UPDATE NEWS: version 1.33 - 26 Aug 98   Interrupt management in this driver has become, over   time, increasingly odd and difficult to explain - this   has been mostly due to my own mental inadequacies. In   recent kernels, it has failed to function at all when   compiled for SMP. I've fixed that problem, and after   taking a fresh look at interrupts in general, greatly   reduced the number of places where they're fiddled   with. Done some heavy testing and it looks very good.   The driver now makes use of the __initfunc() and   __initdata macros to save about 4k of kernel memory.   Once again, the same code works for both 2.0.xx and   2.1.xx kernels.UPDATE NEWS: version 1.32 - 28 Mar 98   Removed the check for legal IN2000 hardware versions:   It appears that the driver works fine with serial   EPROMs (the 8-pin chip that defines hardware rev) as   old as 2.1, so we'll assume that all cards are OK.UPDATE NEWS: version 1.31 - 6 Jul 97   Fixed a bug that caused incorrect SCSI status bytes to be   returned from commands sent to LUN's greater than 0. This   means that CDROM changers work now! Fixed a bug in the   handling of command-line arguments when loaded as a module.   Also put all the header data in in2000.h where it belongs.   There are no longer any differences between this driver in   the 2.1.xx source tree and the 2.0.xx tree, as of 2.0.31   and 2.1.45 (or is it .46?) - this makes things much easier   for me...UPDATE NEWS: version 1.30 - 14 Oct 96   Fixed a bug in the code that sets the transfer direction   bit (DESTID_DPD in the WD_DESTINATION_ID register). There   are quite a few SCSI commands that do a write-to-device;   now we deal with all of them correctly. Thanks to Joerg   Dorchain for catching this one.UPDATE NEWS: version 1.29 - 24 Sep 96   The memory-mapped hardware on the card is now accessed via   the 'readb()' and 'readl()' macros - required by the new   memory management scheme in the 2.1.x kernel series.   As suggested by Andries Brouwer, 'bios_param()' no longer   forces an artificial 1023 track limit on drives. Also   removed some kludge-code left over from struggles with   older (buggy) compilers.UPDATE NEWS: version 1.28 - 07 May 96   Tightened up the "interrupts enabled/disabled" discipline   in 'in2000_queuecommand()' and maybe 1 or 2 other places.   I _think_ it may have been a little too lax, causing an   occasional crash during full moon. A fully functional   /proc interface is now in place - if you want to play   with it, start by doing 'cat /proc/scsi/in2000/0'. You   can also use it to change a few run-time parameters on   the fly, but it's mostly for debugging. The curious   should take a good look at 'in2000_proc_info()' in the   in2000.c file to get an understanding of what it's all   about; I figure that people who are really into it will   want to add features suited to their own needs...   Also, sync is now DISABLED by default.UPDATE NEWS: version 1.27 - 10 Apr 96   Fixed a well-hidden bug in the adaptive-disconnect code   that would show up every now and then during extreme   heavy loads involving 2 or more simultaneously active   devices. Thanks to Joe Mack for keeping my nose to the   grindstone on this one.UPDATE NEWS: version 1.26 - 07 Mar 96   1.25 had a nasty bug that bit people with swap partitions   and tape drives. Also, in my attempt to guess my way   through Intel assembly language, I made an error in the   inline code for IO writes. Made a few other changes and   repairs - this version (fingers crossed) should work well.UPDATE NEWS: version 1.25 - 05 Mar 96   Kernel 1.3.70 interrupt mods added; old kernels still OK.   Big help from Bill Earnest and David Willmore on speed   testing and optimizing: I think there's a real improvement   in this area.   New! User-friendly command-line interface for LILO and   module loading - the old method is gone, so you'll need   to read the comments for 'setup_strings' near the top   of in2000.c. For people with CDROM's or other devices   that have a tough time with sync negotiation, you can   now selectively disable sync on individual devices -   search for the 'nosync' keyword in the command-line   comments. Some of you disable the BIOS on the card, which   caused the auto-detect function to fail; there is now a   command-line option to force detection of a ROM-less card.UPDATE NEWS: version 1.24a - 24 Feb 96   There was a bug in the synchronous transfer code. Only   a few people downloaded before I caught it - could have   been worse.UPDATE NEWS: version 1.24 - 23 Feb 96   Lots of good changes. Advice from Bill Earnest resulted   in much better detection of cards, more efficient usage   of the fifo, and (hopefully) faster data transfers. The   jury is still out on speed - I hope it's improved some.   One nifty new feature is a cool way of doing disconnect/   reselect. The driver defaults to what I'm calling   'adaptive disconnect' - meaning that each command is   evaluated individually as to whether or not it should be   run with the option to disconnect/reselect (if the device   chooses), or as a "SCSI-bus-hog". When several devices   are operating simultaneously, disconnects are usually an   advantage. In a single device system, or if only 1 device   is being accessed, transfers usually go faster if disconnects   are not allowed.The default arguments (you get these when you don't give an 'in2000'command-line argument, or you give a blank argument) will causethe driver to do adaptive disconnect, synchronous transfers, and aminimum of debug messages. If you want to fool with the options,search for 'setup_strings' near the top of the in2000.c file andcheck the 'hostdata->args' section in in2000.h - but be warned! Noteverything is working yet (some things will never work, probably).I believe that disabling disconnects (DIS_NEVER) will allow youto choose a LEVEL2 value higher than 'L2_BASIC', but I haven'tspent a lot of time testing this. You might try 'ENABLE_CLUSTERING'to see what happens: my tests showed little difference either way.There's also a define called 'DEFAULT_SX_PER'; this sets the datatransfer speed for the asynchronous mode. I've put it at 500 nsdespite the fact that the card could handle settings of 376 or252, because higher speeds may be a problem with poor qualitycables or improper termination; 500 ns is a compromise. You canchoose your own default through the command-line with the'period' keyword.------------------------------------------------***********  DIP switch settings  **************------------------------------------------------   sw1-1 sw1-2    BIOS address (hex)   -----------------------------------------    off   off     C8000 - CBFF0    on    off     D8000 - DBFF0    off   on      D0000 - D3FF0    on    on      BIOS disabled   sw1-3 sw1-4    IO port address (hex)   ------------------------------------    off   off     220 - 22F    on    off     200 - 20F    off   on      110 - 11F    on    on      100 - 10F   sw1-5 sw1-6 sw1-7    Interrupt   ------------------------------    off   off   off     15    off   on    off     14    off   off   on      11    off   on    on      10    on    -     -       disabled   sw1-8 function depends on BIOS version. In earlier versions this   controlled synchronous data transfer support for MSDOS:      off = disabled      on  = enabled   In later ROMs (starting with 01.3 in April 1994) sw1-8 controls   the "greater than 2 disk drive" feature that first appeared in   MSDOS 5.0 (ignored by Linux):      off = 2 drives maximum      on  = 7 drives maximum   sw1-9    Floppy controller   --------------------------    off     disabled    on      enabled------------------------------------------------   I should mention that Drew Eckhardt's 'Generic NCR5380' sources   were my main inspiration, with lots of reference to the IN2000   driver currently distributed in the kernel source. I also owe   much to a driver written by Hamish Macdonald for Linux-m68k(!).   And to Eric Wright for being an ALPHA guinea pig. And to Bill   Earnest for 2 tons of great input and information. And to David   Willmore for extensive 'bonnie' testing. And to Joe Mack for   continual testing and feedback.            John Shifflett    jshiffle@netcom.com