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wd33c9x - clarify hardware reset

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Hardware reset triggers a SCSI_STATUS_RESET interrupt when the MR signal is asserted, but this is also true when the device first powers on.
Move the interrupt generation to device_reset so all hardware resets trigger the interrupt.
This commit is contained in:
tyfighter 2019-08-09 21:06:52 -05:00
parent 88e9c67917
commit 37c3d87807
1 changed files with 6 additions and 6 deletions
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12
src/devices/machine/wd33c9x.cpp
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@ -415,6 +415,8 @@ void wd33c9x_base_device::device_start()
void wd33c9x_base_device::device_reset() void wd33c9x_base_device::device_reset()
{ {
// This is a hardware reset. Software reset is handled
// under COMMAND_CC_RESET.
scsi_bus->ctrl_w(scsi_refid, 0, S_ALL); scsi_bus->ctrl_w(scsi_refid, 0, S_ALL);
scsi_bus->ctrl_wait(scsi_refid, S_SEL|S_BSY|S_RST, S_ALL); scsi_bus->ctrl_wait(scsi_refid, S_SEL|S_BSY|S_RST, S_ALL);
m_addr = 0; m_addr = 0;
@ -433,6 +435,10 @@ void wd33c9x_base_device::device_reset()
m_irq_cb(CLEAR_LINE); m_irq_cb(CLEAR_LINE);
m_drq_cb(CLEAR_LINE); m_drq_cb(CLEAR_LINE);
m_drq_state = false; m_drq_state = false;
// Hardware reset triggers a SCSI_STATUS_RESET interrupt.
irq_fifo_push(SCSI_STATUS_RESET);
update_irq();
} }
@ -668,13 +674,7 @@ WRITE_LINE_MEMBER(wd33c9x_base_device::reset_w)
{ {
if (state) { if (state) {
LOGMASKED(LOG_LINES, "Reset via MR line\n"); LOGMASKED(LOG_LINES, "Reset via MR line\n");
// FIXME: hardware reset is not the same as software reset, and
// wd33c93a behaves differently to wd33c93
device_reset(); device_reset();
// hardware reset produces an interrupt
m_regs[AUXILIARY_STATUS] |= AUXILIARY_STATUS_INT;
m_irq_cb(ASSERT_LINE);
} }
} }