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Emulator: Fix LD a16,SP opcode: 0x08

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Riyyi
2022-09-01 14:26:58 +02:00
parent c8ad40c128
commit 1c0809b611
1 changed files with 4 additions and 2 deletions
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src/cpu.cpp
+4 -2
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@@ -1321,7 +1321,9 @@ void CPU::ldr16()
m_wait_cycles += 20; m_wait_cycles += 20;
// Put value of SP into address given by next 2 bytes in memory // Put value of SP into address given by next 2 bytes in memory
write(pcRead16(), m_sp); uint32_t address = pcRead16();
write(address, m_sp & 0xff); // lsb(SP)
write((address + 1) & 0xffff, m_sp >> 8); // msb(SP)
break; break;
} }
case 0xf8: { // LD HL,SP + s8 == LDHL SP,s8, flags: 0 0 H C case 0xf8: { // LD HL,SP + s8 == LDHL SP,s8, flags: 0 0 H C
@@ -1330,8 +1332,8 @@ void CPU::ldr16()
// Put SP + next (signed) byte in memory into HL // Put SP + next (signed) byte in memory into HL
uint32_t signed_data = (pcRead() ^ 0x80) - 0x80; uint32_t signed_data = (pcRead() ^ 0x80) - 0x80;
uint32_t sum = m_sp + signed_data; uint32_t sum = m_sp + signed_data;
m_h = sum >> 8;
m_l = sum & 0xff; m_l = sum & 0xff;
m_h = sum >> 8;
// Set flags // Set flags
m_zf = 0; m_zf = 0;