Justin T. Gibbs c5e0851d47 Major overhaul of the aic7xxx driver:
- catch the interrupt type (EDGE/LEVEL) before chip reset instead
	  of guessing the right type.

	- Add pause variable to the ahc struct to better handle the different
	  interrupt types and pausing the sequencer.

	- CLRINTSTAT -> CLRSCSIINT: This is a documented bit in the CLRINT
	  register in newer Adaptec documentation, so use their name for it.

	- Report valid residual byte counts.

	- Don't mess with the target scratch areas > id 8 on single, narrow,
	  channel devices.  The BIOS does a checksum of this area and can
	  flip out if we zero it out.

	- Initialize the sequencer FLAGS scratch ram variable in the single
	  channel devices to 0.  This was the cause of the annoying warning
	  where we would get a cmdcmplt the first time we did any type of
	  transfer negotiation with no valid scb.  It also fixes the problem
	  that looked like the INTSTAT register wasn't clearing fast enough.
	  This only showed up on 294x cards, not motherboard aic7870s.

	- Add the AHC_AIC7870 type and use it as the superset of aic7870
	  based controllers.

	- clear the sync offset section of the targ scratch area so that
	  we default to asyncronous transfers.  This was only a problem
	  for wide controllers because there was a scenario where the
	  offset wouldn't get updated before a data(out/in) phase would
	  occur.  This required some change in the sequencer code since we
	  were depending on this field to hold the rate to negotiate.

	- allow sync and wide negotiated commands to be tagged (the sequencer
	  now handles this properly).
1995-03-31 13:54:41 +00:00
1995-02-17 03:57:00 +00:00
1995-03-30 15:10:20 +00:00
1995-03-23 19:09:24 +00:00
1995-03-30 00:22:29 +00:00
1995-03-31 13:54:41 +00:00
1995-03-31 11:48:35 +00:00
1995-03-17 19:28:59 +00:00

   -----------------------------------------
       FreeBSD 2.0  ---  ALPHA Release                 ,        ,
   -----------------------------------------          /(        )`
                                                      \ \___   / |
Welcome to the ALPHA release of FreeBSD 2.0 - the     /- _  `-/  '
first public snapshot of our new 4.4BSD Lite based   (/\/ \ \   /\
operating system environment.  This install proce-   / /   | `    \
dure is also at the ALPHA stage, and contains only   O O   ) /    |
the minimum functionality required by an             `-^--'`<     '
*EXPERIENCED* person to install the system.         (_.)  _  )   /
It is our hope, of course, that the feedback         `.___/`    /
provided from this snapshot will                       `-----' /
greatly assist us in making the release   <----.     __ / __   \
of 2.0 much more user friendly.  Your     <----|====O)))==) \) /====
comments and criticisms are very          <----'    `--' `.__,' \
valuable to us, so please don't hesitate               |        |
in contacting us!  Full details on where and            \       /	/\
how to provide feedback are given below.           ______( (_  / \______/
                                                 ,'  ,-----'   |
This install procedure is ALPHA code, and        `--{__________)
may very possibly *DESTROY* the contents of your
ENTIRE DISK!  Please do not proceed with this installation
unless you've adequately backed up your data first!

If any errors occur during this installation, you can see them
by toggling over to the alternate screen - type ALT-F2 to switch
over, ALT-F1 to switch back to the install screen.  The debugging
output on the second screen may be very valuable to us in understanding
your bug report, so please be sure to take note of it when reporting
any failures in the installation!  Thanks!

Menus and scrolling output windows may be traversed with the arrow
and Page Up/Page Down keys.  To suspend the installation at any point,
hit ESC twice.  Hitting TAB will move the focus to different controls.
If you've ever dealt with a DOS installation, you'll know how to deal
with this.

For a more complete description of what's new in this release, please
see the release notes.

For more documentation on this system, it is recommended that you purchase
the 4.4BSD Document Set from O'Reilly Associates and the USENIX Association.
ISBN 1-56592-082-1  We have no connection with O'Reilly, we're just
satisfied customers!

Have fun, and please let us know of any problems you encounter with
this release!

Comments should be sent to:

	hackers@FreeBSD.org

Bug reports should be sent using the `send-pr' utility, if you
were able to get the system installed, otherwise to:

	bugs@FreeBSD.org

And general questions to:

	questions@FreeBSD.org


Please have patience if your questions are not answered right away -
this is an especially busy time for us, and our volunteer resources
are often strained to the limit (if not somewhat past!).

Thanks!

				The FreeBSD Project
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