Added method to find SCSI ID and partition offset from icon number

Detail:
   SCSIFS_Partitions reason code 1 already provides the icon number
   for a given SCSI ID and partition offset. Reason code 2 provides
   the inverse function to this.
Admin:
  tested on iMx6


Version 1.35. Tagged as 'SCSIFS-1_35'

Doc/NewSWI

@@ -16,9 +16,18 @@ SWI  SCSIFS_Partitions   &40995
 
    Reason code:  1:Enquire SCSIFS disc number
    R0 = 1
+   R1 = Drive number (0..7)
+   R2 = Sector offset to base of image
  returns
    R2 = SCSIFS disc icon (0..7), or -1 if none
 
+   Reason code:  2:Enquire Drive number and offset
+   R0 = 1
+   R1 = SCSIFS disc number (0..7)
+ returns
+   R1 = Drive number (0..7)
+   R2 = Sector offset to base of image
+
 
 New SCSIFS Service Call
 

VersionASM

@@ -11,13 +11,13 @@
                         GBLS    Module_HelpVersion
                         GBLS    Module_ComponentName
                         GBLS    Module_ComponentPath
-Module_MajorVersion     SETS    "1.34"
-Module_Version          SETA    134
+Module_MajorVersion     SETS    "1.35"
+Module_Version          SETA    135
 Module_MinorVersion     SETS    ""
-Module_Date             SETS    "16 Jul 2018"
-Module_ApplicationDate  SETS    "16-Jul-18"
+Module_Date             SETS    "20 Jul 2018"
+Module_ApplicationDate  SETS    "20-Jul-18"
 Module_ComponentName    SETS    "SCSIFS"
 Module_ComponentPath    SETS    "castle/RiscOS/Sources/FileSys/SCSIFS/SCSIFS"
-Module_FullVersion      SETS    "1.34"
-Module_HelpVersion      SETS    "1.34 (16 Jul 2018)"
+Module_FullVersion      SETS    "1.35"
+Module_HelpVersion      SETS    "1.35 (20 Jul 2018)"
                         END

VersionNum

-/* (1.34)
+/* (1.35)
  *
  * This file is automatically maintained by srccommit, do not edit manually.
  * Last processed by srccommit version: 1.1.
  *
  */
-#define Module_MajorVersion_CMHG        1.34
+#define Module_MajorVersion_CMHG        1.35
 #define Module_MinorVersion_CMHG        
-#define Module_Date_CMHG                16 Jul 2018
+#define Module_Date_CMHG                20 Jul 2018
 
-#define Module_MajorVersion             "1.34"
-#define Module_Version                  134
+#define Module_MajorVersion             "1.35"
+#define Module_Version                  135
 #define Module_MinorVersion             ""
-#define Module_Date                     "16 Jul 2018"
+#define Module_Date                     "20 Jul 2018"
 
-#define Module_ApplicationDate          "16-Jul-18"
+#define Module_ApplicationDate          "20-Jul-18"
 
 #define Module_ComponentName            "SCSIFS"
 #define Module_ComponentPath            "castle/RiscOS/Sources/FileSys/SCSIFS/SCSIFS"
 
-#define Module_FullVersion              "1.34"
-#define Module_HelpVersion              "1.34 (16 Jul 2018)"
-#define Module_LibraryVersionInfo       "1:34"
+#define Module_FullVersion              "1.35"
+#define Module_HelpVersion              "1.35 (20 Jul 2018)"
+#define Module_LibraryVersionInfo       "1:35"

s/ScsiFs50

@@ -469,8 +469,9 @@ DoSWIPartitions ROUT
         STR     R2, [LR, #:INDEX:PartitionBaseAdd-:INDEX:SCSIFSWorkBase] ; remember
         Pull    "R1,R2,PC"
 1
-        TEQ     R0, #1                  ; report icon used
-        Pull    "R1,R2,PC",NE
+        TEQ     R0, #1                 ; report icon used
+        BNE     %FT6                   ; report ID and offset for icon
+
         Push    "R3,R4,R5"
         MOV     R2, #MaxDriveNo-1
         LDR     R5, [SP, #4*4]         ; retrieve R2 off stack
@@ -490,6 +491,21 @@ DoSWIPartitions ROUT
         Pull    "R3,R4,R5"
         STR     R2,[R13, #4]            ; update R2 return value
         Pull    "R1,R2,PC"
+
+6
+        TEQ     R0, #2                 ; report id & offset for icon
+        Pull    "R1,R2,PC",NE
+
+        Push    "R3,R4,R5"
+
+        DrvRecPtr R4, R1
+        ADD     LR, SB, R1, LSL #2      ; word offset
+        LDRB    R1, [R4, #:INDEX:DevNo]
+        LDR     R2, [LR, #:INDEX:PartitionBaseAdd-:INDEX:SCSIFSWorkBase] ;
+
+        Pull    "R3,R4,R5"
+        ADD     sp, sp, #4*2            ; forget stored r1 and r2
+        Pull    "PC"
       ]
 
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