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diff --git a/src/devices/bus/nscsi/applecd.cpp b/src/devices/bus/nscsi/applecd.cpp
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+// license:BSD-3-Clause
+// copyright-holders:AJR
+/*******************************************************************************
+
+ Skeleton device for Apple external CD-ROM drives.
+
+ PCB: 1-631-957-15
+
+ Microcontrollers:
+ - Intel S80C31-1
+ - Mitsubishi M37450M8-452FP © SONY '91
+
+ Memories:
+ - National NMC27C256Q (or BQ) 32,768x8 EEPROM (for 80C31)
+ - Sony CXK5864BM-12L 8,192x8 Static RAM (x2)
+ (one near EEPROM, one between LC8951 and M37450M8)
+ - Fujitsu MB81464-12 65,536x4 Dynamic RAM (x2: for CXD1184)
+ - Fujitsu MB81C79A-45 8,192x9 Static RAM (for LC8951)
+ - Sony CXK5816MS-12L 2,048x8 Static RAM (near CXD1135)
+
+ Other major digital ICs:
+ - Sony CXD1180AQ SCSI Controller
+ - Sony CXD1184Q
+ - Sanyo LC8951 CD-ROM Error Correction & Host Interface Processor
+ - Sony CXD1135Q
+
+ Linear ICs:
+ - Toshiba TC9154AP Dual Volume Control
+ - Burr-Brown PCM67U Dual Audio DAC
+ - Sony CXA1182Q-Z CD Servo Signal Processor
+ - Sony CXA1081M
+ - Toshiba TA8406P Dual Power Operational Amplifier (x3)
+
+ XTALs: 12A KSS2A (80C31?), 20A KSS2A (CXD1184), D167 (LC8951?)
+
+*******************************************************************************/
+
+#include "emu.h"
+#include "applecd.h"
+
+#include "cpu/mcs51/mcs51.h"
+#include "cpu/m6502/m3745x.h"
+#include "machine/ncr5380.h"
+
+DEFINE_DEVICE_TYPE(APPLECD150, applecd150_device, "aplcd150", "AppleCD 150")
+
+applecd150_device::applecd150_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+ : device_t(mconfig, APPLECD150, tag, owner, clock)
+ , nscsi_slot_card_interface(mconfig, *this, "scsic")
+{
+}
+
+void applecd150_device::device_start()
+{
+}
+
+void applecd150_device::prog_map(address_map &map)
+{
+ map(0x0000, 0x7fff).rom().region("eeprom", 0);
+}
+
+void applecd150_device::ext_map(address_map &map)
+{
+ map(0xc020, 0xc027).m("scsic", FUNC(cxd1180_device::map));
+}
+
+void applecd150_device::device_add_mconfig(machine_config &config)
+{
+ i80c31_device &mcu1(I80C31(config, "mcu1", 12_MHz_XTAL));
+ mcu1.set_addrmap(AS_PROGRAM, &applecd150_device::prog_map);
+ mcu1.set_addrmap(AS_IO, &applecd150_device::ext_map);
+
+ M37450(config, "mcu2", 16.9344_MHz_XTAL / 2).set_disable();
+
+ CXD1180(config, "scsic").irq_handler().set_inputline("mcu1", MCS51_INT1_LINE);
+
+ //LC8951(config, "cdintf", 16.9344_MHz_XTAL);
+}
+
+ROM_START(aplcd150)
+ ROM_REGION(0x8000, "eeprom", 0)
+ ROM_LOAD("apl_1.8g_1289.ic303", 0x0000, 0x8000, CRC(54ebf81f) SHA1(e4cd656e2a433229543e874a29f1567758170fc6))
+
+ ROM_REGION(0x4000, "mcu2", 0)
+ ROM_LOAD("m37450m8-452fp.ic201", 0x0000, 0x4000, NO_DUMP)
+ROM_END
+
+const tiny_rom_entry *applecd150_device::device_rom_region() const
+{
+ return ROM_NAME(aplcd150);
+}
+