Add skeleton BusLogic BT-545S SCSI host adapter device [modem7, minuszerodegrees.net]

scripts/src/bus.lua

@@ -1300,6 +1300,8 @@ if (BUSES["ISA"]~=null) then
 		MAME_DIR .. "src/devices/bus/isa/lbaenhancer.h",
 		MAME_DIR .. "src/devices/bus/isa/np600.cpp",
 		MAME_DIR .. "src/devices/bus/isa/np600.h",
+		MAME_DIR .. "src/devices/bus/isa/bt54x.cpp",
+		MAME_DIR .. "src/devices/bus/isa/bt54x.h",
 	}
 end
 

src/devices/bus/isa/bt54x.cpp

@@ -0,0 +1,102 @@
+// license:BSD-3-Clause
+// copyright-holders:AJR
+/***************************************************************************
+
+    BusTek/BusLogic BT-54x series PC/AT SCSI host adapters
+
+    The earlier version of the BT-542B, with BusTek labels, has a NCR 86C05
+    bus controller where a later version has the 80C20 ASIC instead. It is
+    believed that these chips are largely compatible with each other, as
+    are the NCR 53CF94 and Emulex FAS216 SCSI controllers.
+
+***************************************************************************/
+
+#include "emu.h"
+#include "bt54x.h"
+
+#include "machine/ncr5390.h"
+//#include "machine/ncr86c05.h"
+#include "machine/nscsi_cd.h"
+#include "machine/nscsi_hd.h"
+
+DEFINE_DEVICE_TYPE(BT545S, bt545s_device, "bt545s", "BusLogic BT-545S Fast SCSI Host Adapter")
+
+bt545s_device::bt545s_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
+	: device_t(mconfig, BT545S, tag, owner, clock)
+	, device_isa16_card_interface(mconfig, *this)
+	, m_mpu(*this, "mpu")
+	, m_fdc(*this, "fdc")
+	, m_bios(*this, "bios")
+{
+}
+
+void bt545s_device::device_start()
+{
+}
+
+u8 bt545s_device::local_status_r()
+{
+	return 0;
+}
+
+void bt545s_device::local_map(address_map &map)
+{
+	map(0x00000, 0x01fff).ram();
+	//map(0x02000, 0x0201f).rw("busintf", FUNC(ncr86c05_device::local_read), FUNC(ncr86c05_device::local_write));
+	map(0x02080, 0x0208f).m("scsi:7:fsc", FUNC(ncr53cf94_device::map));
+	map(0x02180, 0x02180).r(FUNC(bt545s_device::local_status_r));
+	map(0xf8000, 0xfffff).rom().region("mpu", 0);
+}
+
+static void fast_scsi_devices(device_slot_interface &device)
+{
+	// FIXME: these device options are placeholders
+	device.option_add("cdrom", NSCSI_CDROM);
+	device.option_add("harddisk", NSCSI_HARDDISK);
+	device.option_add_internal("fsc", NCR53CF94); // FAS216
+}
+
+void bt545s_device::fsc_config(device_t *device)
+{
+	ncr53cf94_device &fsc = downcast<ncr53cf94_device &>(*device);
+
+	fsc.set_clock(40_MHz_XTAL);
+
+	fsc.irq_handler_cb().set(m_mpu, FUNC(i80188_cpu_device::int0_w)); // mostly polled
+	//fsc.drq_handler_cb().set("busintf", FUNC(ncr86c05_device::dma_req_w));
+}
+
+void bt545s_device::device_add_mconfig(machine_config &config)
+{
+	I80188(config, m_mpu, 40_MHz_XTAL / 2); // SAB80188-1-N; clock guessed
+	m_mpu->set_addrmap(AS_PROGRAM, &bt545s_device::local_map);
+
+	//ncr86c05_device &busintf(NCR86C05(config, "busintf", 0));
+	//busintf.mint_callback().set(m_mpu, FUNC(i80188_cpu_device::int1_w));
+	//busintf.dma_ack_callback().set("scsi:7:fsc", FUNC(ncr53cf94_device::dma_w));
+
+	NSCSI_BUS(config, "scsi");
+	NSCSI_CONNECTOR(config, "scsi:0", fast_scsi_devices, nullptr);
+	NSCSI_CONNECTOR(config, "scsi:1", fast_scsi_devices, nullptr);
+	NSCSI_CONNECTOR(config, "scsi:2", fast_scsi_devices, nullptr);
+	NSCSI_CONNECTOR(config, "scsi:3", fast_scsi_devices, nullptr);
+	NSCSI_CONNECTOR(config, "scsi:4", fast_scsi_devices, nullptr);
+	NSCSI_CONNECTOR(config, "scsi:5", fast_scsi_devices, nullptr);
+	NSCSI_CONNECTOR(config, "scsi:6", fast_scsi_devices, nullptr);
+	NSCSI_CONNECTOR(config, "scsi:7", fast_scsi_devices, "fsc", true).set_option_machine_config("fsc", [this] (device_t *device) { fsc_config(device); });
+
+	PC8477A(config, m_fdc, 24_MHz_XTAL); // actually PC8477BV
+}
+
+ROM_START(bt545s)
+	ROM_REGION(0x4000, "bios", 0) // "(C) Copyright 1992     BIOS Version 4.50"
+	ROM_LOAD("u15_27128_5002026-4.50.bin", 0x0000, 0x4000, CRC(1bd3247b) SHA1(9d46a99f4b3057e94ef422f387218de2c4553c1a))
+
+	ROM_REGION(0x8000, "mpu", 0) // "(C) Copyright 1992 BusLogic Inc.      542BH92/10/05"
+	ROM_LOAD("u2_27256_5002005-3.31.bin", 0x0000, 0x8000, CRC(20473714) SHA1(797a8dba182049949f7a5c14d8bef4b4e908305b))
+ROM_END
+
+const tiny_rom_entry *bt545s_device::device_rom_region() const
+{
+	return ROM_NAME(bt545s);
+}

src/devices/bus/isa/bt54x.h

@@ -0,0 +1,43 @@
+// license:BSD-3-Clause
+// copyright-holders:AJR
+/***************************************************************************
+
+    BusTek/BusLogic BT-54x series PC/AT SCSI host adapters
+
+***************************************************************************/
+
+#ifndef MAME_BUS_ISA_BT54X_H
+#define MAME_BUS_ISA_BT54X_H
+
+#pragma once
+
+#include "isa.h"
+#include "cpu/i86/i186.h"
+#include "machine/upd765.h"
+
+class bt545s_device : public device_t, public device_isa16_card_interface
+{
+public:
+	bt545s_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:
+	u8 local_status_r();
+
+	void local_map(address_map &map);
+	void fsc_config(device_t *device);
+
+	required_device<i80188_cpu_device> m_mpu;
+	required_device<upd765_family_device> m_fdc;
+	required_region_ptr<u8> m_bios;
+};
+
+DECLARE_DEVICE_TYPE(BT545S, bt545s_device)
+
+#endif // MAME_BUS_ISA_BT54X_H

src/devices/bus/isa/isa_cards.cpp

@@ -37,6 +37,7 @@
 #include "mcd.h"
 #include "lbaenhancer.h"
 #include "cl_sh260.h"
+#include "bt54x.h"
 
 // sound
 #include "adlib.h"
@@ -173,4 +174,5 @@ void pc_isa16_cards(device_slot_interface &device)
 	device.option_add("wd1007a", WD1007A);
 	device.option_add("ev346", EV346);
 	device.option_add("jc1310", JC1310);
+	device.option_add("bt545s", BT545S);
 }

src/devices/machine/ncr5390.cpp

@@ -20,9 +20,10 @@
 
 #define DELAY_HACK
 
-DEFINE_DEVICE_TYPE(NCR5390, ncr5390_device, "ncr5390", "NCR 5390 SCSI")
+DEFINE_DEVICE_TYPE(NCR5390, ncr5390_device, "ncr5390", "NCR 5390 SCSI Controller")
-DEFINE_DEVICE_TYPE(NCR53C90A, ncr53c90a_device, "ncr53c90a", "NCR 53C90A SCSI")
+DEFINE_DEVICE_TYPE(NCR53C90A, ncr53c90a_device, "ncr53c90a", "NCR 53C90A Advanced SCSI Controller")
-DEFINE_DEVICE_TYPE(NCR53C94, ncr53c94_device, "ncr53c94", "NCR 53C94 SCSI")
+DEFINE_DEVICE_TYPE(NCR53C94, ncr53c94_device, "ncr53c94", "NCR 53C94 Advanced SCSI Controller")
+DEFINE_DEVICE_TYPE(NCR53CF94, ncr53cf94_device, "ncr53cf94", "NCR 53CF94-2 Fast SCSI Controller") // TODO: differences not emulated
 
 void ncr5390_device::map(address_map &map)
 {
@@ -147,12 +148,22 @@ ncr53c90a_device::ncr53c90a_device(const machine_config &mconfig, const char *ta
 }
 
 ncr53c94_device::ncr53c94_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
-	: ncr53c90a_device(mconfig, NCR53C94, tag, owner, clock)
+	: ncr53c94_device(mconfig, NCR53C94, tag, owner, clock)
+{
+}
+
+ncr53c94_device::ncr53c94_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock)
+	: ncr53c90a_device(mconfig, type, tag, owner, clock)
 	, config3(0)
 	, m_busmd(BUSMD_0)
 {
 }
 
+ncr53cf94_device::ncr53cf94_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
+	: ncr53c94_device(mconfig, NCR53CF94, tag, owner, clock)
+{
+}
+
 void ncr5390_device::device_start()
 {
 	nscsi_device::device_start();

src/devices/machine/ncr5390.h

@@ -307,6 +307,8 @@ public:
 	void dma16_w(u16 data);
 
 protected:
+	ncr53c94_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
+
 	enum conf3_mask : u8
 	{
 		BS8  = 0x01, // burst size 8
@@ -324,8 +326,15 @@ private:
 	busmd_t m_busmd;
 };
 
+class ncr53cf94_device : public ncr53c94_device
+{
+public:
+	ncr53cf94_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+};
+
 DECLARE_DEVICE_TYPE(NCR5390, ncr5390_device)
 DECLARE_DEVICE_TYPE(NCR53C90A, ncr53c90a_device)
 DECLARE_DEVICE_TYPE(NCR53C94, ncr53c94_device)
+DECLARE_DEVICE_TYPE(NCR53CF94, ncr53cf94_device)
 
 #endif // MAME_MACHINE_NCR5390_H