Technical keyboard stuff about TV lib.

[salvador <sal...@in...>]

Hi All:

There are a known race when a user debugs an Allegro application using
RHIDE. This race is between the keyboard handlers of BIOS and Allegro. The
problem is that Ctrl+F9 is the shortcut and then BIOS sees the Ctrl key-down
message, but not the key-up. So when you hit a breakpoint and BIOS gets the
control again the Ctrl key remains pressed because the key-up message was
absorved by Allegro.
It can be solved from the Allegro side like this:
If a key-up message is received before a key-down and it belongs to a
modifier key clean this bit in the variable that holds the BIOS state.
But it can be solved in TV like this:
In the Resume we could just clean any keys modifier, after all you shouldn't
expect that a amodifier will survive to a suspend/resume of the library.
Opinions?

SET

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Salvador Eduardo Tropea (SET). (Electronics Engineer)
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