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-rw-r--r--src/devices/bus/adamnet/kb.c425
1 files changed, 425 insertions, 0 deletions
diff --git a/src/devices/bus/adamnet/kb.c b/src/devices/bus/adamnet/kb.c
new file mode 100644
index 00000000000..a9cc31b8edf
--- /dev/null
+++ b/src/devices/bus/adamnet/kb.c
@@ -0,0 +1,425 @@
+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/**********************************************************************
+
+ Coleco Adam keyboard emulation
+
+**********************************************************************/
+
+#include "kb.h"
+
+
+
+//**************************************************************************
+// MACROS / CONSTANTS
+//**************************************************************************
+
+#define M6801_TAG "u2"
+
+
+
+//**************************************************************************
+// DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type ADAM_KB = &device_creator<adam_keyboard_device>;
+
+
+//-------------------------------------------------
+// ROM( adam_kb )
+//-------------------------------------------------
+
+ROM_START( adam_kb )
+ ROM_REGION( 0x800, M6801_TAG, 0 )
+ ROM_LOAD( "keyboard.u2", 0x000, 0x800, CRC(ef204746) SHA1(83162ffc75847328a05429135b728a63efb05b93) )
+ROM_END
+
+
+//-------------------------------------------------
+// rom_region - device-specific ROM region
+//-------------------------------------------------
+
+const rom_entry *adam_keyboard_device::device_rom_region() const
+{
+ return ROM_NAME( adam_kb );
+}
+
+
+//-------------------------------------------------
+// ADDRESS_MAP( adam_kb_mem )
+//-------------------------------------------------
+
+static ADDRESS_MAP_START( adam_kb_mem, AS_PROGRAM, 8, adam_keyboard_device )
+ AM_RANGE(0x0000, 0x001f) AM_DEVREADWRITE(M6801_TAG, m6801_cpu_device, m6801_io_r, m6801_io_w)
+ AM_RANGE(0x0080, 0x00ff) AM_RAM
+ AM_RANGE(0xf800, 0xffff) AM_ROM AM_REGION(M6801_TAG, 0)
+ADDRESS_MAP_END
+
+
+//-------------------------------------------------
+// ADDRESS_MAP( adam_kb_io )
+//-------------------------------------------------
+
+static ADDRESS_MAP_START( adam_kb_io, AS_IO, 8, adam_keyboard_device )
+ AM_RANGE(M6801_PORT1, M6801_PORT1) AM_READ(p1_r)
+ AM_RANGE(M6801_PORT2, M6801_PORT2) AM_READWRITE(p2_r, p2_w)
+ AM_RANGE(M6801_PORT3, M6801_PORT3) AM_READWRITE(p3_r, p3_w)
+ AM_RANGE(M6801_PORT4, M6801_PORT4) AM_READWRITE(p4_r, p4_w)
+ADDRESS_MAP_END
+
+
+//-------------------------------------------------
+// MACHINE_DRIVER( adam_kb )
+//-------------------------------------------------
+
+static MACHINE_CONFIG_FRAGMENT( adam_kb )
+ MCFG_CPU_ADD(M6801_TAG, M6801, XTAL_4MHz)
+ MCFG_CPU_PROGRAM_MAP(adam_kb_mem)
+ MCFG_CPU_IO_MAP(adam_kb_io)
+MACHINE_CONFIG_END
+
+
+//-------------------------------------------------
+// machine_config_additions - device-specific
+// machine configurations
+//-------------------------------------------------
+
+machine_config_constructor adam_keyboard_device::device_mconfig_additions() const
+{
+ return MACHINE_CONFIG_NAME( adam_kb );
+}
+
+
+//-------------------------------------------------
+// INPUT_PORTS( adam_kb )
+//-------------------------------------------------
+
+static INPUT_PORTS_START( adam_kb )
+ PORT_START("Y0")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("WILD CARD") PORT_CODE(KEYCODE_F7)
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("I") PORT_CODE(KEYCODE_F1)
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("II") PORT_CODE(KEYCODE_F2)
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("III") PORT_CODE(KEYCODE_F3)
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("IV") PORT_CODE(KEYCODE_F4)
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("V") PORT_CODE(KEYCODE_F5)
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("VI") PORT_CODE(KEYCODE_F6)
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("UNDO") PORT_CODE(KEYCODE_F8)
+
+ PORT_START("Y1")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('@')
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#')
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$')
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('_')
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('&')
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('*')
+
+ PORT_START("Y2")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("TAB") PORT_CODE(KEYCODE_TAB) PORT_CHAR('\t')
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q')
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W')
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E')
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R')
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T')
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y')
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U')
+
+ PORT_START("Y3")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A')
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S')
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D')
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F')
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G')
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H')
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J')
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K')
+
+ PORT_START("Y4")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z')
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X')
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C')
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V')
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B')
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N')
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M')
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<')
+
+ PORT_START("Y5")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR('(')
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHAR(')')
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('\'')
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('+') PORT_CHAR('=')
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_TILDE) PORT_CHAR('^') PORT_CHAR('~')
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L')
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR(':')
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR('\'') PORT_CHAR('\"')
+
+ PORT_START("Y6")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I')
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O')
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P')
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('[') PORT_CHAR('{')
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR(']') PORT_CHAR('}')
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>')
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?')
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("RETURN") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13)
+
+ PORT_START("Y7")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR('\\') PORT_CHAR('|')
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("ESCAPE/WP") PORT_CODE(KEYCODE_ESC) PORT_CHAR(UCHAR_MAMEKEY(ESC))
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNUSED )
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNUSED )
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Space") PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("MOVE/COPY") PORT_CODE(KEYCODE_INSERT) PORT_CHAR(UCHAR_MAMEKEY(INSERT))
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("STORE/GET") PORT_CODE(KEYCODE_HOME) PORT_CHAR(UCHAR_MAMEKEY(HOME))
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("CLEAR") PORT_CODE(KEYCODE_PGUP) PORT_CHAR(UCHAR_MAMEKEY(PGUP))
+
+ PORT_START("Y8")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(UTF8_UP) PORT_CODE(KEYCODE_UP) PORT_CHAR(UCHAR_MAMEKEY(UP))
+ PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(UTF8_RIGHT) PORT_CODE(KEYCODE_RIGHT) PORT_CHAR(UCHAR_MAMEKEY(RIGHT))
+ PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(UTF8_DOWN) PORT_CODE(KEYCODE_DOWN) PORT_CHAR(UCHAR_MAMEKEY(DOWN))
+ PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(UTF8_LEFT) PORT_CODE(KEYCODE_LEFT) PORT_CHAR(UCHAR_MAMEKEY(LEFT))
+ PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("BACKSPACE") PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8)
+ PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("INSERT") PORT_CODE(KEYCODE_DEL) PORT_CHAR(UCHAR_MAMEKEY(DEL))
+ PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("PRINT") PORT_CODE(KEYCODE_END) PORT_CHAR(UCHAR_MAMEKEY(END))
+ PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("DELETE") PORT_CODE(KEYCODE_PGDN) PORT_CHAR(UCHAR_MAMEKEY(PGDN))
+
+ PORT_START("Y9")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("CONTROL") PORT_CODE(KEYCODE_LCONTROL) PORT_CHAR(UCHAR_MAMEKEY(LCONTROL))
+ PORT_BIT( 0xfe, IP_ACTIVE_LOW, IPT_UNUSED )
+
+ PORT_START("Y10")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("SHIFT") PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
+ PORT_BIT( 0xfe, IP_ACTIVE_LOW, IPT_UNUSED )
+
+ PORT_START("Y11")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("LOCK") PORT_CODE(KEYCODE_CAPSLOCK) PORT_CHAR(UCHAR_MAMEKEY(CAPSLOCK))
+ PORT_BIT( 0xfe, IP_ACTIVE_LOW, IPT_UNUSED )
+
+ PORT_START("Y12")
+ PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("HOME") PORT_CODE(KEYCODE_F9)
+ PORT_BIT( 0xfe, IP_ACTIVE_LOW, IPT_UNUSED )
+INPUT_PORTS_END
+
+
+//-------------------------------------------------
+// input_ports - device-specific input ports
+//-------------------------------------------------
+
+ioport_constructor adam_keyboard_device::device_input_ports() const
+{
+ return INPUT_PORTS_NAME( adam_kb );
+}
+
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+// adam_keyboard_device - constructor
+//-------------------------------------------------
+
+adam_keyboard_device::adam_keyboard_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : device_t(mconfig, ADAM_KB, "Adam keyboard", tag, owner, clock, "adam_kb", __FILE__),
+ device_adamnet_card_interface(mconfig, *this),
+ m_maincpu(*this, M6801_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_y10(*this, "Y10"),
+ m_y11(*this, "Y11"),
+ m_y12(*this, "Y12"),
+ m_key_y(0x1ff)
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void adam_keyboard_device::device_start()
+{
+ // state saving
+ save_item(NAME(m_key_y));
+}
+
+
+//-------------------------------------------------
+// adamnet_reset_w -
+//-------------------------------------------------
+
+void adam_keyboard_device::adamnet_reset_w(int state)
+{
+ m_maincpu->set_input_line(INPUT_LINE_RESET, state);
+}
+
+
+//-------------------------------------------------
+// p1_r -
+//-------------------------------------------------
+
+READ8_MEMBER( adam_keyboard_device::p1_r )
+{
+ /*
+
+ bit description
+
+ 0 X0
+ 1 X1
+ 2 X2
+ 3 X3
+ 4 X4
+ 5 X5
+ 6 X6
+ 7 X7
+
+ */
+
+ UINT8 data = 0xff;
+
+ if (!BIT(m_key_y, 0)) data &= m_y0->read();
+ if (!BIT(m_key_y, 1)) data &= m_y1->read();
+ if (!BIT(m_key_y, 2)) data &= m_y2->read();
+ if (!BIT(m_key_y, 3)) data &= m_y3->read();
+ if (!BIT(m_key_y, 4)) data &= m_y4->read();
+ if (!BIT(m_key_y, 5)) data &= m_y5->read();
+ if (!BIT(m_key_y, 6)) data &= m_y6->read();
+ if (!BIT(m_key_y, 7)) data &= m_y7->read();
+ if (!BIT(m_key_y, 8)) data &= m_y8->read();
+ if (!BIT(m_key_y, 9)) data &= m_y9->read();
+ if (!BIT(m_key_y, 10)) data &= m_y10->read();
+ if (!BIT(m_key_y, 11)) data &= m_y11->read();
+ if (!BIT(m_key_y, 12)) data &= m_y12->read();
+
+ return data;
+}
+
+
+//-------------------------------------------------
+// p2_r -
+//-------------------------------------------------
+
+READ8_MEMBER( adam_keyboard_device::p2_r )
+{
+ /*
+
+ bit description
+
+ 0 mode bit 0
+ 1 mode bit 1
+ 2 mode bit 2
+ 3 NET RXD
+ 4
+
+ */
+
+ UINT8 data = M6801_MODE_7;
+
+ // NET RXD
+ data |= m_bus->rxd_r(this) << 3;
+
+ return data;
+}
+
+
+//-------------------------------------------------
+// p2_w -
+//-------------------------------------------------
+
+WRITE8_MEMBER( adam_keyboard_device::p2_w )
+{
+ /*
+
+ bit description
+
+ 0
+ 1
+ 2
+ 3
+ 4 NET TXD
+
+ */
+
+ m_bus->txd_w(this, BIT(data, 4));
+}
+
+
+//-------------------------------------------------
+// p3_r -
+//-------------------------------------------------
+
+READ8_MEMBER( adam_keyboard_device::p3_r )
+{
+ return 0xff;
+}
+
+
+//-------------------------------------------------
+// p3_w -
+//-------------------------------------------------
+
+WRITE8_MEMBER( adam_keyboard_device::p3_w )
+{
+ /*
+
+ bit description
+
+ 0 Y0
+ 1 Y1
+ 2 Y2
+ 3 Y3
+ 4 Y4
+ 5 Y5
+ 6 Y6
+ 7 Y7
+
+ */
+
+ m_key_y = (m_key_y & 0x1f00) | data;
+}
+
+
+//-------------------------------------------------
+// p4_r -
+//-------------------------------------------------
+
+READ8_MEMBER( adam_keyboard_device::p4_r )
+{
+ return 0xff;
+}
+
+
+//-------------------------------------------------
+// p4_w -
+//-------------------------------------------------
+
+WRITE8_MEMBER( adam_keyboard_device::p4_w )
+{
+ /*
+
+ bit description
+
+ 0 Y8
+ 1 Y9
+ 2 Y10
+ 3 Y11
+ 4 Y12
+ 5
+ 6
+ 7
+
+ */
+
+ m_key_y = ((data & 0x1f) << 8) | (m_key_y & 0xff);
+}