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Rev 479 Rev 486
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;**************************************
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;**************************************
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;* ÎÁÐÀÁÎÒ×ÈÊ ÏÐÅÐÛÂÀÍÈß ÎÒ ÌÛØÈ PS/2 *
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;* IRQ HANDLER FOR PS/2 MOUSE         *
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;**************************************
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;**************************************
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proc irq_handler
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proc irq_handler
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        call    Wait8042BufferEmpty  ;î÷èñòêà áóôåðà
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        call    Wait8042BufferEmpty  ;clear buffer
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        in      al,0x60              ;ïîëó÷èòü ñêýí-êîä
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        in      al,0x60              ;get scan-code
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        cmp     [mouse_byte],0
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        cmp     [mouse_byte],0
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        cmp     [mouse_byte],3
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        cmp     [mouse_byte],3
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        je      .byte4
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        je      .byte4
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        jmp     .error
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        jmp     .error
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  .byte1:
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  .byte1:
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        test    al,1000b             ;ïåðâûé áàéò ïîñûëêè?
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        test    al,1000b             ;first byte?
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        jz      .error               ;ñáîé ñèíõðîíèçàöèè
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        jz      .error
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        mov     [first_byte],al
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        mov     [first_byte],al
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        inc     [mouse_byte]
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        inc     [mouse_byte]
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        jmp     .exit
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        jmp     .exit
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  .z_moving:
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  .z_moving:
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        movsx   eax,al
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        movsx   eax,al
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        mov     [ZMoving],eax
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        mov     [ZMoving],eax
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  .xy_moving:
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  .xy_moving:
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        mov     ah,0   ;äóáëèðóåì çíàê âî âñå ðàçðÿäû AH
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        mov     ah,0
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        mov     al,[first_byte]
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        mov     al,[first_byte]
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        test    al,10000b
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        test    al,10000b
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        jz      @f
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        jz      @f
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        mov     ah,0FFh
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        mov     ah,0FFh
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    @@:
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    @@:
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        mov     al,[second_byte]
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        mov     al,[second_byte]
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        cwd
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        cwd
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        mov     [XMoving],eax
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        mov     [XMoving],eax
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        mov     ah,0   ;äóáëèðóåì çíàê âî âñå ðàçðÿäû AH
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        mov     ah,0
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        mov     al,[first_byte]
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        mov     al,[first_byte]
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        ret
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        ret
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endp
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endp
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;***********************************************
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;***********************************************
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;*   ÎÆÈÄÀÍÈÅ Î×ÈÑÒÊÈ ÂÕÎÄÍÎÃÎ ÁÓÔÅÐÀ I8042    *
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;*   Waiting for clearing I8042 buffer         *
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;* Ïðè âûõîäå èç ïðîöåäóðû:                    *
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;* Retutned state:                             *
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;* ôëàã ZF óñòàíîâëåí - íîðìàëüíîå çàâåðøåíèå, *
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;* ZF is set - good ending,                    *
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;* ôëàã ZF ñáðîøåí - îøèáêà òàéì-àóòà.         *
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;* ZF is cleared - time-out error.             *
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;***********************************************
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;***********************************************
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Wait8042BufferEmpty:
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Wait8042BufferEmpty:
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        push ecx
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        push ecx
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        xor  ecx,ecx
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        xor  ecx,ecx
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      @@:
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      @@:
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        in     al,64h
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        in     al,64h
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        test   al,00000010b
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        test   al,00000010b
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        loopnz @b
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        loopnz @b