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sm510: ADX don't carry if adding 10(probably for bcd correction)

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This commit is contained in:
hap 2016-04-02 16:54:39 +02:00
parent a811db6ea1
commit 18a7251918
1 changed files with 4 additions and 4 deletions
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8
src/devices/cpu/sm510/sm510op.cpp
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@ -68,8 +68,8 @@ void sm510_base_device::op_lb()
switch (m_bl) switch (m_bl)
{ {
case 0: hi = 0; break; case 0: hi = 0; break;
case 1: hi = 0; break; case 1: hi = 3; break;
case 2: hi = 0; break; case 2: hi = 3; break;
case 3: hi = 3; break; case 3: hi = 3; break;
} }
m_bl |= (hi << 2 & 0xc); m_bl |= (hi << 2 & 0xc);
@ -290,9 +290,9 @@ void sm510_base_device::op_add11()
void sm510_base_device::op_adx() void sm510_base_device::op_adx()
{ {
// ADX x: add immediate value to ACC, skip next on carry // ADX x: add immediate value to ACC, skip next on carry except if x = 10
m_acc += (m_op & 0xf); m_acc += (m_op & 0xf);
m_skip = ((m_acc & 0x10) != 0); m_skip = ((m_op & 0xf) != 10 && (m_acc & 0x10) != 0);
m_acc &= 0xf; m_acc &= 0xf;
} }