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Palindromic Bread Loaf
2025-07-23 09:45:34 -04:00
parent 574d3e1312
commit aabb5af5ee
1 changed files with 17 additions and 17 deletions
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34
src/cpu.cpp
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@@ -205,23 +205,6 @@ uint16_t CPU::AdjustDecimal(const uint16_t binary_result, const bool is_16bit) {
void CPU::ExecuteInstruction() {
// TODO: Actual Opcode decoding
switch (const uint8_t opcode = bus->Read(PC++)) {
// Bitwise AND Instructions
case 0x29: AND_Immediate(); break; // AND #$nn or #$nnnn
case 0x2D: AND_Absolute(); break; // AND $nnnn
case 0x3D: AND_AbsoluteX(); break; // AND $nnnn,X
case 0x39: AND_AbsoluteY(); break; // AND $nnnn,Y
case 0x25: AND_DirectPage(); break; // AND $nn
case 0x35: AND_DirectPageX(); break; // AND $nn,X
case 0x32: AND_IndirectDirectPage(); break; // AND ($nn)
case 0x27: AND_IndirectDirectPageLong(); break; // AND [$nn]
case 0x21: AND_IndexedIndirectDirectPageX(); break; // AND ($nn,X)
case 0x31: AND_IndirectDirectPageY(); break; // AND ($nn),Y
case 0x37: AND_IndirectDirectPageLongY(); break; // AND [$nn],Y
case 0x2F: AND_AbsoluteLong(); break; // AND $nnnnnn
case 0x3F: AND_AbsoluteLongX(); break; // AND $nnnnnn,X
case 0x23: AND_StackRelative(); break; // AND $nn,S
case 0x33: AND_StackRelativeIndirectY(); break; // AND ($nn,S),Y
// ADC - Add with Carry
case 0x69: ADC_Immediate(); break; // ADC #$nn/#$nnnn
case 0x6D: ADC_Absolute(); break; // ADC $nnnn
@@ -239,6 +222,23 @@ void CPU::ExecuteInstruction() {
case 0x63: ADC_StackRelative(); break; // ADC $nn,S
case 0x73: ADC_StackRelativeIndirectY(); break; // ADC ($nn,S),Y
// Bitwise AND Instructions
case 0x29: AND_Immediate(); break; // AND #$nn or #$nnnn
case 0x2D: AND_Absolute(); break; // AND $nnnn
case 0x3D: AND_AbsoluteX(); break; // AND $nnnn,X
case 0x39: AND_AbsoluteY(); break; // AND $nnnn,Y
case 0x25: AND_DirectPage(); break; // AND $nn
case 0x35: AND_DirectPageX(); break; // AND $nn,X
case 0x32: AND_IndirectDirectPage(); break; // AND ($nn)
case 0x27: AND_IndirectDirectPageLong(); break; // AND [$nn]
case 0x21: AND_IndexedIndirectDirectPageX(); break; // AND ($nn,X)
case 0x31: AND_IndirectDirectPageY(); break; // AND ($nn),Y
case 0x37: AND_IndirectDirectPageLongY(); break; // AND [$nn],Y
case 0x2F: AND_AbsoluteLong(); break; // AND $nnnnnn
case 0x3F: AND_AbsoluteLongX(); break; // AND $nnnnnn,X
case 0x23: AND_StackRelative(); break; // AND $nn,S
case 0x33: AND_StackRelativeIndirectY(); break; // AND ($nn,S),Y
// Branch Instructions
case 0xF0: BEQ_Relative(); break; // BEQ $nn
case 0xD0: BNE_Relative(); break; // BNE $nn