bus/a2bus/ibsap2.cpp: Add reset_from_bus

Author: ajrhacker

src/devices/bus/a2bus/ibsap2.cpp

@@ -38,6 +38,7 @@ class ibsap2_device : public device_t, public device_a2bus_card_interface
 	virtual u8 read_cnxx(u8 offset) override;
 	virtual u8 read_c800(u16 offset) override;
 	virtual bool take_c800() const override;
+	virtual void reset_from_bus() override;
 
 private:
 	// miscellaneous handlers
@@ -99,6 +100,11 @@ bool ibsap2_device::take_c800() const
 	return true;
 }
 
+void ibsap2_device::reset_from_bus()
+{
+	m_acia->reset();
+}
+
 void ibsap2_device::acia_irq_w(int state)
 {
 	if (state == ASSERT_LINE)