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EQNX(4)			    BSD Programmer's Manual		       EQNX(4)

NAME
     eqnx - driver for Equinox SuperSerial Technology host controllers

SYNOPSIS
     eqnx0 at isa? port 0x220 mem 0xd000
     eqnx0 at eisa?
     eqnx0 at pci?

DESCRIPTION
     This driver supports all Equinox SuperSerial Technology boards.

     Equinox SuperSerial and multiport adapter cards, unlike other adapter
     cards, do not contain UARTs driven by a programmable microprocessor. In-
     stead, they contain a custom ASIC processor, termed SuperSerial Processor
     (SSP), for controlling up to 64 ports (version 1), or up to 4 ports (ver-
     sion 2).  Every Equinox SuperSerial Technology (SST) adapter card con-
     tains at least one SSP.  SST adapter cards containing two SSPs control up
     to 128 ports (version 1), or up to 8 ports (version 2). The SSP receives
     and transmits data, and manages flow control without processor involve-
     ment. This lowers the load on the system processor, leaving more time for
     other user activity. The driver communicates with the SST adapter card
     through a memory buffer and a set of registers.  This permits the SSP to
     manage RS-232 lines with very little host processor involvement and to
     ensure maximum throughput at speeds up to 921,600 bps.

     Install Equinox SST adapter cards prior to installing the device driver.
     Refer to the appropriate Equinox SuperSerial Technology Hardware Instal-
     lation & Reference Manual (either Expandable I/O Subsystem or Multiport
     Board Series) for information concerning hardware installation.

CONFIGURATION
     The SST based ISA boards require a DIP Switch setting on the board. Enter
     this value in the Equinox driver's entry in the config file.

		       DIP Switch Settings
		       I/O (Base) Port Address:

		       S1, Switch
				    4	3   2	1
		       Address	   --- --- --- ---
			200	   OFF OFF OFF OFF
			220	   OFF OFF OFF ON
			240	   OFF OFF ON  OFF
			260	   OFF OFF ON  ON
			280	   OFF ON  OFF OFF
			2A0	   OFF ON  OFF ON
			2C0	   OFF ON  ON  OFF
			2E0	   OFF ON  ON  ON
			300	   ON  OFF OFF OFF
			320	   ON  OFF OFF ON
			340	   ON  OFF ON  OFF
			360	   ON  OFF ON  ON
			380	   ON  ON  OFF OFF
			3A0	   ON  ON  OFF ON
			3C0	   ON  ON  ON  OFF
			3E0	   ON  ON  ON  ON

     The SST EISA boards require that the EISA configuration utility be run
     before loading the driver. This defines the Equinox board type and memory
     address.  The memory address must be between 640K - 1 Meg. Copy the
     Equinox ".cfg" files to the utility disk which contains the EISA configu-
     ration software. Failure to perform the EISA configuration, or incorrect
     EISA configuration will cause the driver will display an error message
     for the board which was not configured.  The board can not be used and
     will be skipped if an attempt is made to load it.	Since all the configu-
     ration for the EISA boards is in CMOS, the user should not supply any
     port or memory parameters in the config file. Doing so implies an ISA
     type board. Equinox SuperSerial EISA and PCI boards are loaded in slot
     order, the lowest slot first. All PCI boards are loaded, then all EISA
     boards loaded. ISA boards are loaded in the order specified in the config
     file.

CONFIG
     The following are examples of common config lines:

	   eqnx0 at isa? port 0x220 iomem 0xd0000	# SST - 4/8/64/128 I
	   eqnx0 at eisa?				# SST - 4/8/64/128 E
	   eqnx0 at pci?				# SST - 4/8/64/128 P

     The EISA configuration defines the EISA board(s) iomem. PCI BIOS defines
     the PCI boards' iomem without user involvement. The configuration iomem
     value defines the address for ISA based boards. The Equinox driver's hole
     finder will map the board if the iomem value is 0x00000.

FILES
     /dev/tty[1-f][a-h][0-f]	  device files through which the board is ac-
				  cessed.

SEE ALSO
     tty(4),  ssmkn(8),	 sstty(8).

AUTHORS
     Equinox Systems, Inc.

BSDI BSD/OS			 July 11, 2001				     2
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