Linux Serial HOWTO ��Ķ��: �گ�ϥζW�L��Ӫ��C�˸m��?

8. �گ�ϥζW�L��Ӫ��C�˸m��?

�A��ݭn�\Ū�o�@�`�A��D�A�Q�n�ϥΤT�өΧ�h��C�]��...(��w�A�S��h��d��)�D

��p�A��t�@�Ӧh�l��C��A�O��A�A�i�H�D �A�i�H�ϥΪ��C��ƥب��ڭ̥��ϥΪ��w�餤�_�n�D�H�ΰ��X�J��}��ƥءD �o�ä��O Linux ��A�ӬO PC �׬y�ƪ��D��w��_��}��C�@�Ӧ�C�]�ơD ��C�]�ƥi�H�O��C��A��ƾھ��άO�h��d�D

�h��d�O��F�֦��\�h�Ӧ�C��Ӥ��ɥd�W�Ҧ��C��ҨϥΪ��ۦP IRQ �ӯS�O�]�p��D Linux ��d�W��C�@�Ӱ�ϥΤ��P��X�J��}�H�K�q��ơD

�A�� PC �@��|�N ttyS0 �H�� ttyS2 �]�b IRQ 4 �ӱN ttyS1 �H�� ttyS3 �]�b IRQ 3�D �g��˵� /proc/interrupts �A�i�H��D�� IRQs ��Q�ϥΡD �n�ϥΨ�ӥH�W��C�]�ƪ��ܡA�A��s��w�@�Ӥ��_�D �@�Ӧn��ܬO�q�A��æC��䭫�s��w�@�Ӥ��_�D�A�� PC �@��|�]�w IRQ5 �άO IRQ7 ��A��æC��A��O�ܤ֤H�|�ϥΨ�ӨæC��D �A�i�H��s��w�䤤�@�Ӥ��_��C�]�ơA�æӤ��M�බ�Q�a�ϥΤ@�ӨæC��D �A�N�|�ݭn�Ψ� setserial �{��Ӱ��o��ơD��~�A�A��վ�A�O�l�W��]�w(Jumpers)�A�d�ݧA�D��O��D ��A�Q�n��C�Ӱ�ϥΪ� IRQ�D

�A�N�o�n��ǳ]�w��C�Ӧ�C�]�Ƴ��@�ӡA�åB�O�ߤ@��@�Ӥ��_�D �o�̬O�ڦb /etc/rc.d/rc.local �̩ҥΪ��]�w - �A��Ӧb�Ұʨt�ήɪ��Y�Ӧa�谵�o��ơD


        /sbin/setserial /dev/ttyS0 irq 3        # my serial mouse
        /sbin/setserial /dev/ttyS1 irq 4        # my Wyse dumb terminal
        /sbin/setserial /dev/ttyS2 irq 5        # my Zoom modem 
        /sbin/setserial /dev/ttyS3 irq 9        # my USR modem

�зǪ� IRQ ��w:

              IRQ  0    Timer channel 0
              IRQ  1    Keyboard
              IRQ  2    Cascade for controller 2
              IRQ  3    Serial port 2
              IRQ  4    Serial port 1
              IRQ  5    Parallel port 2
              IRQ  6    Floppy diskette
              IRQ  7    Parallel port 1
              IRQ  8    Real-time clock
              IRQ  9    Redirected to IRQ2
              IRQ 10    not assigned 
              IRQ 11    not assigned
              IRQ 12    not assigned
              IRQ 13    Math coprocessor
              IRQ 14    Hard disk controller 1
              IRQ 15    Hard disk controller 2

�b��ܤ��_�ɯu��S��򥿽T��D�u�n�T�w��O�w�g�Q�D��O�A�άO�䥦�ɭ��d�ҨϥΡD 2, 3, 4, 5 �άO 7 �O�n��ܡD``not assigned''��N��O�ثe�èS��F��b�зǱ��p�U�|�T�w�ϥγo�ǵw�餤�_�n�D�D �]�n�`�N�� IRQ 2 �� IRQ 9 �O�@�˪��D�A�i�H�٥�� 2 �� 9�A��C�X�ʵ{��D�`�F�ѳo�@�I�D �p�G�A��@�� 16-bit �׬y�Ƴs��Y��C�d�A�A�]�i�H�ϥ� IRQ 10, 11, 12 �� 15�D

�u�n�T�w�A�ϥΪ��ëD�O IRQ 0, 1, 6, 8, 13 �άO 14! ��̬O�ѧA��D��O�ҨϥΪ��D �p�G�A��o�� IRQs ��ܡA�|�ϱo�o�ܤ��D ��A�A��ˬd /proc/interrupts �H�T�w�S��Ĭ�o�͡D

8.2 �]�w��C�]�ƪ��}

��U�ӡA�A��]��}�D�d�ݧA�D��O��U��]�w�D�N��_�A�C�Ӧ�}�u�঳�@�Ӧ�C�]�ơD �A��q�`�|�t�m��U��o�ˡG


        ttyS0 address 0x3f8
        ttyS1 address 0x2f8
        ttyS2 address 0x3e8
        ttyS3 address 0x2e8

��ܧA�Q�n��C�@�Ӧ�C�]�ƨϥΪ��}�åB�̦��ӳ]�w��D �ڱN�ڪ��ƾھ��]�b ttyS3 �A�ڪ��ƹ��b ttyS0�A�ӧڪ��׺ݾ��b ttyS2�D

��A��s�ҰʮɡA Linux ��ӷ|�b�A�ҳ]�w��}�ݨ�A��C��D Linux �Ҭݨ쪺 IRQ �i�ण�|��A��]�w��۲šD ��߳o�@�I�D Linux �b��Ұʪ��ɭԨèS�� IRQ ��A �]�� IRQ ��O�M�I�åB��i��Q��F��D�ϥ� setserial �ӧi�D Linux ��Ӱ�ϥΨ�� IRQ�D �A�]�i�H�ˬd /proc/ioports �Ӭݬݦb Linux �Ұʫᨺ�ǿ�X��J��}�Q�ϥΡD

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8. �گ�ϥζW�L��Ӫ���C�˸m��?

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8. �گ�ϥζW�L��Ӫ��C�˸m��?

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