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Emulator: Add comments to cycle waiting amount

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Riyyi
2022-08-30 15:20:54 +02:00
parent baa679904c
commit 024e6aecc3
1 changed files with 16 additions and 12 deletions
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src/cpu.cpp
+16 -12
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@@ -929,24 +929,28 @@ void CPU::ldr8()
{ {
uint8_t opcode = pcRead(); uint8_t opcode = pcRead();
switch (opcode) { switch (opcode) {
case 0x02: // LD (BC),A case 0x02: /* LD (BC),A */ {
m_wait_cycles += 4; m_wait_cycles += 4; // + 4 = 8 total
write(bc(), m_a); write(bc(), m_a);
break; break;
case 0x0a: // LD A,(BC) }
m_wait_cycles += 4; case 0x0a: /* LD A,(BC) */ {
m_wait_cycles += 4; // + 4 = 8 total
m_a = read(bc()); m_a = read(bc());
break; break;
case 0x12: // LD (DE),A }
m_wait_cycles += 4; case 0x12: /* LD (DE),A */ {
m_wait_cycles += 4; // + 4 = 8 total
write(de(), m_a); write(de(), m_a);
break; break;
case 0x1a: // LD A,(DE) }
m_wait_cycles += 4; case 0x1a: /* LD A,(DE) */ {
m_wait_cycles += 4; // + 4 = 8 total
m_a = read(de()); m_a = read(de());
break; break;
case 0x22: { // LD (HL+),A == LD (HLI),A == LDI (HL),A }
m_wait_cycles += 4; case 0x22: /* LD (HL+),A == LD (HLI),A == LDI (HL),A */ {
m_wait_cycles += 4; // + 4 = 8 total
// Put A into memory address in HL // Put A into memory address in HL
uint32_t address = hl(); uint32_t address = hl();
@@ -958,8 +962,8 @@ void CPU::ldr8()
m_h = address >> 8; m_h = address >> 8;
break; break;
} }
case 0x32: { // LD (HL-),A == LD (HLD),A == LDD (HL),A case 0x32: /* LD (HL-),A == LD (HLD),A == LDD (HL),A */ {
m_wait_cycles += 4; m_wait_cycles += 4; // + 4 = 8 total
// Put A into memory address in HL // Put A into memory address in HL
uint32_t address = hl(); uint32_t address = hl();