diff --git a/asm6502.c b/asm6502.c
index 8f01af2..c159096 100644
--- a/asm6502.c
+++ b/asm6502.c
@@ -221,7 +221,8 @@ enum {
    ERR_MAX_IF,
    ERR_PHASE,
    ERR_PHASE_SIZE,
-   ERR_DIV_BY_ZERO
+   ERR_DIV_BY_ZERO,
+   ERR_CPU_UNSUPPORTED
 };
 
 static char *err_msg[] = {
@@ -257,7 +258,8 @@ static char *err_msg[] = {
    "too many if nesting levels",
    "symbol value mismatch between pass one and two",
    "pass two code size greater than pass one code size",
-   "division by zero"
+   "division by zero",
+   "CPU not supported"
 };
 
 enum {
@@ -545,7 +547,7 @@ static value number( char **p ) {
 }
 
 
-static void ident_( char **p, char *id, int numeric ) {
+static void ident( char **p, char *id, int numeric, int uppercase ) {
    int i = 0;
 
    if (( !numeric && !isalpha( **p ) && ( **p != '_' ))
@@ -553,7 +555,7 @@ static void ident_( char **p, char *id, int numeric ) {
       error( ERR_ID );
 
    do {
-      *id++ = *( *p )++;
+      *id++ = (char) ( uppercase ? toupper( *( *p )++ ) : *( *p )++ );
       i++;
       if ( i >= ID_LEN ) error( ERR_ID_LEN );
    } while ( isalnum( **p ) || ( **p == '_' ));
@@ -562,33 +564,6 @@ static void ident_( char **p, char *id, int numeric ) {
 }
 
 
-/* read identifier which may not start with a digit */
-static void ident( char **p, char *id ) {
-   ident_( p, id, 0 );
-}
-
-
-/* read identifier which may start with a digit */
-static void numbered_ident( char **p, char *id ) {
-   ident_( p, id, 1 );
-}
-
-
-/* read identifier and convert to upper case */
-static void ident_uppercase( char **p, char *id ) {
-   int i = 0;
-
-   if ( !isalpha( **p )) error( ERR_ID );
-   do {
-      *id++ = (char) toupper( *( *p )++ );
-      i++;
-      if ( i >= ID_LEN ) error( ERR_ID_LEN );
-   } while ( isalnum( **p ));
-
-   *id = '\0';
-}
-
-
 static value expr( char ** );
 
 
@@ -608,7 +583,7 @@ static value primary( char **p ) {
       ( *p ) += 2;
    } else if ( **p == LOCAL_LABEL_LETTER && isalnum( *( *p + 1 ))) {  /* local label*/
       ( *p )++;
-      numbered_ident( p, id );
+      ident( p, id, 1, 0 );
       sym = lookup( id, current_label->locals );
       if ( sym ) {
          res = sym->value;
@@ -630,14 +605,14 @@ static value primary( char **p ) {
       if ( **p != '\'' ) error( ERR_CHR );
       ( *p )++;
    } else if ( isalpha( **p )) {
-      ident( p, id );
+      ident( p, id, 0, 0 );
       sym = lookup( id, NULL);
       if ( !sym ) sym = reserve_label( id, NULL);
       skip_white( p );
       if ( **p == LOCAL_LABEL_LETTER ) {
          /* qualified identifier: local label or variable */
          ( *p )++;
-         numbered_ident( p, id );
+         ident( p, id, 1, 0 );
          local_sym = lookup( id, sym->locals );
          if ( !local_sym ) local_sym = reserve_label( id, sym );
          res = local_sym->value;
@@ -956,7 +931,7 @@ static void to_uppercase( char *p ) {
 
 
 static instruction_desc *get_instruction_descr( const char *p ) {
-   int l = 0, r = sizeof( instruction_tbl ) / sizeof( instruction_desc ), x;
+   int l = 0, r = instruction_tbl_size, x;
    int cmp;
 
    while ( r >= l ) {
@@ -1040,6 +1015,19 @@ static void emit_instr_2( instruction_desc *instr, int am, u16 o ) {
 }
 
 
+/* emit instruction with byte argument */
+static void emit_instr_2p( instruction_desc *instr, int am, u8 o, u8 p ) {
+   if ( pass == 2 ) {
+      if ( oc < code_size - 2 ) {
+         code[oc] = instr->op[am];
+         code[oc + 1] = o;
+         code[oc + 2] = p;
+      } else error( ERR_PHASE_SIZE );
+   }
+   oc += 3;
+}
+
+
 static int instruction_imp_acc( instruction_desc *instr ) {
    int am = AM_INV;
 
@@ -1068,8 +1056,7 @@ static int instruction_imm( char **p, instruction_desc *instr ) {
 }
 
 
-static int instruction_rel( instruction_desc *instr, value v ) {
-   int am = AM_REL;
+static u16 calculate_offset( value v ) {
    u16 pct = pc + 2u;
    u16 off;
 
@@ -1086,9 +1073,14 @@ static int instruction_rel( instruction_desc *instr, value v ) {
    }
    if ( v.v >= pct ) off = v.v - pct;
    else off = (u16) (( ~0u ) - ( pct - v.v - 1u ));
-   emit_instr_1( instr, am, off & 0xffu );
+   return off;
+}
 
-   return am;
+
+static int instruction_rel( instruction_desc *instr, value v ) {
+   u16 off = calculate_offset( v );
+   emit_instr_1( instr, AM_REL, off & 0xffu );
+   return AM_REL;
 }
 
 
@@ -1105,23 +1097,26 @@ static int instruction_ind( char **p, instruction_desc *instr ) {
    /* indirect X addressing mode? */
    if ( **p == ',' ) {
       skip_curr_and_white( p );
-      ident_uppercase( p, id );
+      ident( p, id, 0, 1 );
       if ( strcmp( id, "X" ) != 0 ) error( ERR_INX );
-      am = AM_INX;
+      if ( AM_VALID( *instr, AM_AIX )) am = AM_AIX;
+      else am = AM_ZIX;
       skip_white( p );
       if ( **p != ')' ) error( ERR_CLOSING_PAREN );
       skip_curr_and_white( p );
+
    } else {
       if ( **p != ')' ) error( ERR_CLOSING_PAREN );
       skip_curr_and_white( p );
       /* indirect Y addressing mode? */
       if ( **p == ',' ) {
          skip_curr_and_white( p );
-         ident_uppercase( p, id );
+         ident( p, id, 0, 1 );
          if ( strcmp( id, "Y" ) != 0 ) error( ERR_INY );
-         am = AM_INY;
+         am = AM_ZIY;
       } else {
-         am = AM_IND;
+         if ( AM_VALID( *instr, AM_ZIN )) am = AM_ZIN;
+         else am = AM_AIN;
       }
    }
 
@@ -1129,11 +1124,12 @@ static int instruction_ind( char **p, instruction_desc *instr ) {
 
    if ( pass == 2 ) {
       if ( UNDEFINED( v )) error( ERR_UNDEF );
-      if ((( am == AM_INX ) || am == ( AM_INY )) && (TYPE( v ) != TYPE_BYTE ))
+      if (( am == AM_ZIX || am == AM_ZIY || am == AM_ZIN )
+          && (TYPE( v ) != TYPE_BYTE ))
          error( ERR_ILLEGAL_TYPE );
    }
 
-   if ( am == AM_IND ) {
+   if ( am == AM_AIN || am == AM_AIX ) {
       emit_instr_2( instr, am, v.v );
    } else {
       emit_instr_1( instr, am, (u8) v.v );
@@ -1158,7 +1154,7 @@ static int instruction_abxy_zpxy( char **p, instruction_desc *instr, value v ) {
       if ( UNDEFINED( v )) error( ERR_UNDEF );
    }
 
-   ident_uppercase( p, id );
+   ident( p, id, 0, 1 );
    /* test for absolute and zero-page X addressing */
    if ( !strcmp( id, "X" )) {
       if ((TYPE( v ) == TYPE_BYTE ) && AM_VALID( *instr, AM_ZPX )) am = AM_ZPX;
@@ -1169,7 +1165,7 @@ static int instruction_abxy_zpxy( char **p, instruction_desc *instr, value v ) {
       } else error( ERR_AM );
    }
 
-   /* test for absolute and zero-page Y addressing */
+      /* test for absolute and zero-page Y addressing */
    else if ( !strcmp( id, "Y" )) {
       if ((TYPE( v ) == TYPE_BYTE ) && AM_VALID( *instr, AM_ZPY )) am = AM_ZPY;
       else if ( AM_VALID( *instr, AM_ABY )) {
@@ -1212,6 +1208,26 @@ static int instruction_abs_zp( instruction_desc *instr, value v ) {
 }
 
 
+/* bit branch, bit set/reset instructions */
+static int instruction_zp_rel( char **p, instruction_desc *instr, value v ) {
+   u16 off;
+   value rel;
+
+   if ( TYPE( v ) != TYPE_BYTE )
+      error( ERR_BYTE_RANGE );
+
+   rel = expr( p );
+   off = calculate_offset( rel );
+
+   if ( pass == 2 ) {
+      if ( UNDEFINED( v ) || UNDEFINED( rel )) error( ERR_UNDEF );
+   }
+   emit_instr_2p( instr, AM_ZPR, (u8) v.v, off );
+
+   return AM_ZPR;
+}
+
+
 /* process one instruction */
 static void instruction( char **p ) {
    char id[ID_LEN];
@@ -1220,7 +1236,7 @@ static void instruction( char **p ) {
    value v;
 
    /* first get instruction for given mnemonic */
-   ident_uppercase( p, id );
+   ident( p, id, 0, 1 );
    instr = get_instruction_descr( id );
    if ( !instr ) error( ERR_INSTR );
 
@@ -1248,7 +1264,8 @@ static void instruction( char **p ) {
          /* else we go through the possible absolute addressing modes */
       else if ( **p == ',' ) {
          skip_curr_and_white( p );
-         am = instruction_abxy_zpxy( p, instr, v );
+         if ( AM_VALID( *instr, AM_ZPR )) am = instruction_zp_rel( p, instr, v );
+         else am = instruction_abxy_zpxy( p, instr, v );
       }
          /* must be absolute or zero-page addressing */
       else {
@@ -1688,12 +1705,27 @@ static void directive_assert( char **p, int on_pass ) {
 }
 
 
+static void directive_cpu( char **p ) {
+   char cpu_type[ID_LEN];
+
+   skip_white(p);
+   ident( p, cpu_type, 1, 1 );
+   if ( !strcmp( cpu_type, "6502" )) {
+      select_6502();
+   } else if ( !strcmp( cpu_type, "65C02" )) {
+      select_65c02();
+   } else {
+      error( ERR_CPU_UNSUPPORTED );
+   }
+}
+
+
 static int directive( char **p ) {
    char id[ID_LEN];
    value v;
    int again = 0;
 
-   ident_uppercase( p, id );
+   ident( p, id, 0, 1 );
 
    if ( !strcmp( id, "ORG" )) {
       v = expr( p );
@@ -1727,6 +1759,8 @@ static int directive( char **p ) {
    } else if ( !strcmp( id, "LIST" )) {
       listing = list_statements;
       list_skip_one = 1;
+   } else if ( !strcmp( id, "CPU" )) {
+      directive_cpu( p );
    } else {
       error( ERR_NO_DIRECTIVE );
    }
@@ -1737,7 +1771,7 @@ static int directive( char **p ) {
 
 static int is_mnemonic( const char *id ) {
    char id_uppercase[ID_LEN];
-   int l = 0, r = sizeof( instruction_tbl ) / sizeof( instruction_desc ), x;
+   int l = 0, r = instruction_tbl_size, x;
    int cmp;
    strcpy( id_uppercase, id );
    to_uppercase( id_uppercase );
@@ -1770,11 +1804,11 @@ static int statement( char **p ) {
    /* first check for variable or label definition */
    if ( **p == LOCAL_LABEL_LETTER ) {
       ( *p )++;
-      numbered_ident( p, id1 );
+      ident( p, id1, 1, 0 );
       skip_white( p );
       label = LOCAL_LABEL;
    } else if ( isalpha( **p )) {
-      ident( p, id1 );
+      ident( p, id1, 0, 0 );
       skip_white( p );
       label = GLOBAL_LABEL;
    }
@@ -2011,7 +2045,7 @@ static int conditional_statement( char **p ) {
    if ( IS_END( **p )) return 0;
    if ( **p != DIRECTIVE_LETTER ) return 0;
    ( *p )++;
-   ident_uppercase( p, id );
+   ident( p, id, 0, 1 );
 
    if ( !strcmp( id, "IF" )) {
       directive_if( p, 1, 0 );
@@ -2245,6 +2279,8 @@ int main( int argc, char *argv[] ) {
       goto ret0;
    }
 
+   select_6502();
+
    /* first assembler pass */
    pass = 1;
    source = current_file->text;
diff --git a/asm6502.h b/asm6502.h
index a4dd412..e123b2c 100644
--- a/asm6502.h
+++ b/asm6502.h
@@ -36,38 +36,47 @@ typedef unsigned short u16;
 
 /* addressing modes */
 enum {
-   AM_ACC = 0,
-   AM_IMP = 1,
-   AM_IMM = 2,
-   AM_REL = 3,
-   AM_ZP  = 4,
-   AM_ZPX = 5,
-   AM_ZPY = 6,
-   AM_ABS = 7,
-   AM_ABX = 8,
-   AM_ABY = 9,
-   AM_IND = 10,
-   AM_INX = 11,
-   AM_INY = 12,
-   AM_INV = 13
+   AM_ACC = 0,  /*         accumulator                       */
+   AM_IMP = 1,  /*         implied                           */
+   AM_IMM = 2,  /* #       immediate addressing              */
+   AM_REL = 3,  /* R       program counter relative          */
+   AM_ZP  = 4,  /* ZP      zero-page                         */
+   AM_ZPX = 5,  /* ZP,X    zero-page indexed with X          */
+   AM_ZPY = 6,  /* ZP,Y    zero-page indexed with Y          */
+   AM_ABS = 7,  /* A       absolute                          */
+   AM_ABX = 8,  /* A,X     absolute indexed with X           */
+   AM_ABY = 9,  /* A,Y     absolute indexed with Y           */
+   AM_AIN = 10, /* (A)     absolute indirect                 */
+   AM_ZIX = 11, /* (ZP,X)  zero-page indexed indirect        */
+   AM_ZIY = 12, /* (ZP),Y  zero-page indirect indexed with Y */
+   AM_ZIN = 13, /* (ZP)    zero-page indirect                */
+   AM_AIX = 14, /* (ABS,X) absolute indexed indirect         */
+   AM_ZPR = 15, /* ZP,R    zero-page, relative               */
+   AM_INV = 16
 };
 
 enum {
-   INV = 0xff
+   INV = 0xfc
 };
 
 typedef struct instruction_desc {
-   char mn[4];
-   u8 op[13];
+   char mn[5];
+   u8 op[16];
 } instruction_desc;
 
-extern instruction_desc instruction_tbl[56];
-extern const unsigned itbl_size;
 
-extern u16 am_size[13];
+extern instruction_desc *instruction_tbl;
+extern instruction_desc itbl_6502[56];
+extern instruction_desc itbl_65c02[98];
+
+extern int instruction_tbl_size;
+
+extern u16 am_size[16];
 
 #define AM_VALID( instr, am ) ((instr).op[am] != INV)
-
 #define MAXINT( a, b ) (((b) >= (a)) ? (b) : (a))
 
+void select_6502(void);
+void select_65c02(void);
+
 #endif
diff --git a/itbl.c b/itbl.c
index 32885e7..d36282f 100644
--- a/itbl.c
+++ b/itbl.c
@@ -30,65 +30,181 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "asm6502.h"
 
-u16 am_size[13] = { 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 2, 2 };
+u16 am_size[16] = { 1, 1, 2, 2, 2, 2, 2, 3, 3, 3, 3, 2, 2, 2, 3, 3 };
 
-const unsigned itbl_size = 56;
 
-instruction_desc instruction_tbl[56] = {
-   { "ADC", { INV,  INV, 0x69, INV, 0x65, 0x75, INV, 0x6d, 0x7d, 0x79, INV, 0x61, 0x71 }},
-   { "AND", { INV,  INV, 0x29, INV, 0x25, 0x35, INV, 0x2d, 0x3d, 0x39, INV, 0x21, 0x31 }},
-   { "ASL", { 0x0a, INV, INV,  INV, 0x06, 0x16, INV, 0x0e, 0x1e, INV,  INV, INV, INV }},
-   { "BCC", { INV,  INV, INV, 0x90, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "BCS", { INV,  INV, INV, 0xb0, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "BEQ", { INV,  INV, INV, 0xf0, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "BIT", { INV,  INV, INV,  INV, 0x24, INV,  INV, 0x2c, INV,  INV,  INV, INV, INV }},
-   { "BMI", { INV,  INV, INV, 0x30, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "BNE", { INV,  INV, INV, 0xd0, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "BPL", { INV,  INV, INV, 0x10, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "BRK", { INV, 0x00, INV,  INV, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "BVC", { INV,  INV, INV, 0x50, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "BVS", { INV,  INV, INV, 0x70, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "CLC", { INV, 0x18, INV,  INV, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "CLD", { INV, 0xd8, INV,  INV, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "CLI", { INV, 0x58, INV,  INV, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "CLV", { INV, 0xb8, INV,  INV, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "CMP", { INV,  INV, 0xc9, INV, 0xc5, 0xd5, INV, 0xcd, 0xdd, 0xd9, INV, 0xc1, 0xd1 }},
-   { "CPX", { INV,  INV, 0xe0, INV, 0xe4, INV,  INV, 0xec, INV,  INV,  INV, INV, INV }},
-   { "CPY", { INV,  INV, 0xc0, INV, 0xc4, INV,  INV, 0xcc, INV,  INV,  INV, INV, INV }},
-   { "DEC", { INV,  INV, INV,  INV, 0xc6, 0xd6, INV, 0xce, 0xde, INV,  INV, INV, INV }},
-   { "DEX", { INV, 0xca, INV,  INV, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "DEY", { INV, 0x88, INV,  INV, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "EOR", { INV,  INV, 0x49, INV, 0x45, 0x55, INV, 0x4d, 0x5d, 0x59, INV, 0x41, 0x51 }},
-   { "INC", { INV,  INV, INV,  INV, 0xe6, 0xf6, INV, 0xee, 0xfe, INV,  INV, INV, INV }},
-   { "INX", { INV, 0xe8, INV,  INV, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "INY", { INV, 0xc8, INV,  INV, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "JMP", { INV,  INV, INV,  INV, INV,  INV,  INV, 0x4c, INV,  INV, 0x6c, INV, INV }},
-   { "JSR", { INV,  INV, INV,  INV, INV,  INV,  INV, 0x20, INV,  INV,  INV, INV, INV }},
-   { "LDA", { INV,  INV, 0xa9, INV, 0xa5, 0xb5, INV, 0xad, 0xbd, 0xb9, INV, 0xa1, 0xb1 }},
-   { "LDX", { INV,  INV, 0xa2, INV, 0xa6, INV, 0xb6, 0xae, INV,  0xbe, INV, INV, INV }},
-   { "LDY", { INV,  INV, 0xa0, INV, 0xa4, 0xb4, INV, 0xac, 0xbc, INV,  INV, INV, INV }},
-   { "LSR", { 0x4a, INV, INV,  INV, 0x46, 0x56, INV, 0x4e, 0x5e, INV,  INV, INV, INV }},
-   { "NOP", { INV, 0xea, INV,  INV, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "ORA", { INV,  INV, 0x09, INV, 0x05, 0x15, INV, 0x0d, 0x1d, 0x19, INV, 0x01, 0x11 }},
-   { "PHA", { INV, 0x48, INV,  INV, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "PHP", { INV, 0x08, INV,  INV, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "PLA", { INV, 0x68, INV,  INV, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "PLP", { INV, 0x28, INV,  INV, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "ROL", { 0x2a, INV, INV,  INV, 0x26, 0x36, INV, 0x2e, 0x3e, INV,  INV, INV, INV }},
-   { "ROR", { 0x6a, INV, INV,  INV, 0x66, 0x76, INV, 0x6e, 0x7e, INV,  INV, INV, INV }},
-   { "RTI", { INV, 0x40, INV,  INV, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "RTS", { INV, 0x60, INV,  INV, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "SBC", { INV,  INV, 0xe9, INV, 0xe5, 0xf5, INV, 0xed, 0xfd, 0xf9, INV, 0xe1, 0xf1 }},
-   { "SEC", { INV, 0x38, INV,  INV, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "SED", { INV, 0xf8, INV,  INV, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "SEI", { INV, 0x78, INV,  INV, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "STA", { INV,  INV, INV,  INV, 0x85, 0x95, INV, 0x8d, 0x9d, 0x99, INV, 0x81, 0x91 }},
-   { "STX", { INV,  INV, INV,  INV, 0x86, INV, 0x96, 0x8e, INV,  INV,  INV, INV, INV }},
-   { "STY", { INV,  INV, INV,  INV, 0x84, 0x94, INV, 0x8c, INV,  INV,  INV, INV, INV }},
-   { "TAX", { INV, 0xaa, INV,  INV, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "TAY", { INV, 0xa8, INV,  INV, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "TSX", { INV, 0xba, INV,  INV, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "TXA", { INV, 0x8a, INV,  INV, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "TXS", { INV, 0x9a, INV,  INV, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }},
-   { "TYA", { INV, 0x98, INV,  INV, INV,  INV,  INV, INV,  INV,  INV,  INV, INV, INV }}
+instruction_desc *instruction_tbl;
+int instruction_tbl_size;
+
+
+void select_6502( void ) {
+   instruction_tbl = itbl_6502;
+   instruction_tbl_size = sizeof( itbl_6502 ) / sizeof( instruction_desc );
+}
+
+
+void select_65c02( void ) {
+   instruction_tbl = itbl_65c02;
+   instruction_tbl_size = sizeof( itbl_65c02 ) / sizeof( instruction_desc );
+}
+
+
+instruction_desc itbl_6502[56] = {
+   { "ADC", { INV,  INV,  0x69, INV,  0x65, 0x75, INV,  0x6d, 0x7d, 0x79, INV,  0x61, 0x71, INV, INV, INV }},
+   { "AND", { INV,  INV,  0x29, INV,  0x25, 0x35, INV,  0x2d, 0x3d, 0x39, INV,  0x21, 0x31, INV, INV, INV }},
+   { "ASL", { 0x0a, INV,  INV,  INV,  0x06, 0x16, INV,  0x0e, 0x1e, INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "BCC", { INV,  INV,  INV,  0x90, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "BCS", { INV,  INV,  INV,  0xb0, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "BEQ", { INV,  INV,  INV,  0xf0, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "BIT", { INV,  INV,  INV,  INV,  0x24, INV,  INV,  0x2c, INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "BMI", { INV,  INV,  INV,  0x30, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "BNE", { INV,  INV,  INV,  0xd0, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "BPL", { INV,  INV,  INV,  0x10, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "BRK", { INV,  0x00, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "BVC", { INV,  INV,  INV,  0x50, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "BVS", { INV,  INV,  INV,  0x70, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "CLC", { INV,  0x18, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "CLD", { INV,  0xd8, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "CLI", { INV,  0x58, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "CLV", { INV,  0xb8, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "CMP", { INV,  INV,  0xc9, INV,  0xc5, 0xd5, INV,  0xcd, 0xdd, 0xd9, INV,  0xc1, 0xd1, INV, INV, INV }},
+   { "CPX", { INV,  INV,  0xe0, INV,  0xe4, INV,  INV,  0xec, INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "CPY", { INV,  INV,  0xc0, INV,  0xc4, INV,  INV,  0xcc, INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "DEC", { INV,  INV,  INV,  INV,  0xc6, 0xd6, INV,  0xce, 0xde, INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "DEX", { INV,  0xca, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "DEY", { INV,  0x88, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "EOR", { INV,  INV,  0x49, INV,  0x45, 0x55, INV,  0x4d, 0x5d, 0x59, INV,  0x41, 0x51, INV, INV, INV }},
+   { "INC", { INV,  INV,  INV,  INV,  0xe6, 0xf6, INV,  0xee, 0xfe, INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "INX", { INV,  0xe8, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "INY", { INV,  0xc8, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "JMP", { INV,  INV,  INV,  INV,  INV,  INV,  INV,  0x4c, INV,  INV,  0x6c, INV,  INV,  INV, INV, INV }},
+   { "JSR", { INV,  INV,  INV,  INV,  INV,  INV,  INV,  0x20, INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "LDA", { INV,  INV,  0xa9, INV,  0xa5, 0xb5, INV,  0xad, 0xbd, 0xb9, INV,  0xa1, 0xb1, INV, INV, INV }},
+   { "LDX", { INV,  INV,  0xa2, INV,  0xa6, INV,  0xb6, 0xae, INV,  0xbe, INV,  INV,  INV,  INV, INV, INV }},
+   { "LDY", { INV,  INV,  0xa0, INV,  0xa4, 0xb4, INV,  0xac, 0xbc, INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "LSR", { 0x4a, INV,  INV,  INV,  0x46, 0x56, INV,  0x4e, 0x5e, INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "NOP", { INV,  0xea, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "ORA", { INV,  INV,  0x09, INV,  0x05, 0x15, INV,  0x0d, 0x1d, 0x19, INV,  0x01, 0x11, INV, INV, INV }},
+   { "PHA", { INV,  0x48, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "PHP", { INV,  0x08, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "PLA", { INV,  0x68, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "PLP", { INV,  0x28, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "ROL", { 0x2a, INV,  INV,  INV,  0x26, 0x36, INV,  0x2e, 0x3e, INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "ROR", { 0x6a, INV,  INV,  INV,  0x66, 0x76, INV,  0x6e, 0x7e, INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "RTI", { INV,  0x40, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "RTS", { INV,  0x60, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "SBC", { INV,  INV,  0xe9, INV,  0xe5, 0xf5, INV,  0xed, 0xfd, 0xf9, INV,  0xe1, 0xf1, INV, INV, INV }},
+   { "SEC", { INV,  0x38, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "SED", { INV,  0xf8, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "SEI", { INV,  0x78, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "STA", { INV,  INV,  INV,  INV,  0x85, 0x95, INV,  0x8d, 0x9d, 0x99, INV,  0x81, 0x91, INV, INV, INV }},
+   { "STX", { INV,  INV,  INV,  INV,  0x86, INV,  0x96, 0x8e, INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "STY", { INV,  INV,  INV,  INV,  0x84, 0x94, INV,  0x8c, INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "TAX", { INV,  0xaa, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "TAY", { INV,  0xa8, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "TSX", { INV,  0xba, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "TXA", { INV,  0x8a, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "TXS", { INV,  0x9a, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }},
+   { "TYA", { INV,  0x98, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV, INV, INV }}
+};
+
+instruction_desc itbl_65c02[98] = {
+   { "ADC",  { INV,  INV,  0x69, INV,  0x65, 0x75, INV,  0x6d, 0x7d, 0x79, INV,  0x61, 0x71, 0x72, INV,  INV }},
+   { "AND",  { INV,  INV,  0x29, INV,  0x25, 0x35, INV,  0x2d, 0x3d, 0x39, INV,  0x21, 0x31, 0x32, INV,  INV }},
+   { "ASL",  { 0x0a, INV,  INV,  INV,  0x06, 0x16, INV,  0x0e, 0x1e, INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "BBR0", { INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  0x0f }},
+   { "BBR1", { INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  0x1f }},
+   { "BBR2", { INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  0x2f }},
+   { "BBR3", { INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  0x3f }},
+   { "BBR4", { INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  0x4f }},
+   { "BBR5", { INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  0x5f }},
+   { "BBR6", { INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  0x6f }},
+   { "BBR7", { INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  0x7f }},
+   { "BBS0", { INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  0x8f }},
+   { "BBS1", { INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  0x9f }},
+   { "BBS2", { INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  0xaf }},
+   { "BBS3", { INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  0xbf }},
+   { "BBS4", { INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  0xcf }},
+   { "BBS5", { INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  0xdf }},
+   { "BBS6", { INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  0xef }},
+   { "BBS7", { INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  0xff }},
+   { "BCC",  { INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "BCS",  { INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "BEQ",  { INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "BIT",  { INV,  INV,  0x89, INV,  0x24, 0x34, INV,  0x2c, 0x3c, INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "BMI",  { INV,  INV,  INV,  0x30, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "BNE",  { INV,  INV,  INV,  0xd0, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "BPL",  { INV,  INV,  INV,  0x10, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "BRA",  { INV,  INV,  INV,  0x80, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "BRK",  { INV,  0x00, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "BVC",  { INV,  INV,  INV,  0x50, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "BVS",  { INV,  INV,  INV,  0x70, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "CLC",  { INV,  0x18, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "CLD",  { INV,  0xd8, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "CLI",  { INV,  0x58, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "CLV",  { INV,  0xb8, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "CMP",  { INV,  INV,  0xc9, INV,  0xc5, 0xd5, INV,  0xcd, 0xdd, 0xd9, INV,  0xc1, 0xd1, 0xd2, INV,  INV }},
+   { "CPX",  { INV,  INV,  0xe0, INV,  0xe4, INV,  INV,  0xec, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "CPY",  { INV,  INV,  0xc0, INV,  0xc4, INV,  INV,  0xcc, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "DEC",  { 0x3a, INV,  INV,  INV,  0xc6, 0xd6, INV,  0xce, 0xde, INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "DEX",  { INV,  0xca, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "DEY",  { INV,  0x88, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "EOR",  { INV,  INV,  0x49, INV,  0x45, 0x55, INV,  0x4d, 0x5d, 0x59, INV,  0x41, 0x51, 0x52, INV,  INV }},
+   { "INC",  { 0xee, INV,  INV,  INV,  0xe6, 0xf6, INV,  0xee, 0xfe, INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "INX",  { INV,  0xe8, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "INY",  { INV,  0xc8, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "JMP",  { INV,  INV,  INV,  INV,  INV,  INV,  INV,  0x4c, INV,  INV,  0x6c, INV,  INV,  INV,  0x7c, INV }},
+   { "JSR",  { INV,  INV,  INV,  INV,  INV,  INV,  INV,  0x20, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "LDA",  { INV,  INV,  0xa9, INV,  0xa5, 0xb5, INV,  0xad, 0xbd, 0xb9, INV,  0xa1, 0xb1, 0xb2, INV,  INV }},
+   { "LDX",  { INV,  INV,  0xa2, INV,  0xa6, INV,  0xb6, 0xae, INV,  0xbe, INV,  INV,  INV,  INV,  INV,  INV }},
+   { "LDY",  { INV,  INV,  0xa0, INV,  0xa4, 0xb4, INV,  0xac, 0xbc, INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "LSR",  { 0x4a, INV,  INV,  INV,  0x46, 0x56, INV,  0x4e, 0x5e, INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "NOP",  { INV,  0xea, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "ORA",  { INV,  INV,  0x09, INV,  0x05, 0x15, INV,  0x0d, 0x1d, 0x19, INV,  0x01, 0x11, 0x12, INV,  INV }},
+   { "PHA",  { INV,  0x48, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "PHP",  { INV,  0x08, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "PHX",  { INV,  0xda, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "PHY",  { INV,  0x5a, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "PLA",  { INV,  0x68, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "PLP",  { INV,  0x28, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "PLX",  { INV,  0xfa, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "PLY",  { INV,  0x7a, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "RMB0", { INV,  INV,  INV,  INV,  0x07,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "RMB1", { INV,  INV,  INV,  INV,  0x17,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "RMB2", { INV,  INV,  INV,  INV,  0x27,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "RMB3", { INV,  INV,  INV,  INV,  0x37,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "RMB4", { INV,  INV,  INV,  INV,  0x47,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "RMB5", { INV,  INV,  INV,  INV,  0x57,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "RMB6", { INV,  INV,  INV,  INV,  0x67,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "RMB7", { INV,  INV,  INV,  INV,  0x77,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "ROL",  { 0x2a, INV,  INV,  INV,  0x26, 0x36, INV,  0x2e, 0x3e, INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "ROR",  { 0x6a, INV,  INV,  INV,  0x66, 0x76, INV,  0x6e, 0x7e, INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "RTI",  { INV,  0x40, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "RTS",  { INV,  0x60, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "SBC",  { INV,  INV,  0xe9, INV,  0xe5, 0xf5, INV,  0xed, 0xfd, 0xf9, INV,  0xe1, 0xf1, 0xf2, INV,  INV }},
+   { "SEC",  { INV,  0x38, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "SED",  { INV,  0xf8, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "SEI",  { INV,  0x78, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "SMB0", { INV,  INV,  INV,  INV,  0x87,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "SMB1", { INV,  INV,  INV,  INV,  0x97,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "SMB2", { INV,  INV,  INV,  INV,  0xa7,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "SMB3", { INV,  INV,  INV,  INV,  0xb7,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "SMB4", { INV,  INV,  INV,  INV,  0xc7,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "SMB5", { INV,  INV,  INV,  INV,  0xd7,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "SMB6", { INV,  INV,  INV,  INV,  0xe7,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "SMB7", { INV,  INV,  INV,  INV,  0xf7,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "STA",  { INV,  INV,  INV,  INV,  0x85, 0x95, INV,  0x8d, 0x9d, 0x99, INV,  0x81, 0x91, 0x92, INV,  INV }},
+   { "STP",  { INV,  0xdb, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "STX",  { INV,  INV,  INV,  INV,  0x86, INV,  0x96, 0x8e, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "STY",  { INV,  INV,  INV,  INV,  0x84, 0x94, INV,  0x8c, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "STZ",  { INV,  INV,  INV,  INV,  0x64, 0x74, INV,  0x9c, 0x9e, INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "TAX",  { INV,  0xaa, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "TAY",  { INV,  0xa8, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "TRB",  { INV,  INV,  INV,  INV,  0x14, INV,  INV,  0x1c, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "TSB",  { INV,  INV,  INV,  INV,  0x04, INV,  INV,  0x0c, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "TSX",  { INV,  0xba, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "TXA",  { INV,  0x8a, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "TXS",  { INV,  0x9a, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "TYA",  { INV,  0x98, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }},
+   { "WAI",  { INV,  0xcb, INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV,  INV }}
 };
diff --git a/tests/wdc65c02.a65 b/tests/wdc65c02.a65
new file mode 100644
index 0000000..4ff0235
--- /dev/null
+++ b/tests/wdc65c02.a65
@@ -0,0 +1,85 @@
+; additional instructions provided by the WDC65C02
+; for the other instructions see MOS6502.A65
+
+.cpu 65c02
+
+adc ($11)
+and ($11)
+
+bbr0 $47,@
+bbr1 $47,@
+bbr2 $47,@
+bbr3 $47,@
+bbr4 $47,@
+bbr5 $47,@
+bbr6 $47,@
+bbr7 $47,@
+
+bbs0 $47,@
+bbs1 $47,@
+bbs2 $47,@
+bbs3 $47,@
+bbs4 $47,@
+bbs5 $47,@
+bbs6 $47,@
+bbs7 $47,@
+
+bit $11,x
+bit $4711,x
+bit #42
+
+bra @
+
+cmp ($11)
+
+dec
+
+eor ($11)
+
+jmp ($4711, X)
+
+lda ($11)
+
+ora ($11)
+
+phx
+phy
+plx
+ply
+
+rmb0 $47
+rmb1 $47
+rmb2 $47
+rmb3 $47
+rmb4 $47
+rmb5 $47
+rmb6 $47
+rmb7 $47
+
+sbc ($11)
+
+smb0 $47
+smb1 $47
+smb2 $47
+smb3 $47
+smb4 $47
+smb5 $47
+smb6 $47
+smb7 $47
+
+sta ($11)
+
+stp
+
+stz $11
+stz $11,x
+stz $4711
+stz $4711,x
+
+trb $11
+trb $4711
+
+tsb $11
+tsb $4711
+
+wai