// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************

    Wang PC keyboard emulation

    Copyright MESS Team.
    Visit http://mamedev.org for licensing and usage restrictions.

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

/*

PCB Layout
----------

Key Tronic A65-02454-002
PCB 201

|-----------------------------------------------------------------------|
|        LS273  PSG  555  LS04  4MHz  LS132  CN1            LS374   XR  |
|                                                    CPU                |
|     LD1           LD2           LD3           LD4           LD5       |
|        SW1              LS259              SW2          LS259         |
|                                                                       |
|                                                                       |
|                                                                       |
|                                                                       |
|                                                                       |
|                                                                       |
|                                                                       |
|-----------------------------------------------------------------------|

Notes:
    Relevant IC's shown.

    CPU         - Intel P8051AH "20-8051-225"
    PSG         - Texas Instruments SN76496N
    XR          - Exar Semiconductor XR22-908-03B? (hard to read)
    CN1         - 1x6 pin PCB header
    SW1         - 8-way DIP switch
    SW2         - 8-way DIP switch

*/

/*

    TODO:

    - rewrite the mcs51.c serial I/O to replace this horrible, horrible hack
    - dip switches

*/

#include "wangpckb.h"



//**************************************************************************
//  MACROS / CONSTANTS
//**************************************************************************

#define LOG 0

#define I8051_TAG       "z5"
#define SN76496_TAG     "z4"



//**************************************************************************
//  DEVICE DEFINITIONS
//**************************************************************************

const device_type WANGPC_KEYBOARD = &device_creator<wangpc_keyboard_device>;



//-------------------------------------------------
//  ROM( wangpc_keyboard )
//-------------------------------------------------

ROM_START( wangpc_keyboard )
	ROM_REGION( 0x1000, I8051_TAG, 0 )
	ROM_LOAD( "20-8051-225.z5", 0x0000, 0x1000, CRC(82d2999f) SHA1(2bb34a1de2d94b2885d9e8fcd4964296f6276c5c) )
ROM_END


//-------------------------------------------------
//  rom_region - device-specific ROM region
//-------------------------------------------------

const rom_entry *wangpc_keyboard_device::device_rom_region() const
{
	return ROM_NAME( wangpc_keyboard );
}


//-------------------------------------------------
//  ADDRESS_MAP( wangpc_keyboard_io )
//-------------------------------------------------

static ADDRESS_MAP_START( wangpc_keyboard_io, AS_IO, 8, wangpc_keyboard_device )
	//AM_RANGE(0x0000, 0xfeff) AM_READNOP
	AM_RANGE(0x47, 0x58) AM_MIRROR(0xff00) AM_READNOP
	AM_RANGE(0x00, 0x00) AM_MIRROR(0xff00) AM_DEVWRITE(SN76496_TAG, sn76496_device, write)
	AM_RANGE(MCS51_PORT_P1, MCS51_PORT_P1) AM_READWRITE(kb_p1_r, kb_p1_w)
	AM_RANGE(MCS51_PORT_P2, MCS51_PORT_P2) AM_WRITE(kb_p2_w)
	AM_RANGE(MCS51_PORT_P3, MCS51_PORT_P3) AM_WRITE(kb_p3_w)
ADDRESS_MAP_END


//-------------------------------------------------
//  MACHINE_DRIVER( wangpc_keyboard )
//-------------------------------------------------

static MACHINE_CONFIG_FRAGMENT( wangpc_keyboard )
	MCFG_CPU_ADD(I8051_TAG, I8051, XTAL_4MHz)
	MCFG_CPU_IO_MAP(wangpc_keyboard_io)

	// sound hardware
	MCFG_SPEAKER_STANDARD_MONO("mono")
	MCFG_SOUND_ADD(SN76496_TAG, SN76496, 2000000) // ???
	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.00)
MACHINE_CONFIG_END


//-------------------------------------------------
//  machine_config_additions - device-specific
//  machine configurations
//-------------------------------------------------

machine_config_constructor wangpc_keyboard_device::device_mconfig_additions() const
{
	return MACHINE_CONFIG_NAME( wangpc_keyboard );
}


//-------------------------------------------------
//  INPUT_PORTS( wangpc_keyboard )
//-------------------------------------------------

INPUT_PORTS_START( wangpc_keyboard )
	PORT_START("Y0")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("\xE2\x86\x90") PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8) // 2b
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNUSED ) // 63
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("EXEC") PORT_CODE(KEYCODE_INSERT) PORT_CHAR(UCHAR_MAMEKEY(INSERT)) // 53
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("DELETE") PORT_CODE(KEYCODE_END) PORT_CHAR(UCHAR_MAMEKEY(END)) // 52
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED ) // 43
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(UTF8_UP) PORT_CODE(KEYCODE_UP) PORT_CHAR(UCHAR_MAMEKEY(UP)) // 29
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("\xE2\x86\x96") // 26
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(UTF8_RIGHT) PORT_CODE(KEYCODE_RIGHT) PORT_CHAR(UCHAR_MAMEKEY(RIGHT)) // 2e

	PORT_START("Y1")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=') PORT_CHAR('+') // 64
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNUSED ) // 1f
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNUSED ) // 21
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_CLOSEBRACE) PORT_NAME("GL") // 54
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR('\'') PORT_CHAR('"')// 45
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("ENTER") PORT_CODE(KEYCODE_ENTER) PORT_CHAR('\r') // 44
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("RIGHT SHIFT") PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1) // 35
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(UTF8_LEFT) PORT_CODE(KEYCODE_LEFT) PORT_CHAR(UCHAR_MAMEKEY(LEFT)) // 2d

	PORT_START("Y2")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHAR(')') // 65
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('_') // 2f
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P') // 56
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('[') PORT_CHAR(']') // 55
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR(':') // 46
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED ) // 22
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNUSED ) // 23
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?') // 37

	PORT_START("Y3")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('*') // 67
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR('(') // 66
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I') // 58
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O') // 57
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K') // 48
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L') // 47
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<') // 38
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>') // 2a

	PORT_START("Y4")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("6 \xC2\xA3") PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR(0xa3) // 69
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('&') // 68
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y') // 5a
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U') // 59
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H') // 4a
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J') // 49
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N') // 3a
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M') // 39

	PORT_START("Y5")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$') // 6b
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%') // 6a
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R') // 5c
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T') // 5b
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F') // 4c
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G') // 4b
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V') // 3c
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B') // 3b

	PORT_START("Y6")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('@') // 6d
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#') // 6c
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W') // 5e
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E') // 5d
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S') // 4e
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D') // 4d
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X') // 3e
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C') // 3d

	PORT_START("Y7")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("\xE2\x87\xA4") PORT_CODE(KEYCODE_TILDE) // 1f
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!') // 6e
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("\xE2\x87\xA5") PORT_CODE(KEYCODE_TAB) PORT_CHAR('\t') // 6f
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q') // 5f
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("LOCK") PORT_CODE(KEYCODE_CAPSLOCK) PORT_CHAR(UCHAR_MAMEKEY(CAPSLOCK)) // 1e
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A') // 4f
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("LEFT SHIFT") PORT_CODE(KEYCODE_LSHIFT) PORT_CHAR(UCHAR_SHIFT_1) // 1b
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z') // 3f

	PORT_START("Y8")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("STOP") PORT_CODE(KEYCODE_F8) // 77
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("SRCH") PORT_CODE(KEYCODE_F9) // 76
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad ENTER") PORT_CODE(KEYCODE_ENTER_PAD) PORT_CHAR(UCHAR_MAMEKEY(ENTER_PAD)) // 1c
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad . ;") PORT_CODE(KEYCODE_DEL_PAD) PORT_CHAR(UCHAR_MAMEKEY(DEL_PAD)) // 32
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED ) // 33
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad 0 '") PORT_CODE(KEYCODE_0_PAD) PORT_CHAR(UCHAR_MAMEKEY(0_PAD)) // 34
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNUSED ) // 35
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(UTF8_DOWN) PORT_CODE(KEYCODE_DOWN) PORT_CHAR(UCHAR_MAMEKEY(DOWN)) // 28

	PORT_START("Y9")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("MERGE") PORT_CODE(KEYCODE_F6) // 79
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("NOTE") PORT_CODE(KEYCODE_F7) // 78
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("GOTO") // 11
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("CANCEL") // 12
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("2ND") PORT_CODE(KEYCODE_RCONTROL) PORT_CHAR(UCHAR_MAMEKEY(RCONTROL)) // 25

	PORT_START("YA")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("DEC TAB") PORT_CODE(KEYCODE_F4) // 7b
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("FORMAT") PORT_CODE(KEYCODE_F5) // 7a
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("\xE2\x86\x95") // 71
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("(blank)") // 70
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("SPACE") PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ') // 2c
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED ) // 27

	PORT_START("YB")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("PAGE") PORT_CODE(KEYCODE_F2) // 7d
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("CENTER") PORT_CODE(KEYCODE_F3) // 7c
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("MOVE") PORT_CODE(KEYCODE_F12) // 73
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("COMMAND") // 72
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START("YC")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("HELP") PORT_CODE(KEYCODE_ESC) // 36
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("INDENT") PORT_CODE(KEYCODE_F1) // 7e
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("REPLC") PORT_CODE(KEYCODE_F10) // 75
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("COPY") PORT_CODE(KEYCODE_F11) // 74
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("CTRL") PORT_CODE(KEYCODE_LCONTROL) PORT_CHAR(UCHAR_MAMEKEY(LCONTROL)) // 24
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNUSED ) // 1d
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED )

	PORT_START("YD")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad \xC3\x97") PORT_CODE(KEYCODE_ASTERISK) PORT_CHAR(UCHAR_MAMEKEY(ASTERISK)) // 14
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad \xC3\xB7") PORT_CODE(KEYCODE_MINUS_PAD) PORT_CHAR(UCHAR_MAMEKEY(MINUS_PAD)) // 18
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("PRINT") // 19
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNUSED ) // 20
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_PLUS_PAD) PORT_CHAR(UCHAR_MAMEKEY(PLUS_PAD)) PORT_NAME("ERASE") // 1a
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_UNUSED )
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED ) // 1c

	PORT_START("YE")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad + *") PORT_CODE(KEYCODE_NUMLOCK) PORT_CHAR(UCHAR_MAMEKEY(NUMLOCK))// 60
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad - !") PORT_CODE(KEYCODE_SLASH_PAD) PORT_CHAR(UCHAR_MAMEKEY(SLASH_PAD)) // 13
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad 8 >") PORT_CODE(KEYCODE_8_PAD) PORT_CHAR(UCHAR_MAMEKEY(8_PAD)) // 15
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad 9 " UTF8_UP) PORT_CODE(KEYCODE_9_PAD) PORT_CHAR(UCHAR_MAMEKEY(9_PAD)) // 16
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad 5 ]") PORT_CODE(KEYCODE_5_PAD) PORT_CHAR(UCHAR_MAMEKEY(5_PAD)) // 40
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad 6 $") PORT_CODE(KEYCODE_6_PAD) PORT_CHAR(UCHAR_MAMEKEY(6_PAD)) // 17
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad 3 #") PORT_CODE(KEYCODE_3_PAD) PORT_CHAR(UCHAR_MAMEKEY(3_PAD)) // 10
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED ) // 1b

	PORT_START("YF")
	PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("INSERT") PORT_CODE(KEYCODE_HOME) PORT_CHAR(UCHAR_MAMEKEY(HOME)) // 62
	PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("PREV") PORT_CODE(KEYCODE_PGUP) PORT_CHAR(UCHAR_MAMEKEY(PGUP)) // 61
	PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("NEXT") PORT_CODE(KEYCODE_PGDN) PORT_CHAR(UCHAR_MAMEKEY(PGDN)) // 51
	PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad 7 <") PORT_CODE(KEYCODE_7_PAD) PORT_CHAR(UCHAR_MAMEKEY(7_PAD)) // 50
	PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED ) // 42
	PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad 4 [") PORT_CODE(KEYCODE_4_PAD) PORT_CHAR(UCHAR_MAMEKEY(4_PAD)) // 41
	PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad 1 &") PORT_CODE(KEYCODE_1_PAD) PORT_CHAR(UCHAR_MAMEKEY(1_PAD)) // 31
	PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad 2 @") PORT_CODE(KEYCODE_2_PAD) PORT_CHAR(UCHAR_MAMEKEY(2_PAD)) // 30

	PORT_START("SW1")
	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Unknown ) )  PORT_DIPLOCATION("SW1:1")
	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) )  PORT_DIPLOCATION("SW1:2")
	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) )  PORT_DIPLOCATION("SW1:3")
	PORT_DIPSETTING(    0x04, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) )  PORT_DIPLOCATION("SW1:4")
	PORT_DIPSETTING(    0x08, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unknown ) )  PORT_DIPLOCATION("SW1:5")
	PORT_DIPSETTING(    0x10, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) )  PORT_DIPLOCATION("SW1:6")
	PORT_DIPSETTING(    0x20, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) )  PORT_DIPLOCATION("SW1:7")
	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) )  PORT_DIPLOCATION("SW1:8")
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )

	PORT_START("SW2")
	PORT_DIPNAME( 0x01, 0x01, DEF_STR( Unknown ) )  PORT_DIPLOCATION("SW2:1")
	PORT_DIPSETTING(    0x01, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x02, 0x02, DEF_STR( Unknown ) )  PORT_DIPLOCATION("SW2:2")
	PORT_DIPSETTING(    0x02, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x04, 0x04, DEF_STR( Unknown ) )  PORT_DIPLOCATION("SW2:3")
	PORT_DIPSETTING(    0x04, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x08, 0x08, DEF_STR( Unknown ) )  PORT_DIPLOCATION("SW2:4")
	PORT_DIPSETTING(    0x08, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x10, 0x10, DEF_STR( Unknown ) )  PORT_DIPLOCATION("SW2:5")
	PORT_DIPSETTING(    0x10, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x20, 0x20, DEF_STR( Unknown ) )  PORT_DIPLOCATION("SW2:6")
	PORT_DIPSETTING(    0x20, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x40, 0x40, DEF_STR( Unknown ) )  PORT_DIPLOCATION("SW2:7")
	PORT_DIPSETTING(    0x40, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
	PORT_DIPNAME( 0x80, 0x80, DEF_STR( Unknown ) )  PORT_DIPLOCATION("SW2:8")
	PORT_DIPSETTING(    0x80, DEF_STR( Off ) )
	PORT_DIPSETTING(    0x00, DEF_STR( On ) )
INPUT_PORTS_END


//-------------------------------------------------
//  input_ports - device-specific input ports
//-------------------------------------------------

ioport_constructor wangpc_keyboard_device::device_input_ports() const
{
	return INPUT_PORTS_NAME( wangpc_keyboard );
}



//**************************************************************************
//  LIVE DEVICE
//**************************************************************************

//-------------------------------------------------
//  wangpc_keyboard_device - constructor
//-------------------------------------------------

wangpc_keyboard_device::wangpc_keyboard_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
	: device_t(mconfig, WANGPC_KEYBOARD, "Wang PC Keyboard", tag, owner, clock, "wangpckb", __FILE__),
		device_serial_interface(mconfig, *this),
		m_maincpu(*this, I8051_TAG),
		m_y0(*this, "Y0"),
		m_y1(*this, "Y1"),
		m_y2(*this, "Y2"),
		m_y3(*this, "Y3"),
		m_y4(*this, "Y4"),
		m_y5(*this, "Y5"),
		m_y6(*this, "Y6"),
		m_y7(*this, "Y7"),
		m_y8(*this, "Y8"),
		m_y9(*this, "Y9"),
		m_ya(*this, "YA"),
		m_yb(*this, "YB"),
		m_yc(*this, "YC"),
		m_yd(*this, "YD"),
		m_ye(*this, "YE"),
		m_yf(*this, "YF"),
		m_txd_handler(*this)
{
}


//-------------------------------------------------
//  device_start - device-specific startup
//-------------------------------------------------

void wangpc_keyboard_device::device_start()
{
	m_txd_handler.resolve_safe();

	// set serial callbacks
	m_maincpu->i8051_set_serial_tx_callback(WRITE8_DELEGATE(wangpc_keyboard_device, mcs51_tx_callback));
	m_maincpu->i8051_set_serial_rx_callback(READ8_DELEGATE(wangpc_keyboard_device, mcs51_rx_callback));
	set_data_frame(1, 8, PARITY_NONE, STOP_BITS_2);
}


//-------------------------------------------------
//  device_reset - device-specific reset
//-------------------------------------------------

void wangpc_keyboard_device::device_reset()
{
	transmit_register_reset();
	receive_register_reset();

	m_txd_handler(1);
}


//-------------------------------------------------
//  write_rxd -
//-------------------------------------------------

WRITE_LINE_MEMBER(wangpc_keyboard_device::write_rxd)
{
	receive_register_update_bit(state);

	if (is_receive_register_full())
	{
		m_maincpu->set_input_line(MCS51_RX_LINE, ASSERT_LINE);
		receive_register_extract();

		if (LOG) logerror("Wang PC keyboard receive data %02x\n", get_received_char());
	}
}


//-------------------------------------------------
//  mcs51_rx_callback -
//-------------------------------------------------

READ8_MEMBER(wangpc_keyboard_device::mcs51_rx_callback)
{
	return get_received_char();
}


//-------------------------------------------------
//  mcs51_tx_callback -
//-------------------------------------------------

WRITE8_MEMBER(wangpc_keyboard_device::mcs51_tx_callback)
{
	if (LOG) logerror("Wang PC keyboard transmit data %02x\n", data);

	transmit_register_setup(data);

	// HACK bang the bits out immediately
	while (!is_transmit_register_empty())
	{
		m_txd_handler(transmit_register_get_data_bit());
	}
}


//-------------------------------------------------
//  kb_p1_r -
//-------------------------------------------------

READ8_MEMBER( wangpc_keyboard_device::kb_p1_r )
{
	UINT8 data = 0xff;

	switch (m_y & 0x0f)
	{
		case 0: data &= m_y0->read(); break;
		case 1: data &= m_y1->read(); break;
		case 2: data &= m_y2->read(); break;
		case 3: data &= m_y3->read(); break;
		case 4: data &= m_y4->read(); break;
		case 5: data &= m_y5->read(); break;
		case 6: data &= m_y6->read(); break;
		case 7: data &= m_y7->read(); break;
		case 8: data &= m_y8->read(); break;
		case 9: data &= m_y9->read(); break;
		case 0xa: data &= m_ya->read(); break;
		case 0xb: data &= m_yb->read(); break;
		case 0xc: data &= m_yc->read(); break;
		case 0xd: data &= m_yd->read(); break;
		case 0xe: data &= m_ye->read(); break;
		case 0xf: data &= m_yf->read(); break;
	}

	return data;
}


//-------------------------------------------------
//  kb_p1_w -
//-------------------------------------------------

WRITE8_MEMBER( wangpc_keyboard_device::kb_p1_w )
{
	/*

	    bit     description

	    P1.0    led 0
	    P1.1    led 1
	    P1.2    led 2
	    P1.3    led 3
	    P1.4    led 4
	    P1.5    led 5
	    P1.6
	    P1.7

	*/

	for (int i = 0; i < 6; i++)
	{
		output_set_led_value(i, !BIT(data, i));
	}

	if (LOG) logerror("P1 %02x\n", data);
}


//-------------------------------------------------
//  kb_p2_w -
//-------------------------------------------------

WRITE8_MEMBER( wangpc_keyboard_device::kb_p2_w )
{
	/*

	    bit     description

	    P2.0    row 0
	    P2.1    row 1
	    P2.2    row 2
	    P2.3    row 3
	    P2.4
	    P2.5
	    P2.6    chip enable for something
	    P2.7

	*/

	m_y = data & 0x0f;

	if (LOG) logerror("P2 %02x\n", data);
}


//-------------------------------------------------
//  kb_p3_w -
//-------------------------------------------------

WRITE8_MEMBER( wangpc_keyboard_device::kb_p3_w )
{
	/*

	    bit     description

	    P3.0    RxD
	    P3.1    TxD
	    P3.2
	    P3.3    chip enable for something
	    P3.4
	    P3.5
	    P3.6
	    P3.7

	*/

	if (LOG) logerror("P3 %02x\n", data);
}
