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- Changes
-
- November 12th, 1992:
-
- - Previous to this release, the SANA-II structure Sana2DeviceStats was
- defined differently in sana2.h and sana2.i. The assembly include file
- contained an erroneous entry for a field labelled 'SoftMisses'. This
- field had been removed from the 'C' header file, but never from the
- assembly include. To resolve this problem, this field in the assembly
- file has been kept (to preserve structure size), but marked as "Unused".
- A ULONG has been added at the appropriate location in the header file,
- and also marked as "unused". If you were using the header file
- definition for this structure, please take note that the structure size
- has -changed-!
-
- - The SLIP and CSLIP drivers have been included in this archive. These
- drivers are primarily useful only to an IP-based protocol stack, but
- can be used in other applications. See the documentation in driver_docs
- for more information.
-
- May, 1992:
-
- There have been no substantive changes from the Novemeber 7 Draft for Final
- Comment and approval. There have been minor clarifications and typographical
- corrections and a section was added to clarify ARCNET framing.
-
- Since the Fish Disk/'91 DevCon draft of the SANA-II standard, here is a
- summary list of the important changes:
-
- - Packet type specification has been drastically simplified. The original
- standard called for a generalized "Packet Magic" which all drivers and
- protocols had to deal with, even though few people should ever have to worry
- about the problem. We could also have specified that there are 802.3 SANA-II
- drivers and that there are ethernet drivers and that if you want 802.3 and
- ethernet (even if on the same wire) from the same machine, use two ethernet
- boards. This didn't make sense because we don't anticipate multiple protocols
- needing to use 802.3 frames nor much encouragement for hardware manufactures
- to provide special 802.3 drivers. The current solution keeps the standard
- simple and allows highly efficient implementations, but it does make ethernet
- drivers a little more complex and does make using 802.3 frames harder.
-
-
- - The original SANA-II device driver specification therefore called for
- drivers to have no internal buffers and to get all buffers from protocols in
- the form of a data structure called a NetBuff. Hence, all protocols were
- required to use NetBuffs. This was highly unsatisfactory since most
- protocols are implemented from an existing code base which includes its own
- buffer management scheme. NetBuffs are removed from the standard and
- replaced with a function callback.
-
- - The original standard called for an interface to the ability of some hardware
- to simultaneously accept packets for several hardware addresses. Such a
- feature is of dubious usefulness. In order to simplify the standard, station
- aliases are no longer part of the SANA-II Network Device Driver Specification.
- If station aliasing does turn out to be a useful feature available on some
- hardware for the Amiga, the standard can easily be extended to re-introduce
- station aliasing. Remember that all Exec drivers must check for io_Command
- values not supported by the driver. Hence, SANA-II commands can be added
- without requiring that existing drivers be rev'd.
-
- - Since the IOSana2Req structure had to be changed anyway, many names in
- <devices/sana2.h> have been changed to be more consistent with other system
- names. It is believed that global search and replace should make this a mostly
- trivial change and that the benefits gained from consistent naming outweigh
- the inconvenience to those few who have existing SANA-II code.
-
- - Events are now defined as a bit mask rather than as scalars.
-