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92 lines
3 KiB
Markdown
92 lines
3 KiB
Markdown
Simple DirectMedia Layer 2 for OS/2 & eComStation
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================================================================================
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SDL port for OS/2, authored by Andrey Vasilkin <digi@os2.snc.ru>, 2016
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OpenGL not supported by this port.
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Additional optional environment variables:
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SDL_AUDIO_SHARE
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Values: 0 or 1, default is 0
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Initializes the device as shareable or exclusively acquired.
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SDL_VIDEODRIVER
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Values: DIVE or VMAN, default is DIVE
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Use video subsystem: Direct interface video extensions (DIVE) or
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Video Manager (VMAN).
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You may significantly increase video output speed with OS4 kernel and patched
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files vman.dll and dive.dll or with latest versions of ACPI support and video
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driver Panorama.
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Latest versions of OS/4 kernel:
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http://gus.biysk.ru/os4/
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(Info: https://www.os2world.com/wiki/index.php/Phoenix_OS/4)
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Patched files vman.dll and dive.dll:
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http://gus.biysk.ru/os4/test/pached_dll/PATCHED_DLL.RAR
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Compiling:
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----------
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Open Watcom 1.9 or newer is tested. For the new Open Watcom V2 fork, see:
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https://github.com/open-watcom/ and https://open-watcom.github.io
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WATCOM environment variable must to be set to the Open Watcom install
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directory. To compile, run: wmake -f Makefile.os2
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Installing:
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-----------
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- eComStation:
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If you have previously installed SDL2, make a Backup copy of SDL2.dll
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located in D:\ecs\dll (where D: is disk on which installed eComStation).
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Stop all programs running with SDL2. Copy SDL2.dll to D:\ecs\dll
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- OS/2:
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Copy SDL2.dll to any directory on your LIBPATH. If you have a previous
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version installed, close all SDL2 applications before replacing the old
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copy. Also make sure that any other older versions of DLLs are removed
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from your system.
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Joysticks in SDL2:
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------------------
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The joystick code in SDL2 is a direct forward-port from the SDL-1.2 version.
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Here is the original documentation from SDL-1.2:
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The Joystick detection only works for standard joysticks (2 buttons, 2 axes
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and the like). Therefore, if you use a non-standard joystick, you should
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specify its features in the SDL_OS2_JOYSTICK environment variable in a batch
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file or CONFIG.SYS, so SDL applications can provide full capability to your
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device. The syntax is:
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SET SDL_OS2_JOYSTICK=[JOYSTICK_NAME] [AXES] [BUTTONS] [HATS] [BALLS]
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So, it you have a Gravis GamePad with 4 axes, 2 buttons, 2 hats and 0 balls,
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the line should be:
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SET SDL_OS2_JOYSTICK=Gravis_GamePad 4 2 2 0
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If you want to add spaces in your joystick name, just surround it with
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quotes or double-quotes:
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SET SDL_OS2_JOYSTICK='Gravis GamePad' 4 2 2 0
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or
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SET SDL_OS2_JOYSTICK="Gravis GamePad" 4 2 2 0
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Note however that Balls and Hats are not supported under OS/2, and the
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value will be ignored... but it is wise to define these correctly because
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in the future those can be supported.
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Also the number of buttons is limited to 2 when using two joysticks,
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4 when using one joystick with 4 axes, 6 when using a joystick with 3 axes
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and 8 when using a joystick with 2 axes. Notice however these are limitations
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of the Joystick Port hardware, not OS/2.
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