Add skeleton ISA device for Novell Disk Coprocessor Board [modem7, minuszerodegrees.net]

scripts/src/bus.lua

@@ -1316,6 +1316,8 @@ if (BUSES["ISA"]~=null) then
 		MAME_DIR .. "src/devices/bus/isa/np600.h",
 		MAME_DIR .. "src/devices/bus/isa/bt54x.cpp",
 		MAME_DIR .. "src/devices/bus/isa/bt54x.h",
+		MAME_DIR .. "src/devices/bus/isa/dcb.cpp",
+		MAME_DIR .. "src/devices/bus/isa/dcb.h",
 	}
 end
 

src/devices/bus/isa/dcb.cpp

@@ -0,0 +1,70 @@
+// license:BSD-3-Clause
+// copyright-holders:AJR
+/***************************************************************************
+
+    Novell Disk Coprocessor Board (DCB)
+
+    This special SCSI host adapter, later acquired by ADIC, was designed
+    for use with Novell NetWare.
+
+***************************************************************************/
+
+#include "emu.h"
+#include "dcb.h"
+
+DEFINE_DEVICE_TYPE(NOVELL_DCB, novell_dcb_device, "novell_dcb", "Novell Disk Coprocessor Board (#738-133-001)")
+
+novell_dcb_device::novell_dcb_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+	: device_t(mconfig, NOVELL_DCB, tag, owner, clock)
+	, device_isa16_card_interface(mconfig, *this)
+	, m_localcpu(*this, "localcpu")
+	, m_eeprom(*this, "eeprom")
+{
+}
+
+void novell_dcb_device::device_start()
+{
+}
+
+void novell_dcb_device::eeprom_w(u8 data)
+{
+	m_eeprom->cs_write(BIT(data, 5));
+	m_eeprom->clk_write(BIT(data, 6));
+	m_eeprom->di_write(BIT(data, 7));
+}
+
+u8 novell_dcb_device::misc_r()
+{
+	return m_eeprom->do_read() << 7;
+}
+
+void novell_dcb_device::mem_map(address_map &map)
+{
+	map(0x00000, 0x03fff).ram();
+	map(0xfe000, 0xfffff).rom().region("localcpu", 0);
+}
+
+void novell_dcb_device::io_map(address_map &map)
+{
+	map(0x0100, 0x0100).w(FUNC(novell_dcb_device::eeprom_w));
+	map(0x0180, 0x0180).r(FUNC(novell_dcb_device::misc_r));
+}
+
+void novell_dcb_device::device_add_mconfig(machine_config &config)
+{
+	I80188(config, m_localcpu, 16_MHz_XTAL);
+	m_localcpu->set_addrmap(AS_PROGRAM, &novell_dcb_device::mem_map);
+	m_localcpu->set_addrmap(AS_IO, &novell_dcb_device::io_map);
+
+	EEPROM_93C06_16BIT(config, m_eeprom); // NMC9306
+}
+
+ROM_START(novell_dcb)
+	ROM_REGION(0x2000, "localcpu", 0)
+	ROM_LOAD("817-186-001_rev_e.bin", 0x0000, 0x2000, CRC(2e2037f4) SHA1(a13c0aab46084a0805256f1d2b8b8beaccc9e253))
+ROM_END
+
+const tiny_rom_entry *novell_dcb_device::device_rom_region() const
+{
+	return ROM_NAME(novell_dcb);
+}

src/devices/bus/isa/dcb.h

@@ -0,0 +1,43 @@
+// license:BSD-3-Clause
+// copyright-holders:AJR
+/***************************************************************************
+
+    Novell Disk Coprocessor Board (DCB)
+
+***************************************************************************/
+
+#ifndef MAME_BUS_ISA_DCB_H
+#define MAME_BUS_ISA_DCB_H
+
+#pragma once
+
+#include "isa.h"
+#include "cpu/i86/i186.h"
+#include "machine/eepromser.h"
+
+class novell_dcb_device : public device_t, public device_isa16_card_interface
+{
+public:
+	novell_dcb_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_add_mconfig(machine_config &config) override;
+	virtual const tiny_rom_entry *device_rom_region() const override;
+	virtual void device_start() override;
+
+private:
+	void eeprom_w(u8 data);
+	u8 misc_r();
+
+	void mem_map(address_map &map);
+	void io_map(address_map &map);
+
+	required_device<i80188_cpu_device> m_localcpu;
+	required_device<eeprom_serial_93cxx_device> m_eeprom;
+};
+
+DECLARE_DEVICE_TYPE(NOVELL_DCB, novell_dcb_device)
+
+#endif // MAME_BUS_ISA_DCB_H

src/devices/bus/isa/isa_cards.cpp

@@ -40,6 +40,7 @@
 #include "lbaenhancer.h"
 #include "cl_sh260.h"
 #include "bt54x.h"
+#include "dcb.h"
 
 // sound
 #include "adlib.h"
@@ -183,4 +184,5 @@ void pc_isa16_cards(device_slot_interface &device)
 	device.option_add("ev346", EV346);
 	device.option_add("jc1310", JC1310);
 	device.option_add("bt545s", BT545S);
+	device.option_add("dcb", NOVELL_DCB);
 }