boot_loader_openfirmware: Enable boot options by keyboard

Introduce a non-blocking function for checking keyboard input, and refactor
existing code to share the escape key translations. The comment that key-up and
key-down result in a zero char is confirmed to apply.

If the space bar is pressed, enter the boot menu. If the escape key is pressed,
disable the frame buffer and keep showing the usual debug output. Apparently
the key press must come after console/keyboard initialization but before the
"Welcome to the Haiku bootloader!" line.

Closes ticket #6140.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38304 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added console support functions required for the generic textual boot
menu. The menu basically works, but has a couple of problems. The
harmless ones are graphical: we get cursor artifacts when the colors
are changed, and the item selection doesn't quite look as it should.
More serious is the lack of Home/End, Page Up/Down keys. All I read from
the console is a '\0' byte when such a key is pressed. The cursor keys
work fortunately. I mapped the functionality of Page Up/Down
additionally to the Left/Right cursor keys. So the menu should be usable
at least. I guess, I'll leave it in that state; Axel wants a graphical
menu anyway.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15589 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Followed Ingo's suggestion and removed the now superfluous "length" correction
in ConsoleHandle::WriteAt().
* Updated license.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15581 a95241bf-73f2-0310-859d-f6bbb57e9c96

Renamed src/kernel to src/system.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@12359 a95241bf-73f2-0310-859d-f6bbb57e9c96

boot_loader_openfirmware: Enable boot options by keyboard

Introduce a non-blocking function for checking keyboard input, and refactor
existing code to share the escape key translations. The comment that key-up and
key-down result in a zero char is confirmed to apply.

If the space bar is pressed, enter the boot menu. If the escape key is pressed,
disable the frame buffer and keep showing the usual debug output. Apparently
the key press must come after console/keyboard initialization but before the
"Welcome to the Haiku bootloader!" line.

Closes ticket #6140.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38304 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added console support functions required for the generic textual boot
menu. The menu basically works, but has a couple of problems. The
harmless ones are graphical: we get cursor artifacts when the colors
are changed, and the item selection doesn't quite look as it should.
More serious is the lack of Home/End, Page Up/Down keys. All I read from
the console is a '\0' byte when such a key is pressed. The cursor keys
work fortunately. I mapped the functionality of Page Up/Down
additionally to the Left/Right cursor keys. So the menu should be usable
at least. I guess, I'll leave it in that state; Axel wants a graphical
menu anyway.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15589 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Followed Ingo's suggestion and removed the now superfluous "length" correction
in ConsoleHandle::WriteAt().
* Updated license.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15581 a95241bf-73f2-0310-859d-f6bbb57e9c96

Renamed src/kernel to src/system.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@12359 a95241bf-73f2-0310-859d-f6bbb57e9c96