Fix to OS_FSControl 13 when no territory is loaded

Detail:
  PRM2-97 describes filing system name matching as case insensitive. However, the Internat_LowerCase macro is a no-op when there's no case conversion table, such as prior to the territory loading.
  Change FindFSName to use an case insensitive ASCII match until the territory starts.
  Fixes a problem with EtherUSB failing to start because it was using Devices: (rather than devices:). A global search of the sources shows SerMouse and the Kernel would also be affected.
Admin:
  Submission from Colin Granville.

Version 2.85. Tagged as 'FileSwitch-2_85'

VersionASM

@@ -11,13 +11,13 @@
                         GBLS    Module_HelpVersion
                         GBLS    Module_ComponentName
                         GBLS    Module_ComponentPath
-Module_MajorVersion     SETS    "2.84"
-Module_Version          SETA    284
+Module_MajorVersion     SETS    "2.85"
+Module_Version          SETA    285
 Module_MinorVersion     SETS    ""
-Module_Date             SETS    "08 May 2016"
-Module_ApplicationDate  SETS    "08-May-16"
+Module_Date             SETS    "15 Apr 2017"
+Module_ApplicationDate  SETS    "15-Apr-17"
 Module_ComponentName    SETS    "FileSwitch"
 Module_ComponentPath    SETS    "castle/RiscOS/Sources/FileSys/FileSwitch"
-Module_FullVersion      SETS    "2.84"
-Module_HelpVersion      SETS    "2.84 (08 May 2016)"
+Module_FullVersion      SETS    "2.85"
+Module_HelpVersion      SETS    "2.85 (15 Apr 2017)"
                         END

VersionNum

-/* (2.84)
+/* (2.85)
  *
  * This file is automatically maintained by srccommit, do not edit manually.
  * Last processed by srccommit version: 1.1.
  *
  */
-#define Module_MajorVersion_CMHG        2.84
+#define Module_MajorVersion_CMHG        2.85
 #define Module_MinorVersion_CMHG        
-#define Module_Date_CMHG                08 May 2016
+#define Module_Date_CMHG                15 Apr 2017
 
-#define Module_MajorVersion             "2.84"
-#define Module_Version                  284
+#define Module_MajorVersion             "2.85"
+#define Module_Version                  285
 #define Module_MinorVersion             ""
-#define Module_Date                     "08 May 2016"
+#define Module_Date                     "15 Apr 2017"
 
-#define Module_ApplicationDate          "08-May-16"
+#define Module_ApplicationDate          "15-Apr-17"
 
 #define Module_ComponentName            "FileSwitch"
 #define Module_ComponentPath            "castle/RiscOS/Sources/FileSys/FileSwitch"
 
-#define Module_FullVersion              "2.84"
-#define Module_HelpVersion              "2.84 (08 May 2016)"
-#define Module_LibraryVersionInfo       "2:84"
+#define Module_FullVersion              "2.85"
+#define Module_HelpVersion              "2.85 (15 Apr 2017)"
+#define Module_LibraryVersionInfo       "2:85"

s/FSCtrl2

@@ -590,7 +590,7 @@ FindFSName Entry "r0,r2,r3,r5"
         ; Don't even try to match against image filing systems
         LDRB    r14, [fscb, #fscb_info]
         TEQ     r14, #0
-        BEQ     %FT25
+        BEQ     %FT35
 
         MOV     r2, r1                  ; r2 -> Filing System name to test
         ADD     r5, fscb, #fscb_name    ; r5 -> fscb name field
@@ -607,12 +607,20 @@ FindFSName Entry "r0,r2,r3,r5"
 
 20
         Internat_CaseConvertLoad r14,Lower
+        TEQ     r14, #Nowt
+        BEQ     %FT25                   ; No territory loaded, no case
+                                        ; conversion table. Use ASCII.
         Internat_LowerCase r0, r14
         Internat_LowerCase r3, r14
+        B       %FT30
+25
+        ASCII_LowerCase r0, r14
+        ASCII_LowerCase r3, r14
+30
         TEQ     r0, r3                  ; Loop if still matching
         BEQ     %BT15
 
-25
+35
         LDR     fscb, [fscb, #fscb_link] ; Try next fscb then
         B       %BT10