mouse.inc

MenuetOS是一个用汇编开发的32/64位PC操作系统

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;;
;;   Mouse.inc
;;
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kb_read:

        push    ecx edx

        mov     ecx,0xffff
      kr_loop:
        in      al,0x64
        test    al,1
        jnz     kr_ready
        loop    kr_loop
        mov     ah,1
        jmp     kr_exit
      kr_ready:
        push    ecx
        mov     ecx,32
      kr_delay:
        loop    kr_delay
        pop     ecx
        in      al,0x60
        xor     ah,ah
      kr_exit:

        pop     edx ecx

        ret


kb_write:

        push    ecx edx

        mov     dl,al
        mov     ecx,0xffff
      kw_loop1:
        in      al,0x64
        test    al,0x20
        jz      kw_ok1
        loop    kw_loop1
        mov     ah,1
        jmp     kw_exit
      kw_ok1:
        in      al,0x60
        mov     ecx,0xffff
      kw_loop:
        in      al,0x64
        test    al,2
        jz      kw_ok
        loop    kw_loop
        mov     ah,1
        jmp     kw_exit
      kw_ok:
        mov     al,dl
        out     0x60,al
        mov     ecx,0xffff
      kw_loop3:
        in      al,0x64
        test    al,2
        jz      kw_ok3
        loop    kw_loop3
        mov     ah,1
        jmp     kw_exit
      kw_ok3:
        mov     ah,8
      kw_loop4:
        mov     ecx,0xffff
      kw_loop5:
        in      al,0x64
        test    al,1
        jnz     kw_ok4
        loop    kw_loop5
        dec     ah
        jnz     kw_loop4
      kw_ok4:
        xor     ah,ah
      kw_exit:

        pop     edx ecx

        ret


kb_cmd:

        mov     ecx,0xffff
      c_wait:
        in      al,0x64
        test    al,2
        jz      c_send
        loop    c_wait
        jmp     c_error
      c_send:
        mov     al,bl
        out     0x64,al
        mov     ecx,0xffff
      c_accept:
        in      al,0x64
        test    al,2
        jz      c_ok
        loop    c_accept
      c_error:
        mov     ah,1
        jmp     c_exit
      c_ok:
        xor     ah,ah
      c_exit:
        ret


setmouse:  ; set mousepicture -pointer
           ; ps2 mouse enable

     mov     [0xf200],dword mousepointer

     cli
     mov     bl,0xa8                 ; enable mouse cmd
     call    kb_cmd
     call    kb_read                 ; read status

     mov     bl,0x20                 ; get command byte
     call    kb_cmd
     call    kb_read
     or      al,3                    ; enable interrupt
     mov     bl,0x60                 ; write command
     push    eax
     call    kb_cmd
     pop     eax
     call    kb_write

     mov     bl,0xd4                 ; for mouse
     call    kb_cmd
     mov     al,0xf4                 ; enable mouse device
     call    kb_write
     call    kb_read           ; read status return

 ;;     ret

     ; com1 mouse enable

     mov   bx,0x3f8 ; combase

     mov   dx,bx
     add   dx,3
     mov   al,0x80
     out   dx,al

     mov   dx,bx
     add   dx,1
     mov   al,0
     out   dx,al

     mov   dx,bx
     add   dx,0
     mov   al,0x30*2    ; 0x30 / 4
     out   dx,al

     mov   dx,bx
     add   dx,3
     mov   al,2         ; 3
     out   dx,al

     mov   dx,bx
     add   dx,4
     mov   al,0xb
     out   dx,al

     mov   dx,bx
     add   dx,1
     mov   al,1
     out   dx,al


     ; com2 mouse enable

     mov   bx,0x2f8 ; combase

     mov   dx,bx
     add   dx,3
     mov   al,0x80
     out   dx,al

     mov   dx,bx
     add   dx,1
     mov   al,0
     out   dx,al

     mov   dx,bx
     add   dx,0
     mov   al,0x30*2
     out   dx,al

     mov   dx,bx
     add   dx,3
     mov   al,2
     out   dx,al

     mov   dx,bx
     add   dx,4
     mov   al,0xb
     out   dx,al

     mov   dx,bx
     add   dx,1
     mov   al,1
     out   dx,al

     ret




combine_colors:

      ; in
      ; ecx - color ( 00 RR GG BB )
      ; edi - ref to new color byte
      ; esi - ref to alpha byte
      ;
      ; out
      ; ecx - new color ( roughly (ecx*[esi]>>8)+([edi]*[esi]>>8) )

      push eax
      push ebx
      push edx
      push ecx
      xor ecx, ecx
         ; byte 2
      mov eax, 0xff
      sub al, [esi+0]
      mov ebx, [esp]
      shr ebx, 16
      and ebx, 0xff
      mul ebx
      shr eax, 8
      add ecx, eax
      xor eax, eax
      xor ebx, ebx
      mov al, [edi+0]
      mov bl, [esi+0]
      mul ebx
      shr eax, 8
      add ecx, eax
      shl ecx, 8
         ; byte 1
      mov eax, 0xff
      sub al, [esi+1]
      mov ebx, [esp]
      shr ebx, 8
      and ebx, 0xff
      mul ebx
      shr eax, 8
      add ecx, eax
      xor eax, eax
      xor ebx, ebx
      mov al, [edi+1]
      mov bl, [esi+1]
      mul ebx
      shr eax, 8
      add ecx, eax
      shl ecx, 8
         ; byte 2