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Rev 3589 Rev 3626
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        jz      .free
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        jz      .free
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; We use 12 bytes for device type, interrupt pipe and interrupt packet size,
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; We use 12 bytes for device type, interrupt pipe and interrupt packet size,
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; 8 bytes for a packet and 8 bytes for previous packet, used by a keyboard.
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; 8 bytes for a packet and 8 bytes for previous packet, used by a keyboard.
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; 9. Initialize device data.
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; 9. Initialize device data.
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        mov     [ebx+device_data.intpipe], eax
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        mov     [ebx+device_data.intpipe], eax
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        push    8
 - 
 
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        pop     ecx
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        movi    ecx, 8
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        cmp     edx, ecx
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        cmp     edx, ecx
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        jb      @f
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        jb      @f
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        mov     edx, ecx
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        mov     edx, ecx
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@@:
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@@:
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        xor     eax, eax
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        xor     eax, eax
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        inc     esi
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        inc     esi
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        cmp     esi, 8
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        cmp     esi, 8
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        jb      .controlloop
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        jb      .controlloop
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.nocontrol:
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.nocontrol:
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; 3. Initialize before loop for normal keys. esi = index.
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; 3. Initialize before loop for normal keys. esi = index.
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        push    2
 - 
 
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        pop     esi
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        movi    esi, 2
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.normalloop:
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.normalloop:
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; 4. Process one key which was pressed in the previous packet.
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; 4. Process one key which was pressed in the previous packet.
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; 4a. Get the next pressed key from the previous packet.
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; 4a. Get the next pressed key from the previous packet.
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        movzx   eax, byte [ebx+esi+keyboard_data.prevpacket]
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        movzx   eax, byte [ebx+esi+keyboard_data.prevpacket]
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; 4b. Ignore special codes.
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; 4b. Ignore special codes.
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@@:
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@@:
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        ret     20
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        ret     20
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; Auxiliary procedure for keyboard_data_ready.
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; Auxiliary procedure for keyboard_data_ready.
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haskey:
 - 
 
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        push    2
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haskey:
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        pop     edx
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        movi    edx, 2
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@@:
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@@:
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        cmp     byte [ecx+edx], al
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        cmp     byte [ecx+edx], al
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        jz      @f
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        jz      @f
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        inc     edx
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        inc     edx