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Emulator: Add opcode $0a/$0e/$1a/$1e/$2a/$2e/$3a

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Riyyi
2022-08-23 13:38:08 +02:00
parent af07357812
commit 16235b4663
1 changed files with 60 additions and 0 deletions
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src/cpu.cpp
+60
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@@ -65,15 +65,22 @@ void CPU::update()
case 0x02: ld8(); break;
case 0x06: ld8(); break;
case 0x08: ld16(); break;
case 0x0a: ld8(); break;
case 0x0e: ld8(); break;
case 0x11: ld16(); break;
case 0x12: ld8(); break;
case 0x16: ld8(); break;
case 0x1a: ld8(); break;
case 0x1e: ld8(); break;
case 0x21: ld16(); break;
case 0x22: ld8(); break;
case 0x26: ld8(); break;
case 0x2a: ld8(); break;
case 0x2e: ld8(); break;
case 0x31: ld16(); break;
case 0x32: ld8(); break;
case 0x36: ld8(); break;
case 0x3a: ld8(); break;
case 0x3e: ld8(); break;
case 0xa8: xor8(); break;
case 0xaf: xor8(); break;
@@ -153,6 +160,16 @@ void CPU::ld8()
m_wait_cycles += 8;
m_b = pcRead();
break;
case 0x0a:
// LD A,(BC)
m_wait_cycles += 8;
m_a = read(bc());
break;
case 0x0e:
// LD C,n
m_wait_cycles += 8;
m_c = pcRead();
break;
case 0x12:
// LD (DE),A
m_wait_cycles += 8;
@@ -163,6 +180,16 @@ void CPU::ld8()
m_wait_cycles += 8;
m_d = pcRead();
break;
case 0x1a:
// LD A,(DE)
m_wait_cycles += 8;
m_a = read(de());
break;
case 0x1e:
// LD E,n
m_wait_cycles += 8;
m_e = pcRead();
break;
case 0x22: {
// LD (HL+),A == LD (HLI),A == LDI (HL),A
m_wait_cycles += 8;
@@ -182,6 +209,25 @@ void CPU::ld8()
m_wait_cycles += 8;
m_h = pcRead();
break;
case 0x2a: {
// LD A,(HL+) == LD A,(HLI) == LDI A,(HL)
m_wait_cycles += 8;
// Put value at address in HL into A
uint32_t address = hl();
m_a = read(address);
// Increment HL
address = (address + 1) & 0xffff;
m_l = address & 0x00ff;
m_h = address >> 8;
break;
}
case 0x2e:
// LD L,n
m_wait_cycles += 8;
m_l = pcRead();
break;
case 0x32: {
// LD (HL-),A == LD (HLD),A == LDD (HL),A
m_wait_cycles += 8;
@@ -201,6 +247,20 @@ void CPU::ld8()
m_wait_cycles += 12;
write(hl(), pcRead());
break;
case 0x3a: {
// LD A,(HL-) == LD A,(HLD) == LDD A,(HL)
m_wait_cycles += 8;
// Put value at address in HL into A
uint32_t address = hl();
m_a = read(address);
// Decrement HL
address = (address + 1) & 0xffff;
m_l = address & 0x00ff;
m_h = address >> 8;
break;
}
case 0x3e:
// LD A,n
m_wait_cycles += 8;