diff --git a/src/devices/machine/sis7018_audio.cpp b/src/devices/machine/sis7018_audio.cpp
index 8bb6eab06ed..afcbfb13efd 100644
--- a/src/devices/machine/sis7018_audio.cpp
+++ b/src/devices/machine/sis7018_audio.cpp
@@ -6,7 +6,7 @@ SiS 7018 Audio device (AC97 complaint)
 
 TODO:
 - Stub interface, to be improved;
-- Reportedly based off Trident 4DWave technology;
+- Reportedly based off Trident 4DWave technology, some registers effectively matches up;
 
 **************************************************************************************************/
 
@@ -32,7 +32,7 @@ DEFINE_DEVICE_TYPE(SIS7018_AUDIO, sis7018_audio_device, "sis7018_audio", "SiS 70
 
 sis7018_audio_device::sis7018_audio_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
 	: pci_device(mconfig, SIS7018_AUDIO, tag, owner, clock)
-
+	, m_joy(*this, "pc_joy")
 {
 	// 0x040100 - Multimedia device, audio device (vendor specific i/f)
 	// 0x01 - Rev 1
@@ -41,15 +41,29 @@ sis7018_audio_device::sis7018_audio_device(const machine_config &mconfig, const
 
 void sis7018_audio_device::device_add_mconfig(machine_config &config)
 {
-
+	PC_JOY(config, m_joy);
+	// ...
 }
 
+// NOTE: prefer using Trident naming if a register is there too.
 void sis7018_audio_device::config_map(address_map &map)
 {
 	pci_device::config_map(map);
-	// map(0x003e, 0x003f) max latency min=0x02, max=0x18
 
-	map(0x40, 0xe3).rw(FUNC(sis7018_audio_device::unmap_log_r), FUNC(sis7018_audio_device::unmap_log_w));
+	map(0x48, 0xe3).rw(FUNC(sis7018_audio_device::unmap_log_r), FUNC(sis7018_audio_device::unmap_log_w));
+
+	map(0x44, 0x44).lrw8(
+		NAME([this] (offs_t offset) {
+			return m_legacy_io_base;
+		}),
+		NAME([this] (offs_t offset, u8 data) {
+			LOGIO("PCI $44: Legacy I/O base %02x\n", data);
+			m_legacy_io_base = data;
+			remap_cb();
+		})
+	);
+	// 0x45 Legacy DMA Decoding
+	// 0x46 PM_CFG Power Management Config (Legacy Control on Trident)
 
 	// PMC capability identifier
 	map(0xdc, 0xdf).r(FUNC(sis7018_audio_device::pmc_id_r));
@@ -82,19 +96,14 @@ void sis7018_audio_device::io_map(address_map &map)
 
 }
 
-void sis7018_audio_device::map_extra(uint64_t memory_window_start, uint64_t memory_window_end, uint64_t memory_offset, address_space *memory_space,
-							uint64_t io_window_start, uint64_t io_window_end, uint64_t io_offset, address_space *io_space)
-{
-//  io_space->install_device(0, 0x03ff, *this, &sis7018_audio_device::io_map);
-	// TODO: legacy handling, including game port
-}
-
 void sis7018_audio_device::device_start()
 {
 	pci_device::device_start();
 	add_map(256, M_IO, FUNC(sis7018_audio_device::io_map));
 	// not explicitly stated, assume 4096 size from the MEM decoding
 	add_map(4096, M_MEM, FUNC(sis7018_audio_device::memory_map));
+
+	// TODO: PCI regs 0x3e/0x3f max_lat = 0x18, min_gnt = 0x02
 }
 
 
@@ -104,10 +113,38 @@ void sis7018_audio_device::device_reset()
 
 	command = 0x0000;
 	status = 0x0000;
-	// INTB#
-	intr_pin = 2;
+	// INTA#
+	intr_pin = 1;
 	// TODO: can be written to with $46=1
 	subsystem_id = 0x10397018;
+
+	m_legacy_io_base = 0xe2; // 0xf0 on Trident
+	remap_cb();
+}
+
+void sis7018_audio_device::map_extra(uint64_t memory_window_start, uint64_t memory_window_end, uint64_t memory_offset, address_space *memory_space,
+							uint64_t io_window_start, uint64_t io_window_end, uint64_t io_offset, address_space *io_space)
+{
+	// if(BIT(m_legacy_io_base, 7))
+	// const u16 mpu401base_io_addr = 0x300 | (BIT(m_legacy_io_base, 6) ? 0x00 : 0x30);
+
+	if (BIT(m_legacy_io_base, 5))
+	{
+		const u16 gamebase_io_addr = 0x200 | (BIT(m_legacy_io_base, 4) << 3);
+		io_space->install_device(gamebase_io_addr, gamebase_io_addr | 0x7, *this, &sis7018_audio_device::gameport_map);
+	}
+
+	// if(BIT(m_legacy_io_base, 3))
+	// const u16 adlibbase_io_addr = 0x388 | (BIT(m_legacy_io_base, 2) << 2);
+
+	// if(BIT(m_legacy_io_base, 1))
+	// const u16 sbbase_io_addr = 0x200 | (BIT(m_legacy_io_base, 0) ? 0x20 : 0x40);
+}
+
+// 200h / 208h
+void sis7018_audio_device::gameport_map(address_map &map)
+{
+	map(0x00, 0x07).rw(m_joy, FUNC(pc_joy_device::joy_port_r), FUNC(pc_joy_device::joy_port_w));
 }
 
 /*
@@ -116,11 +153,11 @@ void sis7018_audio_device::device_reset()
 
 u8 sis7018_audio_device::unmap_log_r(offs_t offset)
 {
-	LOGTODO("AUDIO Unemulated [%02x] R\n", offset + 0x40);
+	LOGTODO("AUDIO Unemulated [%02x] R\n", offset + 0x48);
 	return 0;
 }
 
 void sis7018_audio_device::unmap_log_w(offs_t offset, u8 data)
 {
-	LOGTODO("AUDIO Unemulated [%02x] %02x W\n", offset + 0x40, data);
+	LOGTODO("AUDIO Unemulated [%02x] %02x W\n", offset + 0x48, data);
 }
diff --git a/src/devices/machine/sis7018_audio.h b/src/devices/machine/sis7018_audio.h
index d72794e05c6..5f50316015f 100644
--- a/src/devices/machine/sis7018_audio.h
+++ b/src/devices/machine/sis7018_audio.h
@@ -8,6 +8,8 @@
 
 #include "pci.h"
 
+#include "bus/pc_joy/pc_joy.h"
+
 class sis7018_audio_device : public pci_device
 {
 public:
@@ -31,14 +33,20 @@ protected:
 	void io_map(address_map &map);
 
 private:
+	required_device<pc_joy_device> m_joy;
+
 	virtual u8 capptr_r() override;
 
+	void gameport_map(address_map &map);
+
 	u32 pmc_id_r();
 //  void pmc_status_r();
 //  u32 pmc_control(offs_t offset, u32 data, u32 mem_mask = ~0);
 
 	u8 unmap_log_r(offs_t offset);
 	void unmap_log_w(offs_t offset, u8 data);
+
+	u8 m_legacy_io_base = 0;
 };
 
 DECLARE_DEVICE_TYPE(SIS7018_AUDIO, sis7018_audio_device)