(MESS) horizon: WIP. (nw)

.gitattributes

@@ -7645,6 +7645,10 @@ src/mess/machine/s100_djdma.c svneol=native#text/plain
 src/mess/machine/s100_djdma.h svneol=native#text/plain
 src/mess/machine/s100_mm65k16s.c svneol=native#text/plain
 src/mess/machine/s100_mm65k16s.h svneol=native#text/plain
+src/mess/machine/s100_nsmdsa.c svneol=native#text/plain
+src/mess/machine/s100_nsmdsa.h svneol=native#text/plain
+src/mess/machine/s100_nsmdsad.c svneol=native#text/plain
+src/mess/machine/s100_nsmdsad.h svneol=native#text/plain
 src/mess/machine/s100_wunderbus.c svneol=native#text/plain
 src/mess/machine/s100_wunderbus.h svneol=native#text/plain
 src/mess/machine/s1410.c svneol=native#text/plain

src/mess/drivers/horizon.c

@@ -8,119 +8,273 @@
         succesfully loaded. The memory range EA00-EB40 appears to be
         used by devices, particularly the FDC.
 
+	http://www.hartetechnologies.com/manuals/Northstar/
+
 ****************************************************************************/
 
+/*
+
+	TODO:
+
+	- connect to S-100 bus
+	- USARTs
+	- parallel I/O
+	- motherboard ports
+	- RTC
+	- RAM boards
+	- floppy boards
+	- floating point board
+	- SOROC IQ 120 CRT terminal
+	- NEC 5530-2 SPINWRITER printer
+	- Anadex DP-8000 printer
+
+*/
+
 #include "emu.h"
 #include "cpu/z80/z80.h"
-#include "machine/terminal.h"
+#include "machine/i8251.h"
+#include "machine/serial.h"
+#include "machine/s100.h"
+#include "machine/s100_nsmdsa.h"
+#include "machine/s100_nsmdsad.h"
 
+#define Z80_TAG			"z80"
+#define I8251_L_TAG		"3a"
+#define I8251_R_TAG		"4a"
+#define RS232_A_TAG		"rs232a"
+#define RS232_B_TAG		"rs232b"
 
 class horizon_state : public driver_device
 {
 public:
 	horizon_state(const machine_config &mconfig, device_type type, const char *tag)
 		: driver_device(mconfig, type, tag),
-	m_maincpu(*this, "maincpu"),
+		  m_maincpu(*this, Z80_TAG),
-	m_terminal(*this, TERMINAL_TAG)
+		  m_usart_l(*this, I8251_L_TAG),
+		  m_usart_r(*this, I8251_L_TAG)
 	{ }
 
 	required_device<cpu_device> m_maincpu;
-	required_device<generic_terminal_device> m_terminal;
+	required_device<i8251_device> m_usart_l;
-	DECLARE_WRITE8_MEMBER( kbd_put );
+	required_device<i8251_device> m_usart_r;
-	//UINT8 m_term_data;
-	virtual void machine_reset();
-	DECLARE_MACHINE_RESET(horizon_sd);
 };
 
 
-static ADDRESS_MAP_START(horizon_mem, AS_PROGRAM, 8, horizon_state)
+
-	ADDRESS_MAP_UNMAP_HIGH
+//**************************************************************************
-	AM_RANGE(0x0000, 0xe7ff) AM_RAM
+//  ADDRESS MAPS
-	AM_RANGE(0xe800, 0xe8ff) AM_ROM
+//**************************************************************************
-	AM_RANGE(0xec00, 0xffff) AM_RAM
+
+//-------------------------------------------------
+//  ADDRESS_MAP( horizon_mem )
+//-------------------------------------------------
+
+static ADDRESS_MAP_START( horizon_mem, AS_PROGRAM, 8, horizon_state )
 ADDRESS_MAP_END
 
-static ADDRESS_MAP_START(horizon_io, AS_IO, 8, horizon_state)
+
-	ADDRESS_MAP_UNMAP_HIGH
+//-------------------------------------------------
-	ADDRESS_MAP_GLOBAL_MASK(0xff)
+//  ADDRESS_MAP( horizon_io )
+//-------------------------------------------------
+
+static ADDRESS_MAP_START( horizon_io, AS_IO, 8, horizon_state )
 ADDRESS_MAP_END
 
-static ADDRESS_MAP_START(horizon_sd_mem, AS_PROGRAM, 8, horizon_state)
-	ADDRESS_MAP_UNMAP_HIGH
-	AM_RANGE(0x0000, 0xe8ff) AM_RAM
-	AM_RANGE(0xe900, 0xe9ff) AM_ROM
-	AM_RANGE(0xec00, 0xffff) AM_RAM
-ADDRESS_MAP_END
 
-static ADDRESS_MAP_START(horizon_sd_io, AS_IO, 8, horizon_state)
-	ADDRESS_MAP_UNMAP_HIGH
-	ADDRESS_MAP_GLOBAL_MASK(0xff)
-ADDRESS_MAP_END
 
-/* Input ports */
+//**************************************************************************
+//  INPUT PORTS
+//**************************************************************************
+
+//-------------------------------------------------
+//  INPUT_PORTS( sage2 )
+//-------------------------------------------------
+
 static INPUT_PORTS_START( horizon )
 INPUT_PORTS_END
 
 
-void horizon_state::machine_reset()
-{
-	m_maincpu->set_state_int(Z80_PC, 0xe800);
-}
 
-MACHINE_RESET_MEMBER(horizon_state,horizon_sd)
+//**************************************************************************
-{
+//  DEVICE CONFIGURATION
-	m_maincpu->set_state_int(Z80_PC, 0xe900);
+//**************************************************************************
-}
 
-WRITE8_MEMBER( horizon_state::kbd_put )
+//-------------------------------------------------
-{
+//  i8251_interface usart_l_intf
-}
+//-------------------------------------------------
 
-static GENERIC_TERMINAL_INTERFACE( terminal_intf )
+static const i8251_interface usart_l_intf =
 {
-	DEVCB_DRIVER_MEMBER(horizon_state, kbd_put)
+	DEVCB_DEVICE_LINE_MEMBER(RS232_A_TAG, serial_port_device, rx),
+	DEVCB_DEVICE_LINE_MEMBER(RS232_A_TAG, serial_port_device, tx),
+	DEVCB_DEVICE_LINE_MEMBER(RS232_A_TAG, rs232_port_device, dsr_r),
+	DEVCB_DEVICE_LINE_MEMBER(RS232_A_TAG, rs232_port_device, dtr_w),
+	DEVCB_DEVICE_LINE_MEMBER(RS232_A_TAG, rs232_port_device, rts_w),
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL
 };
 
+
+//-------------------------------------------------
+//  i8251_interface usart_r_intf
+//-------------------------------------------------
+
+static const i8251_interface usart_r_intf =
+{
+	DEVCB_DEVICE_LINE_MEMBER(RS232_B_TAG, serial_port_device, rx),
+	DEVCB_DEVICE_LINE_MEMBER(RS232_B_TAG, serial_port_device, tx),
+	DEVCB_DEVICE_LINE_MEMBER(RS232_B_TAG, rs232_port_device, dsr_r),
+	DEVCB_DEVICE_LINE_MEMBER(RS232_B_TAG, rs232_port_device, dtr_w),
+	DEVCB_DEVICE_LINE_MEMBER(RS232_B_TAG, rs232_port_device, rts_w),
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL
+};
+
+
+//-------------------------------------------------
+//  rs232_port_interface rs232a_intf
+//-------------------------------------------------
+
+static DEVICE_INPUT_DEFAULTS_START( terminal )
+	DEVICE_INPUT_DEFAULTS( "TERM_FRAME", 0x0f, 0x06 ) // 9600
+	DEVICE_INPUT_DEFAULTS( "TERM_FRAME", 0x30, 0x00 ) // 8N1
+DEVICE_INPUT_DEFAULTS_END
+
+static const rs232_port_interface rs232a_intf =
+{
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL
+};
+
+
+//-------------------------------------------------
+//  rs232_port_interface rs232b_intf
+//-------------------------------------------------
+
+static const rs232_port_interface rs232b_intf =
+{
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL
+};
+
+
+//-------------------------------------------------
+//  S100_INTERFACE( s100_intf )
+//-------------------------------------------------
+
+static SLOT_INTERFACE_START( horizon_s100_cards )
+	SLOT_INTERFACE("mdsa", S100_MDS_A)
+	SLOT_INTERFACE("mdsad", S100_MDS_AD)
+	//SLOT_INTERFACE("hram", S100_HRAM)
+	//SLOT_INTERFACE("ram32a", S100_RAM32A)
+	//SLOT_INTERFACE("ram16a", S100_RAM16A)
+	//SLOT_INTERFACE("fpb", S100_FPB)
+SLOT_INTERFACE_END
+
+static S100_INTERFACE( s100_intf )
+{
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_CPU_INPUT_LINE(Z80_TAG, Z80_INPUT_LINE_WAIT),
+	DEVCB_NULL,
+	DEVCB_NULL,
+	DEVCB_NULL
+};
+
+
+
+//**************************************************************************
+//  MACHINE DRIVERS
+//**************************************************************************
+
+//-------------------------------------------------
+//  MACHINE_CONFIG( horizon )
+//-------------------------------------------------
+
 static MACHINE_CONFIG_START( horizon, horizon_state )
-	/* basic machine hardware */
+	// basic machine hardware
-	MCFG_CPU_ADD("maincpu",Z80, XTAL_4MHz)
+	MCFG_CPU_ADD(Z80_TAG, Z80, XTAL_4MHz)
 	MCFG_CPU_PROGRAM_MAP(horizon_mem)
 	MCFG_CPU_IO_MAP(horizon_io)
 
+	// devices
+	MCFG_I8251_ADD(I8251_L_TAG, usart_l_intf)
+	MCFG_I8251_ADD(I8251_R_TAG, usart_r_intf)
+	MCFG_RS232_PORT_ADD(RS232_A_TAG, rs232a_intf, default_rs232_devices, "serial_terminal", terminal)
+	MCFG_RS232_PORT_ADD(RS232_B_TAG, rs232b_intf, default_rs232_devices, NULL, NULL)
 
-	/* video hardware */
+	// S-100
-	MCFG_GENERIC_TERMINAL_ADD(TERMINAL_TAG, terminal_intf)
+	MCFG_S100_BUS_ADD(s100_intf)
+	//MCFG_S100_SLOT_ADD("s100_1", horizon_s100_cards, NULL, NULL) // CPU
+	MCFG_S100_SLOT_ADD("s100_2", horizon_s100_cards, NULL, NULL) // RAM
+	MCFG_S100_SLOT_ADD("s100_3", horizon_s100_cards, "mdsad", NULL) // MDS
+	MCFG_S100_SLOT_ADD("s100_4", horizon_s100_cards, NULL, NULL) // FPB
+	MCFG_S100_SLOT_ADD("s100_5", horizon_s100_cards, NULL, NULL)
+	MCFG_S100_SLOT_ADD("s100_6", horizon_s100_cards, NULL, NULL)
+	MCFG_S100_SLOT_ADD("s100_7", horizon_s100_cards, NULL, NULL)
+	MCFG_S100_SLOT_ADD("s100_8", horizon_s100_cards, NULL, NULL)
+	MCFG_S100_SLOT_ADD("s100_9", horizon_s100_cards, NULL, NULL)
+	MCFG_S100_SLOT_ADD("s100_10", horizon_s100_cards, NULL, NULL)
+	MCFG_S100_SLOT_ADD("s100_11", horizon_s100_cards, NULL, NULL)
+	MCFG_S100_SLOT_ADD("s100_12", horizon_s100_cards, NULL, NULL)
 
 	// software list
 	MCFG_SOFTWARE_LIST_ADD("flop_list", "horizon")
 MACHINE_CONFIG_END
 
-static MACHINE_CONFIG_DERIVED( horizsd, horizon )
-	MCFG_CPU_MODIFY( "maincpu" )
-	MCFG_CPU_PROGRAM_MAP( horizon_sd_mem)
-	MCFG_CPU_IO_MAP(horizon_sd_io)
 
-	MCFG_MACHINE_RESET_OVERRIDE(horizon_state,horizon_sd)
-MACHINE_CONFIG_END
 
-/* ROM definition */
+//**************************************************************************
-ROM_START( horizdd )
+//  ROMS
-	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
+//**************************************************************************
-	ROM_LOAD( "horizon.bin", 0xe800, 0x0100, CRC(7aafa134) SHA1(bf1552c4818f30473798af4f54e65e1957e0db48))
+
+//-------------------------------------------------
+//  ROM( horizon )
+//-------------------------------------------------
+
+ROM_START( horizon )
+	ROM_REGION( 0x400, Z80_TAG, 0 )
+	ROM_LOAD( "option.prom", 0x000, 0x400, NO_DUMP )
 ROM_END
 
-ROM_START( horizsd )
+
-	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
+//-------------------------------------------------
-	ROM_LOAD( "horizon-sd.bin", 0xe900, 0x0100, CRC(754e53e5) SHA1(875e42942d639b972252b87d86c3dc2133304967))
+//  ROM( vector1 )
-ROM_END
+//-------------------------------------------------
 
 ROM_START( vector1 ) // This one have different I/O
-	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
+	ROM_REGION( 0x10000, Z80_TAG, ROMREGION_ERASEFF )
 	ROM_LOAD( "horizon.bin", 0xe800, 0x0100, CRC(7aafa134) SHA1(bf1552c4818f30473798af4f54e65e1957e0db48))
 ROM_END
-/* Driver */
 
-/*    YEAR  NAME    PARENT  COMPAT   MACHINE    INPUT    INIT   COMPANY   FULLNAME       FLAGS */
+
-COMP( 1979, horizdd,  0,       0,    horizon,   horizon, driver_device, 0,  "NorthStar", "Horizon (DD drive)", GAME_NOT_WORKING | GAME_NO_SOUND)
+
-COMP( 1979, horizsd,  horizdd, 0,    horizsd,   horizon, driver_device, 0,  "NorthStar", "Horizon (SD drive)", GAME_NOT_WORKING | GAME_NO_SOUND)
+//**************************************************************************
-COMP( 1979, vector1,  horizdd, 0,    horizon,   horizon, driver_device, 0,  "Vector Graphic", "Vector 1+ (DD drive)", GAME_NOT_WORKING | GAME_NO_SOUND)
+//  SYSTEM DRIVERS
+//**************************************************************************
+
+//    YEAR  NAME    PARENT  COMPAT  MACHINE INPUT   INIT    COMPANY                             FULLNAME    FLAGS
+COMP( 1976, horizon,  0,       0,    horizon,   horizon, driver_device, 0,  "North Star Computers", "Horizon", GAME_NOT_WORKING | GAME_NO_SOUND_HW )
+COMP( 1979, vector1,  horizon, 0,    horizon,   horizon, driver_device, 0,  "Vector Graphic", "Vector 1+ (DD drive)", GAME_NOT_WORKING | GAME_NO_SOUND_HW )

src/mess/drivers/mpz80.c

@@ -739,7 +739,7 @@ static MACHINE_CONFIG_START( mpz80, mpz80_state )
 	MCFG_CPU_IO_MAP(mpz80_io)
 
 	// S-100
-	MCFG_S100_BUS_ADD(Z80_TAG, s100_intf)
+	MCFG_S100_BUS_ADD(s100_intf)
 	MCFG_S100_SLOT_ADD("s100_1", mpz80_s100_cards, "mm65k16s", NULL)
 	MCFG_S100_SLOT_ADD("s100_2", mpz80_s100_cards, "wunderbus", NULL)
 	MCFG_S100_SLOT_ADD("s100_3", mpz80_s100_cards, "dj2db", NULL)

src/mess/drivers/xor100.c

@@ -616,7 +616,7 @@ static MACHINE_CONFIG_START( xor100, xor100_state )
 	MCFG_RS232_PORT_ADD(RS232_B_TAG, rs232b_intf, default_rs232_devices, "serial_terminal", terminal)
 
 	// S-100
-	MCFG_S100_BUS_ADD(Z80_TAG, s100_intf)
+	MCFG_S100_BUS_ADD(s100_intf)
 	MCFG_S100_SLOT_ADD("s100_1", xor100_s100_cards, NULL, NULL)
 	MCFG_S100_SLOT_ADD("s100_2", xor100_s100_cards, NULL, NULL)
 	MCFG_S100_SLOT_ADD("s100_3", xor100_s100_cards, NULL, NULL)

src/mess/machine/s100.c

@@ -31,12 +31,6 @@ s100_slot_device::s100_slot_device(const machine_config &mconfig, const char *ta
 {
 }
 
-void s100_slot_device::static_set_s100_slot(device_t &device, const char *tag)
-{
-	s100_slot_device &s100_card = dynamic_cast<s100_slot_device &>(device);
-	s100_card.m_bus_tag = tag;
-}
-
 
 //-------------------------------------------------
 //  device_start - device-specific startup
@@ -44,7 +38,7 @@ void s100_slot_device::static_set_s100_slot(device_t &device, const char *tag)
 
 void s100_slot_device::device_start()
 {
-	m_bus = machine().device<s100_device>(m_bus_tag);
+	m_bus = machine().device<s100_device>(S100_TAG);
 	device_s100_card_interface *dev = dynamic_cast<device_s100_card_interface *>(get_card_device());
 	if (dev) m_bus->add_s100_card(dev);
 }
@@ -58,13 +52,6 @@ void s100_slot_device::device_start()
 const device_type S100 = &device_creator<s100_device>;
 
 
-void s100_device::static_set_cputag(device_t &device, const char *tag)
-{
-	s100_device &s100 = downcast<s100_device &>(device);
-	s100.m_cputag = tag;
-}
-
-
 //-------------------------------------------------
 //  device_config_complete - perform any
 //  operations now that the configuration is
@@ -126,8 +113,6 @@ s100_device::s100_device(const machine_config &mconfig, const char *tag, device_
 
 void s100_device::device_start()
 {
-	m_maincpu = machine().device<cpu_device>(m_cputag);
-
 	// resolve callbacks
 	m_out_int_func.resolve(m_out_int_cb, *this);
 	m_out_nmi_func.resolve(m_out_nmi_cb, *this);

src/mess/machine/s100.h

@@ -81,10 +81,10 @@
 //  INTERFACE CONFIGURATION MACROS
 //**************************************************************************
 
-#define MCFG_S100_BUS_ADD(_cpu_tag, _config) \
+#define MCFG_S100_BUS_ADD(_config) \
 	MCFG_DEVICE_ADD(S100_TAG, S100, 0) \
-	MCFG_DEVICE_CONFIG(_config) \
+	MCFG_DEVICE_CONFIG(_config)
-	s100_device::static_set_cputag(*device, _cpu_tag);
+
 
 #define S100_INTERFACE(_name) \
 	const s100_bus_interface (_name) =
@@ -92,8 +92,8 @@
 
 #define MCFG_S100_SLOT_ADD(_tag, _slot_intf, _def_slot, _def_inp) \
 	MCFG_DEVICE_ADD(_tag, S100_SLOT, 0) \
-	MCFG_DEVICE_SLOT_INTERFACE(_slot_intf, _def_slot, _def_inp, false) \
+	MCFG_DEVICE_SLOT_INTERFACE(_slot_intf, _def_slot, _def_inp, false)
-	s100_slot_device::static_set_s100_slot(*device, S100_TAG);
+
 
 
 //**************************************************************************
@@ -114,12 +114,7 @@ public:
 	// device-level overrides
 	virtual void device_start();
 
-	// inline configuration
-	static void static_set_s100_slot(device_t &device, const char *tag);
-
 private:
-	// configuration
-	const char *m_bus_tag;
 	s100_device  *m_bus;
 };
 
@@ -163,8 +158,6 @@ class s100_device : public device_t,
 public:
 	// construction/destruction
 	s100_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
-	// inline configuration
-	static void static_set_cputag(device_t &device, const char *tag);
 
 	void add_s100_card(device_s100_card_interface *card);
 
@@ -203,9 +196,6 @@ protected:
 	virtual void device_config_complete();
 
 private:
-	// internal state
-	cpu_device   *m_maincpu;
-
 	devcb_resolved_write_line   m_out_int_func;
 	devcb_resolved_write_line   m_out_nmi_func;
 	devcb_resolved_write_line   m_out_vi0_func;
@@ -226,7 +216,6 @@ private:
 	devcb_resolved_write8       m_out_terminal_func;
 
 	simple_list<device_s100_card_interface> m_device_list;
-	const char *m_cputag;
 };
 
 

src/mess/machine/s100_nsmdsa.c

@@ -0,0 +1,121 @@
+/**********************************************************************
+
+    North Star MICRO-DISK System MDS-A (Single Density) emulation
+
+    Copyright MESS Team.
+    Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************/
+
+#include "s100_nsmdsa.h"
+
+
+
+//**************************************************************************
+//  DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type S100_MDS_A = &device_creator<s100_mds_a_device>;
+
+
+//-------------------------------------------------
+//  ROM( mds_a )
+//-------------------------------------------------
+
+ROM_START( mds_a )
+	ROM_REGION( 0x100, "psel", 0 )
+	ROM_LOAD( "psel.7g", 0x000, 0x100, NO_DUMP ) // 74S287
+
+	ROM_REGION( 0x100, "pgm", 0 )
+	ROM_LOAD( "pgml.3f", 0x000, 0x100, NO_DUMP ) // 74S287
+	ROM_LOAD( "pgmr.3e", 0x000, 0x100, NO_DUMP ) // 74S287
+	ROM_LOAD( "horizon.bin", 0x000, 0x100, CRC(754e53e5) SHA1(875e42942d639b972252b87d86c3dc2133304967) BAD_DUMP )
+ROM_END
+
+
+//-------------------------------------------------
+//  rom_region - device-specific ROM region
+//-------------------------------------------------
+
+const rom_entry *s100_mds_a_device::device_rom_region() const
+{
+	return ROM_NAME( mds_a );
+}
+
+
+//-------------------------------------------------
+//  SLOT_INTERFACE( mds_a_floppies )
+//-------------------------------------------------
+
+static SLOT_INTERFACE_START( mds_a_floppies )
+	SLOT_INTERFACE( "525sd", FLOPPY_525_SD ) // Shugart SA-400
+SLOT_INTERFACE_END
+
+
+//-------------------------------------------------
+//  MACHINE_CONFIG_FRAGMENT( mds_a )
+//-------------------------------------------------
+
+static MACHINE_CONFIG_FRAGMENT( mds_a )
+	MCFG_FLOPPY_DRIVE_ADD("floppy0", mds_a_floppies, "525sd", NULL, floppy_image_device::default_floppy_formats)
+	MCFG_FLOPPY_DRIVE_ADD("floppy1", mds_a_floppies, "525sd", NULL, floppy_image_device::default_floppy_formats)
+MACHINE_CONFIG_END
+
+
+//-------------------------------------------------
+//  machine_config_additions - device-specific
+//  machine configurations
+//-------------------------------------------------
+
+machine_config_constructor s100_mds_a_device::device_mconfig_additions() const
+{
+	return MACHINE_CONFIG_NAME( mds_a );
+}
+
+
+
+//**************************************************************************
+//  LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+//  s100_mds_a_device - constructor
+//-------------------------------------------------
+
+s100_mds_a_device::s100_mds_a_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+	device_t(mconfig, S100_MDS_A, "MDS-A", tag, owner, clock, "nsmdsa", __FILE__),
+	device_s100_card_interface(mconfig, *this),
+	m_floppy0(*this, "floppy0"),
+	m_floppy1(*this, "floppy1"),
+	m_psel_rom(*this, "psel"),
+	m_pgm_rom(*this, "pgm")
+{
+}
+
+
+//-------------------------------------------------
+//  device_start - device-specific startup
+//-------------------------------------------------
+
+void s100_mds_a_device::device_start()
+{
+}
+
+
+//-------------------------------------------------
+//  device_reset - device-specific reset
+//-------------------------------------------------
+
+void s100_mds_a_device::device_reset()
+{
+}
+
+
+//-------------------------------------------------
+//  s100_smemr_r - memory read
+//-------------------------------------------------
+
+UINT8 s100_mds_a_device::s100_smemr_r(address_space &space, offs_t offset)
+{
+	return 0;
+}

src/mess/machine/s100_nsmdsa.h

@@ -0,0 +1,59 @@
+/**********************************************************************
+
+    North Star MICRO-DISK System MDS-A (Single Density) emulation
+
+    Copyright MESS Team.
+    Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************/
+
+#pragma once
+
+#ifndef __S100_MDS_A__
+#define __S100_MDS_A__
+
+#include "emu.h"
+#include "imagedev/floppy.h"
+#include "machine/s100.h"
+
+
+
+//**************************************************************************
+//  TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> s100_mds_a_device
+
+class s100_mds_a_device : public device_t,
+						  public device_s100_card_interface
+{
+public:
+	// construction/destruction
+	s100_mds_a_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+	// optional information overrides
+	virtual const rom_entry *device_rom_region() const;
+	virtual machine_config_constructor device_mconfig_additions() const;
+
+protected:
+	// device-level overrides
+	virtual void device_start();
+	virtual void device_reset();
+
+	// device_s100_card_interface overrides
+	virtual UINT8 s100_smemr_r(address_space &space, offs_t offset);
+
+private:
+	required_device<floppy_connector> m_floppy0;
+	required_device<floppy_connector> m_floppy1;
+	required_memory_region m_psel_rom;
+	required_memory_region m_pgm_rom;
+};
+
+
+// device type definition
+extern const device_type S100_MDS_A;
+
+
+
+#endif

src/mess/machine/s100_nsmdsad.c

@@ -0,0 +1,123 @@
+/**********************************************************************
+
+    North Star MICRO-DISK System MDS-A-D (Double Density) emulation
+
+    Copyright MESS Team.
+    Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************/
+
+#include "s100_nsmdsad.h"
+
+
+
+//**************************************************************************
+//  DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type S100_MDS_AD = &device_creator<s100_mds_ad_device>;
+
+
+//-------------------------------------------------
+//  ROM( mds_ad )
+//-------------------------------------------------
+
+ROM_START( mds_ad )
+	ROM_REGION( 0x100, "dsel", 0 )
+	ROM_LOAD( "dsel.11c", 0x000, 0x100, NO_DUMP ) // 82S129
+
+	ROM_REGION( 0x100, "dpgm", 0 )
+	ROM_LOAD( "dpgm.9d", 0x000, 0x100, CRC(7aafa134) SHA1(bf1552c4818f30473798af4f54e65e1957e0db48) )
+
+	ROM_REGION( 0x100, "dwe", 0 )
+	ROM_LOAD( "dwe.4c", 0x000, 0x100, NO_DUMP ) // 82S129
+ROM_END
+
+
+//-------------------------------------------------
+//  rom_region - device-specific ROM region
+//-------------------------------------------------
+
+const rom_entry *s100_mds_ad_device::device_rom_region() const
+{
+	return ROM_NAME( mds_ad );
+}
+
+
+//-------------------------------------------------
+//  SLOT_INTERFACE( mds_ad_floppies )
+//-------------------------------------------------
+
+static SLOT_INTERFACE_START( mds_ad_floppies )
+	SLOT_INTERFACE( "525dd", FLOPPY_525_DD ) // Shugart SA-400
+SLOT_INTERFACE_END
+
+
+//-------------------------------------------------
+//  MACHINE_CONFIG_FRAGMENT( mds_ad )
+//-------------------------------------------------
+
+static MACHINE_CONFIG_FRAGMENT( mds_ad )
+	MCFG_FLOPPY_DRIVE_ADD("floppy0", mds_ad_floppies, "525dd", NULL, floppy_image_device::default_floppy_formats)
+	MCFG_FLOPPY_DRIVE_ADD("floppy1", mds_ad_floppies, "525dd", NULL, floppy_image_device::default_floppy_formats)
+MACHINE_CONFIG_END
+
+
+//-------------------------------------------------
+//  machine_config_additions - device-specific
+//  machine configurations
+//-------------------------------------------------
+
+machine_config_constructor s100_mds_ad_device::device_mconfig_additions() const
+{
+	return MACHINE_CONFIG_NAME( mds_ad );
+}
+
+
+
+//**************************************************************************
+//  LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+//  s100_mds_ad_device - constructor
+//-------------------------------------------------
+
+s100_mds_ad_device::s100_mds_ad_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+	device_t(mconfig, S100_MDS_AD, "MDS-A-D", tag, owner, clock, "nsmdsad", __FILE__),
+	device_s100_card_interface(mconfig, *this),
+	m_floppy0(*this, "floppy0"),
+	m_floppy1(*this, "floppy1"),
+	m_dsel_rom(*this, "dsel"),
+	m_dpgm_rom(*this, "dpgm"),
+	m_dwe_rom(*this, "dwe")
+{
+}
+
+
+//-------------------------------------------------
+//  device_start - device-specific startup
+//-------------------------------------------------
+
+void s100_mds_ad_device::device_start()
+{
+}
+
+
+//-------------------------------------------------
+//  device_reset - device-specific reset
+//-------------------------------------------------
+
+void s100_mds_ad_device::device_reset()
+{
+}
+
+
+//-------------------------------------------------
+//  s100_smemr_r - memory read
+//-------------------------------------------------
+
+UINT8 s100_mds_ad_device::s100_smemr_r(address_space &space, offs_t offset)
+{
+	return 0;
+}

src/mess/machine/s100_nsmdsad.h

@@ -0,0 +1,60 @@
+/**********************************************************************
+
+    North Star MICRO-DISK System MDS-A-D (Double Density) emulation
+
+    Copyright MESS Team.
+    Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************/
+
+#pragma once
+
+#ifndef __S100_MDS_AD__
+#define __S100_MDS_AD__
+
+#include "emu.h"
+#include "imagedev/floppy.h"
+#include "machine/s100.h"
+
+
+
+//**************************************************************************
+//  TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> s100_mds_ad_device
+
+class s100_mds_ad_device : public device_t,
+						   public device_s100_card_interface
+{
+public:
+	// construction/destruction
+	s100_mds_ad_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+	// optional information overrides
+	virtual const rom_entry *device_rom_region() const;
+	virtual machine_config_constructor device_mconfig_additions() const;
+
+protected:
+	// device-level overrides
+	virtual void device_start();
+	virtual void device_reset();
+
+	// device_s100_card_interface overrides
+	virtual UINT8 s100_smemr_r(address_space &space, offs_t offset);
+
+private:
+	required_device<floppy_connector> m_floppy0;
+	required_device<floppy_connector> m_floppy1;
+	required_memory_region m_dsel_rom;
+	required_memory_region m_dpgm_rom;
+	required_memory_region m_dwe_rom;
+};
+
+
+// device type definition
+extern const device_type S100_MDS_AD;
+
+
+
+#endif

src/mess/mess.lst

@@ -2012,8 +2012,7 @@ pro80
 pimps
 sage2
 zexall // zexall z80 test suite with kevtris' preloader/serial interface at 0000-00ff
-horizdd
+horizon
-horizsd
 vector1
 tricep
 indiana

src/mess/mess.mak

@@ -351,6 +351,7 @@ DRVLIBS += \
 	$(MESSOBJ)/next.a \
 	$(MESSOBJ)/nintendo.a \
 	$(MESSOBJ)/nokia.a \
+	$(MESSOBJ)/northstar.a \
 	$(MESSOBJ)/novag.a \
 	$(MESSOBJ)/olivetti.a \
 	$(MESSOBJ)/omnibyte.a \
@@ -1480,6 +1481,11 @@ $(MESSOBJ)/nokia.a:             \
 	$(MESS_DRIVERS)/mikromik.o  \
 	$(MESS_VIDEO)/mikromik.o    \
 
+$(MESSOBJ)/northstar.a:         \
+	$(MESS_DRIVERS)/horizon.o   \
+	$(MESS_MACHINE)/s100_nsmdsa.o \
+	$(MESS_MACHINE)/s100_nsmdsad.o \
+
 $(MESSOBJ)/novag.a:             \
 	$(MESS_DRIVERS)/mk1.o       \
 	$(MESS_DRIVERS)/mk2.o       \
@@ -2112,7 +2118,6 @@ $(MESSOBJ)/skeleton.a:          \
 	$(MESS_DRIVERS)/eti660.o    \
 	$(MESS_DRIVERS)/fk1.o       \
 	$(MESS_DRIVERS)/fidelz80.o  \
-	$(MESS_DRIVERS)/horizon.o   \
 	$(MESS_DRIVERS)/hpz80unk.o  \
 	$(MESS_DRIVERS)/ht68k.o     \
 	$(MESS_DRIVERS)/ie15.o     \