void tlcs870_device::do_LD_inpp_indirectbit_CF(const uint8_t opbyte0, const uint8_t opbyte1)
{
/*
OP (opbyte0) (immval0) (opbyte1) (immval1) (immval2) JF ZF CF HF cycles
LD (DE).g, CF 1110 1ggg 1001 1010 1 - - - 5
LD (HL).g, CF 1110 1ggg 1001 1011 1 - - - 5
*/
m_cycles = 5;
const uint8_t bitpos = get_reg8(opbyte0 & 7) & 0x7;
const uint8_t bitused = 1 << bitpos;
const uint16_t addr = get_reg16((opbyte1 & 1) + 2); // DE or HL
uint8_t val = RM8(addr);
if (is_CF()) // if carry flag is set, set the bit in val
{
val |= bitused;
}
else // if carry flag isn't set, clear the bit in val
{
val &= ~bitused;
}
// for this optype of operation ( LD *.b, CF ) the Jump Flag always ends up being 1
set_JF();
WM8(addr, val);
}
void tlcs870_device::do_CPL_inpp_indirectbit(const uint8_t opbyte0, const uint8_t opbyte1)
{
/*
OP (opbyte0) (immval0) (opbyte1) (immval1) (immval2) JF ZF CF HF cycles
CPL (DE).g 1110 1ggg 1001 0010 Z * - - 5
CPL (HL).g 1110 1ggg 1001 0011 Z * - - 5
*/
m_cycles = 5;
const uint8_t bitpos = get_reg8(opbyte0 & 7) & 0x7;
const uint8_t bitused = 1 << bitpos;
const uint16_t addr = get_reg16((opbyte1 & 1) + 2); // DE or HL
m_read_input_port = 0; // reads output latch, not actual ports if accessing memory mapped ports
uint8_t val = RM8(addr);
uint8_t bit = val & bitused;
if (bit) // if the bit is set, clear the zero/jump flags and unset the bit
{
clear_ZF();
clear_JF();
val &= ~bitused;
}
else // if the bit isn't set, set the zero/jump flags and set the bit
{
set_ZF();
set_JF();
val |= bitused;
}
WM8(addr, val);
}
void tlcs870_device::do_CLR_inppbit(const uint8_t opbyte0, const uint8_t opbyte1)
{
/*
OP (opbyte0) (immval0) (opbyte1) (immval1) (immval2) JF ZF CF HF cycles
CLR (DE).g 1110 1ggg 1000 1010 Z * - - 5
CLR (HL).g 1110 1ggg 1000 1011 Z * - - 5
*/
m_cycles = 5;
const uint8_t bitpos = get_reg8(opbyte0 & 7) & 0x7;
const uint8_t bitused = 1 << bitpos;
const uint16_t addr = get_reg16((opbyte1 & 1) + 2); // DE or HL
m_read_input_port = 0; // reads output latch, not actual ports if accessing memory mapped ports
uint8_t val = RM8(addr);
if (val & bitused) // Zero flag gets set based on original value of bit?
{
clear_ZF();
clear_JF(); // 'Z' (so copy Z flag?)
}
else
{
set_ZF();
set_JF(); // 'Z'
}
val &= ~bitused;
WM8(addr, val);
}
void tlcs870_device::do_SET_inppbit(const uint8_t opbyte0, const uint8_t opbyte1)
{
/*
OP (opbyte0) (immval0) (opbyte1) (immval1) (immval2) JF ZF CF HF cycles
SET (DE).g 1110 1ggg 1000 0010 Z * - - 5
SET (HL).g 1110 1ggg 1000 0011 Z * - - 5
*/
m_cycles = 5;
const uint8_t bitpos = get_reg8(opbyte0 & 7) & 0x7;
const uint8_t bitused = 1 << bitpos;
const uint16_t addr = get_reg16((opbyte1 & 1) + 2); // DE or HL
uint8_t val = RM8(addr);
if (val & bitused) // Zero flag gets set based on original value of bit?
{
clear_ZF();
clear_JF(); // 'Z' (so copy Z flag?)
}
else
{
set_ZF();
set_JF(); // 'Z'
}
val |= bitused;
WM8(addr, val);
}
void tlcs870_device::do_RETN(const uint8_t opbyte0, const uint8_t opbyte1)
{
// with E8 only
if (opbyte0 == 0xe8)
{
/*
Return from non-maskable interrupt service (how does this differ from RETI?)
OP (opbyte0) (immval0) (opbyte1) (immval1) (immval2) JF ZF CF HF cycles
RETN 1110 1000 0000 0100 * * * * 7
*/
m_cycles = 7;
m_sp.d += 3;
m_addr = RM16(m_sp.d - 2);
set_PSW(RM8(m_sp.d - 1));
}
else
{
do_regprefixtype_oprand_illegal(opbyte0, opbyte1);
}
}
void tlcs870_device::do_LD_CF_inpp_indirectbit(const uint8_t opbyte0, const uint8_t opbyte1)
{
/*
OP (opbyte0) (immval0) (opbyte1) (immval1) (immval2) JF ZF CF HF cycles
LD CF, (DE).g 1110 1ggg 1001 1110 ~C - * - 4
LD CF, (HL).g 1110 1ggg 1001 1111 ~C - * - 4
aka aka TEST (pp).g
*/
m_cycles = 4;
const uint8_t bitpos = get_reg8(opbyte0 & 7) & 0x7;
const uint8_t bitused = 1 << bitpos;
const uint16_t addr = get_reg16((opbyte1 & 1) + 2); // DE or HL
const uint8_t val = RM8(addr);
const uint8_t bit = val & bitused;
bit ? set_CF() : clear_CF();
// for this optype of operation ( LD CF, *.b ) the Jump Flag always ends up the inverse of the Carry Flag
bit ? clear_JF() : set_JF();
}
void code3(int mode, LPSYMBOL s1, LPSYMBOL s2, LPSYMBOL s3)
{
switch (mode) {
case AM_RR8:
RR8(s1->instr, s2->val8, s3->val8);
break;
case AM_RI8:
RI8(s1->instr, s2->val8, s3->val8);
break;
case AM_RM8:
RM8(s1->instr, s2->val8, s3->val8);
break;
case AM_RA8:
RA8(s1->instr, s2->val8, s3->val16);
break;
case AM_RR16:
RR16(s1->instr, s2->val8, s3->val8);
break;
case AM_RI16:
RI16(s1->instr, s2->val8, s3->val16);
break;
case AM_RM16:
RM16(s1->instr, s2->val8, s3->val8);
break;
case AM_RA16:
RA16(s1->instr, s2->val8, s3->val16);
break;
case AM_MR8:
MR8(s1->instr, s2->val8, s3->val8);
break;
case AM_MR16:
MR16(s1->instr, s2->val8, s3->val8);
break;
case AM_M8I8:
M8I8(s1->instr, s2->val8, s3->val8);
break;
case AM_M16I8:
M16I8(s1->instr, s2->val8, s3->val8);
break;
case AM_MI16:
MI16(s1->instr, s2->val8, s3->val16);
break;
case AM_AR8:
AR8(s1->instr, s2->val16, s3->val8);
break;
case AM_AR16:
AR16(s1->instr, s2->val16, s3->val8);
break;
case AM_A8I8:
A8I8(s1->instr, s2->val16, s3->val8);
break;
case AM_A16I8:
A16I8(s1->instr, s2->val16, s3->val8);
break;
case AM_AI16:
AI16(s1->instr, s2->val16, s3->val16);
break;
default:
break;
}
}
