1. ep100tx.zip Driver
2. SCOT_REL.TXT File Contents

SCOT_REL.TXT Driver File Contents (ep100tx.zip)

			Release Notes for
   SURECOM EtherPerfect 100TX Ethernet Adapter SCO Unix LLI driver

		     SCO201T - Release 02.01


Copying the distribution files
------------------------------

Version 02.01 of the SCO Unix LLI driver for the EP100TX Ethernet
adapter is now available.

The distribution files are:

   SCO201TD.Z (55133)	  - the compressed image of the distribution diskette
   SCOT_INS.TXT 	  - Installation Guide for the EP100TX LLI driver
   SCOT_REL.TXT 	  - release notes for this release (this file)

   1.  Copy the file SCO201TD.Z to SC0201T.dd.Z on a SCO Unix machine.
       The number in parentheses near the file's name (above) is the checksum
       for the file. To verify, use:
	  sum -r SCO201T.dd.Z
       and compare the results.
   3.  Uncompress SCO201T.dd.Z to SCO201T.dd, using:
	  uncompress SCO201T.dd
   4.  Copy the file to a diskette. To create a 3.5" floppy in drive 0, use:
	  dd if=SCO201T.dd of=/dev/rfd0135ds18
       Mark the diskette:
	 EP100TX Ethernet Adapter LLI driver
	 Rel.02.01



Version 02.01
-------------

New features and modifications:

Version 2.01 is a maintenance update to version 2.00. There are
no functionality changes, only fixes to problems.

1. Correct several issues regarding DC21140 Dynamic Autosensing:

   - Don't switch media if no link is found, unless a default media
     is specified in the SROM. If none is specified and no link is found,
     stay in last media. Important for board implementations that have
     false transient link indications, to prevent toggling endlessly.

   - Set <SCR> bit when in 10Mb. If the bit is not set, 100Mb activity
     may not be identified and media won't switch even though it should.

   - Set correct tx threshold values after switching media. In ver. 2.00
     the tx threshold was left at the values of the first media found,
     even if the medium was switched. Important only if the threshold
     is changed (in space.c) from the defaults.

2. Correct usage of internal timer in DC21140 power-up autosensing.
   In ver. 2.00 timeouts may have been too short, not allowing correct
   media detection in some extreme cases.

3. Fix value written to CSR6 in DC21140 (bit 25 is now "must be one").
   If bit is not set to 1, it may affect compliance with the Ethernet spec,
   in some extreme cases. This is now a requirment in the DC21140 spec.

4. Clearify some explanations in space.c, in particular regarding the GPR
   values.

5. Fix custom scripts to work correctly on OpenServer 5.0. The limitation
   of having to run netconfig before custom is now removed. Also,
   the system came up okay when no network cards were installed (removing
   the limitation detected in the beta version).

6. Removed an extra prompt to hit <return> in the custom init script.

7. Fix interrupt mask for DC21140. This change has no functional effect,
   it is a cosmetic change.

Limitations:

Following are the known limitations of version 02.01:

1. The driver supports up to 4 ports.
   Due to PCI BIOS limitations, the user must be very careful when
   configuring multiple PCI boards. The chains are bound in the order
   the BIOS finds the adapters on the PCI bus, therefore must make sure
   that the chains are set correctly. This is particularly true for boards
   with PCI-PCI bridges, where the adapters are on a PCI bus with a bus
   number higher than zero and therefore are found by the PCI BIOS after
   all the devices on buses with lower numbers.

   For example:

   In a system with two EP100TX PCI boards installed (A and B)
   two chains are created:

      sco_tcp->dce0
      sco_tcp->dce1

   Assuming the PCI BIOS finds board A before board B, dce0 will be bound to
   board A and dce1 to board B.

   Removing board A, or adding another board C (that will be found by the BIOS
   before A or B) will cause a shift in the bindings.

2. The driver support only boards that their SROM was programmed in the
   format of version 1.0 and the boards that their SROM was programmed in
   the classic version (32 bytes of Ethernet address and checksum).