Treat memory sizes as unsigned

Detail:
  s/Switcher - Treat memory sizes as unsigned values. We don't deal with negative sizes, so there's no reason to be using signed arithmetic.
Admin:
  Tested on BB-xM


Version 1.42. Tagged as 'Switcher-1_42'

VersionASM

@@ -11,13 +11,13 @@
                         GBLS    Module_HelpVersion
                         GBLS    Module_ComponentName
                         GBLS    Module_ComponentPath
-Module_MajorVersion     SETS    "1.41"
-Module_Version          SETA    141
+Module_MajorVersion     SETS    "1.42"
+Module_Version          SETA    142
 Module_MinorVersion     SETS    ""
-Module_Date             SETS    "17 Nov 2012"
-Module_ApplicationDate  SETS    "17-Nov-12"
+Module_Date             SETS    "23 Jul 2014"
+Module_ApplicationDate  SETS    "23-Jul-14"
 Module_ComponentName    SETS    "Switcher"
 Module_ComponentPath    SETS    "castle/RiscOS/Sources/Desktop/Switcher"
-Module_FullVersion      SETS    "1.41"
-Module_HelpVersion      SETS    "1.41 (17 Nov 2012)"
+Module_FullVersion      SETS    "1.42"
+Module_HelpVersion      SETS    "1.42 (23 Jul 2014)"
                         END

VersionNum

-/* (1.41)
+/* (1.42)
  *
  * This file is automatically maintained by srccommit, do not edit manually.
  * Last processed by srccommit version: 1.1.
  *
  */
-#define Module_MajorVersion_CMHG        1.41
+#define Module_MajorVersion_CMHG        1.42
 #define Module_MinorVersion_CMHG        
-#define Module_Date_CMHG                17 Nov 2012
+#define Module_Date_CMHG                23 Jul 2014
 
-#define Module_MajorVersion             "1.41"
-#define Module_Version                  141
+#define Module_MajorVersion             "1.42"
+#define Module_Version                  142
 #define Module_MinorVersion             ""
-#define Module_Date                     "17 Nov 2012"
+#define Module_Date                     "23 Jul 2014"
 
-#define Module_ApplicationDate          "17-Nov-12"
+#define Module_ApplicationDate          "23-Jul-14"
 
 #define Module_ComponentName            "Switcher"
 #define Module_ComponentPath            "castle/RiscOS/Sources/Desktop/Switcher"
 
-#define Module_FullVersion              "1.41"
-#define Module_HelpVersion              "1.41 (17 Nov 2012)"
-#define Module_LibraryVersionInfo       "1:41"
+#define Module_FullVersion              "1.42"
+#define Module_HelpVersion              "1.42 (23 Jul 2014)"
+#define Module_LibraryVersionInfo       "1:42"

s/Switcher

@@ -3089,10 +3089,10 @@ setmemstring
         Push    "R0-R2,LR"
 ;
         LDR     R0,[userblk,#icb_memsize]
-        MOV     R0,R0,ASR #10           ; R0 = memory size in K
+        MOV     R0,R0,LSR #10           ; R0 = memory size in K
         ADD     R1,R1,#i_data           ; R1 --> buffer
         MOV     R2,#11                  ; R2 = buffer size-1 (for "K")
-        SWI     XOS_ConvertInteger4
+        SWI     XOS_ConvertCardinal4
         MOVVS   R14,#"?"                ; use "?" to report errors!
         MOVVC   R14,#"K"
         STRB    R14,[R1],#1
@@ -3139,13 +3139,13 @@ setmembar
         MOV     R2,#512*1024
 03
         CMP     R1,R2
-        ADDLT   R14,R3,R1, LSR R0
-        BLT     %FT05
+        ADDLO   R14,R3,R1, LSR R0
+        BLO     %FT05
         ADD     R3,R3,#512*1024
         SUB     R1,R1,R2
         ADD     R0,R0,#1
-        MOV     R2,R2, LSL #1
-        B       %BT03
+        MOVS    R2,R2, LSL #1
+        BNE     %BT03
 05
         Pull    "R0-R3"
         ]
@@ -3178,13 +3178,13 @@ calcbarcoords
         MOV     cy1,#512*1024
 03
         CMP     R1,cy1
-        ADDLT   R1,R14,R1, LSR R0
-        BLT     %FT05
+        ADDLO   R1,R14,R1, LSR R0
+        BLO     %FT05
         ADD     R14,R14,#512*1024
         SUB     R1,R1,cy1
         ADD     R0,R0,#1
-        MOV     cy1,cy1, LSL #1
-        B       %BT03
+        MOVS    cy1,cy1, LSL #1
+        BNE     %BT03
 05
 07
         ]
@@ -4719,13 +4719,13 @@ null_event      ROUT
         MOV     R1,R0
 03
         CMP     R1,R4
-        ADDLT   R0,R14,R1, LSL R3       ; want result in R0
-        BLT     %FT05
+        ADDLO   R0,R14,R1, LSL R3       ; want result in R0
+        BLO     %FT05
         ADD     R14,R14,R2
         SUB     R1,R1,R4
         ADD     R3,R3,#1
-        MOV     R2,R2, LSL #1
-        B       %BT03
+        MOVS    R2,R2, LSL #1
+        BNE     %BT03
 05
         Pull    "R2-R4"
         ]
@@ -6501,7 +6501,7 @@ setmemcommand
         BL      writestr                ; output prefix
 
         SUB     sp,sp,#8
-        MOVVC   R0,R1,ASR #10           ; R0 = size in K
+        MOVVC   R0,R1,LSR #10           ; R0 = size in K
         MOVVC   R1,sp
         MOVVC   R2,#8                   ; allows for up to 9999999K
         SWIVC   XOS_ConvertCardinal4