:(

src/mame/sinclair/sprinter.cpp

@@ -80,6 +80,7 @@ class sprinter_state : public spectrum_128_state
 		: spectrum_128_state(mconfig, type, tag)
 		, m_maincpu(*this, "maincpu")
 		, m_isa(*this, "isa%u", 0U)
+		, m_isa_io_view(*this, "isa_io_view")
 		, m_rtc(*this, "rtc")
 		, m_ata(*this, "ata%u", 1U)
 		, m_beta(*this, BETA_DISK_TAG)
@@ -113,6 +114,7 @@ class sprinter_state : public spectrum_128_state
 	void map_io(address_map &map) ATTR_COLD;
 	void map_mem(address_map &map) ATTR_COLD;
 	void map_fetch(address_map &map) ATTR_COLD;
+	void map_isa_io(address_map &map) ATTR_COLD;
 	u8 m1_r(offs_t offset);
 	void cio_dtrb_w(int state);
 	u8 joy_ctrl_r(int num);
@@ -139,6 +141,7 @@ class sprinter_state : public spectrum_128_state
 
 	required_device<z84c015_device> m_maincpu;
 	required_device_array<isa8_device, 2> m_isa;
+	memory_view m_isa_io_view;
 
 private:
 	enum accel_state : u8
@@ -1396,8 +1399,19 @@ void sprinter_state::init_taps()
 	});
 }
 
+void sprinter_state::map_isa_io(address_map &map)
+{
+	map.unmap_value_high();
+	map(0x0000, 0xffff).view(m_isa_io_view);
+	subdevice<zxbus_device>("zxbus")->set_io_space(m_isa_io_view[0], m_isa_io_view[0]);
+	m_isa_io_view.select(0);
+}
+
 void sprinter_state::machine_start()
 {
+	address_space &m_isa_io = m_isa[0]->space(isa8_device::AS_ISA_IO);
+	m_isa_io.install_device(0x0000, 0xffff, *this, &sprinter_state::map_isa_io);
+
 	m_isa[0]->space(isa8_device::AS_ISA_IO).unmap_value_high();
 	m_isa[1]->space(isa8_device::AS_ISA_IO).unmap_value_high();
 
@@ -1894,7 +1908,6 @@ void sprinter_state::sprinter(machine_config &config)
 	ISA8(config, m_isa[0], X_SP / 5);
 	m_isa[0]->set_custom_spaces();
 	zxbus_device &zxbus(ZXBUS(config, "zxbus", 0));
-	//zxbus.set_iospace(m_isa[0], isa8_device::AS_ISA_IO);
 	ZXBUS_SLOT(config, "zxbus2isa", 0, zxbus, zxbus_cards, nullptr);
 
 	ISA8(config, m_isa[1], X_SP / 5);