mirror of
https://github.com/pskupinski/65816.js.git
synced 2024-11-04 11:07:34 +00:00
508 lines
23 KiB
JavaScript
508 lines
23 KiB
JavaScript
/*
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* Copyright (c) 2011, Preston Skupinski <skupinsk@cse.msu.edu>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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function run_tests() {
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test_rep();
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test_sep();
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test_branching();
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test_adc();
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test_sbc();
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test_cmp();
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test_subroutines();
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test_mvn_and_mvp();
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test_emulation_mode();
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}
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function test_emulation_mode() {
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module("Emulation Mode");
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test("Make sure pulling from the stack when the stack register is at 0x1ff"+
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"causes the stack register to pull from 0x100.", function() {
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var cpu = new CPU_65816();
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cpu.execute("a9fe8d0001a90068");
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equals(cpu.r.s, 0, "The stack register should be 0 after the pull "+
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"operation.");
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equals(cpu.r.a, 0xfe, "The accumulator should be 0xfe after the pull "+
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"operation.");
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});
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}
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function test_mvn_and_mvp() {
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module("MVN and MVP");
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test("Test a short example program for MVP", function() {
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var cpu = new CPU_65816();
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cpu.execute("18fbe230a9ab8dff0fa9cd8d0010c230a90100a20010a00020440000");
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equals(cpu.r.a, 0xffff, "After executing the example program the "+
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"accumulator should've underflowed and "+
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"resulted in 0xffff.");
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equals(cpu.r.x, 0x0ffe, "After executing the example program the x "+
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"register should be 0x0ffe.");
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equals(cpu.r.y, 0x1ffe, "After executing the example program the y "+
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"register should be 0x1ffe.");
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var byte_one = cpu.mmu.read_byte(0x1fff);
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var byte_two = cpu.mmu.read_byte(0x2000);
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equals(byte_one, 0xab, "After executing the example program 0x001fff "+
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"in memory should contain 0xab.");
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equals(byte_two, 0xcd, "After executing the example program 0x002000 "+
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"in memory should contain 0xcd.");
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});
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}
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function test_subroutines() {
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module("Subroutines");
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test("Short program to check that JSR and RTS work", function() {
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var cpu = new CPU_65816();
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// It jumps to 0xffff so it doesn't execute the subroutine again and
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// effectively halts the program.
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cpu.execute("18fbc23018a9ffff200e804cffff3a60");
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equals(cpu.r.a, 0xfffe, "The subroutine should execute exactly once, "+
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"decrementing 0xffff to 0xfffe.");
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});
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}
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function test_cmp() {
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module("CMP");
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test("Compare two 8-bit numbers, 0x01 and 0xff", function() {
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var cpu = new CPU_65816();
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cpu.execute("18fbe23018a901c9ff");
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equals(cpu.r.a, 0x01, "CMP should not change the value of the "+
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"accumulator");
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equals(cpu.p.z, 0, "When comparing 0x01 and 0xff the zero(z) bit "+
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"should not be set (0x01 != 0xff)");
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equals(cpu.p.n, 0, "When comparing 0x01 and 0xff the negative(n) bit "+
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"should not be set");
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equals(cpu.p.c, 0, "When comparing 0x01 and 0xff the carry(c) bit "+
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"should not be set (0x01 < 0xff)");
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});
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test("Compare two 16-bit numbers, 0xff01 and 0xfeff", function() {
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var cpu = new CPU_65816();
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cpu.execute("18fbc23018a901ffc9fffe");
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equals(cpu.r.a, 0xff01, "CMP should not change the value of the "+
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"accumulator");
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equals(cpu.p.n, 0, "When comparing 0xff01 and 0xfeff the negative(n) "+
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"bit should not be set");
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equals(cpu.p.z, 0, "When comparing 0xff01 and 0xfeff the zero(z) bit "+
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"should not be set (0xff01 != 0xfeff)");
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equals(cpu.p.c, 1, "When comparing 0xff01 and 0xfeff the carry(c) bit "+
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"should be set (0xff01 >= 0xfeff)");
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});
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}
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function test_sbc() {
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module("SBC");
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test("Test normal subtraction of two 8-bit numbers that don't cause a "+
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"borrow.", function() {
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var cpu = new CPU_65816();
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cpu.execute("18fbe23018a901e901");
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equals(cpu.r.a, 0, "0x01 - 0x01 should result in zero when using "+
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"SBC");
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equals(cpu.p.z, 1, "0x01 - 0x01 should set the zero(z) bit when "+
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"using SBC");
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equals(cpu.p.n, 0, "0x01 - 0x01 should not set the negative(n) bit "+
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"when using SBC");
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equals(cpu.p.v, 0, "0x01 - 0x01 should not set the overflow(v) bit "+
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"when using SBC");
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equals(cpu.p.c, 1, "0x01 - 0x01 should set the carry(c) bit when using "+
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"SBC");
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});
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test("Test normal subtraction of two 16-bit numbers that don't cause a "+
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"borrow.", function() {
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var cpu = new CPU_65816();
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cpu.execute("18fbc23018a90100e90100");
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equals(cpu.r.a, 0, "0x0001 - 0x0001 should result in zero when using "+
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"SBC");
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equals(cpu.p.z, 1, "0x0001 - 0x0001 should set the zero(z) bit when "+
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"using SBC");
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equals(cpu.p.n, 0, "0x0001 - 0x0001 should not set the negative(n) bit "+
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"when using SBC");
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equals(cpu.p.v, 0, "0x0001 - 0x0001 should not set the overflow(v) bit "+
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"when using SBC");
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equals(cpu.p.c, 1, "0x0001 - 0x0001 should set the carry(c) bit when "+
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"using SBC");
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});
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test("Test subtraction that triggers a borrow with 8-bit numbers",
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function() {
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var cpu = new CPU_65816();
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cpu.execute("18fbe23018a9d0e9ef");
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equals(cpu.r.a, 0xe1, "0xd0 - 0xef should set the accumulator to 0xe1 "+
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"when using SBC");
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equals(cpu.p.n, 1, "0xd0 - 0xef should set the negative(n) bit when "+
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"using SBC");
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equals(cpu.p.v, 0, "0xd0 - 0xef should not set the overflow(v) bit "+
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"when using SBC");
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equals(cpu.p.z, 0, "0xd0 - 0xef should not set the zero(z) bit when "+
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"using SBC");
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equals(cpu.p.c, 0, "0xd0 - 0xef should not set the carry(c) bit when "+
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"using SBC");
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});
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test("Test subtraction that triggers a borrow with 16-bit numbers",
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function() {
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var cpu = new CPU_65816();
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cpu.execute("18fbc23018a900d0e900ef");
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equals(cpu.r.a, 0xe100, "0xd000 - 0xef00 should set the accumulator to "+
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"0xe0ff when using SBC");
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equals(cpu.p.n, 1, "0xd000 - 0xef00 should set the negative(n) bit when "+
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"using SBC");
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equals(cpu.p.v, 0, "0xd000 - 0xef00 should not set the overflow(v) bit "+
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"when using SBC");
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equals(cpu.p.z, 0, "0xd000 - 0xef00 should not set the zero(z) bit when "+
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"using SBC");
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equals(cpu.p.c, 0, "0xd000 - 0xef00 should not set the carry(c) bit when "+
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"using SBC");
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});
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}
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function test_adc() {
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module("ADC");
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test("Test normal addition of two 16-bit numbers that don't cause an "+
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"overflow (m bit is 0)", function() {
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var cpu = new CPU_65816();
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cpu.execute("18fb18c230a90100690100");
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equals(cpu.r.a, 2, "0x0001 + 0x0001 should result in 0x0002 when using "+
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"ADC");
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equals(cpu.p.n, 0, "0x0001 + 0x0001 does not result in a negative "+
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"two's complement number when adding with ADC.");
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equals(cpu.p.c, 0, "0x0001 + 0x0001 should not set the carry(c) bit when "+
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"adding with ADC");
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equals(cpu.p.z, 0, "0x0001 + 0x0001 should not set the zero(z) bit when "+
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"adding with ADC");
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equals(cpu.p.v, 0, "0x0001 + 0x0001 should not set the overflow(v) bit "+
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"when adding with ADC");
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});
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test("Test normal addition of two 8-bit numbers that don't cause an "+
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"overflow (m bit is 1)", function() {
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var cpu = new CPU_65816();
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cpu.execute("18fb18e230a9016901");
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equals(cpu.r.a, 2, "0x01 + 0x01 should result in 0x02 when using "+
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"ADC");
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equals(cpu.p.n, 0, "0x01 + 0x01 does not result in a negative "+
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"two's complement number when adding with ADC.");
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equals(cpu.p.c, 0, "0x01 + 0x01 should not set the carry(c) bit when "+
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"adding with ADC");
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equals(cpu.p.z, 0, "0x01 + 0x01 should not set the zero(z) bit when "+
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"adding with ADC");
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equals(cpu.p.v, 0, "0x01 + 0x01 should not set the overflow(v) bit "+
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"when adding with ADC");
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});
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test("Test that overflow sets the carry flag and works in general with two"+
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"16-bit numbers (m bit is 0)", function() {
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var cpu = new CPU_65816();
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cpu.execute("18fb18c230a9ffff690100");
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equals(cpu.p.c, 1, "0xffff + 0x0001 should set the carry bit when using "+
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"ADC");
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equals(cpu.r.a, 0, "0xffff + 0x0001 should result in the accumulator "+
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"being 0 when using ADC");
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equals(cpu.p.n, 0, "0xffff + 0x0001 should not set the negative(n) bit "+
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"when using ADC");
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equals(cpu.p.z, 1, "0xffff + 0x0001 should set the zero(z) bit when using "+
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"ADC");
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equals(cpu.p.v, 0, "0xffff + 0x0001 should not set the overflow(v) bit "+
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"when using ADC");
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});
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test("Test that overflow sets the carry flag and works in general with two"+
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"8-bit numbers (m bit is 1)", function() {
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var cpu = new CPU_65816();
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cpu.execute("18fb18e230a9ff6901");
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equals(cpu.p.c, 1, "0xff + 0x01 should set the carry bit when using "+
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"ADC");
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equals(cpu.r.a, 0, "0xff + 0x01 should result in the accumulator "+
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"being 0 when using ADC");
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equals(cpu.p.n, 0, "0xff + 0x01 should not set the negative(n) bit when "+
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"using ADC");
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equals(cpu.p.z, 1, "0xff + 0x01 should set the zero(z) bit when using "+
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"ADC");
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equals(cpu.p.v, 0, "0xff + 0x01 should not set the overflow(v) bit when "+
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"using ADC");
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});
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test("Test signed overflow with two 8-bit numbers (m bit is 1)", function() {
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var cpu = new CPU_65816();
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cpu.execute("18fb18e230a97f6901");
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equals(cpu.r.a, 0x80, "0x7f + 0x01 should result in 0x80 when "+
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"using ADC");
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equals(cpu.p.v, 1, "0x7f + 0x01 should set the overflow(v) bit when "+
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"using ADC");
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equals(cpu.p.c, 0, "0x7f + 0x01 should not set the carry(c) bit when "+
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"using ADC");
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equals(cpu.p.z, 0, "0x7f + 0x01 should not set the zero(z) bit when "+
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"using ADC");
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equals(cpu.p.n, 1, "0x7f + 0x01 should set the negative(n) bit when "+
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"using ADC");
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});
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test("Test signed overflow with two 16-bit numbers (m bit is 0)", function() {
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var cpu = new CPU_65816();
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cpu.execute("18fb18c230a9ff7f690100");
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equals(cpu.r.a, 0x8000, "0x7fff + 0x0001 should result in 0x8000 when "+
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"using ADC");
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equals(cpu.p.v, 1, "0x7fff + 0x0001 should set the overflow(v) bit when "+
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"using ADC");
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equals(cpu.p.c, 0, "0x7fff + 0x0001 should not set the carry(c) bit when "+
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"using ADC");
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equals(cpu.p.z, 0, "0x7fff + 0x0001 should not set the zero(z) bit when "+
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"using ADC");
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equals(cpu.p.n, 1, "0x7fff + 0x0001 should set the negative(n) bit when "+
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"using ADC");
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});
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test("Test ADC direct page with 8-bit numbers (m bit is 1)", function() {
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var cpu = new CPU_65816();
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cpu.execute("18fb18e230a90185ffa97f65ff");
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equals(cpu.r.a, 0x80, "0x7f + 0x01 should result in 0x80 when "+
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"using ADC");
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equals(cpu.p.v, 1, "0x7f + 0x01 should set the overflow(v) bit when "+
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"using ADC");
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equals(cpu.p.c, 0, "0x7f + 0x01 should not set the carry(c) bit when "+
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"using ADC");
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equals(cpu.p.z, 0, "0x7f + 0x01 should not set the zero(z) bit when "+
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"using ADC");
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equals(cpu.p.n, 1, "0x7f + 0x01 should set the negative(n) bit when "+
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"using ADC");
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});
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test("Test ADC direct page with 16-bit numbers (m bit is 0)", function() {
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var cpu = new CPU_65816();
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cpu.execute("18fb18c230a9010085fea9ff7f65fe");
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equals(cpu.r.a, 0x8000, "0x7fff + 0x0001 should result in 0x8000 when "+
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"using ADC");
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equals(cpu.p.v, 1, "0x7fff + 0x0001 should set the overflow(v) bit when "+
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"using ADC");
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equals(cpu.p.c, 0, "0x7fff + 0x0001 should not set the carry(c) bit when "+
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"using ADC");
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equals(cpu.p.z, 0, "0x7fff + 0x0001 should not set the zero(z) bit when "+
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"using ADC");
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equals(cpu.p.n, 1, "0x7fff + 0x0001 should set the negative(n) bit when "+
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"using ADC");
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});
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test("Test ADC absolute with 8-bit numbers (m bit is 1)", function() {
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var cpu = new CPU_65816();
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cpu.execute("18fb18e230a9018dffffa97f6dffff");
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equals(cpu.r.a, 0x80, "0x7f + 0x01 should result in 0x80 when "+
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"using ADC");
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equals(cpu.p.v, 1, "0x7f + 0x01 should set the overflow(v) bit when "+
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"using ADC");
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equals(cpu.p.c, 0, "0x7f + 0x01 should not set the carry(c) bit when "+
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"using ADC");
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equals(cpu.p.z, 0, "0x7f + 0x01 should not set the zero(z) bit when "+
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"using ADC");
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equals(cpu.p.n, 1, "0x7f + 0x01 should set the negative(n) bit when "+
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"using ADC");
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});
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test("Test ADC absolute with 16-bit numbers (m bit is 0)", function() {
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var cpu = new CPU_65816();
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cpu.execute("18fb18c230a901008dffffa9ff7f6dffff");
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equals(cpu.r.a, 0x8000, "0x7fff + 0x0001 should result in 0x8000 when "+
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"using ADC");
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equals(cpu.p.v, 1, "0x7fff + 0x0001 should set the overflow(v) bit when "+
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"using ADC");
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equals(cpu.p.c, 0, "0x7fff + 0x0001 should not set the carry(c) bit when "+
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"using ADC");
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equals(cpu.p.z, 0, "0x7fff + 0x0001 should not set the zero(z) bit when "+
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"using ADC");
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equals(cpu.p.n, 1, "0x7fff + 0x0001 should set the negative(n) bit when "+
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"using ADC");
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});
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test("Test ADC direct page indirect with 8-bit numbers (m bit is 1)",
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function() {
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var cpu = new CPU_65816();
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cpu.execute("18fb18e230a90185ffa9ff85fd64fea97f72fd");
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equals(cpu.r.a, 0x80, "0x7f + 0x01 should result in 0x80 when "+
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"using ADC");
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equals(cpu.p.v, 1, "0x7f + 0x01 should set the overflow(v) bit when "+
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"using ADC");
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equals(cpu.p.c, 0, "0x7f + 0x01 should not set the carry(c) bit when "+
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"using ADC");
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equals(cpu.p.z, 0, "0x7f + 0x01 should not set the zero(z) bit when "+
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"using ADC");
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equals(cpu.p.n, 1, "0x7f + 0x01 should set the negative(n) bit when "+
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"using ADC");
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});
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test("Test ADC direct page indirect with 16-bit numbers (m bit is 0)",
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function() {
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var cpu = new CPU_65816();
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cpu.execute("18fb18c230a901008500a9000085bba9ff7f72bb");
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equals(cpu.r.a, 0x8000, "0x7fff + 0x0001 should result in 0x8000 when "+
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"using ADC");
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equals(cpu.p.v, 1, "0x7fff + 0x0001 should set the overflow(v) bit when "+
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"using ADC");
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equals(cpu.p.c, 0, "0x7fff + 0x0001 should not set the carry(c) bit when "+
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"using ADC");
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equals(cpu.p.z, 0, "0x7fff + 0x0001 should not set the zero(z) bit when "+
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"using ADC");
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equals(cpu.p.n, 1, "0x7fff + 0x0001 should set the negative(n) bit when "+
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"using ADC");
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});
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}
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function test_branching() {
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module("Branching");
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test("Test that BRA with 0x00 as its argument doesn't increment or "+
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"decrement the program counter", function() {
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var cpu = new CPU_65816();
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cpu.execute("8000");
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// NOTE: 0x8003 is subject to change however I decide to lay out memory
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// eventually.
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equals(cpu.r.pc, 0x8003, "Make sure that the program counter isn't "+
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"incremented or decremented if BRA is given "+
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"0x00 as its argument.");
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});
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test("Check that the branching operations properly treat the argument as "+
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"a two's complement number", function() {
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var cpu = new CPU_65816();
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cpu.execute("80f0"); // negative two's complement number 0xf0 = -16
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equals(cpu.r.pc, (0x8003-16), "A branching operation when given a "+
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"negative two's complement number should "+
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"decrement the program counter by the "+
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"proper amount.");
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cpu.execute("8020"); // positive two's complement number.
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equals(cpu.r.pc, (0x8003+0x20), "A branching operation when given a "+
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"positive two's complement number should "+
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"increment the program counter by the "+
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"proper amount.");
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});
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test("Check that BPL works as expected", function() {
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var cpu = new CPU_65816();
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cpu.execute("18fbc230a9fe7f1a10fd");
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equals(cpu.r.a, 0x8000, "Check that branching only occurs while the "+
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"number is a two's complement positive number.");
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});
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test("Check that BMI works as expected", function() {
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var cpu = new CPU_65816();
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cpu.execute("18fbc230a901803a30fd");
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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");
|
|
});
|
|
}
|