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hcd62121: Fixed some silly mistakes in CL flag calculations.

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This commit is contained in:
Ricardo Barreira 2017-11-23 00:45:54 +00:00
parent 631e01d984
commit 3fd99bb3bb
1 changed files with 8 additions and 6 deletions
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14
src/devices/cpu/hcd62121/hcd62121.cpp
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@ -701,10 +701,12 @@ inline void hcd62121_cpu_device::op_addb(int size)
bool zero_low = true;
u8 carry = 0;
set_cl_flag((m_temp1[size-1] & 0x0f) + (m_temp2[size-1] & 0x0f) > 9);
for (int i = 0; i < size; i++)
{
if (i == size - 1) {
set_cl_flag((m_temp1[i] & 0x0f) + (m_temp2[i] & 0x0f) + carry > 9);
}
int num1 = (m_temp1[i] & 0x0f) + ((m_temp1[i] & 0xf0) >> 4) * 10;
int num2 = (m_temp2[i] & 0x0f) + ((m_temp2[i] & 0xf0) >> 4) * 10;
@ -734,10 +736,12 @@ inline void hcd62121_cpu_device::op_subb(int size)
bool zero_low = true;
u8 carry = 0;
set_cl_flag((m_temp1[size-1] & 0x0f) < (m_temp2[size-1] & 0x0f));
for (int i = 0; i < size; i++)
{
if (i == size - 1) {
set_cl_flag((m_temp1[i] & 0x0f) - (m_temp2[i] & 0x0f) - carry < 0);
}
int num1 = (m_temp1[i] & 0x0f) + ((m_temp1[i] & 0xf0) >> 4) * 10;
int num2 = (m_temp2[i] & 0x0f) + ((m_temp2[i] & 0xf0) >> 4) * 10;
@ -766,8 +770,6 @@ inline void hcd62121_cpu_device::op_sub(int size)
bool zero_low = true;
u8 carry = 0;
set_cl_flag((m_temp1[0] & 0x0f) < (m_temp2[0] & 0x0f));
for (int i = 0; i < size; i++)
{
if (i == size - 1) {