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added ADC, ADS, RAR

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This commit is contained in:
hap 2015-02-10 19:56:10 +01:00
parent eab6156360
commit dcf589f304
1 changed files with 8 additions and 3 deletions
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11
src/emu/cpu/ucom4/ucom4op.inc
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@ -180,13 +180,16 @@ void ucom4_cpu_device::op_ad()
void ucom4_cpu_device::op_adc()
{
// ADC: Add RAM and carry to ACC, store Carry F/F
op_illegal();
m_acc += ram_r() + m_carry_f;
m_carry_f = m_acc >> 4 & 1;
m_acc &= 0xf;
}
void ucom4_cpu_device::op_ads()
{
// ADS: Add RAM and carry to ACC, store Carry F/F, skip next on carry
op_illegal();
op_adc();
m_skip = (m_carry_f != 0);
}
void ucom4_cpu_device::op_daa()
@ -673,7 +676,9 @@ void ucom4_cpu_device::op_rar()
if (!check_op_43()) return;
// RAR: Rotate ACC Right through Carry F/F
op_illegal();
UINT8 c = m_acc & 1;
m_acc = m_acc >> 1 | m_carry_f << 3;
m_carry_f = c;
}