c38c22251d
ADMtek AL981 "Comet" chipset. The AL981 is yet another DEC tulip clone, except with simpler receive filter options. The AL981 has a built-in transceiver, power management support, wake on LAN and flow control. This chip performs extremely well; it's on par with the ASIX chipset in terms of speed, which is pretty good (it can do 11.5MB/sec with TCP easily). I would have committed this driver sooner, except I ran into one problem with the AL981 that required a workaround. When the chip is transmitting at full speed, it will sometimes wedge if you queue a series of packets that wrap from the end of the transmit descriptor list back to the beginning. I can't explain why this happens, and none of the other tulip clones behave this way. The workaround this is to just watch for the end of the transmit ring and make sure that al_start() breaks out of its packet queuing loop and waiting until the current batch of transmissions completes before wrapping back to the start of the ring. Fortunately, this does not significantly impact transmit performance. This is one of those things that takes weeks of analysis just to come up with two or three lines of code changes. |
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alpha | ||
i386 | ||
ABOUT.TXT | ||
ERRATA.TXT | ||
FLOPPIES.TXT | ||
HARDWARE.TXT | ||
LAYOUT.TXT | ||
README.TXT | ||
RELNOTES.TXT | ||
TROUBLE.TXT | ||
UPGRADE.TXT | ||
XFREE86.TXT |
----------------------------------------- FreeBSD 4.0 --- SNAPSHOT Version , , ----------------------------------------- /( )` \ \___ / | This is a binary snapshot of 4.0-current, the /- _ `-/ ' (HEAD) branch which is currently moving towards (/\/ \ \ /\ the follow-on release to 4.0. / / | ` \ O O ) / | `-^--'`< ' (_.) _ ) / `.___/` / `-----' / Feedback or offers to help with anything <----. __ / __ \ you see in this release are most welcome <----|====O)))==) \) /==== and should be sent to one of the approp- <----' `--' `.__,' \ riate mailing lists - please see the | | ABOUT.TXT file for more information. \ / /\ ______( (_ / \______/ ,' ,-----' | `--{__________) TARGET AUDIENCE: ---------------- This release is aimed primarily at early-adopters and the various other folks who want to get involved with the ongoing development of FreeBSD and are willing to deal with a few bumps in the road. We do our best to ensure that each snapshot works as advertised, but tracking -current is a process which frequently has its off days. If you're both technically proficient and know exactly what you're getting into here (e.g. you've been following -current) then this snapshot is probably for you. If you're more interested in doing business with FreeBSD than in playing with the cutting edge of technology, however, then 3.x is almost certainly your best bet. ROAD MAP: Most files here are also in the Documentation Menu of the boot floppy ERRATA.TXT Please read this file! It will tell you where to look for the latest information on problems which have been found and fixed in this release. README.TXT This file ABOUT.TXT All about FreeBSD, including contact information RELNOTES.TXT Release Notes - what's new & different in this release LAYOUT.TXT Information about the layout of the release directory. If you are installing from floppies, it is especially important that you *read this section!* HARDWARE.TXT Information about the configuration of the GENERIC kernel and supported hardware INSTALL.TXT How to make a new installation of FreeBSD on your PC using the data you see here UPGRADE.TXT How to upgrade an existing FreeBSD installation TROUBLE.TXT Troubleshooting information o For new installation instructions, see the INSTALL.TXT and HARDWARE.TXT files. o If you are upgrading from a previous FreeBSD version, please take a look at UPGRADE.TXT. o It is also important to check the ERRATA.TXT file for any late-breaking issues with this release. This file contains the latest information on upgrade, security or other problems which an administrator should be aware of. For the most up-to-date software along the RELENG_3 branch (also known as 3.1-stable) which is now proceeding onwards toward the release of FreeBSD 3.2, please install from: ftp://releng3.freebsd.org/pub/FreeBSD/ Or for the latest 4.0-Current (HEAD branch) snapshot releases, please install from: ftp://current.freebsd.org/pub/FreeBSD If you plan to run either -Stable or -Current you MUST be subscribed to the appropriate mailing list, either freebsd-stable or freebsd-current. For information on subscribing to either list (or both), send an e-mail to majordomo@freebsd.org with the following in the body, not the subject of the letter as appropriate: subscribe freebsd-stable subscribe freebsd-current end We hope you enjoy using FreeBSD as much as we enjoyed creating it!