Added 'sim6502' and 'sim65C02' targets.

The targets allow to run cc65 programs in the sim65 exection
einvironment. As there are no "real" i/o facilities there's no
need for header files. Paravirtualized entry points are mapped
to $FFF0 ff. There's a large cc65 progam area from $0200-$FFEF.

The binary format includes a one-byte header indicating the required
execution environment: The value 0 means 6502 and the value 1
means 65C02. The load adress for the binary is fixed to $0200.

Note: Running sim65C02 programs currently doesn't work bcause
sim65 doesn't actually implement 65C02 opcodes.

src/ca65/main.c

@@ -283,6 +283,14 @@ static void SetSys (const char* Sys)
             NewSymbol ("__LYNX__", 1);
             break;
 
+        case TGT_SIM6502:
+            NewSymbol ("__SIM6502__", 1);
+            break;
+
+        case TGT_SIM65C02:
+            NewSymbol ("__SIM65C02__", 1);
+            break;
+
         default:
             AbEnd ("Invalid target name: `%s'", Sys);
 

src/cc65/main.c

@@ -239,6 +239,14 @@ static void SetSys (const char* Sys)
             DefineNumericMacro ("__LYNX__", 1);
             break;
 
+        case TGT_SIM6502:
+            DefineNumericMacro ("__SIM6502__", 1);
+            break;
+
+        case TGT_SIM65C02:
+            DefineNumericMacro ("__SIM65C02__", 1);
+            break;
+
         default:
             AbEnd ("Unknown target system type %d", Target);
     }

src/common/target.c

@@ -142,6 +142,8 @@ static const TargetEntry TargetMap[] = {
     {   "none",         TGT_NONE        },
     {   "pet",          TGT_PET         },
     {   "plus4",        TGT_PLUS4       },
+    {   "sim6502",      TGT_SIM6502     },
+    {   "sim65c02",     TGT_SIM65C02    },
     {   "supervision",  TGT_SUPERVISION },
     {   "vc20",         TGT_VIC20       },
     {   "vic20",        TGT_VIC20       },
@@ -172,6 +174,8 @@ static const TargetProperties PropertyTable[TGT_COUNT] = {
     { "nes",            CPU_6502,       BINFMT_BINARY,      CTNone  },
     { "supervision",    CPU_65SC02,     BINFMT_BINARY,      CTNone  },
     { "lynx",           CPU_65C02,      BINFMT_BINARY,      CTNone  },
+    { "sim6502",        CPU_6502,       BINFMT_BINARY,      CTNone  },
+    { "sim65c02",       CPU_65C02,      BINFMT_BINARY,      CTNone  },
 };
 
 /* Target system */

src/common/target.h

@@ -73,6 +73,8 @@ typedef enum {
     TGT_NES,
     TGT_SUPERVISION,
     TGT_LYNX,
+    TGT_SIM6502,
+    TGT_SIM65C02,
     TGT_COUNT                   /* Number of target systems */
 } target_t;