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  * eax = 2 - function number
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  * eax = 2 - function number
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Returned value:
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Returned value:
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  * if the buffer is empty, function returns eax=1
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  * if the buffer is empty, function returns eax=1
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  * if the buffer is not empty, function returns al=0,
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  * if the buffer is not empty, function returns al=0,
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    ah=code of the pressed key,
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    ah=code of the pressed key,
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    bits 16-23 = contain scancode for pressed key,
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    bits 16-23 = contain scancode for pressed key in ASCII mode,
- 
 
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                 in the scancodes mode this bits cleared.
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    bits 23-31 = zero
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    bits 23-31 = zero
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  * if there is "hotkey", function returns al=2,
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  * if there is "hotkey", function returns al=2,
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    ah=scancode of the pressed key (0 for control keys),
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    ah=scancode of the pressed key (0 for control keys),
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    high word of eax contains a status of control keys at the moment
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    high word of eax contains a status of control keys at the moment
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    of pressing a hotkey
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    of pressing a hotkey