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path: root/src/mame/machine/cit101_kbd.cpp
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// license:BSD-3-Clause
// copyright-holders:AJR
/**********************************************************************

    CIT-101 85-key keyboard

    This serial keyboard appears to transmit and receive signals over
    a single bidirectional wire at 4800 bits per second. Unlike the
    VT100 keyboard whose layout it mimics (indicator LEDs included),
    the CIT-101 keyboard transmits standard ASCII codes for most keys,
    and the complexity of decoding these strongly suggests that this
    must be done by some sort of MCU. There are also a few special
    characters with the 8th bit set, including the numeric keypad,
    the cursor keys, the Return key and the all-important no-key code.

    TODO: identify and dump MCU for low-level emulation
    TODO: indicator LEDs
    TODO: make repeat key do something
    TODO: CTRL+G doesn't seem to generate a beep

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

#include "emu.h"
#include "cit101_kbd.h"
#include "speaker.h"

#include "machine/keyboard.ipp"

//**************************************************************************
//  HLE KEYBOARD DEVICE
//**************************************************************************

DEFINE_DEVICE_TYPE(CIT101_HLE_KEYBOARD, cit101_hle_keyboard_device, "cit101_hle_kbd", "CIT-101 HLE Keyboard")

cit101_hle_keyboard_device::cit101_hle_keyboard_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
	: device_t(mconfig, CIT101_HLE_KEYBOARD, tag, owner, clock)
	, device_matrix_keyboard_interface(mconfig, *this, "KEYS0", "KEYS1", "KEYS2", "KEYS3")
	, device_buffered_serial_interface(mconfig, *this)
	, m_modifiers(*this, "MODIFIERS")
	, m_beeper(*this, "beeper")
	, m_txd_callback(*this)
	, m_command{0, 1}
{
}

INPUT_PORTS_START(cit101_hle_keyboard)
	PORT_START("MODIFIERS")
	PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_SHIFT_2) PORT_CODE(KEYCODE_LCONTROL)
	PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_SHIFT_1) PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT)
	PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_TOGGLE PORT_CHAR(UCHAR_MAMEKEY(CAPSLOCK)) PORT_CODE(KEYCODE_CAPSLOCK)
	PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Repeat") PORT_CODE(KEYCODE_RCONTROL)

	PORT_START("KEYS0")
	PORT_BIT(0x00000003, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x00000004, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("] }") PORT_CHAR(']') PORT_CHAR('}') PORT_CHAR(0x1d) PORT_CODE(KEYCODE_CLOSEBRACE)
	PORT_BIT(0x00000008, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("\\ |") PORT_CHAR('\\') PORT_CHAR('|') PORT_CHAR(0x1c) PORT_CODE(KEYCODE_BACKSLASH)
	PORT_BIT(0x00000010, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('[') PORT_CHAR('{') PORT_CODE(KEYCODE_OPENBRACE)
	PORT_BIT(0x00000020, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Z") PORT_CHAR('z') PORT_CHAR('Z') PORT_CHAR(0x1a) PORT_CODE(KEYCODE_Z)
	PORT_BIT(0x00000040, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Y") PORT_CHAR('y') PORT_CHAR('Y') PORT_CHAR(0x19) PORT_CODE(KEYCODE_Y)
	PORT_BIT(0x00000080, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("X") PORT_CHAR('x') PORT_CHAR('X') PORT_CHAR(0x18) PORT_CODE(KEYCODE_X)
	PORT_BIT(0x00000100, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("W") PORT_CHAR('W') PORT_CHAR('W') PORT_CHAR(0x17) PORT_CODE(KEYCODE_W)
	PORT_BIT(0x00000200, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("V") PORT_CHAR('v') PORT_CHAR('V') PORT_CHAR(0x16) PORT_CODE(KEYCODE_V)
	PORT_BIT(0x00000400, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("U") PORT_CHAR('u') PORT_CHAR('U') PORT_CHAR(0x15) PORT_CODE(KEYCODE_U)
	PORT_BIT(0x00000800, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("T") PORT_CHAR('t') PORT_CHAR('T') PORT_CHAR(0x14) PORT_CODE(KEYCODE_T)
	PORT_BIT(0x00001000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("S") PORT_CHAR('s') PORT_CHAR('S') PORT_CHAR(0x13) PORT_CODE(KEYCODE_S)
	PORT_BIT(0x00002000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("R") PORT_CHAR('r') PORT_CHAR('R') PORT_CHAR(0x12) PORT_CODE(KEYCODE_R)
	PORT_BIT(0x00004000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Q") PORT_CHAR('q') PORT_CHAR('Q') PORT_CHAR(0x11) PORT_CODE(KEYCODE_Q)
	PORT_BIT(0x00008000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("P") PORT_CHAR('p') PORT_CHAR('P') PORT_CHAR(0x10) PORT_CODE(KEYCODE_P)
	PORT_BIT(0x00010000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("O") PORT_CHAR('o') PORT_CHAR('O') PORT_CHAR(0x0f) PORT_CODE(KEYCODE_O)
	PORT_BIT(0x00020000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("N") PORT_CHAR('n') PORT_CHAR('N') PORT_CHAR(0x0e) PORT_CODE(KEYCODE_N)
	PORT_BIT(0x00040000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("M") PORT_CHAR('m') PORT_CHAR('M') PORT_CODE(KEYCODE_M)
	PORT_BIT(0x00080000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("L") PORT_CHAR('l') PORT_CHAR('L') PORT_CHAR(0x0c) PORT_CODE(KEYCODE_L)
	PORT_BIT(0x00100000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("K") PORT_CHAR('k') PORT_CHAR('K') PORT_CHAR(0x0b) PORT_CODE(KEYCODE_K)
	PORT_BIT(0x00200000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("J") PORT_CHAR('j') PORT_CHAR('J') PORT_CODE(KEYCODE_J)
	PORT_BIT(0x00400000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("I") PORT_CHAR('i') PORT_CHAR('I') PORT_CODE(KEYCODE_I)
	PORT_BIT(0x00800000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("H") PORT_CHAR('h') PORT_CHAR('H') PORT_CODE(KEYCODE_H)
	PORT_BIT(0x01000000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("G (Bell)") PORT_CHAR('g') PORT_CHAR('G') PORT_CHAR(0x07) PORT_CODE(KEYCODE_G)
	PORT_BIT(0x02000000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("F") PORT_CHAR('f') PORT_CHAR('F') PORT_CHAR(0x06) PORT_CODE(KEYCODE_F)
	PORT_BIT(0x04000000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("E") PORT_CHAR('e') PORT_CHAR('E') PORT_CHAR(0x05) PORT_CODE(KEYCODE_E)
	PORT_BIT(0x08000000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("D") PORT_CHAR('d') PORT_CHAR('D') PORT_CHAR(0x04) PORT_CODE(KEYCODE_D)
	PORT_BIT(0x10000000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("C") PORT_CHAR('c') PORT_CHAR('C') PORT_CHAR(0x03) PORT_CODE(KEYCODE_C)
	PORT_BIT(0x20000000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("B") PORT_CHAR('b') PORT_CHAR('B') PORT_CHAR(0x02) PORT_CODE(KEYCODE_B)
	PORT_BIT(0x40000000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("A") PORT_CHAR('a') PORT_CHAR('A') PORT_CHAR(0x01) PORT_CODE(KEYCODE_A)
	PORT_BIT(0x80000000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("` ~") PORT_CHAR('`') PORT_CHAR('~') PORT_CHAR(0x1e) PORT_CODE(KEYCODE_TILDE)

	PORT_START("KEYS1")
	PORT_BIT(0x00000003, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x00000004, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('=') PORT_CHAR('+') PORT_CODE(KEYCODE_EQUALS)
	PORT_BIT(0x00000008, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x00000010, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(';') PORT_CHAR(':') PORT_CODE(KEYCODE_COLON)
	PORT_BIT(0x00000020, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x00000040, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('9') PORT_CHAR('(') PORT_CODE(KEYCODE_9)
	PORT_BIT(0x00000080, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('8') PORT_CHAR('*') PORT_CODE(KEYCODE_8)
	PORT_BIT(0x00000100, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('7') PORT_CHAR('&') PORT_CODE(KEYCODE_7)
	PORT_BIT(0x00000200, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('6') PORT_CHAR('^') PORT_CODE(KEYCODE_6)
	PORT_BIT(0x00000400, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('5') PORT_CHAR('%') PORT_CODE(KEYCODE_5)
	PORT_BIT(0x00000800, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('4') PORT_CHAR('$') PORT_CODE(KEYCODE_4)
	PORT_BIT(0x00001000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("3 # \xc2\xa3") PORT_CHAR('3') PORT_CHAR('#', 0xa3) PORT_CODE(KEYCODE_3)
	PORT_BIT(0x00002000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('2') PORT_CHAR('@') PORT_CODE(KEYCODE_2)
	PORT_BIT(0x00004000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('1') PORT_CHAR('!') PORT_CODE(KEYCODE_1)
	PORT_BIT(0x00008000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('0') PORT_CHAR(')') PORT_CODE(KEYCODE_0)
	PORT_BIT(0x00010000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("/ ?") PORT_CHAR('/') PORT_CHAR('?') PORT_CHAR(0x1f) PORT_CODE(KEYCODE_SLASH)
	PORT_BIT(0x00020000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('.') PORT_CHAR('>') PORT_CODE(KEYCODE_STOP)
	PORT_BIT(0x00040000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('-') PORT_CHAR('_') PORT_CODE(KEYCODE_MINUS)
	PORT_BIT(0x00080000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(',') PORT_CHAR('<') PORT_CODE(KEYCODE_COMMA)
	PORT_BIT(0x00f00000, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x01000000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR('\'') PORT_CHAR('"') PORT_CODE(KEYCODE_QUOTE)
	PORT_BIT(0x7e000000, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x80000000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(' ') PORT_CODE(KEYCODE_SPACE)

	PORT_START("KEYS2")
	PORT_BIT(0x00000001, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Delete") PORT_CHAR(0x7f) PORT_CODE(KEYCODE_DEL)
	PORT_BIT(0x0000000e, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x00000010, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(0x1b) PORT_CODE(KEYCODE_ESC)
	PORT_BIT(0x001fffe0, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x00200000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Line Feed") PORT_CHAR(0x0a) PORT_CODE(KEYCODE_RALT)
	PORT_BIT(0x00400000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(0x09) PORT_CODE(KEYCODE_TAB)
	PORT_BIT(0x00800000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Back Space") PORT_CHAR(0x08) PORT_CODE(KEYCODE_BACKSPACE)
	PORT_BIT(0xff000000, IP_ACTIVE_HIGH, IPT_UNUSED)

	PORT_START("KEYS3")
	PORT_BIT(0x00000001, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x00000002, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Test Key 2")
	PORT_BIT(0x00000004, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Test Key 1")
	PORT_BIT(0x00000008, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("No Scroll") PORT_CHAR(UCHAR_MAMEKEY(SCRLOCK)) PORT_CODE(KEYCODE_LALT)
	PORT_BIT(0x00000010, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Break") PORT_CHAR(UCHAR_MAMEKEY(PAUSE)) PORT_CODE(KEYCODE_END)
	PORT_BIT(0x00000020, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Clr Home") PORT_CHAR(UCHAR_MAMEKEY(HOME)) PORT_CODE(KEYCODE_HOME)
	PORT_BIT(0x00000040, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(9_PAD)) PORT_CODE(KEYCODE_9_PAD)
	PORT_BIT(0x00000080, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(8_PAD)) PORT_CODE(KEYCODE_8_PAD)
	PORT_BIT(0x00000100, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(7_PAD)) PORT_CODE(KEYCODE_7_PAD)
	PORT_BIT(0x00000200, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(6_PAD)) PORT_CODE(KEYCODE_6_PAD)
	PORT_BIT(0x00000400, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(5_PAD)) PORT_CODE(KEYCODE_5_PAD)
	PORT_BIT(0x00000800, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(4_PAD)) PORT_CODE(KEYCODE_4_PAD)
	PORT_BIT(0x00001000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(3_PAD)) PORT_CODE(KEYCODE_3_PAD)
	PORT_BIT(0x00002000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(2_PAD)) PORT_CODE(KEYCODE_2_PAD)
	PORT_BIT(0x00004000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(1_PAD)) PORT_CODE(KEYCODE_1_PAD)
	PORT_BIT(0x00008000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(0_PAD)) PORT_CODE(KEYCODE_0_PAD)
	PORT_BIT(0x00010000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(ENTER_PAD)) PORT_CODE(KEYCODE_ENTER_PAD)
	PORT_BIT(0x00020000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(DEL_PAD)) PORT_CODE(KEYCODE_DEL_PAD)
	PORT_BIT(0x00040000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(MINUS_PAD)) PORT_CODE(KEYCODE_MINUS_PAD)
	PORT_BIT(0x00080000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(COMMA_PAD)) PORT_CODE(KEYCODE_PLUS_PAD)
	PORT_BIT(0x00100000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("PF4") PORT_CHAR(UCHAR_MAMEKEY(F4)) PORT_CODE(KEYCODE_F4)
	PORT_BIT(0x00200000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("PF3") PORT_CHAR(UCHAR_MAMEKEY(F3)) PORT_CODE(KEYCODE_F3)
	PORT_BIT(0x00400000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("PF2") PORT_CHAR(UCHAR_MAMEKEY(F2)) PORT_CODE(KEYCODE_F2)
	PORT_BIT(0x00800000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("PF1") PORT_CHAR(UCHAR_MAMEKEY(F1)) PORT_CODE(KEYCODE_F1)
	PORT_BIT(0x01000000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(LEFT)) PORT_CODE(KEYCODE_LEFT)
	PORT_BIT(0x02000000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(RIGHT)) PORT_CODE(KEYCODE_RIGHT)
	PORT_BIT(0x04000000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(DOWN)) PORT_CODE(KEYCODE_DOWN)
	PORT_BIT(0x08000000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CHAR(UCHAR_MAMEKEY(UP)) PORT_CODE(KEYCODE_UP)
	PORT_BIT(0x10000000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Return") PORT_CHAR(0x0d) PORT_CODE(KEYCODE_ENTER)
	PORT_BIT(0x20000000, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("Set-Up") PORT_CHAR(UCHAR_MAMEKEY(F5)) PORT_CODE(KEYCODE_F5)
	PORT_BIT(0x40000000, IP_ACTIVE_HIGH, IPT_UNUSED)
	PORT_BIT(0x80000000, IP_ACTIVE_HIGH, IPT_UNUSED) // actually used for special stop code
INPUT_PORTS_END

void cit101_hle_keyboard_device::device_add_mconfig(machine_config &config)
{
	SPEAKER(config, "mono").front_center();
	BEEP(config, m_beeper, 786).add_route(ALL_OUTPUTS, "mono", 0.50);
}

ioport_constructor cit101_hle_keyboard_device::device_input_ports() const
{
	return INPUT_PORTS_NAME(cit101_hle_keyboard);
}

void cit101_hle_keyboard_device::device_resolve_objects()
{
	m_txd_callback.resolve_safe();
}

void cit101_hle_keyboard_device::device_start()
{
	// keyboard USART configured for mode 8Eh
	set_data_frame(1, 8, PARITY_NONE, STOP_BITS_1_5);
	set_rate(4800);

	save_item(NAME(m_command));
}

void cit101_hle_keyboard_device::device_reset()
{
	stop_processing();
}

void cit101_hle_keyboard_device::tra_callback()
{
	m_txd_callback(transmit_register_get_data_bit());
}

WRITE_LINE_MEMBER(cit101_hle_keyboard_device::write_rxd)
{
	rx_w(state);
}

void cit101_hle_keyboard_device::received_byte(u8 byte)
{
	if (m_command[BIT(byte, 0)] != byte)
	{
		logerror("Command byte %d = %02X\n", BIT(byte, 0), byte);

		// probably not correct
		if (!BIT(byte, 0))
			m_beeper->set_state(BIT(byte, 2));

		m_command[BIT(byte, 0)] = byte;
	}

	start_processing(attotime::from_hz(76800)); // guess
}

void cit101_hle_keyboard_device::send_key(u8 code)
{
	transmit_byte(code);
}

void cit101_hle_keyboard_device::send_translated(u8 row, u8 column)
{
	const ioport_value modifiers = m_modifiers->read();

	logerror("Key row %d column %d\n", row, column);
	switch (row)
	{
	case 0:
		if (column < 5)
			send_key((BIT(modifiers, 0) ? 0x1f : BIT(modifiers, 1) ? 0x7f : 0x5f) - column);
		else if (column < 31)
			send_key((BIT(modifiers, 0) ? 0x1f : BIT(modifiers, 1) || BIT(modifiers, 2) ? 0x5f : 0x7f) - column);
		else
			send_key(BIT(modifiers, 0) ? 0x1e : BIT(modifiers, 1) ? '~' : 0x7f - column);
		break;
	case 1:
		if (BIT(modifiers, 0) && column == 16)
			send_key(0x2f - column);
		else if (!BIT(modifiers, 1) || column == 31)
			send_key((column == 31 && BIT(modifiers, 0) ? 0x1f : 0x3f) - column);
		else switch (0x3f - column)
		{
		case '=':
			send_key('+');
			break;
		case ';':
			send_key(':');
			break;
		case '9':
			send_key('(');
			break;
		case '8':
			send_key('*');
			break;
		case '7':
			send_key('&');
			break;
		case '6':
			send_key('^');
			break;
		case '2':
			send_key('@');
			break;
		case '0':
			send_key(')');
			break;
		case '-':
			send_key('_');
			break;
		case '\'':
			send_key('"');
			break;
		default:
			send_key(0x2f ^ column);
			break;
		}
		break;
	case 2:
		send_key((column == 0) ? 0x7f : 0x1f - column);
		break;
	case 3:
		send_key((0x9f - column) | (BIT(modifiers, 0) ? 0x40 : 0) | (BIT(modifiers, 1) ? 0x20 : 0));
		break;
	}
}

void cit101_hle_keyboard_device::key_make(u8 row, u8 column)
{
	send_translated(row, column);
}

void cit101_hle_keyboard_device::key_repeat(u8 row, u8 column)
{
	send_translated(row, column);
}

void cit101_hle_keyboard_device::scan_complete()
{
	if (are_all_keys_up())
	{
		send_key(0x80);
		stop_processing();
	}
}