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

        Sun-1 Models
        ------------

    Sun-1

        Processor(s):   68000
        Notes:          Large black desktop boxes with 17" monitors.
                        Uses the original Stanford-designed video board
                        and a parallel microswitch keyboard (type 1) and
                        parallel mouse (Sun-1).

    100
        Processor(s):   68000 @ 10MHz
        Bus:            Multibus, serial
        Notes:          Uses a design similar to original SUN (Stanford
                        University Network) CPU. The version 1.5 CPU can
                        take larger RAMs.

    100U
        Processor(s):   68010 @ 10MHz
        CPU:            501-1007
        Bus:            Multibus, serial
        Notes:          "Brain transplant" for 100 series. Replaced CPU
                        and memory boards with first-generation Sun-2
                        CPU and memory boards so original customers
                        could run SunOS 1.x. Still has parallel kb/mouse
                        interface so type 1 keyboards and Sun-1 mice
                        could be connected.

    170
        Processor(s):   68010?
        Bus:            Multibus?
        Chassis type:   rackmount
        Notes:          Server. Slightly different chassis design than
                        2/170's


        Documentation:
            http://www.bitsavers.org/pdf/sun/sun1/800-0345_Sun-1_System_Ref_Man_Jul82.pdf
            (page 39,40 of pdf contain memory map)

        04/12/2009 Skeleton driver.

        04/04/2011 Modernised, added terminal keyboard.

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

#include "emu.h"
#include "cpu/m68000/m68000.h"
#include "machine/z80dart.h"
#include "machine/terminal.h"

#define TERMINAL_TAG "terminal"

class sun1_state : public driver_device
{
public:
	sun1_state(const machine_config &mconfig, device_type type, const char *tag)
		: driver_device(mconfig, type, tag),
		m_maincpu(*this, "maincpu"),
		m_terminal(*this, TERMINAL_TAG),
		m_p_ram(*this, "p_ram")
	{
	}

	required_device<cpu_device> m_maincpu;
	required_device<generic_terminal_device> m_terminal;
	DECLARE_READ16_MEMBER(sun1_upd7201_r);
	DECLARE_WRITE16_MEMBER(sun1_upd7201_w);
	DECLARE_WRITE8_MEMBER(kbd_put);
	virtual void machine_reset();
	required_shared_ptr<UINT16> m_p_ram;
	UINT8 m_term_data;
};



// Just hack to show output since upd7201 is not implemented yet

READ16_MEMBER( sun1_state::sun1_upd7201_r )
{
	UINT16 ret;
	if (offset == 0)
	{
		ret = m_term_data << 8;
		m_term_data = 0;
	}
	else
		ret = 0xfeff | (m_term_data ? 0x100 : 0);

	return ret;
}

WRITE16_MEMBER( sun1_state::sun1_upd7201_w )
{
	if (offset == 0)
		m_terminal->write(space, 0, data >> 8);
}

static ADDRESS_MAP_START(sun1_mem, AS_PROGRAM, 16, sun1_state)
	ADDRESS_MAP_UNMAP_HIGH
	AM_RANGE(0x00000000, 0x001fffff) AM_RAM AM_SHARE("p_ram") // 512 KB RAM / ROM at boot
	AM_RANGE(0x00200000, 0x00203fff) AM_ROM AM_REGION("user1",0)
	AM_RANGE(0x00600000, 0x00600007) AM_READWRITE( sun1_upd7201_r, sun1_upd7201_w )
ADDRESS_MAP_END

/* Input ports */
static INPUT_PORTS_START( sun1 )
INPUT_PORTS_END


void sun1_state::machine_reset()
{
	UINT8* user1 = memregion("user1")->base();

	memcpy((UINT8*)m_p_ram.target(),user1,0x4000);

	m_maincpu->reset();
	m_term_data = 0;
}


WRITE8_MEMBER( sun1_state::kbd_put )
{
	m_term_data = data;
}

static MACHINE_CONFIG_START( sun1, sun1_state )
	/* basic machine hardware */
	MCFG_CPU_ADD("maincpu", M68000, XTAL_10MHz)
	MCFG_CPU_PROGRAM_MAP(sun1_mem)

	/* video hardware */
	MCFG_DEVICE_ADD(TERMINAL_TAG, GENERIC_TERMINAL, 0)
	MCFG_GENERIC_TERMINAL_KEYBOARD_CB(WRITE8(sun1_state, kbd_put))
MACHINE_CONFIG_END

/* ROM definition */
ROM_START( sun1 )
	ROM_REGION( 0x4000, "user1", ROMREGION_ERASEFF )
	ROM_LOAD16_BYTE( "v10.8.bin", 0x0001, 0x2000, CRC(3528a0f8) SHA1(be437dd93d1a44eccffa6f5e05935119482beab0))
	ROM_LOAD16_BYTE( "v10.0.bin", 0x0000, 0x2000, CRC(1ad4c52a) SHA1(4bc1a19e8f202378d5d7baa8b95319275c040a6d))

	ROM_REGION( 0x4000, "diag", ROMREGION_ERASEFF )
	ROM_LOAD16_BYTE( "8mhzdiag.8.bin", 0x0001, 0x2000, CRC(808a549e) SHA1(d2aba014a5507c1538f2c1a73e1d2524f28034f4))
	ROM_LOAD16_BYTE( "8mhzdiag.0.bin", 0x0000, 0x2000, CRC(7a92d506) SHA1(5df3800f7083293fc01bb6a7e7538ad425bbebfb))

	ROM_REGION( 0x10000, "gfx", ROMREGION_ERASEFF )
	ROM_LOAD( "gfxu605.g4.bin",  0x0000, 0x0200, CRC(274b7b3d) SHA1(40d8be2cfcbd03512a05925991bb5030d5d4b5e9))
	ROM_LOAD( "gfxu308.g21.bin", 0x0200, 0x0200, CRC(35a6eed8) SHA1(25cb2dd8e5343cd7927c3045eb4cb96dc9935a37))
	ROM_LOAD( "gfxu108.g20.bin", 0x0400, 0x0200, CRC(ecee335e) SHA1(5f4d32dc918af15872cd6e700a04720caeb6c657))
	ROM_LOAD( "gfxu105.g0.bin",  0x0600, 0x0200, CRC(8e1a24b3) SHA1(dad2821c3a3137ad69e78b6fc29ab582e5d78646))
	ROM_LOAD( "gfxu104.g1.bin",  0x0800, 0x0200, CRC(86f7a483) SHA1(8eb3778f5497741cd4345e81ff1a903c9a63c8bb))
	ROM_LOAD( "gfxu307.g61.bin", 0x0a00, 0x0020, CRC(b190f25d) SHA1(80fbdc843f1eb68a2d3713499f04d99dab88ce83))
	ROM_LOAD( "gfxu107.g60.bin", 0x0a20, 0x0020, CRC(425d3a98) SHA1(9ae4ce3761c2f995d00bed8d752c55224d274062))

	ROM_REGION( 0x10000, "cpu", ROMREGION_ERASEFF )
	ROM_LOAD( "cpuu503.p2.bin", 0x0000, 0x0200, CRC(12d9a6be) SHA1(fca99f9c5afc630ac67cbd4e5ba4e5242b826848))
	ROM_LOAD( "cpuu602.p1.bin", 0x0200, 0x0020, CRC(ee1e5a14) SHA1(0d3346cb3b647fa2475bd7b4fa36ea6ecfdaf805))
	ROM_LOAD( "cpuu502.p0.bin", 0x0220, 0x0020, CRC(20eb1183) SHA1(9b268792b28d858d6b6a1b6c4148af88a8d6b735))
ROM_END

/* Driver */

/*    YEAR  NAME    PARENT  COMPAT   MACHINE    INPUT    INIT    COMPANY         FULLNAME       FLAGS */
COMP( 1982, sun1,  0,       0,       sun1,      sun1, driver_device,     0,  "Sun Microsystems", "Sun-1", GAME_NOT_WORKING | GAME_NO_SOUND)