Add dump and skeleton device for Sony SMO-C501 MO Disk Controller [Don Maslin Vintage Computer Archive]

scripts/src/bus.lua

@@ -2308,6 +2308,8 @@ if (BUSES["NSCSI"]~=null) then
 		MAME_DIR .. "src/devices/bus/nscsi/hd.h",
 		MAME_DIR .. "src/devices/bus/nscsi/s1410.cpp",
 		MAME_DIR .. "src/devices/bus/nscsi/s1410.h",
+		MAME_DIR .. "src/devices/bus/nscsi/smoc501.cpp",
+		MAME_DIR .. "src/devices/bus/nscsi/smoc501.h",
 	}
 end
 

src/devices/bus/nscsi/devices.cpp

@@ -9,6 +9,7 @@
 #include "bus/nscsi/cw7501.h"
 #include "bus/nscsi/hd.h"
 #include "bus/nscsi/s1410.h"
+#include "bus/nscsi/smoc501.h"
 
 void default_scsi_devices(device_slot_interface &device)
 {
@@ -19,4 +20,5 @@ 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("smoc501", SMOC501);
 };

src/devices/bus/nscsi/smoc501.cpp

@@ -0,0 +1,91 @@
+// license:BSD-3-Clause
+// copyright-holders:AJR
+/**********************************************************************
+
+    Sony SMO-C501 Magneto Optical Disk Controller
+
+    This is the SCSI/M-ESDI bridge controller for the SMO-D501 and
+    SMO-E501 MO disk drives.
+
+    The PCB features some ASICs by ADSI.
+
+**********************************************************************/
+
+#include "emu.h"
+#include "smoc501.h"
+
+#include "cpu/nec/v5x.h"
+#include "machine/wd33c9x.h"
+
+DEFINE_DEVICE_TYPE(SMOC501, smoc501_device, "smoc501", "Sony SMO-C501 MO Disk Controller")
+
+smoc501_device::smoc501_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+	: device_t(mconfig, SMOC501, tag, owner, clock)
+	, nscsi_slot_card_interface(mconfig, *this, "scsic")
+{
+}
+
+void smoc501_device::device_start()
+{
+}
+
+
+void smoc501_device::mem_map(address_map &map)
+{
+	map(0x00000, 0x07fff).ram();
+	map(0x0a000, 0x0a01f).rw("scsic", FUNC(wd33c93_device::dir_r), FUNC(wd33c93_device::dir_w));
+	map(0xf0000, 0xfffff).rom().region("microcode", 0);
+}
+
+
+static INPUT_PORTS_START(smoc501)
+	PORT_START("DSW")
+	PORT_DIPNAME(0x80, 0x80, "Loading Control") PORT_DIPLOCATION("DSW:1")
+	PORT_DIPSETTING(0x80, DEF_STR(Off))
+	PORT_DIPSETTING(0x00, DEF_STR(On))
+	PORT_DIPNAME(0x40, 0x40, "Eject Mode") PORT_DIPLOCATION("DSW:2")
+	PORT_DIPSETTING(0x40, "Eject Button")
+	PORT_DIPSETTING(0x00, "Controller")
+	PORT_DIPNAME(0x20, 0x20, "Temporary Mode") PORT_DIPLOCATION("DSW:3")
+	PORT_DIPSETTING(0x00, "512 Bytes/Sector")
+	PORT_DIPSETTING(0x20, "1024 Bytes/Sector")
+	PORT_DIPNAME(0x10, 0x00, "Terminator") PORT_DIPLOCATION("DSW:4")
+	PORT_DIPSETTING(0x10, DEF_STR(Off))
+	PORT_DIPSETTING(0x00, "On (Last Drive)")
+	PORT_DIPNAME(0x08, 0x00, "Auto Spin Up") PORT_DIPLOCATION("DSW:5")
+	PORT_DIPSETTING(0x08, "By Drive Unit")
+	PORT_DIPSETTING(0x00, "By Controller")
+	PORT_DIPNAME(0x07, 0x06, "Drive Number") PORT_DIPLOCATION("DSW:8,7,6")
+	PORT_DIPSETTING(0x07, "0")
+	PORT_DIPSETTING(0x06, "1")
+	PORT_DIPSETTING(0x05, "2")
+	PORT_DIPSETTING(0x04, "3")
+	PORT_DIPSETTING(0x03, "4")
+	PORT_DIPSETTING(0x02, "5")
+	PORT_DIPSETTING(0x01, "6")
+	PORT_DIPSETTING(0x00, "7")
+INPUT_PORTS_END
+
+ioport_constructor smoc501_device::device_input_ports() const
+{
+	return INPUT_PORTS_NAME(smoc501);
+}
+
+void smoc501_device::device_add_mconfig(machine_config &config)
+{
+	v40_device &mpu(V40(config, "mpu", 16'000'000)); // clock is guessed
+	mpu.set_addrmap(AS_PROGRAM, &smoc501_device::mem_map);
+
+	wd33c93_device &scsic(WD33C93(config, "scsic", 10'000'000)); // clock is guessed
+	scsic.irq_cb().set_inputline("mpu", INPUT_LINE_IRQ5);
+}
+
+ROM_START(smoc501)
+	ROM_REGION(0x10000, "microcode", 0)
+	ROM_LOAD("c501-00.rom", 0x00000, 0x10000, CRC(0ae04500) SHA1(96c73a3a2ecdc8c903e920f2afba5b4edd5cdba6))
+ROM_END
+
+const tiny_rom_entry *smoc501_device::device_rom_region() const
+{
+	return ROM_NAME(smoc501);
+}

src/devices/bus/nscsi/smoc501.h

@@ -0,0 +1,30 @@
+// license:BSD-3-Clause
+// copyright-holders:AJR
+
+#ifndef MAME_BUS_NSCSI_SMOC501_H
+#define MAME_BUS_NSCSI_SMOC501_H
+
+#pragma once
+
+#include "machine/nscsi_bus.h"
+
+class smoc501_device : public device_t, public nscsi_slot_card_interface
+{
+public:
+	smoc501_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 ioport_constructor device_input_ports() const 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);
+};
+
+DECLARE_DEVICE_TYPE(SMOC501, smoc501_device)
+
+#endif // MAME_BUS_NSCSI_CDD2000_H