/**
* @brief Logical OR on Accumulator
*/
void Cpu::ora(uint8_t v, uint8_t cycles)
{
a(a()|v);
SET_ZF(a());
SET_NF(a());
tick(cycles);
}
/**
* @brief Logical AND
*/
void Cpu::_and(uint8_t v, uint8_t cycles)
{
a(a()&v);
SET_ZF(a());
SET_NF(a());
tick(cycles);
}
/**
* @brief Transfer Y to Accumulator
*/
void Cpu::tya()
{
a(y());
SET_ZF(a());
SET_NF(a());
tick(2);
}
/**
* @brief PuLl Accumulator
*/
void Cpu::pla()
{
a(pop());
SET_ZF(a());
SET_NF(a());
tick(4);
}
/**
* @brief Transfer Accumulator to X
*/
void Cpu::tax()
{
x(a());
SET_ZF(x());
SET_NF(x());
tick(2);
}
/**
* @brief Transfer Accumulator to Y
*/
void Cpu::tay()
{
y(a());
SET_ZF(y());
SET_NF(y());
tick(2);
}
/**
* @brief Transfer X to Accumulator
*/
void Cpu::txa()
{
a(x());
SET_ZF(a());
SET_NF(a());
tick(2);
}
/**
* @brief LoaD Y
*/
void Cpu::ldy(uint8_t v, uint8_t cycles)
{
y(v);
SET_ZF(y());
SET_NF(y());
tick(cycles);
}
/**
* @brief LoaD X
*/
void Cpu::ldx(uint8_t v, uint8_t cycles)
{
x(v);
SET_ZF(x());
SET_NF(x());
tick(cycles);
}
/**
* @brief LoaD Accumulator
*/
void Cpu::lda(uint8_t v, uint8_t cycles)
{
a(v);
SET_ZF(a());
SET_NF(a());
tick(cycles);
}
/**
* @brief Transfer Stack pointer to X
*/
void Cpu::tsx()
{
x(sp());
SET_ZF(x());
SET_NF(x());
tick(2);
}
/**
* @brief ROtate Left
*/
uint8_t Cpu::rol(uint8_t v)
{
uint16_t t = (v << 1) | (uint8_t)cf();
cf((t&0x100)!=0);
SET_ZF(t);
SET_NF(t);
return (uint8_t)t;
}
/**
* @brief BIT test
*/
void Cpu::bit(uint16_t addr, uint8_t cycles)
{
uint8_t t = load_byte(addr);
of((t&0x40)!=0);
SET_NF(t);
SET_ZF(t&a());
tick(cycles);
}
static void ddr_get_dpll_cfg(uint32_t *p)
{
uint32_t nmhz, NO, NF, NR;
nmhz = ddr_get_phy_pll_freq();
if (nmhz <= 150)
NO = 6;
else if (nmhz <= 250)
NO = 4;
else if (nmhz <= 500)
NO = 2;
else
NO = 1;
NR = 1;
NF = 2 * nmhz * NR * NO / 24;
p[0] = SET_NR(NR) | SET_NO(NO);
p[1] = SET_NF(NF);
p[2] = SET_NB(NF / 2);
}
