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aic6250: minor fixes (nw)

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* clear REQ flag after asserting ACK
* check for possibly unmasked interrupts
This commit is contained in:
Patrick Mackinlay 2018-11-20 18:39:42 +07:00
parent c91fdfe962
commit 9d6a17633e
1 changed files with 14 additions and 0 deletions
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14
src/devices/machine/aic6250.cpp
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@ -302,6 +302,8 @@ void aic6250_device::int_msk_reg_0_w(u8 data)
}
m_int_msk_reg_0 = data;
int_check();
}
void aic6250_device::offset_cntrl_w(u8 data)
@ -373,6 +375,8 @@ void aic6250_device::int_msk_reg_1_w(u8 data)
m_status_reg_0 &= ~R07R_BUS_FREE_DETECT;
m_int_msk_reg_1 = data;
int_check();
}
u8 aic6250_device::status_reg_0_r()
@ -488,6 +492,9 @@ void aic6250_device::scsi_signal_reg_w(u8 data)
if (!(m_control_reg_0 & R07W_TARGET_MODE) && phase_match(data, scsi_bus->ctrl_r()))
m_status_reg_0 &= ~R07R_PHASE_MISMATCH_ERR;
if (!(m_control_reg_0 & R07W_TARGET_MODE) && (data & R09W_SCSI_ACK_OUT))
m_status_reg_0 &= ~R07R_SCSI_REQ_ON;
m_scsi_signal_reg = data;
// HACK: trigger check for phase match
@ -774,6 +781,7 @@ int aic6250_device::state_step()
u8 const data = scsi_bus->data_r();
LOGMASKED(LOG_STATE, "dma in 0x%02x\n", data);
m_status_reg_0 &= ~R07R_SCSI_REQ_ON;
m_dma_count--;
m_fifo.enqueue(data);
@ -827,6 +835,7 @@ int aic6250_device::state_step()
u8 const data = m_fifo.dequeue();
LOGMASKED(LOG_STATE, "dma out 0x%02x\n", data);
m_status_reg_0 &= ~R07R_SCSI_REQ_ON;
m_dma_count--;
m_state = DMA_OUT_NEXT;
@ -879,13 +888,18 @@ int aic6250_device::state_step()
case AUTO_PIO_IN:
m_state = AUTO_PIO_DONE;
m_status_reg_0 &= ~R07R_SCSI_REQ_ON;
m_scsi_latch_data = scsi_bus->data_r();
LOGMASKED(LOG_STATE, "auto pio in 0x%02x\n", m_scsi_latch_data);
scsi_bus->ctrl_w(scsi_refid, S_ACK, S_ACK);
break;
case AUTO_PIO_OUT:
LOGMASKED(LOG_STATE, "auto pio out 0x%02x\n", m_scsi_id_data);
m_status_reg_0 &= ~R07R_SCSI_REQ_ON;
m_state = AUTO_PIO_DONE;
scsi_bus->data_w(scsi_refid, m_scsi_id_data);