/*
 * Copyright (c) 2011, Preston Skupinski <skupinsk@cse.msu.edu>
 * 
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

function run_tests() {
  test_lda();
  test_rep();
  test_sep();
  test_branching();
  test_adc();
  test_sbc();
  test_cmp();
  test_subroutines();
  test_mvn_and_mvp();
  test_emulation_mode();
}

function test_lda() {
  module("LDA");
  test("Make sure LDA with a constant properly loads an 8-bit value in "+
       "8-bit memory/accumulator mode.", function() {
    var cpu = new CPU_65816();
    cpu.execute("18fba9ff");
    equals(cpu.r.a, 0xff, "The accumulator should be 0xff when 0xff is "+
                          "given as its argument in 8-bit "+
                          "memory/accumulator mode.");
    equals(cpu.p.m, 1,    "m flag of the p status register should be 1 for "+
                          "8-bit memory/accumulator mode.");
    equals(cpu.p.e, 0,    "Hidden e flag of the p status register should be "+
                          "0 for native mode");
  });
  test("Make sure LDA with a constant properly loads a 16-bit value in "+
       "16-bit memory/accumulator mode.", function() {
    var cpu = new CPU_65816();
    cpu.execute("18fbc220a9ffff");
    equals(cpu.r.a, 0xffff, "The accumulator should be 0xffff when 0xffff is "+
                            "given as its argument in 16-bit "+
                            "memory/accumulator mode.");
    equals(cpu.p.m, 0,    "m flag of the p status register should be 0 for "+
                          "16-bit memory/accumulator mode.");
    equals(cpu.p.e, 0,    "Hidden e flag of the p status register should be "+
                          "0 for native mode");

  });
  test("Make sure LDA with a direct page address loads an 8-bit value in "+
       "8-bit memory/accumulator mode.", function() {
    var cpu = new CPU_65816();
    cpu.execute("18fba90185fea5fe"); 
    equals(cpu.r.a, 1, "The accumulator should be 1 when 1 is "+
                       "loaded from $fe(direct page) in 8-bit "+
                       "memory/accumulator mode.");
    equals(cpu.p.m, 1, "m flag of the p status register should be 1 for "+
                       "8-bit memory/accumulator mode.");
    equals(cpu.p.e, 0, "Hidden e flag of the p status register should be 0 "+
                       "for native mode");
  });
  test("Make sure LDA with a direct page address loads a 16-bit value in "+
       "16-bit memory/accumulator mode.", function() {
    var cpu = new CPU_65816();
    cpu.execute("18fbc220a901ff85fea5fe");
    equals(cpu.r.a, 0xff01, "The accumulator should be 0xff01 when 0xff01 "+
                            "is loaded from $fe(direct page) in 16-bit "+
                            "memory/accumulator mode.");
    equals(cpu.p.m, 0, "m flag of the p status register should be 0 for "+
                       "16-bit memory/accumulator mode.");
    equals(cpu.p.e, 0, "Hidden e flag of the p status register should be 0 "+
                       "for native mode"); 
  });
}

function test_emulation_mode() {
  module("Emulation Mode");
  test("Make sure pulling from the stack when the stack register is at 0x1ff"+
       "causes the stack register to pull from 0x100.", function() {
    var cpu = new CPU_65816();
    cpu.execute("a9fe8d0001a90068");
    equals(cpu.r.s, 0, "The stack register should be 0 after the pull "+
                       "operation.");
    equals(cpu.r.a, 0xfe,  "The accumulator should be 0xfe after the pull "+
                           "operation."); 
  });
}

function test_mvn_and_mvp() {
  module("MVN and MVP");
  test("Test a short example program for MVP", function() {
    var cpu = new CPU_65816();
    cpu.execute("18fbe230a9ab8dff0fa9cd8d0010c230a90100a20010a00020440000");
    equals(cpu.r.a, 0xffff, "After executing the example program the "+
                            "accumulator should've underflowed and "+
                            "resulted in 0xffff.");
    equals(cpu.r.x, 0x0ffe, "After executing the example program the x "+
                            "register should be 0x0ffe.");
    equals(cpu.r.y, 0x1ffe, "After executing the example program the y "+
                            "register should be 0x1ffe.");  
    var byte_one = cpu.mmu.read_byte(0x1fff);
    var byte_two = cpu.mmu.read_byte(0x2000);
    equals(byte_one, 0xab,  "After executing the example program 0x001fff "+
                            "in memory should contain 0xab.");
    equals(byte_two, 0xcd,  "After executing the example program 0x002000 "+
                            "in memory should contain 0xcd.");
  });
}

function test_subroutines() {
  module("Subroutines");
  test("Short program to check that JSR and RTS work", function() {
    var cpu = new CPU_65816();
    // It jumps to 0xffff so it doesn't execute the subroutine again and 
    // effectively halts the program.
    cpu.execute("18fbc23018a9ffff200e804cffff3a60");
    equals(cpu.r.a, 0xfffe, "The subroutine should execute exactly once, "+
                            "decrementing 0xffff to 0xfffe."); 
  });
}

function test_cmp() {
  module("CMP");
  test("Compare two 8-bit numbers, 0x01 and 0xff", function() {
    var cpu = new CPU_65816();
    cpu.execute("18fbe23018a901c9ff");
    equals(cpu.r.a, 0x01, "CMP should not change the value of the "+
                          "accumulator");
    equals(cpu.p.z, 0, "When comparing 0x01 and 0xff the zero(z) bit "+
                       "should not be set (0x01 != 0xff)");   
    equals(cpu.p.n, 0, "When comparing 0x01 and 0xff the negative(n) bit "+
                       "should not be set"); 
    equals(cpu.p.c, 0, "When comparing 0x01 and 0xff the carry(c) bit "+
                       "should not be set (0x01 < 0xff)");
  });
  test("Compare two 16-bit numbers, 0xff01 and 0xfeff", function() {
    var cpu = new CPU_65816();
    cpu.execute("18fbc23018a901ffc9fffe");
    equals(cpu.r.a, 0xff01, "CMP should not change the value of the "+
                            "accumulator");
    equals(cpu.p.n, 0, "When comparing 0xff01 and 0xfeff the negative(n) "+
                       "bit should not be set");
    equals(cpu.p.z, 0, "When comparing 0xff01 and 0xfeff the zero(z) bit "+
                       "should not be set (0xff01 != 0xfeff)");
    equals(cpu.p.c, 1, "When comparing 0xff01 and 0xfeff the carry(c) bit "+
                       "should be set (0xff01 >= 0xfeff)"); 
  });
}

function test_sbc() {
  module("SBC");
  test("Test normal subtraction of two 8-bit numbers that don't cause a "+
       "borrow.", function() {
    var cpu = new CPU_65816();
    cpu.execute("18fbe23018a901e901");
    equals(cpu.r.a, 0, "0x01 - 0x01 should result in zero when using "+
                       "SBC");
    equals(cpu.p.z, 1, "0x01 - 0x01 should set the zero(z) bit when "+
                       "using SBC");
    equals(cpu.p.n, 0, "0x01 - 0x01 should not set the negative(n) bit "+
                       "when using SBC");
    equals(cpu.p.v, 0, "0x01 - 0x01 should not set the overflow(v) bit "+
                       "when using SBC");
    equals(cpu.p.c, 1, "0x01 - 0x01 should set the carry(c) bit when using "+
                       "SBC");
  });

  test("Test normal subtraction of two 16-bit numbers that don't cause a "+
       "borrow.", function() {
    var cpu = new CPU_65816();
    cpu.execute("18fbc23018a90100e90100");
    equals(cpu.r.a, 0, "0x0001 - 0x0001 should result in zero when using "+
                       "SBC");
    equals(cpu.p.z, 1, "0x0001 - 0x0001 should set the zero(z) bit when "+
                       "using SBC");
    equals(cpu.p.n, 0, "0x0001 - 0x0001 should not set the negative(n) bit "+
                       "when using SBC");
    equals(cpu.p.v, 0, "0x0001 - 0x0001 should not set the overflow(v) bit "+
                       "when using SBC");
    equals(cpu.p.c, 1, "0x0001 - 0x0001 should set the carry(c) bit when "+
                       "using SBC");
  });
  test("Test subtraction that triggers a borrow with 8-bit numbers", 
       function() {
    var cpu = new CPU_65816();
    cpu.execute("18fbe23018a9d0e9ef");
    equals(cpu.r.a, 0xe1, "0xd0 - 0xef should set the accumulator to 0xe1 "+
                          "when using SBC");
    equals(cpu.p.n, 1,    "0xd0 - 0xef should set the negative(n) bit when "+ 
                          "using SBC");
    equals(cpu.p.v, 0,    "0xd0 - 0xef should not set the overflow(v) bit "+
                          "when using SBC");
    equals(cpu.p.z, 0,    "0xd0 - 0xef should not set the zero(z) bit when "+
                          "using SBC");
    equals(cpu.p.c, 0,    "0xd0 - 0xef should not set the carry(c) bit when "+
                          "using SBC");  
  });
  test("Test subtraction that triggers a borrow with 16-bit numbers", 
       function() {
    var cpu = new CPU_65816();
    cpu.execute("18fbc23018a900d0e900ef");
    equals(cpu.r.a, 0xe100, "0xd000 - 0xef00 should set the accumulator to "+
                            "0xe0ff when using SBC");
    equals(cpu.p.n, 1, "0xd000 - 0xef00 should set the negative(n) bit when "+ 
                       "using SBC");
    equals(cpu.p.v, 0, "0xd000 - 0xef00 should not set the overflow(v) bit "+
                       "when using SBC");
    equals(cpu.p.z, 0, "0xd000 - 0xef00 should not set the zero(z) bit when "+
                       "using SBC");
    equals(cpu.p.c, 0, "0xd000 - 0xef00 should not set the carry(c) bit when "+
                       "using SBC");  
  });
}

function test_adc() {
  module("ADC");
  test("Test normal addition of two 16-bit numbers that don't cause an "+
       "overflow (m bit is 0)", function() {
     var cpu = new CPU_65816();
     cpu.execute("18fb18c230a90100690100");
     equals(cpu.r.a, 2, "0x0001 + 0x0001 should result in 0x0002 when using "+
                        "ADC");
     equals(cpu.p.n, 0, "0x0001 + 0x0001 does not result in a negative "+
                        "two's complement number when adding with ADC."); 
     equals(cpu.p.c, 0, "0x0001 + 0x0001 should not set the carry(c) bit when "+
                        "adding with ADC");
     equals(cpu.p.z, 0, "0x0001 + 0x0001 should not set the zero(z) bit when "+
                        "adding with ADC");
     equals(cpu.p.v, 0, "0x0001 + 0x0001 should not set the overflow(v) bit "+
                        "when adding with ADC");
   });
   test("Test normal addition of two 8-bit numbers that don't cause an "+
       "overflow (m bit is 1)", function() {
     var cpu = new CPU_65816();
     cpu.execute("18fb18e230a9016901");
     equals(cpu.r.a, 2, "0x01 + 0x01 should result in 0x02 when using "+
                        "ADC");
     equals(cpu.p.n, 0, "0x01 + 0x01 does not result in a negative "+
                        "two's complement number when adding with ADC."); 
     equals(cpu.p.c, 0, "0x01 + 0x01 should not set the carry(c) bit when "+
                        "adding with ADC");
     equals(cpu.p.z, 0, "0x01 + 0x01 should not set the zero(z) bit when "+
                        "adding with ADC");
     equals(cpu.p.v, 0, "0x01 + 0x01 should not set the overflow(v) bit "+
                        "when adding with ADC");
   });
  
  test("Test that overflow sets the carry flag and works in general with two"+
       "16-bit numbers (m bit is 0)", function() {
    var cpu = new CPU_65816();
    cpu.execute("18fb18c230a9ffff690100");
    equals(cpu.p.c, 1, "0xffff + 0x0001 should set the carry bit when using "+
                       "ADC");
    equals(cpu.r.a, 0, "0xffff + 0x0001 should result in the accumulator "+
                       "being 0 when using ADC");
    equals(cpu.p.n, 0, "0xffff + 0x0001 should not set the negative(n) bit "+
                       "when using ADC");
    equals(cpu.p.z, 1, "0xffff + 0x0001 should set the zero(z) bit when using "+
                       "ADC");
    equals(cpu.p.v, 0, "0xffff + 0x0001 should not set the overflow(v) bit "+
                       "when using ADC");
  });

  test("Test that overflow sets the carry flag and works in general with two"+
       "8-bit numbers (m bit is 1)", function() {
    var cpu = new CPU_65816();
    cpu.execute("18fb18e230a9ff6901");
    equals(cpu.p.c, 1, "0xff + 0x01 should set the carry bit when using "+
                       "ADC");
    equals(cpu.r.a, 0, "0xff + 0x01 should result in the accumulator "+
                       "being 0 when using ADC");
    equals(cpu.p.n, 0, "0xff + 0x01 should not set the negative(n) bit when "+
                       "using ADC");
    equals(cpu.p.z, 1, "0xff + 0x01 should set the zero(z) bit when using "+
                       "ADC");
    equals(cpu.p.v, 0, "0xff + 0x01 should not set the overflow(v) bit when "+
                       "using ADC");
  });

  test("Test signed overflow with two 8-bit numbers (m bit is 1)", function() {
    var cpu = new CPU_65816();
    cpu.execute("18fb18e230a97f6901");
    equals(cpu.r.a, 0x80, "0x7f + 0x01 should result in 0x80 when "+
                            "using ADC");
    equals(cpu.p.v, 1, "0x7f + 0x01 should set the overflow(v) bit when "+
                       "using ADC");
    equals(cpu.p.c, 0, "0x7f + 0x01 should not set the carry(c) bit when "+
                       "using ADC");
    equals(cpu.p.z, 0, "0x7f + 0x01 should not set the zero(z) bit when "+
                       "using ADC");
    equals(cpu.p.n, 1, "0x7f + 0x01 should set the negative(n) bit when "+
                       "using ADC");   
  });
  test("Test signed overflow with two 16-bit numbers (m bit is 0)", function() {
    var cpu = new CPU_65816();
    cpu.execute("18fb18c230a9ff7f690100");
    equals(cpu.r.a, 0x8000, "0x7fff + 0x0001 should result in 0x8000 when "+
                            "using ADC");
    equals(cpu.p.v, 1, "0x7fff + 0x0001 should set the overflow(v) bit when "+
                       "using ADC");
    equals(cpu.p.c, 0, "0x7fff + 0x0001 should not set the carry(c) bit when "+
                       "using ADC");
    equals(cpu.p.z, 0, "0x7fff + 0x0001 should not set the zero(z) bit when "+
                       "using ADC");
    equals(cpu.p.n, 1, "0x7fff + 0x0001 should set the negative(n) bit when "+
                       "using ADC");   
  });

  test("Test ADC direct page with 8-bit numbers (m bit is 1)", function() {
    var cpu = new CPU_65816();
    cpu.execute("18fb18e230a90185ffa97f65ff");
    equals(cpu.r.a, 0x80, "0x7f + 0x01 should result in 0x80 when "+
                            "using ADC");
    equals(cpu.p.v, 1, "0x7f + 0x01 should set the overflow(v) bit when "+
                       "using ADC");
    equals(cpu.p.c, 0, "0x7f + 0x01 should not set the carry(c) bit when "+
                       "using ADC");
    equals(cpu.p.z, 0, "0x7f + 0x01 should not set the zero(z) bit when "+
                       "using ADC");
    equals(cpu.p.n, 1, "0x7f + 0x01 should set the negative(n) bit when "+
                       "using ADC");   
  });

  test("Test ADC direct page with 16-bit numbers (m bit is 0)", function() {
    var cpu = new CPU_65816();
    cpu.execute("18fb18c230a9010085fea9ff7f65fe");
    equals(cpu.r.a, 0x8000, "0x7fff + 0x0001 should result in 0x8000 when "+
                            "using ADC");
    equals(cpu.p.v, 1, "0x7fff + 0x0001 should set the overflow(v) bit when "+
                       "using ADC");
    equals(cpu.p.c, 0, "0x7fff + 0x0001 should not set the carry(c) bit when "+
                       "using ADC");
    equals(cpu.p.z, 0, "0x7fff + 0x0001 should not set the zero(z) bit when "+
                       "using ADC");
    equals(cpu.p.n, 1, "0x7fff + 0x0001 should set the negative(n) bit when "+
                       "using ADC");   
  });
 
  test("Test ADC absolute with 8-bit numbers (m bit is 1)", function() {
    var cpu = new CPU_65816();
    cpu.execute("18fb18e230a9018dffffa97f6dffff");
    equals(cpu.r.a, 0x80, "0x7f + 0x01 should result in 0x80 when "+
                            "using ADC");
    equals(cpu.p.v, 1, "0x7f + 0x01 should set the overflow(v) bit when "+
                       "using ADC");
    equals(cpu.p.c, 0, "0x7f + 0x01 should not set the carry(c) bit when "+
                       "using ADC");
    equals(cpu.p.z, 0, "0x7f + 0x01 should not set the zero(z) bit when "+
                       "using ADC");
    equals(cpu.p.n, 1, "0x7f + 0x01 should set the negative(n) bit when "+
                       "using ADC");   
  });

  test("Test ADC absolute with 16-bit numbers (m bit is 0)", function() {
    var cpu = new CPU_65816();
    cpu.execute("18fb18c230a901008dffffa9ff7f6dffff");
    equals(cpu.r.a, 0x8000, "0x7fff + 0x0001 should result in 0x8000 when "+
                            "using ADC");
    equals(cpu.p.v, 1, "0x7fff + 0x0001 should set the overflow(v) bit when "+
                       "using ADC");
    equals(cpu.p.c, 0, "0x7fff + 0x0001 should not set the carry(c) bit when "+
                       "using ADC");
    equals(cpu.p.z, 0, "0x7fff + 0x0001 should not set the zero(z) bit when "+
                       "using ADC");
    equals(cpu.p.n, 1, "0x7fff + 0x0001 should set the negative(n) bit when "+
                       "using ADC");   
  });

  test("Test ADC direct page indirect with 8-bit numbers (m bit is 1)", 
       function() {
    var cpu = new CPU_65816();
    cpu.execute("18fb18e230a90185ffa9ff85fd64fea97f72fd");
    equals(cpu.r.a, 0x80, "0x7f + 0x01 should result in 0x80 when "+
                            "using ADC");
    equals(cpu.p.v, 1, "0x7f + 0x01 should set the overflow(v) bit when "+
                       "using ADC");
    equals(cpu.p.c, 0, "0x7f + 0x01 should not set the carry(c) bit when "+
                       "using ADC");
    equals(cpu.p.z, 0, "0x7f + 0x01 should not set the zero(z) bit when "+
                       "using ADC");
    equals(cpu.p.n, 1, "0x7f + 0x01 should set the negative(n) bit when "+
                       "using ADC");   
  });
  test("Test ADC direct page indirect with 16-bit numbers (m bit is 0)", 
       function() {
    var cpu = new CPU_65816();
    cpu.execute("18fb18c230a901008500a9000085bba9ff7f72bb");
    equals(cpu.r.a, 0x8000, "0x7fff + 0x0001 should result in 0x8000 when "+
                            "using ADC");
    equals(cpu.p.v, 1, "0x7fff + 0x0001 should set the overflow(v) bit when "+
                       "using ADC");
    equals(cpu.p.c, 0, "0x7fff + 0x0001 should not set the carry(c) bit when "+
                       "using ADC");
    equals(cpu.p.z, 0, "0x7fff + 0x0001 should not set the zero(z) bit when "+
                       "using ADC");
    equals(cpu.p.n, 1, "0x7fff + 0x0001 should set the negative(n) bit when "+
                       "using ADC");   

  });
}

function test_branching() {
  module("Branching");
  test("Test that BRA with 0x00 as its argument doesn't increment or "+
       "decrement the program counter", function() {
    var cpu = new CPU_65816();
    cpu.execute("8000");
    // NOTE: 0x8003 is subject to change however I decide to lay out memory
    // eventually.
    equals(cpu.r.pc, 0x8003, "Make sure that the program counter isn't "+
                             "incremented or decremented if BRA is given "+
                             "0x00 as its argument.");
  });

  test("Check that the branching operations properly treat the argument as "+
       "a two's complement number", function() {
    var cpu = new CPU_65816();
    cpu.execute("80f0"); // negative two's complement number 0xf0 = -16
    equals(cpu.r.pc, (0x8003-16), "A branching operation when given a "+
                                  "negative two's complement number should "+
                                  "decrement the program counter by the "+
                                  "proper amount.");    
    cpu.execute("8020"); // positive two's complement number.
    equals(cpu.r.pc, (0x8003+0x20), "A branching operation when given a "+
                                    "positive two's complement number should "+
                                    "increment the program counter by the "+
                                    "proper amount.");
  });
  
  test("Check that BPL works as expected", function() {
    var cpu = new CPU_65816();
    cpu.execute("18fbc230a9fe7f1a10fd");
    equals(cpu.r.a, 0x8000, "Check that branching only occurs while the "+
                            "number is a two's complement positive number.");
  });

  test("Check that BMI works as expected", function() {
    var cpu = new CPU_65816();
    cpu.execute("18fbc230a901803a30fd");
    equals(cpu.r.a, 0x7fff, "Check that branching only occurs while the "+
                            "number is a two's complement negative number.");
  });
}

function test_sep() {
  module("SEP");
  test("Test 'SEP #$30' not in emulation mode", function() {
    var cpu = new CPU_65816();
    cpu.p.e = 0;
    cpu.execute("e230");
    equals(cpu.p.m, 1, "'SEP #$30' should set the m status bit of the p "+
                       "register to 1");
    equals(cpu.p.x, 1, "'SEP #$30' should set the x status bit of the p "+
                       "register to 1");
    equals(cpu.p.n, 0, "'SEP #$30' should not set the n status bit of the p "+
                       "register to 1.");
    equals(cpu.p.c, 0, "'SEP #$30' should not set the c status bit of the p "+
                       "register to 1.");
    equals(cpu.p.z, 0, "'SEP #$30' should not set the z status bit of the p "+
                       "register to 1.");
    equals(cpu.p.d, 0, "'SEP #$30' should not set the d status bit of the p "+
                       "register to 1.");
    equals(cpu.p.v, 0, "'SEP #$30' should not set the v status bit of the p "+
                       "register to 1.");
    equals(cpu.p.i, 0, "'SEP #$30' should not set the i status bit of the p "+
                       "register to 1.");
  });
  test("Test 'SEP #$cf' not in emulation mode", function() {
    var cpu = new CPU_65816();
    cpu.p.e = 0;
    cpu.execute("e2cf"); 
    equals(cpu.p.m, 0, "'SEP #$cf' should not set the m status bit of the p "+
                       "register to 1");
    equals(cpu.p.x, 0, "'SEP #$cf' should not set the x status bit of the p "+
                       "register to 1");
    equals(cpu.p.n, 1, "'SEP #$cf' should set the n status bit of the p "+
                       "register to 1.");
    equals(cpu.p.c, 1, "'SEP #$cf' should set the c status bit of the p "+
                       "register to 1.");
    equals(cpu.p.z, 1, "'SEP #$cf' should set the z status bit of the p "+
                       "register to 1.");
    equals(cpu.p.d, 1, "'SEP #$cf' should set the d status bit of the p "+
                       "register to 1.");
    equals(cpu.p.v, 1, "'SEP #$cf' should set the v status bit of the p "+
                       "register to 1.");
    equals(cpu.p.i, 1, "'SEP #$cf' should set the i status bit of the p "+
                       "register to 1.");
  });
}

function test_rep() {
  module("REP");
  test("Test 'REP #$30' not in emulation mode", function() {
    var cpu = new CPU_65816();
    cpu.p.e = 0;
    // Make sure stuff is cleared by setting all of the bits to 1 initially.
    cpu.p.n = 1;
    cpu.p.c = 1;
    cpu.p.v = 1;
    cpu.p.i = 1;
    cpu.p.d = 1;
    cpu.p.x = 1;
    cpu.p.m = 1;
    cpu.p.z = 1;
    cpu.execute("c230");
    equals(cpu.p.m, 0, "'REP #$30' should clear the m bit of the p status "+
                       "register");
    equals(cpu.p.x, 0, "'REP #$30' should clear the x bit of the p status "+
                       "register");
    equals(cpu.p.d, 1, "'REP #$30' should not clear the d bit of the p "+
                       "status register");
    equals(cpu.p.i, 1, "'REP #$30' should not clear the i bit of the p "+
                       "status register");
    equals(cpu.p.c, 1, "'REP #$30' should not clear the c bit of the p "+
                       "status register");
    equals(cpu.p.z, 1, "'REP #$30' should not clear the z bit of the p "+
                       "status register");
    equals(cpu.p.v, 1, "'REP #$30' should not clear the v bit of the p "+
                       "status register");
    equals(cpu.p.n, 1, "'REP #$30' should not clear the n bit of the p "+
                       "status register");
  });

  test("Test 'REP #$cf' not in emulation mode", function() {
    var cpu = new CPU_65816();
    cpu.p.e = 0;
    // Make sure stuff is cleared by setting all of the bits to 1 initially.
    cpu.p.n = 1;
    cpu.p.c = 1;
    cpu.p.v = 1;
    cpu.p.i = 1;
    cpu.p.d = 1;
    cpu.p.x = 1;
    cpu.p.m = 1;
    cpu.p.z = 1;
    cpu.execute("c2cf");
    equals(cpu.p.m, 1, "'REP #$cf' should not clear the m bit of the p "+
                       "status register");
    equals(cpu.p.x, 1, "'REP #$cf' should not clear the x bit of the p "+
                       "status register");
    equals(cpu.p.z, 0, "'REP #$cf' should clear the z bit of the p status "+
                       "register");
    equals(cpu.p.n, 0, "'REP #$cf' should clear the n bit of the p status "+
                       "register");
    equals(cpu.p.d, 0, "'REP #$cf' should clear the d bit of the p status "+
                       "register");
    equals(cpu.p.v, 0, "'REP #$cf' should clear the v bit of the p status "+
                       "register");
    equals(cpu.p.i, 0, "'REP #$cf' should clear the i bit of the p status "+
                       "register");
    equals(cpu.p.c, 0, "'REP #$cf' should clear the c bit of the p status "+
                       "register");
  });
}