cdu75s: start the driver

scripts/src/bus.lua

@@ -2503,6 +2503,8 @@ if (BUSES["NSCSI"]~=null) then
 		MAME_DIR .. "src/devices/bus/nscsi/cdd2000.h",
 		MAME_DIR .. "src/devices/bus/nscsi/cdrn820s.cpp",
 		MAME_DIR .. "src/devices/bus/nscsi/cdrn820s.h",
+		MAME_DIR .. "src/devices/bus/nscsi/cdu75s.cpp",
+		MAME_DIR .. "src/devices/bus/nscsi/cdu75s.h",
 		MAME_DIR .. "src/devices/bus/nscsi/cw7501.cpp",
 		MAME_DIR .. "src/devices/bus/nscsi/cw7501.h",
 		MAME_DIR .. "src/devices/bus/nscsi/devices.cpp",

src/devices/bus/nscsi/cdu75s.cpp

@@ -0,0 +1,88 @@
+// license:BSD-3-Clause
+// copyright-holders:AJR
+/*******************************************************************************
+
+    Skeleton device for Sony/Apple CDU75S 2x cdrom reader
+
+*******************************************************************************/
+
+// Chips:
+// - IC101: CXA1841Q       - ? probably something related to audio
+// - IC102: CXA1182Q-Z     - servo control
+// - IC103: CXD2510Q       - CD DSP
+// - IC105: BU4053BCF      - analog mux/demux
+// - IC201: H8/3032        - main mcu, 64k internal rom
+// - IC202: CXD1808AQ      - cdrom decoder
+// - IC203: LH62800K-60    - DRAM 256k*8
+// - IC204: FAS204 2405027 - Fast Architecture SCSI 204, ncr 53c94 compatible
+// - IC205: CXD8532Q       - ? probable logic/processing
+// - IC301: pcm-1715u      - DAC
+// - IC401: BA6295AFP      - 2 channel motor driver
+
+#include "emu.h"
+#include "cdu75s.h"
+
+DEFINE_DEVICE_TYPE(CDU75S, cdu75s_device, "cdu75s", "Philips CDU75S CD-R")
+
+cdu75s_device::cdu75s_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+	: device_t(mconfig, CDU75S, tag, owner, clock)
+	, nscsi_slot_card_interface(mconfig, *this, "fas204")
+	, m_mcu(*this, "mcu")
+	, m_scsi(*this, "fas204")
+	, m_rom(*this, "mcu")
+{
+}
+
+void cdu75s_device::device_start()
+{
+	// We're getting interesting results with a basic vectors map,
+	// e.g. vector<n> points to 0x10000+4*n, where there's a jmp to
+	// the final destination
+
+	for(u32 i = 0; i != 64; i++) {
+		m_rom[i*2] = 1;
+		m_rom[i*2+1] = i*4;
+	}
+}
+
+void cdu75s_device::mem_map(address_map &map)
+{
+	map(0x00000, 0x1ffff).rom().region("mcu", 0);
+	map(0x40000, 0x4000f).m(m_scsi, FUNC(ncr53c94_device::map));
+
+	map(0x60000, 0x60007); // General i/o?
+	map(0x60005, 0x60005).r(FUNC(cdu75s_device::jumpers_r));
+
+	map(0xc0000, 0xc003f); // CXD1808AQ
+}
+
+void cdu75s_device::io_map(address_map &map)
+{
+}
+
+void cdu75s_device::device_add_mconfig(machine_config &config)
+{
+	H83032(config, m_mcu, 33.8688_MHz_XTAL/2);
+	m_mcu->set_addrmap(AS_PROGRAM, &cdu75s_device::mem_map);
+	m_mcu->set_addrmap(AS_IO, &cdu75s_device::io_map);
+
+	NCR53C94(config, m_scsi, 25'000'000); // FAS204, compatible
+}
+
+ROM_START(cdu75s)
+	ROM_REGION(0x20000, "mcu", 0)
+	ROM_FILL(0x00000, 0x10000, 0x00) // Internal rom not yet dumped
+	ROM_LOAD("cdu-75s_1.0j_95.03.14_apple.bin", 0x10000, 0x10000, CRC(f4ad4d48) SHA1(7d674116304bc6948fe4a52d9859b4eb5d40b914))
+ROM_END
+
+const tiny_rom_entry *cdu75s_device::device_rom_region() const
+{
+	return ROM_NAME(cdu75s);
+}
+
+u8 cdu75s_device::jumpers_r()
+{
+	u32 jumpers_id = strtol(owner()->basetag(), nullptr, 16);
+	return (jumpers_id ^ 7) << 1;
+}
+

src/devices/bus/nscsi/cdu75s.h

@@ -0,0 +1,38 @@
+// license:BSD-3-Clause
+// copyright-holders:O. Galibert
+
+#ifndef MAME_BUS_NSCSI_CDU75S_H
+#define MAME_BUS_NSCSI_CDU75S_H
+
+#pragma once
+
+#include "machine/nscsi_bus.h"
+#include "cpu/h8/h83032.h"
+#include "machine/ncr5390.h"
+
+class cdu75s_device : public device_t, public nscsi_slot_card_interface
+{
+public:
+	cdu75s_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
+
+	static constexpr feature_type unemulated_features() { return feature::DISK; }
+
+protected:
+	virtual void device_start() override;
+	virtual void device_add_mconfig(machine_config &config) override;
+	virtual const tiny_rom_entry *device_rom_region() const override;
+
+private:
+	void mem_map(address_map &map);
+	void io_map(address_map &map);
+
+	required_device<h83032_device> m_mcu;
+	required_device<ncr53c94_device> m_scsi;
+	required_region_ptr<u16> m_rom;
+
+	u8 jumpers_r();
+};
+
+DECLARE_DEVICE_TYPE(CDU75S, cdu75s_device)
+
+#endif // MAME_BUS_NSCSI_CDU75S_H

src/devices/bus/nscsi/devices.cpp

@@ -7,6 +7,7 @@
 #include "bus/nscsi/cd.h"
 #include "bus/nscsi/cdd2000.h"
 #include "bus/nscsi/cdrn820s.h"
+#include "bus/nscsi/cdu75s.h"
 #include "bus/nscsi/cw7501.h"
 #include "bus/nscsi/hd.h"
 #include "bus/nscsi/s1410.h"
@@ -21,6 +22,7 @@ void default_scsi_devices(device_slot_interface &device)
 	device.option_add("cdr4210", CDR4210);
 	device.option_add("cdrn820s", CDRN820S);
 	device.option_add("cdd2000", CDD2000);
+	device.option_add("cdu75s", CDU75S);
 	device.option_add("smoc501", SMOC501);
 	device.option_add("aplcd150", APPLECD150);
 };