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Diffstat (limited to 'src/devices/bus/nscsi/crd254sh.cpp')
-rw-r--r--src/devices/bus/nscsi/crd254sh.cpp68
1 files changed, 68 insertions, 0 deletions
diff --git a/src/devices/bus/nscsi/crd254sh.cpp b/src/devices/bus/nscsi/crd254sh.cpp
new file mode 100644
index 00000000000..80fc5fae740
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+++ b/src/devices/bus/nscsi/crd254sh.cpp
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+// license:BSD-3-Clause
+// copyright-holders:Olivier Galibert
+/*******************************************************************************
+
+ Skeleton device for Sony/Apple CRD-254SH 4x cdrom reader
+
+*******************************************************************************/
+
+// Chips:
+// - Hitachi H8/3040 : CPU, external rom mode
+// - Sanyo LC89512W : CD-ROM error correction + SCSI
+// - Sanyo LC7868K : DSP for CD players
+// - Sanyo LC98200 : ?
+// - Sanyo LA9220 : Analog signal processing and servo control
+// - Sanyo LC78816W : ?
+// - Sanyo LA6531 : 2-Channel BTL-USE driver
+// - 2x NPN NN514256J-45 : 256Kx4 DRAM
+//
+// The LC89512W combines a LC89517 (cdrom) upgraded for 4x and a LC8945 (scsi)
+// The LC89517 is a LC89515 upgraded for x2 capability
+// The LC89515 is an enhanced LC8951, and is documented
+
+
+#include "emu.h"
+#include "crd254sh.h"
+
+DEFINE_DEVICE_TYPE(CRD254SH, crd254sh_device, "crd254sh", "Sanyo CRD-254SH CD-ROM")
+
+crd254sh_device::crd254sh_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+ : device_t(mconfig, CRD254SH, tag, owner, clock)
+ , nscsi_slot_card_interface(mconfig, *this, "dummy_scsi")
+ , m_mcu(*this, "mcu")
+ , m_scsi(*this, "dummy_scsi")
+ , m_rom(*this, "mcu")
+{
+}
+
+void crd254sh_device::device_start()
+{
+}
+
+void crd254sh_device::mem_map(address_map &map)
+{
+ map(0x00000, 0x0ffff).rom().region("mcu", 0);
+}
+
+void crd254sh_device::io_map(address_map &map)
+{
+}
+
+void crd254sh_device::device_add_mconfig(machine_config &config)
+{
+ H83040(config, m_mcu, 20_MHz_XTAL);
+ m_mcu->set_addrmap(AS_PROGRAM, &crd254sh_device::mem_map);
+ m_mcu->set_addrmap(AS_IO, &crd254sh_device::io_map);
+
+ NCR53C94(config, m_scsi, 25_MHz_XTAL); // Placeholder until we implement the real chip
+}
+
+ROM_START(crd254sh)
+ ROM_REGION(0x10000, "mcu", 0)
+ ROM_LOAD("crd-254s_1.02.bin", 0x00000, 0x10000, CRC(539df5f0) SHA1(edb1f7d96f351ef70b8ade03449fb63e0e0a652b))
+ROM_END
+
+const tiny_rom_entry *crd254sh_device::device_rom_region() const
+{
+ return ROM_NAME(crd254sh);
+}