pci/zr36057.cpp: add SAA7110A stub

scripts/src/video.lua

@@ -1112,6 +1112,18 @@ if (VIDEOS["SAA5240"]~=null) then
 	}
 end
 
+--------------------------------------------------
+--
+--@src/devices/video/saa7110.h,VIDEOS["SAA7110"] = true
+--------------------------------------------------
+
+if (VIDEOS["SAA7110"]~=null) then
+	files {
+		MAME_DIR .. "src/devices/video/saa7110.cpp",
+		MAME_DIR .. "src/devices/video/saa7110.h",
+	}
+end
+
 --------------------------------------------------
 --
 --@src/devices/video/sn74s262.h,VIDEOS["SN74S262"] = true

src/devices/bus/pci/zr36057.cpp

@@ -48,6 +48,7 @@ DEFINE_DEVICE_TYPE(ZR36057_PCI, zr36057_device,   "zr36057",   "Zoran ZR36057-ba
 
 zr36057_device::zr36057_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock)
 	: pci_card_device(mconfig, type, tag, owner, clock)
+	, m_decoder(*this, "decoder")
 {
 	// ZR36057PQC Video cutting chipset
 	// device ID reportedly same for ZR36057 and ZR36067, revision 0x02 for latter.
@@ -69,7 +70,17 @@ zr36057_device::zr36057_device(const machine_config &mconfig, const char *tag, d
 
 void zr36057_device::device_add_mconfig(machine_config &config)
 {
+	// 27'000'000 xtal near ZR36060
 
+	SAA7110A(config, m_decoder, XTAL(26'800'000));
+	m_decoder->sda_callback().set([this](int state) { m_decoder_sdao_state = state; });
+
+	// S-Video input/output
+	// composite video input/output
+
+	// video and audio input/output pins on PCB, for cross connection with other boards
+
+	// DC30 combines the two audio input/output as an external jack option
 }
 
 void zr36057_device::device_start()
@@ -199,11 +210,20 @@ void zr36057_device::asr_map(address_map &map)
 		})
 	);
 
-	map(0x044, 0x047).lr32(
+	map(0x044, 0x047).lrw32(
 		NAME([this] (offs_t offset) {
 			LOG("I2C R\n");
 			// avoid win98 stall for now
-			return 0x3;
+			return m_decoder_sdao_state << 1 | 1;
+			//return 3;
+		}),
+		NAME([this] (offs_t offset, u32 data, u32 mem_mask) {
+			//printf("I2C %02x %08x\n", data, mem_mask);
+			if (ACCESSING_BITS_0_7)
+			{
+				m_decoder->sda_write(BIT(data, 1));
+				m_decoder->scl_write(BIT(data, 0));
+			}
 		})
 	);
 }

src/devices/bus/pci/zr36057.h

@@ -7,7 +7,7 @@
 #pragma once
 
 #include "pci_slot.h"
-
+#include "video/saa7110.h"
 
 class zr36057_device : public pci_card_device
 {
@@ -31,9 +31,10 @@ protected:
 	virtual void config_map(address_map &map) override ATTR_COLD;
 
 private:
+	required_device<saa7110a_device> m_decoder;
 	void asr_map(address_map &map) ATTR_COLD;
 
-    void software_reset();
+	void software_reset();
 
 	struct {
 		u32 horizontal_config;
@@ -43,9 +44,11 @@ private:
 	bool m_softreset;
 	u8 m_gpio_ddr, m_pci_waitstate_control;
 
-    struct {
-        u8 time[4];
-    } m_guestbus;
+	struct {
+		u8 time[4];
+	} m_guestbus;
+
+	int m_decoder_sdao_state;
 };
 
 DECLARE_DEVICE_TYPE(ZR36057_PCI, zr36057_device)

src/devices/video/saa7110.cpp

@@ -0,0 +1,38 @@
+// license: BSD-3-Clause
+// copyright-holders: Angelo Salese
+
+#include "emu.h"
+#include "saa7110.h"
+
+#define VERBOSE (1)
+#include "logmacro.h"
+
+DEFINE_DEVICE_TYPE(SAA7110A, saa7110a_device, "saa7110a", "SAA7110A OCF1")
+
+// TODO: pin address overridable with SA pin = 1 (0x9e >> 1)
+saa7110a_device::saa7110a_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+	: device_t(mconfig, SAA7110A, tag, owner, clock)
+	, i2c_hle_interface(mconfig, *this, 0x9c >> 1)
+	//, device_memory_interface(mconfig, *this)
+{}
+
+void saa7110a_device::device_start()
+{
+}
+
+void saa7110a_device::device_reset()
+{
+
+}
+
+u8 saa7110a_device::read_data(u16 offset)
+{
+    //printf("%02x\n", offset);
+	return 0xff;
+}
+
+void saa7110a_device::write_data(u16 offset, u8 data)
+{
+    //printf("%02x %02x\n", offset, data);
+}
+

src/devices/video/saa7110.h

@@ -0,0 +1,33 @@
+// license: BSD-3-Clause
+// copyright-holders: Angelo Salese
+
+#ifndef MAME_VIDEO_SAA7110_H
+#define MAME_VIDEO_SAA7110_H
+
+#pragma once
+
+#include "machine/i2chle.h"
+
+class saa7110a_device :
+	public device_t,
+    public i2c_hle_interface
+//	public device_memory_interface
+{
+public:
+	saa7110a_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+protected:
+// saa7110a_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
+    virtual void device_start() override ATTR_COLD;
+    virtual void device_reset() override ATTR_COLD;
+
+//  virtual space_config_vector memory_space_config() const override;
+    virtual u8 read_data(u16 offset) override;
+    virtual void write_data(u16 offset, u8 data) override;
+
+};
+
+DECLARE_DEVICE_TYPE(SAA7110A, saa7110a_device)
+//DECLARE_DEVICE_TYPE(SAA7110, saa7110_device)
+
+#endif // MAME_VIDEO_SAA7110_H

src/emu/xtal.cpp

@@ -388,10 +388,11 @@ const double XTAL::known_xtals[] = {
 	 26'666'666, // 26.666666_MHz_XTAL     Irem M92 but most use 27MHz
 	 26'670'000, // 26.670_MHz_XTAL        Namco EVA
 	 26'686'000, // 26.686_MHz_XTAL        Typically used on 90's Taito PCBs to drive the custom chips
+	 26'800'000, // 26.8_MHz_XTAL          SAA7110 TV decoder
 	 26'824'000, // 26.824_MHz_XTAL        Astro Corp.'s Zoo
 	 26'880'000, // 26.88_MHz_XTAL         Roland RF5C36/SA-16 clock (30000 * 896)
 	 26'989'200, // 26.9892_MHz_XTAL       TeleVideo 965
-	 27'000'000, // 27_MHz_XTAL            Some Banpresto games macrossp, Irem M92 and 90's Toaplan games
+	 27'000'000, // 27_MHz_XTAL            Some Banpresto games macrossp, Irem M92 and 90's Toaplan games, Pinnacle Zoran based PCI cards
 	 27'164'000, // 27.164_MHz_XTAL        Typically used on 90's Taito PCBs to drive the custom chips
 	 27'210'900, // 27.2109_MHz_XTAL       LA Girl
 	 27'562'000, // 27.562_MHz_XTAL        Visual 220