpful to the Radio Amateur.
-
- -------------------------------------------------------------------------------
-
- GRID.EXE is an MS-DOS terminate and stay resident (TSR) program that calculates
- maidenhead grid squares for any given latitude and longitude or it will
- calculate longitude and latitude for any given grid square. In addition to the
- location calculations, the program also provides data on bearing and distance
- between any two locations.
-
- To load GRID.EXE into memory, simply enter 'GRID' at the DOS prompt. From this
- point the program can be called up at anytime by simultaneously pressing the
- <CTLR><ALT><G> key combination.
-
- OPERATION
-
- Once the program has been activated by pressing <CTRL><ALT><G>, there are 4
- possible commands.
-
- The 'H' command puts the user into the Home or Source data entry mode. The
- cursor moves to the Home Grid Square entry and at this point the user enters
- the Home Grid Square. The program will pad or fill in incomplete grid squares
- so that entries such as 'EM' or 'EM4' will be accepted. An entry such as
- 'EM40' is padded to 'EM40LL'. After the grid square has been entered the
- program then calculates the longitude and latitude for the supplied Grid
- Square. By simply keying <RETURN> at the Grid Square entry the cursor is moved
- to the Longitude entry position and next to Latitude entry position. Once both
- have been entered the program will calculate the correct Grid Square for that
- location.
-
- * Important note: All longitude and latitude information is entered in decimal
- degrees (ie -91.2 Long 30.5 Lat | NOT in degrees,minutes,
- seconds). West longitudes and south latitudes are entered as
- negative numbers.
-
- The 'D' command functions exactly the same as the 'H' command except that the
- user is entering data for the Destination location. Once there is data entered
- for both Home and Destination the program will automatically calculate distance
- and bearing.
-
- The 'Q' command simply halts execution of GRID.EXE and returns the user to
- whatever program he was running previously. The program remains resident in
- memory and can be re-activated at anytime with the <CTRL><ALT><G> combination.
-
- The 'U' command Uninstalls or removes the program from memory. After a 'U'
- command the program cannot be activated again until it is reloaded.
-
-
- WINDOW POSITIONING
-
- Upon initial activitation the Pop Up Window will be positioned near the upper
- left hand corner of the display. Window position may be adjusted through the
- use of the Arrow, PgUp, PgDn, Home, and End keys. Subsequent activations will
- maintain the window position that has been selected by the user.
-
-