// license:BSD-3-Clause
// copyright-holders:Sandro Ronco
/***************************************************************************

        Heathkit H89

        12/05/2009 Skeleton driver.

    Monitor Commands:
    B Boot
    C Convert (number)
    G Go (address)
    I In (address)
    O Out (address,data)
    R Radix (H/O)
    S Substitute (address)
    T Test Memory
    V View

****************************************************************************/

#include "bus/rs232/rs232.h"
#include "cpu/z80/z80.h"
#include "machine/ins8250.h"

#define RS232_TAG "rs232"

class h89_state : public driver_device
{
public:
	h89_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag),
		m_maincpu(*this, "maincpu")
	{
	}

	required_device<cpu_device> m_maincpu;

	DECLARE_WRITE8_MEMBER( port_f2_w );

	UINT8 m_port_f2;
	virtual void machine_reset() override;
	TIMER_DEVICE_CALLBACK_MEMBER(h89_irq_timer);
};


static ADDRESS_MAP_START(h89_mem, AS_PROGRAM, 8, h89_state)
	ADDRESS_MAP_UNMAP_HIGH
	AM_RANGE(0x0000, 0x1fff) AM_ROM
	AM_RANGE(0x2000, 0xffff) AM_RAM
ADDRESS_MAP_END

static ADDRESS_MAP_START( h89_io, AS_IO, 8, h89_state)
	ADDRESS_MAP_UNMAP_HIGH
	ADDRESS_MAP_GLOBAL_MASK(0xff)
//  AM_RANGE(0x78, 0x7b)    expansion 1
//  AM_RANGE(0x7c, 0x7f)    expansion 2
//  AM_RANGE(0xd0, 0xd7)    8250 UART DCE
//  AM_RANGE(0xd8, 0xdf)    8250 UART DTE
//  AM_RANGE(0xe0, 0xe7)    8250 UART LP
	AM_RANGE(0xe8, 0xef)    AM_DEVREADWRITE("ins8250", ins8250_device, ins8250_r, ins8250_w) // 8250 UART console
//  AM_RANGE(0xf0, 0xf1)    front panel
	AM_RANGE(0xf2, 0xf2)    AM_WRITE(port_f2_w) AM_READ_PORT("SW501")
//  AM_RANGE(0xf8, 0xf9)    cassette
//  AM_RANGE(0xfa, 0xff)    serial I/O
ADDRESS_MAP_END

/* Input ports */
static INPUT_PORTS_START( h89 )
	PORT_START("SW501")
	PORT_DIPNAME( 0x03, 0x00, "Expansion 1" )  PORT_DIPLOCATION("S1:1,S1:2")
	PORT_DIPSETTING( 0x00, "H-88-1" )
	PORT_DIPSETTING( 0x01, "H/Z-47" )
	PORT_DIPSETTING( 0x02, "Z-67" )
	PORT_DIPSETTING( 0x03, "Undefined" )
	PORT_DIPNAME( 0x0c, 0x00, "Expansion 2" )  PORT_DIPLOCATION("S1:3,S1:4")
	PORT_DIPSETTING( 0x00, "H-89-37" )
	PORT_DIPSETTING( 0x04, "H/Z-47" )
	PORT_DIPSETTING( 0x08, "Z-67" )
	PORT_DIPSETTING( 0x0c, "Undefined" )
	PORT_DIPNAME( 0x10, 0x00, "Boot from" )  PORT_DIPLOCATION("S1:5")
	PORT_DIPSETTING( 0x00, "Expansion 1" )
	PORT_DIPSETTING( 0x10, "Expansion 2" )
	PORT_DIPNAME( 0x20, 0x20, "Perform memory test at start" )  PORT_DIPLOCATION("S1:6")
	PORT_DIPSETTING( 0x20, DEF_STR( Off ) )
	PORT_DIPSETTING( 0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x40, 0x00, "Console Baud rate" )  PORT_DIPLOCATION("S1:7")
	PORT_DIPSETTING( 0x00, "9600" )
	PORT_DIPSETTING( 0x40, "19200" )
	PORT_DIPNAME( 0x80, 0x00, "Boot mode" )  PORT_DIPLOCATION("S1:8")
	PORT_DIPSETTING( 0x00, DEF_STR( Normal ) )
	PORT_DIPSETTING( 0x80, "Auto" )
INPUT_PORTS_END


void h89_state::machine_reset()
{
}

TIMER_DEVICE_CALLBACK_MEMBER(h89_state::h89_irq_timer)
{
	if (m_port_f2 & 0x02)
		m_maincpu->set_input_line_and_vector(0, HOLD_LINE, 0xcf);
}

WRITE8_MEMBER( h89_state::port_f2_w )
{
	m_port_f2 = data;
}

static DEVICE_INPUT_DEFAULTS_START( terminal )
	DEVICE_INPUT_DEFAULTS( "RS232_TXBAUD", 0xff, RS232_BAUD_9600 )
	DEVICE_INPUT_DEFAULTS( "RS232_RXBAUD", 0xff, RS232_BAUD_9600 )
	DEVICE_INPUT_DEFAULTS( "RS232_STARTBITS", 0xff, RS232_STARTBITS_1 )
	DEVICE_INPUT_DEFAULTS( "RS232_DATABITS", 0xff, RS232_DATABITS_8 )
	DEVICE_INPUT_DEFAULTS( "RS232_PARITY", 0xff, RS232_PARITY_NONE )
	DEVICE_INPUT_DEFAULTS( "RS232_STOPBITS", 0xff, RS232_STOPBITS_1 )
DEVICE_INPUT_DEFAULTS_END


static MACHINE_CONFIG_START( h89, h89_state )
	/* basic machine hardware */
	MCFG_CPU_ADD("maincpu",Z80, XTAL_12_288MHz / 6)
	MCFG_CPU_PROGRAM_MAP(h89_mem)
	MCFG_CPU_IO_MAP(h89_io)

	MCFG_DEVICE_ADD( "ins8250", INS8250, XTAL_1_8432MHz )
	MCFG_INS8250_OUT_TX_CB(DEVWRITELINE(RS232_TAG, rs232_port_device, write_txd))

	MCFG_RS232_PORT_ADD(RS232_TAG, default_rs232_devices, "terminal")
	MCFG_RS232_RXD_HANDLER(DEVWRITELINE("ins8250", ins8250_uart_device, rx_w))
	MCFG_DEVICE_CARD_DEVICE_INPUT_DEFAULTS("terminal", terminal)

	MCFG_TIMER_DRIVER_ADD_PERIODIC("irq_timer", h89_state, h89_irq_timer, attotime::from_hz(100))
MACHINE_CONFIG_END

/* ROM definition */
ROM_START( h89 )
	ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF )
	ROM_LOAD( "2732_444-142_mtr90.rom", 0x0000, 0x1000, CRC(c4ff47c5) SHA1(d6f3d71ff270a663003ec18a3ed1fa49f627123a))
	ROM_LOAD( "2716_444-19_h17.rom", 0x1800, 0x0800, CRC(26e80ae3) SHA1(0c0ee95d7cb1a760f924769e10c0db1678f2435c))

	ROM_REGION( 0x10000, "otherroms", ROMREGION_ERASEFF )
	ROM_LOAD( "2732_444-84_mtr84.rom", 0x0000, 0x1000, CRC(c98e5f4c) SHA1(03347206dca145ff69ca08435db822b70ce106af))
	ROM_LOAD( "2732_mms84a_magnoliamms.bin", 0x0000, 0x1000, CRC(5563f42a) SHA1(1b74cafca8213d5c083f16d8a848933ab56eb43b))
ROM_END

/* Driver */

/*    YEAR  NAME    PARENT  COMPAT   MACHINE    INPUT    INIT    COMPANY   FULLNAME       FLAGS */
COMP( 1979, h89,    0,      0,       h89,       h89, driver_device,     0,    "Heath Inc", "Heathkit H89", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)
