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-
- User Bulletin:IMAPACHE002-3
-
- Apache - April 25, 1996 - Head To Head Using a Modem
-
- A new patch is available for Apache which enhances the Head to Head play
- over a modem. This patch is available via download of the file: apchptch.exe.
- Both players must have the new version downloaded onto their machines to play
- Head to Head via modem.
-
- Improvements:
-
- - Modem communications have implemented a "Guaranteed Packet Delivery"
- system. This allows the game to detect and retransmit dropped or corrupt
- data passed between the two players. This corrects many of the lockup
- and aborting problems of previous versions.
- - Enhanced machine to machine communications during the startup and menu
- screens after the connection is established. This adds several features:
- only one player needs to press the "Start Game" on the menu screen or
- "Exit" on the map screen, and both machines respond; errors in mode
- selection can be corrected and the game started again; once a game is
- over the modes can be changed and restarted without breaking the connection.
- - In Leader/Wingman mode, when one of the players dies, that player will
- assume a "chase view" and watch the surviving player complete the mission.
-
- Installation:
- Floppy
- - Place the floppy in drive.
- - Select the floppy drive (e.g. A:)
-
- Internet
- - Create a temporary directory.
- - Change directory to the new directory (e.g. cd <tempdir>).
- - Download the apchptch.exe file into the new directory.
- - Type: apchptch.exe
- This will extract the files into the current temporary directory.
-
- Both Floppy and Internet
- - Type: UPDATE <optional directory name>
- which will install the new Apache.bat, Apache95.exe, and Prefs.cfg
- files into the c:\di\apache\ or <optional directory name> directory.
- - Change directory to the Apache directory (e.g. c:\di\apache\).
- - Run "Apache" and reenter the Preferences screen information.
- - When entering the two player screen for the first time, be sure to select
- the proper "COM" port, (and IRQ if non standard), prior to pressing the
- "Modem" button. When the wrong COM port is selected, a "Time out" error
- will occur several times and then prompt the user to validate the modem
- connection. Press the "Direct" button and select an alternate COM port.
- For external modems, always check that the modem is connected and turned
- on.
-
- General:
- Modem communications are always a problem to resolve due to the sheer number
- of different modems and phone companies. The following recommendations are
- provided to enhance Apache's performance and improve the Head to Head game
- play.
-
- - Insure all connections to external modems and to the phone line are well
- seated and tight.
- - Select the initialization sequence that best matches your modem. (i.e. all
- responses are "OK" with no errors).
- - Select a speed that is equal to or at most one speed higher than the
- expected line connection speed. Example: the expected connection is
- 28,800bps, select the modem communication of 28,800bps, or 38,400bps at
- most. Increasing the modem to computer communication speed may actually
- decrease the performance of the game.
- - If an external modem is used, watch the receive / transmit lights during
- the initial parts of the game. If the lights hesitate at a constant rate,
- the connection is fairly good. If the lights flicker with unsteady beats,
- or intermittent hesitation, the line connection is noisy. It may be wise
- to exit the game, (e.g. Cntl Q), and hang up the modem, (e.g. hang up
- button), and re-dial to get a new connection. Once a good connection is
- made, you can hang on to it when exiting the game and starting a new game.
- - If a connection is lost for any reason, and the menu screen indicates that
- it has reinitialized, depress the "hangup modem" button and then the
- "Modem" button to be sure everything is reset. This may not be necessary,
- but is performed just to be sure everything is still OK.
-
-
- Advanced:
- - Review your modem manual and the selected initialization sequence to ensure
- the following modes are selected:
- - CTS/RTS hardware hand shake enabled.
- - V.42/MNP4 or other error correction negotiated between modems.
- - Data Compression disabled. Data compression at higher speeds may slow
- frame rate.
- - If the modem has a programmable "line quality monitor / retrain" mode,
- turn it off. Look for "%E0" for Hayes compatible modems This works
- well for bulk data transfers like file downloads, but in time critical,
- low latency dependent transmissions like game play, the modem changing
- baud rates or error correction style can be fatal. A single "retraining"
- cycle for a modem can be several seconds. This time delay may cause the
- game to "time out". Secondly, if the resultant negotiations result in a
- much slower Baud rate, each data transmission, (i.e. packet), could
- "time out" on every transfer since the game was calibrated to the initial
- connection response times. An additional selection window has been added
- for this purpose, "Hayes X-Retrain".
- - With US Robotics modems, it is recommended that you force the modem to
- modem baud rate to a non standard baud rate (i.e. not 14400, or 28,800).
- Modem to modem baud rates of 12000, 24000, or 21600 work much better.
- This is accomplished by adding a AT&N7, AT&N12, or AT&N11 respectively
- via the command field. Two additional modem selections have been added
- for this purpose, "US Robotics 14.4", and "US Robotics 28.8".
- - Observe that no errors are reported during initialization. If so, correct
- them.
-
-
- Other Improvements:
- - The bug which caused the pilot log to omit some completed campaigns has
- been fixed.
- - Joystick polling has been adjusted to avoid problems with the mouse
- functioning improperly on the preferences screen.
- Should this problem persist, try using the /j parameter followed
- by a number between 0 and 10000.
- Ex: Apache /J500
- - A new parameter, /Q, can be used to change the orientation of
- the throttle.
- Ex: Apache /Q1 or Apache /Q0
-