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i8089: fix sintr (nw)

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This commit is contained in:
cracyc 2017-09-26 08:46:12 -05:00
parent 4139b8fd7e
commit f9705aa35d
1 changed files with 3 additions and 3 deletions
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6
src/devices/cpu/i8089/i8089_channel.cpp
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@ -685,16 +685,16 @@ void i8089_channel_device::examine_ccw(uint8_t ccw)
m_r[PSW].w = (m_r[PSW].w & 0x5f) | (ccw & 0xa0);
// acknowledge interrupt
if (BIT(ccw, 4))
if (BIT(ccw, 3))
{
m_write_sintr(0);
m_r[PSW].w &= ~(1 << 5);
}
// interrupt enable
if (BIT(ccw, 5))
if (BIT(ccw, 4))
{
if (BIT(ccw, 4))
if (BIT(ccw, 3))
m_r[PSW].w &= ~(1 << 4);
else
m_r[PSW].w |= 1 << 4;