Adjust handling of OS_ReadSysInfo 4

Detail:
  s/Middle - If the HAL provides an extended machine ID, make sure OS_ReadSysInfo 4 doesn't return a MAC address. This is because the old-style machine ID which the MAC is extracted from will be completely synthetic and is so known not to contain a MAC (even if it may look like it does)
Admin:
  Tested on BB-xM, Raspberry Pi


Version 5.35, 4.79.2.188. Tagged as 'Kernel-5_35-4_79_2_188'

VersionASM

@@ -13,11 +13,11 @@
                         GBLS    Module_ComponentPath
 Module_MajorVersion     SETS    "5.35"
 Module_Version          SETA    535
-Module_MinorVersion     SETS    "4.79.2.187"
+Module_MinorVersion     SETS    "4.79.2.188"
 Module_Date             SETS    "07 Apr 2013"
 Module_ApplicationDate  SETS    "07-Apr-13"
 Module_ComponentName    SETS    "Kernel"
 Module_ComponentPath    SETS    "castle/RiscOS/Sources/Kernel"
-Module_FullVersion      SETS    "5.35 (4.79.2.187)"
-Module_HelpVersion      SETS    "5.35 (07 Apr 2013) 4.79.2.187"
+Module_FullVersion      SETS    "5.35 (4.79.2.188)"
+Module_HelpVersion      SETS    "5.35 (07 Apr 2013) 4.79.2.188"
                         END

VersionNum

@@ -5,12 +5,12 @@
  *
  */
 #define Module_MajorVersion_CMHG        5.35
-#define Module_MinorVersion_CMHG        4.79.2.187
+#define Module_MinorVersion_CMHG        4.79.2.188
 #define Module_Date_CMHG                07 Apr 2013
 
 #define Module_MajorVersion             "5.35"
 #define Module_Version                  535
-#define Module_MinorVersion             "4.79.2.187"
+#define Module_MinorVersion             "4.79.2.188"
 #define Module_Date                     "07 Apr 2013"
 
 #define Module_ApplicationDate          "07-Apr-13"
@@ -18,6 +18,6 @@
 #define Module_ComponentName            "Kernel"
 #define Module_ComponentPath            "castle/RiscOS/Sources/Kernel"
 
-#define Module_FullVersion              "5.35 (4.79.2.187)"
-#define Module_HelpVersion              "5.35 (07 Apr 2013) 4.79.2.187"
+#define Module_FullVersion              "5.35 (4.79.2.188)"
+#define Module_HelpVersion              "5.35 (07 Apr 2013) 4.79.2.188"
 #define Module_LibraryVersionInfo       "5:35"

s/Middle

@@ -1553,6 +1553,13 @@ IOST_BATMAN     * 64    ;Stork keyboard/battery controller seems to be present
 ;                 by this call in preference to a locally provided value.
 
 40
+        Push    "r2-r3,r9,r14"
+        AddressHAL
+        MOV     r0, #0
+        CallHAL HAL_ExtMachineID
+        Pull    "r2-r3,r9,r14"
+        TEQ     r0, #0
+        BNE     ExitNoEthernetAddress                   ; Extended machine ID is implemented - don't attempt to extract a MAC from RawMachineID, it's just a hash of the extended ID
         LDR     r0, =ZeroPage
         LDRB    r1, [ r0, #RawMachineID ]               ; The family byte
         TEQ     r1, #&81                                ; Excellent,a custom part - we'll use it