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Annotation of coherent/f/usr/man/KERNEL/st, revision 1.1

1.1     ! root        1: sstt -- Device Driver
        !             2: 
        !             3: 
        !             4: The /ddeevv/rrsstt*  devices provide access to the  Archive SC-400 streaming tape
        !             5: controller.   Each entry  is assigned  major device number  12, and  may be
        !             6: accessed as a character-special device.
        !             7: 
        !             8: The  sstt tape  driver  handles one  0.25-inch  streaming-tape drive.   Minor
        !             9: device 0  requests allocation  of a 256-kilobyte  tape cache and  should be
        !            10: used unless the system has  minimal memory (e.g., less than 640 kilobytes).
        !            11: Minor devices  1 through 127 request  allocation of a tape  cache of one to
        !            12: 127 kilobytes.   These devices normally  rewind the tape  during the close;
        !            13: adding 128 to a minor-device number specifies non-rewind on close.
        !            14: 
        !            15: For an interface  to be accessible from the COHERENT  system, a device file
        !            16: must be  present in  directory /ddeevv with  the appropriate type,  major, and
        !            17: minor device numbers, and permissions.  The following gives an example form
        !            18: of the command mmkknnoodd to creates a special file for a device:
        !            19: 
        !            20: /etc/mknod /dev/rst256 c 12 0
        !            21: /etc/mknod /dev/nrst256 c 12 128
        !            22: 
        !            23: Tape-oriented commands under COHERENT (e.g., ttaarr) normally the disk devices
        !            24: to store their output.  The following sample commands associate the generic
        !            25: interface with the Archive streaming tape driver:
        !            26: 
        !            27: /bbiinn/llnn -ff /ddeevv/rrsstt225566  /ddeevv/rrmmtt
        !            28: /bbiinn/llnn -ff /ddeevv/nnrrsstt225566 /ddeevv/nnrrmmtt
        !            29: 
        !            30: Depending on the  amount of memory available, you may  wish to restrict the
        !            31: amount of memory used to buffer tape data.  This may be done by linking the
        !            32: appropriate /ddeevv/rrsstt entry  to /ddeevv/rrmmtt.  For example, /ddeevv/rrsstt6644 allocates
        !            33: 64  kilobytes during  tape transfer  whereas  /ddeevv/rrsstt3322 allocates  only 32
        !            34: kilobytes.
        !            35: 
        !            36: _H_a_r_d_w_a_r_e
        !            37: 
        !            38: The following  kernel variables define the  hardware interface to streaming
        !            39: tape.
        !            40: 
        !            41: SSTTIIRRQQ     Specify the interrupt vector (default, 3).
        !            42: 
        !            43: SSTTPPOORRTT    Specify the input/output port (default, 0x200).
        !            44: 
        !            45: SSTTDDMMAA     Specify the DMA channel (default, 1).
        !            46: 
        !            47: Should these parameters conflict with other system hardware, you should use
        !            48: the  command /ccoonnff/ppaattcchh  to  rebuild the  kernel  appropriately.  See  the
        !            49: Lexicon article on hhss for sample commands.
        !            50: 
        !            51: _F_i_l_e_s
        !            52: /ddeevv/rrsstt* -- Auto-rewind character-special file
        !            53: /ddeevv/nnrrsstt* -- Non-rewinding character-special file
        !            54: <ssyyss/mmttiiooccttll.hh>-- Tape iiooccttll commands
        !            55: 
        !            56: _S_e_e _A_l_s_o
        !            57: ddeevviiccee ddrriivveerrss, ttaarr
        !            58: 
        !            59: _N_o_t_e_s
        !            60: As delivered, the Archive tape controller uses interrupt vector 3.  If this
        !            61: interrupt  is to  be  used, then  the  COHERENT kernel  must be  configured
        !            62: without the second serial line driver (e.g., /ddeevv/ccoomm22*).

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