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Based on kernel version 3.13. Page generated on 2014-01-20 22:04 EST.

1	Sat May 12 12:00 2001 Gerard Roudier (groudier@club-internet.fr)
2		* version ncr53c8xx-3.4.3b
3		- Ensure LEDC bit in GPCNTL is cleared when reading the NVRAM.
4		  Fix sent by Stig Telfer <stig@api-networks.com>.
5		- Define scsi_set_pci_device() as nil for kernel < 2.4.4.
6	
7	Mon Feb 12 22:30 2001 Gerard Roudier (groudier@club-internet.fr)
8		* version ncr53c8xx-3.4.3
9		- Call pci_enable_device() as AC wants this to be done.
10		- Get both the BAR cookies actual and PCI BAR values.
11		  (see Changelog.sym53c8xx rev. 1.7.3 for details)
12		- Merge changes for linux-2.4 that declare the host template 
13		  in the driver object also when the driver is statically 
14		  linked with the kernel.
15	
16	Sun Sep 24 21:30 2000 Gerard Roudier (groudier@club-internet.fr)
17		* version ncr53c8xx-3.4.2
18		- See Changelog.sym53c8xx, driver version 1.7.2.
19	
20	Wed Jul 26 23:30 2000 Gerard Roudier (groudier@club-internet.fr)
21		* version ncr53c8xx-3.4.1
22		- Provide OpenFirmware path through the proc FS on PPC.
23		- Remove trailing argument #2 from a couple of #undefs.
24	
25	Sun Jul 09 16:30 2000 Gerard Roudier (groudier@club-internet.fr)
26		* version ncr53c8xx-3.4.0
27		- Remove the PROFILE C and SCRIPTS code.
28		  This facility was not this useful and thus was not longer 
29		  desirable given the increasing complexity of the driver code.
30		- Merges from FreeBSD sym-1.6.2 driver:
31		  * Clarify memory barriers needed by the driver for architectures 
32		    that implement a weak memory ordering.
33		- General cleanup:
34		  Move definitions for barriers and IO/MMIO operations to the 
35		  sym53c8xx_defs.h header files. They are now shared by the 
36		  both drivers.
37		  Use SCSI_NCR_IOMAPPED instead of NCR_IOMAPPED.
38	
39	Thu May 11   12:30 2000 Pam Delaney (pam.delaney@lsil.com)
40		* revision 3.3b
41	 
42	Mon Apr 24 12:00 2000 Gerard Roudier (groudier@club-internet.fr)
43		* revision 3.2i
44		- Return value 1 (instead of 0) from the driver setup routine.
45		- Let the driver also attach controllers that have been set to 
46		  OFF in the NVRAM as it did prior to revision 3.2g.
47	
48	Sat Apr 1  12:00 2000 Gerard Roudier (groudier@club-internet.fr)
49		* revision 3.2h
50		- Fix a compilation problem on Alpha introduced in version 3.2g.
51	          (`port' changed to `base_io').
52		- Move from `sym' to this driver a tiny change for __sparc__ that 
53		  applies to cache line size (? Probably from David S Miller).
54		- Make sure no data transfer will happen for Scsi_Cmnd requests 
55		  that supply SCSI_DATA_NONE direction (this avoids some BUG() 
56		  statement in the PCI code when a data buffer is also supplied).
57	
58	Thu Mar 16   9:30 2000 Pam Delaney (pam.delaney@lsil.com)
59		* revision 3.3b-3
60	 	- Added exclusion for the 53C1010 and 53C1010_66 chips
61		  to the driver (change to sym53c8xx_comm.h).
62	
63	Mon March 6  23:15 2000 Gerard Roudier (groudier@club-internet.fr)
64		* revision 3.2g
65		- Add the file sym53c8xx_comm.h that collects code that should 
66		  be shared by sym53c8xx and ncr53c8xx drivers. For now, it is  
67		  a header file that is only included by the ncr53c8xx driver, 
68		  but things will be cleaned up later. This code addresses 
69		  notably:
70		  * Chip detection and PCI related initialisations
71		  * NVRAM detection and reading
72		  * DMA mapping
73		  * Boot setup command
74		  * And some other ...
75		- Add support for the new dynamic dma mapping kernel interface.
76		  Requires Linux-2.3.47 (tested with pre-2.3.47-6).
77		- Get data transfer direction from the scsi command structure 
78		  (Scsi_Cmnd) when this information is available.
79	
80	Mon March 6  23:15 2000 Gerard Roudier (groudier@club-internet.fr)
81	        * revision 3.2g
82	        - Add the file sym53c8xx_comm.h that collects code that should
83	          be shared by sym53c8xx and ncr53c8xx drivers. For now, it is
84	          a header file that is only included by the ncr53c8xx driver,
85	          but things will be cleaned up later. This code addresses
86	          notably:
87	          * Chip detection and PCI related initialisations
88	          * NVRAM detection and reading
89	          * DMA mapping
90	          * Boot setup command
91	          * And some other ...
92	        - Add support for the new dynamic dma mapping kernel interface.
93	          Requires Linux-2.3.47 (tested with pre-2.3.47-6).
94	        - Get data transfer direction from the scsi command structure
95	          (Scsi_Cmnd) when this information is available.
96	
97	Fri Jan 14 14:00 2000 Pam Delaney (pam.delaney@lsil.com)
98		* revision pre-3.3b-1
99		- Merge parallel driver series 3.31 and 3.2e 
100	
101	Tue Jan 11 14:00 2000 Pam Delaney (pam.delaney@lsil.com)
102		* revision 3.31
103		- Added support for mounting disks on wide-narrow-wide
104		  scsi configurations.  
105		- Built off of version 3.30
106	
107	Mon Jan 10 13:30 2000 Pam Delaney (pam.delaney@lsil.com)
108		* revision 3.30
109		- Added capability to use the integrity checking code
110		  in the kernel (optional).
111		- Disabled support for the 53C1010.
112		- Built off of version 3.2c
113	
114	Sat Jan 8  22:00 2000 Gerard Roudier (groudier@club-internet.fr)
115		* revision 3.2e
116		- Add year 2000 copyright.
117		- Display correctly bus signals when bus is detected wrong.
118		- Remove the dead code that broke driver 3.2d.
119	
120	Mon Dec 6  22:00 1999 Gerard Roudier (groudier@club-internet.fr)
121		* revision 3.2d
122		- Change messages written by the driver at initialisation and 
123		  through the /proc FS (rather cosmetic changes that consist in
124		  printing out the PCI bus number and device/function).
125		- Get rid of the old PCI bios interface, but preserve kernel 2.0 
126		  compatibility from a simple wrapper.
127		- Remove the compilation condition about having to acquire the 
128		  io_request_lock since it seems to be a definite feature now.:)
129		- proc_dir structure no longer needed for kernel >= 2.3.27.
130		- Change the driver detection code by the sym53c8xx one, modulo 
131		  some minor changes. The driver can now attach any number of 
132		  controllers (>40) and does no longer hoger stack space at 
133		  initialisation.
134		- Definitely disable overlapped PCI arbitration for all dual 
135		  function chips, since I cannot make sure for what chip revisions 
136		  it is actually safe.
137		- Add support for the SYM53C1510D.
138		- Update the poor Tekram sync factor table.
139		- Remove the compilation condition about having to acquire the 
140		  io_request_lock since it seems to be a definite feature now.:)
141		- proc_dir structure no longer needed for kernel >= 2.3.27.
142	
143	Sat Sep 11  18:00 1999 Gerard Roudier (groudier@club-internet.fr)
144		* revision 3.2c
145		- Handle correctly (hopefully) jiffies wrap-around.
146		- Restore the entry used to detect 875 until revision 0xff.
147		  (I removed it inadvertently, it seems :) )
148		- Replace __initfunc() which is deprecated stuff by __init which 
149		  is not yet so. ;-)
150		- Add support of some 'resource handling' for linux-2.3.13.
151		  Basically the BARs have been changed to something more complex 
152		  in the pci_dev structure.
153		- Remove some deprecated code.
154	
155	Sat May 10  11:00 1999 Gerard Roudier (groudier@club-internet.fr)
156		* revision pre-3.2b-1
157		- Support for the 53C895A by Pamela Delaney <pam.delaney@lsil.com>
158		  The 53C895A contains all of the features of the 896 but has only 
159		  one channel and has a 32 bit PCI bus. It does 64 bit PCI addressing 
160		  using dual cycle PCI data transfers.
161		- Miscellaneous minor fixes.
162		- Some additions to the README.ncr53c8xx file.
163	
164	Sun Apr 11  10:00 1999 Gerard Roudier (groudier@club-internet.fr)
165		* revision 3.2a
166		- Add 'hostid:#id' boot option. This option allows to change the 
167		  default SCSI id the driver uses for controllers.
168		- Remove nvram layouts and driver set-up structures from the C source,
169		  and use the one defined in sym53c8xx_defs.h file.
170		  (shared by both drivers).
171		- Set for now MAX LUNS to 16 (instead of 8).
172	
173	Thu Mar 11  23:00 1999 Gerard Roudier (groudier@club-internet.fr)
174		* revision 3.2	  (8xx-896 driver bundle)
175		- Only define the host template in ncr53c8xx.h and include the 
176		  sym53c8xx_defs.h file.
177		- Declare static all symbols that do not need to be visible from 
178		  outside the driver code.
179		- Add 'excl' boot command option that allows to pass to the driver 
180		  io address of devices not to attach.
181		- Add info() function called from the host template to print 
182		  driver/host information.
183		- Minor documentation additions.
184	
185	Sat Mar 6  11:00 1999 Gerard Roudier (groudier@club-internet.fr)
186		* revision 3.1h
187		- Fix some oooold bug that hangs the bus if a device rejects a 
188		  negotiation. Btw, the corresponding stuff also needed some cleanup 
189		  and thus the change is a bit larger than it could have been.
190		- Still some typo that made compilation fail for 64 bit (trivial fix).
191	
192	Sun Feb  14:00 1999 Gerard Roudier (groudier@club-internet.fr)
193		* revision 3.1g
194		- Deal correctly with 64 bit PCI address registers on Linux 2.2.
195		  Pointed out by Leonard Zubkoff.
196		- Allow to tune request_irq() flags from the boot command line using 
197		  ncr53c8xx=irqm:??, as follows:
198		  a) If bit 0x10 is set in irqm, IRQF_SHARED flag is not used.
199		  b) If bit 0x20 is set in irqm, IRQF_DISABLED flag is not used.
200		  By default the driver uses both IRQF_SHARED and IRQF_DISABLED.
201		  Option 'ncr53c8xx=irqm:0x20' may be used when an IRQ is shared by 
202		  a 53C8XX adapter and a network board.
203		- Tiny misspelling fixed (ABORT instead of ABRT). Was fortunately 
204		  harmless.
205		- Negotiate SYNC data transfers with CCS devices.
206	
207	Sat Jan 16  17:30 1999 Gerard Roudier (groudier@club-internet.fr)
208		* revision 3.1f
209		- Some PCI fix-ups not needed any more for PPC (from Cort).
210		- Cache line size set to 16 DWORDS for Sparc   (from DSM).
211		- Waiting list look-up didn't work for the first command of the list.
212		- Remove 2 useless lines of code.
213	
214	Sun Dec 13  18:00 1998 Gerard Roudier (groudier@club-internet.fr)
215		* revision 3.1e
216		- Same work-around as for the 53c876 rev <= 0x15 for 53c896 rev 1:
217		  Disable overlapped arbitration. This will not make difference 
218		  since the chip has on-chip RAM.
219	
220	Thu Nov 26  22:00 1998 Gerard Roudier (groudier@club-internet.fr)
221		* revision 3.1d
222		- The SISL RAID change requires now remap_pci_mem() stuff to be 
223		  compiled for __i386__ when normal IOs are used.
224		- Minor spelling fixes in doc files.
225	
226	Sat Nov 21  18:00 1998 Gerard Roudier (groudier@club-internet.fr)
227		* revision 3.1c
228		- Ignore chips that are driven by SISL RAID (DAC 960).
229		  Change sent by Leonard Zubkoff and slightly reworked.
230		- Still a buglet in the tags initial settings that needed to be fixed.
231		  It was not possible to disable TGQ at system startup for devices 
232		  that claim TGQ support. The driver used at least 2 for the queue 
233		  depth but did'nt keep track of user settings for tags depth lower 
234		  than 2.
235	
236	Wed Nov 11  10:00 1998 Gerard Roudier (groudier@club-internet.fr)
237		* revision 3.1b
238		- The driver was unhappy when configured with default_tags > MAX_TAGS
239		  Hopefully doubly-fixed.
240		- Update the Configure.help driver section that speaks of TAGS.
241	
242	Wed Oct 21 21:00 1998 Gerard Roudier (groudier@club-internet.fr)
243		* revision 3.1a
244		- Changes from Eddie Dost for Sparc and Alpha:
245		  ioremap/iounmap support for Sparc.
246		  pcivtophys changed to bus_dvma_to_phys.
247		- Add the 53c876 description to the chip table. This is only useful 
248		  for printing the right name of the controller.
249		- DEL-441 Item 2 work-around for the 53c876 rev <= 5 (0x15).
250		- Add additional checking of INQUIRY data:
251		  Check INQUIRY data received length is at least 7. Byte 7 of 
252		  inquiry data contains device features bits and the driver might 
253		  be confused by garbage. Also check peripheral qualifier.
254		- Cleanup of the SCSI tasks management:
255		  Remove the special case for 32 tags. Now the driver only uses the 
256		  scheme that allows up to 64 tags per LUN.
257		  Merge some code from the 896 driver.
258		  Use a 1,3,5,...MAXTAGS*2+1 tag numbering. Previous driver could  
259		  use any tag number from 1 to 253 and some non conformant devices  
260		  might have problems with large tag numbers.
261		- 'no_sync' changed to 'no_disc' in the README file. This is an old 
262		  and trivial mistake that seems to demonstrate the README file is 
263		  not often read. :)
264	
265	Sun Oct  4 14:00 1998 Gerard Roudier (groudier@club-internet.fr)
266		* revision 3.0i
267		- Cosmetic changes for sparc (but not for the driver) that needs  
268		  __irq_itoa() to be used for printed IRQ value to be understandable.
269		- Some problems with the driver that didn't occur using driver 2.5f 
270		  were due to a SCSI selection problem triggered by a clearly 
271		  documented feature that in fact seems not to work: (53C8XX chips  
272		  are claimed by the manuals to be able to execute SCSI scripts just 
273		  after abitration while the SCSI core is performing SCSI selection).
274		  This optimization is broken and has been removed.
275		- Some broken scsi devices are confused when a negotiation is started 
276		  on a LUN that does not correspond to a real device. According to 
277		  SCSI specs, this is a device firmware bug. This has been worked 
278		  around by only starting negotiation if the LUN has previously be 
279		  used for at least 1 successful SCSI command.
280		- The 'last message sent' printed out on M_REJECT message reception 
281		  was read from the SFBR i/o register after the previous message had 
282		  been sent. 
283		  This was not correct and affects all previous driver versions and 
284		  the original FreeBSD one as well. The SCSI scripts has been fixed 
285		  so that it now provides the right information to the C code.
286	
287	Sat Jul 18 13:00 1998 Gerard Roudier (groudier@club-internet.fr)
288		* revision 3.0g
289		- Preliminary fixes for Big Endian (sent by Eddie C. Dost).
290		  Big Endian architectures should work again with the driver.
291		  Eddie's patch has been partially applied since current 2.1.109 
292		  does not have all the Sparc changes of the vger tree.
293		- Use of BITS_PER_LONG instead of (~0UL == 0xffffffffUL) has fixed
294		  the problem observed when the driver was compiled using EGCS or 
295		  PGCC.
296	
297	Mon Jul 13 20:00 1998 Gerard Roudier (groudier@club-internet.fr)
298		* revision 3.0f
299		- Some spelling fixes.
300		- linux/config.h misplaced in ncr53c8xx.h
301		- MODULE_PARM stuff added for linux 2.1.
302		- check INQUIRY response data format is exactly 2. 
303		- use BITS_PER_LONG if defined. 
304	
305	Sun Jun 28 12:00 1998 Gerard Roudier (groudier@club-internet.fr)
306		* revision 3.0e
307		- Some cleanup, spelling fixes, version checks, documentations 
308		  changes, etc ...
309	
310	Sat Jun 20 20:00 1998 Gerard Roudier (groudier@club-internet.fr)
311		* revision 3.0c
312		- Add a boot setup option that allows to set up device queue depths 
313		  at boot-up. This option is very useful since Linux does not 
314		  allow to change scsi device queue depth once the system has been 
315		  booted up.
316	
317	Sun Jun 15 23:00 1998 Gerard Roudier (groudier@club-internet.fr)
318		* revision 3.0a
319		- Support for up to 64 TAGS per LUN.
320		- Rewrite the TARGET vs LUN capabilities management.
321		  CmdQueue is now handled as a LUN capability as it shall be.
322		  This also fixes a bug triggered when disabling tagged command 
323		  queuing for a device that had this feature enabled.
324		- Remove the ncr_opennings() stuff that was useless under Linux 
325		  and hard to understand to me.
326		- Add "setverbose" procfs driver command. It allows to tune 
327		  verbose level after boot-up. Setting this level to zero, for 
328		  example avoid flooding the syslog file.
329		- Add KERN_XXX to some printk's.
330	
331	Tue Jun 10 23:00 1998 Gerard Roudier (groudier@club-internet.fr)
332		* revision 3.0
333		- Linux config changes for 2.0.34:
334		  Remove NVRAM detection config option. This option is now enabled 
335		  by default but can be disabled by editing the driver header file.
336		  Add a PROFILE config option.
337		- Update Configure.help
338		- Add calls to new function mdelay() for milli-seconds delay if 
339		  kernel version >= 2.1.105.
340		- Replace all printf(s) by printk(s). After all, the ncr53c8xx is 
341		  a driver for Linux.
342		- Perform auto-sense on COMMAND TERMINATED. Not sure it is useful.
343		- Some other minor changes.
344	
345	Tue Jun 4 23:00 1998 Gerard Roudier (groudier@club-internet.fr)
346		* revision 2.6n
347		- Code cleanup and simplification:
348		  Remove kernel 1.2.X and 1.3.X support.
349		  Remove the _old_ target capabilities table.
350		  Remove the error recovery code that have'nt been really useful.
351		  Use a single alignment boundary (CACHE_LINE_SIZE) for data 
352		  structures.
353		- Several aggressive SCRIPTS optimizations and changes:
354		  Reselect SCRIPTS code rewritten.
355		  Support for selection/reselection without ATN.
356		  And some others.
357		- Miscallaneous changes in the C code:
358		  Count actual number of CCB queued to the controller (future use).
359		  Lots of other minor changes.
360	
361	Wed May 13 20:00 1998 Gerard Roudier (groudier@club-internet.fr)
362		* revision 2.6m
363		- Problem of missed SCSI bus reset with the 53C895 fixed by 
364		  Richard Waltham. The 53C895 needs about 650 us for the bus 
365		  mode to settle. Delays used while resetting the controller 
366		  and the bus have been adjusted. Thanks Richard!
367		- Some simplification for 64 bit arch done ccb address testing.
368		- Add a check of the MSG_OUT phase after Selection with ATN.
369		- The new tagged queue stuff seems ok, so some informationnal 
370		  message have been conditionned by verbose >= 3.
371		- Donnot reset if a SBMC interrupt reports the same bus mode.
372		- Print out the whole driver set-up. Some options were missing and 
373		  the print statement was misplaced for modules.
374		- Ignore a SCSI parity interrupt if the chip is not connected to 
375		  the SCSI bus.
376	
377	Sat May 1 16:00 1998 Gerard Roudier (groudier@club-internet.fr)
378		* revision 2.6l
379		- Add CCB done queue support for Alpha and perhaps some other 
380		  architectures.
381		- Add some barriers to enforce memory ordering for x86 and 
382		  Alpha architectures.
383		- Fix something that looks like an old bug in the nego SIR 
384		  interrupt code in case of negotiation failure.
385	
386	Sat Apr 25 21:00 1998 Gerard Roudier (groudier@club-internet.fr)
387		* revision 2.6k
388		- Remove all accesses to the on-chip RAM from the C code:
389		  Use SCRIPTS to load the on-chip RAM.
390		  Use SCRIPTS to repair the start queue on selection timeout.
391		  Use the copy of script in main memory to calculate the chip 
392		  context on phase mismatch.
393		- The above allows now to use the on-chip RAM without requiring 
394		  to get access to the on-chip RAM from the C code. This makes 
395		  on-chip RAM useable for linux-1.2.13 and for Linux-Alpha for 
396		  instance.
397		- Some simplifications and cleanups in the SCRIPTS and C code.
398		- Buglet fixed in parity error recovery SCRIPTS (never tested).
399		- Minor updates in README.ncr53c8xx.
400	
401	Wed Apr 15 21:00 1998 Gerard Roudier (groudier@club-internet.fr)
402		* revision 2.6j
403		- Incorporate changes from linux-2.1.95 ncr53c8xx driver version.
404		- Add SMP support for linux-2.1.95 and above.
405		- Fix a bug when QUEUE FULL is returned and no commands are 
406		  disconnected. This happens with Atlas I / L912 and may happen 
407		  with Atlas II / LXY4.
408		- Nail another one on CHECK condition when requeuing the command 
409		  for auto-sense.
410		- Call scsi_done() for all completed commands after interrupt 
411		  handling.
412		- Increase the done queue to 24 entries.
413	
414	Sat Apr 4 20:00 1998 Gerard Roudier (groudier@club-internet.fr)
415		* revision 2.6i
416		- CTEST0 is used by the 53C885 for Power Management and 
417		  priority setting between the 2 functions.
418		  Use SDID instead as actual target number. Just have had to 
419		  overwrite it with SSID on reselection.
420		- Split DATA_IN and DATA_OUT scripts into 2 sub-scripts.
421		  64 segments are moved from on-chip RAM scripts.
422		  If more segments, a script in main memory is used for the 
423		  additional segments.
424		- Since the SCRIPTS processor continues SCRIPTS execution after 
425		  having won arbitration, do some stuff prior to testing any SCSI 
426		  phase on reselection. This should have the vertue to process 
427		  scripts in parallel with the SCSI core performing selection.
428		- Increase the done queue to 12 entries.
429	
430	Sun Mar 29 12:00 1998 Gerard Roudier (groudier@club-internet.fr)
431		* revision 2.6h
432		- Some fixes.
433	
434	Tue Mar 26 23:00 1998 Gerard Roudier (groudier@club-internet.fr)
435		* revision 2.6g
436		- New done queue. 8 entries by default (6 always useable).
437		  Can be increased if needed.
438		- Resources management using doubly linked queues.
439		- New auto-sense and QUEUE FULL handling that does not need to 
440		  stall the NCR queue any more.
441		- New CCB starvation avoiding algorithm.
442		- Prepare CCBs for SCSI commands that cannot be queued, instead of 
443		  inserting these commands into the waiting list. The waiting list 
444		  is now only used while resetting and when memory for CCBs is not 
445		  yet available?
446	
447	Sun Feb 8 22:00 1998 Gerard Roudier (groudier@club-internet.fr)
448		* revision 2.6f
449		- Some fixes in order to really support the 53C895, at least with 
450		  FAST-20 devices.
451		- Heavy changes in the target/lun resources management to allow 
452		  the scripts to jump directly to the CCB on reselection instead 
453		  of walking on the lun CCBs list. Up to 32 tags per lun are now 
454		  supported without script processor and PCI traffic overhead.
455	
456	Sun Jan 11 22:00 1998 Gerard Roudier (groudier@club-internet.fr)
457		* revision 2.6d
458		- new (different ?) implementation of the start queue:
459	          Use a simple CALL to a launch script in the CCB.
460		- implement a minimal done queue (1 entry :-) ).
461	          this avoid scanning all CCBs on INT FLY (Only scan all CCBs, on 
462	          overflow). Hit ratio is better than 99.9 % on my system, so no 
463	          need to have a larger done queue.
464		- generalization of the restart of CCB on special condition as 
465	          Abort, QUEUE FULL, CHECK CONDITION.
466	          This has been called 'silly scheduler'.
467		- make all the profiling code conditionned by a config option.
468		  This spare some PCI traffic and C code when this feature is not 
469	          needed.
470		- handle more cleanly the situation where direction is unknown.
471		  The pointers patching is now performed by the SCRIPTS processor.
472		- remove some useless scripts instructions.
473	
474		Ported from driver 2.5 series:
475	        ------------------------------
476		- Use FAST-5 instead of SLOW for slow scsi devices according to 
477		  new SPI-2 draft.
478		- Make some changes in order to accommodate with 875 rev <= 3 
479		  device errata listing 397. Minor consequences are:
480		  . Leave use of PCI Write and Invalidate under user control.
481		    Now, by default the driver does not enable PCI MWI and option
482		    'specf:y' is required in order to enable this feature.
483		  . Memory Read Line is not enabled for 875 and 875-like chips.
484		  . Programmed burst length set to 64 DWORDS (instead of 128).
485		    (Note: SYMBIOS uses 32 DWORDS for the SDMS BIOS)
486		- Add 'buschk' boot option.
487		  This option enables checking of SCSI BUS data lines after SCSI 
488		  RESET (set by default). (Submitted by Richard Waltham).
489		- Update the README file.
490		- Dispatch CONDITION MET and RESERVATION CONFLICT scsi status 
491		  as OK driver status.
492		- Update the README file and the Symbios NVRAM format definition 
493		  with removable media flags values (available with SDMS 4.09).
494		- Several PCI configuration registers fix-ups for powerpc.
495		  (Patch sent by Cort).
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