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51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
//
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// Created by anonymus-raccoon on 2/28/20.
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//
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#include "../CPU.hpp"
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namespace ComSquare::CPU
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{
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int CPU::TAX(uint24_t, AddressingMode)
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{
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if (this->_registers.p.x_b) {
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this->_registers.xl = this->_registers.al;
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this->_registers.p.z = this->_registers.xl == 0;
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this->_registers.p.n = this->_registers.x & 0x80u;
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} else {
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this->_registers.x = this->_registers.a;
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this->_registers.p.z = this->_registers.x == 0;
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this->_registers.p.n = this->_registers.x & 0x8000u;
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}
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return 0;
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}
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int CPU::TAY(uint24_t, AddressingMode)
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{
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if (this->_registers.p.x_b) {
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this->_registers.yl = this->_registers.al;
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this->_registers.p.z = this->_registers.yl == 0;
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this->_registers.p.n = this->_registers.y & 0x80u;
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} else {
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this->_registers.y = this->_registers.a;
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this->_registers.p.z = this->_registers.y == 0;
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this->_registers.p.n = this->_registers.y & 0x8000u;
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}
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return 0;
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}
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int CPU::TXS(uint24_t, AddressingMode)
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{
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if (this->_registers.p.x_b) {
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this->_registers.sh = 0;
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this->_registers.sl = this->_registers.xl;
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this->_registers.p.z = this->_registers.sl == 0;
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this->_registers.p.n = this->_registers.s & 0x80u;
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} else {
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this->_registers.s = this->_registers.x;
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this->_registers.p.z = this->_registers.s == 0;
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this->_registers.p.n = this->_registers.s & 0x8000u;
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}
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return 0;
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}
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} |