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Edits to the RISCOS header file should really have gone through the
allocations system. Fortunately, no harm was done in this case, but a
minor syntactical change is required in order to bring it in line with
the automatic redaction scripts used when exporting the header from the
allocations database.

Version 6.37. Not tagged

* Listen out for PointerV 9, which (RISC OS 5) mouse drivers use to
indicate scroll wheel updates + extra button status
* Changes in the state of the extra buttons are treated the same as
changes to normal mouse buttons: signalled via Event_Mouse, and stored
in the mouse buffer (for reading via OS_Mouse).
* Changes in the scroll wheel(s) are signalled via Event_Expansion,4. If
the event vector call is unclaimed, the kernel's wheel position
accumulators will be updated
* Wheel position accumulators can be read via OS_Pointer 2
* Wheel position accumulators implement "wrap to zero" logic on overflow

This matches RISCOS Ltd's implementation
(http://www.riscos.com/support/developers/riscos6/input/pointerdevices.html),
except that:

* The kernel currently doesn't call PointerV 4, so PointerV 9 is the
only way drivers can report wheel + extra button status
* Extra mouse buttons don't generate KeyV transitions
* Our implementation is in the kernel, not an OSPointer module

Version 6.37. Tagged as 'Kernel-6_37'

Version 6.03. Tagged as 'Kernel-6_03'

Detail:
  Resolve allocation clash for vector &2C.  It appears that RISCOS Ltd used
  this vector in RISC OS 6 without getting it allocated - they really should
  have known better, since Hdr:RISCOS has always one of the header files
  centrally managed and coordinated between the two forks of RISC OS.
  Resolved by moving SeriousErrorV to &2D since it is a relatively recent
  addition (April 2016) and hasn't yet featured in a stable RISC OS 5
  release.
  Also correct some comments elsewhere in Hdr:RISCOS.


Version 6.01. Tagged as 'Kernel-6_01'

Version 5.87. Not tagged

Version 5.81. Tagged as 'Kernel-5_81'

Version 5.35, 4.79.2.312. Tagged as 'Kernel-5_35-4_79_2_312'

The kernel already looks after all other aspects of the ARM CPU, so can look after the cache control command too.
 HelpStrs.s:New tokens for help and syntax
 CmdHelp.s:UK help and syntax
 Arthur3.s:Tables updates for *CONFIGURE/STATUS, lined some stuff up, default error text sync'd with Hdr:NewErrors
 MoreComms.s:Parsing and doing of *CACHE
 Utility.s:Hashing table updated for *CACHE
Other minor changes
 hdr/Options:Bring 'MosVer' into the private header
 hdr/RISCOS:aasm aliases for SP removed, MainVars and MosVer made private, added definition of the start of application space
 HeapMan.s:Use of GRAB changed to Pull
 Offset of TutuCMOS changed for more informative PrintSoundCMOS
 PMF/osbyte.s:Use OsBytes header file in place of MainVars

Version 5.35, 4.79.2.151. Tagged as 'Kernel-5_35-4_79_2_151'

Export less in hdr:RISCOS.
Delete unused GetDecimalPair routine.
Move CheckYear with other RTC stuff out of PMF/osword.
Hide DebugROMInit and DebugROMErrors in release (even numbered) versions.

Version 5.35, 4.79.2.127. Tagged as 'Kernel-5_35-4_79_2_127'

Delete pmf/convdate, moved to conversions.
Moved OS_BinaryToDecimal to conversions.
Remove OS_ConvertHex16 and friends.
Add OS_ConvertVariform skeleton.
Tidied conversions.

Version 5.35, 4.79.2.125. Tagged as 'Kernel-5_35-4_79_2_125'

Clean reimport of hdr.RISCOS (real commit date 2008-03-28 by bavison), without any of the 3rd party allocations.