Add support for CVT 3 byte codes & VTB-EXT blocks. Other misc fixes.

Detail:
  c/ScrModes, h/modex - Added support for CVT 3 byte codes & VTB-EXT blocks. Add framework for sorting modes by EDID priority. Move CEA extension block handling into its own function & increase error checking.
  Resources/Germany/CmdHelp, Resources/UK/CmdHelp - Fix missing message token & incorrect syntax of syntax message
Admin:
  Code submission from William Harden
  Tested on Raspberry Pi


Version 0.47. Tagged as 'ScrModes-0_47'

VersionNum

-/* (0.46)
+/* (0.47)
  *
  * This file is automatically maintained by srccommit, do not edit manually.
  * Last processed by srccommit version: 1.1.
  *
  */
-#define Module_MajorVersion_CMHG        0.46
+#define Module_MajorVersion_CMHG        0.47
 #define Module_MinorVersion_CMHG        
-#define Module_Date_CMHG                16 Feb 2015
+#define Module_Date_CMHG                20 Feb 2015
 
-#define Module_MajorVersion             "0.46"
-#define Module_Version                  46
+#define Module_MajorVersion             "0.47"
+#define Module_Version                  47
 #define Module_MinorVersion             ""
-#define Module_Date                     "16 Feb 2015"
+#define Module_Date                     "20 Feb 2015"
 
-#define Module_ApplicationDate          "16-Feb-15"
+#define Module_ApplicationDate          "20-Feb-15"
 
 #define Module_ComponentName            "ScrModes"
 #define Module_ComponentPath            "castle/RiscOS/Sources/Video/UserI/ScrModes"
 
-#define Module_FullVersion              "0.46"
-#define Module_HelpVersion              "0.46 (16 Feb 2015)"
-#define Module_LibraryVersionInfo       "0:46"
+#define Module_FullVersion              "0.47"
+#define Module_HelpVersion              "0.47 (20 Feb 2015)"
+#define Module_LibraryVersionInfo       "0:47"

h/modex

@@ -141,7 +141,7 @@ typedef struct
     uint32_t external_clock;            /* rate of external clock in kHz (use it instead of VCO), or -1 */
     uint8_t  syncpol;                   /* sync polarity code (0..3 for now) */
     uint8_t  interlaced;                /* whether mode is interlaced using two seperate framebuffers (0 or 1) */
-    uint8_t  freq, spare2;            /* explicit padding so struct is N*4 bytes long */
+    uint8_t  freq, spare2;              /* explicit padding so struct is N*4 bytes long */
 } ModeDefinition;
 
 /* As stored internally by ScreenModes module */
@@ -154,6 +154,16 @@ typedef struct mode_description_
     uint32_t line_hz;                   /* line rate in Hz (for diagnostics only) */
     uint32_t frame_hz:8;                /* frame rate in Hz, for user frame rate selection */
     uint32_t frame_mhz:24;              /* also in mHz (millihertz), for more precise cmp */
+    uint8_t  priority;                  /* Bits 0-2 = 'Parameter type' - where did the definition come from? (EDID 1.4 Section 5 */
+                                        /*            0 = Undefined (MDF or something which overrides all else) */
+                                        /*            1 = Preferred Timing Mode from base EDID */
+                                        /*            2 = A Detailed timing mode in the base EDID */
+                                        /*            3 = Any detailed timing modes in extension blocks */
+                                        /*            4 = Any optional 3-byte CVT codes in the base EDID or extension block */
+                                        /*            5 = Standard Timings listed in Base EDID or extension blocks */
+                                        /*            6 = Additional timing mode information: Established Timings I, II, III, */
+                                        /*                default GTF, GTF secondary curve and CVT */
+                                        /*            7 = Base VIDEO MODE (defined as 640 X 480 X 60Hz). */
 } ModeDescription, *ModeDescriptionRef;
 
 /* Description of a monitor & its associated modes */