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Diffstat (limited to 'src/mess/machine/x820kb.c')
-rw-r--r--src/mess/machine/x820kb.c387
1 files changed, 0 insertions, 387 deletions
diff --git a/src/mess/machine/x820kb.c b/src/mess/machine/x820kb.c
deleted file mode 100644
index 115e8591e4a..00000000000
--- a/src/mess/machine/x820kb.c
+++ /dev/null
@@ -1,387 +0,0 @@
-// license:BSD-3-Clause
-// copyright-holders:Curt Coder
-/**********************************************************************
-
- Xerox 820/820-II ASCII keyboard emulation
-
-*********************************************************************/
-
-/*
-
-PCB Layout
-----------
-
-Maxi-Switch Co.
-630107-02
-
-|-----------------------------------------------------------------------|
-| |--CN1--| CN2 |
-| 8748 6MHz 74154 * |
-| |
-|-----------------------------------------------------------------------|
-
-Notes:
- All IC's shown.
-
- 8048 - NEC D8748D
- 74154 - 4-line to 16-line decoder/multiplexer
- * - unpopulated 8-pin chip
- CN1 - 2x16 PCB header
- CN2 - unpopulated RJ-45? connector
-
-*/
-
-/*
-
- TODO:
-
- - repeat
- - what are T0/T1/INT?
-
-*/
-
-#include "x820kb.h"
-
-
-
-//**************************************************************************
-// MACROS / CONSTANTS
-//**************************************************************************
-
-#define I8748_TAG "i8748"
-
-
-
-//**************************************************************************
-// DEVICE DEFINITIONS
-//**************************************************************************
-
-const device_type XEROX_820_KEYBOARD = &device_creator<xerox_820_keyboard_t>;
-
-
-//-------------------------------------------------
-// ROM( xerox_820_keyboard )
-//-------------------------------------------------
-
-ROM_START( xerox_820_keyboard )
- ROM_REGION( 0x400, I8748_TAG, 0 )
- ROM_LOAD( "820iikey.bin", 0x000, 0x400, CRC(8ea3b39b) SHA1(3f05959f54a558b273567b1b4f0c7cdf46d8d9bf) )
-ROM_END
-
-
-//-------------------------------------------------
-// rom_region - device-specific ROM region
-//-------------------------------------------------
-
-const rom_entry *xerox_820_keyboard_t::device_rom_region() const
-{
- return ROM_NAME( xerox_820_keyboard );
-}
-
-
-//-------------------------------------------------
-// ADDRESS_MAP( kb_io )
-//-------------------------------------------------
-
-static ADDRESS_MAP_START( xerox_820_keyboard_io, AS_IO, 8, xerox_820_keyboard_t )
- AM_RANGE(MCS48_PORT_P1, MCS48_PORT_P1) AM_READWRITE(kb_p1_r, kb_p1_w)
- AM_RANGE(MCS48_PORT_P2, MCS48_PORT_P2) AM_READ(kb_p2_r) AM_WRITENOP
- AM_RANGE(MCS48_PORT_T0, MCS48_PORT_T0) AM_READ(kb_t0_r)
- AM_RANGE(MCS48_PORT_T0, MCS48_PORT_T1) AM_READ(kb_t1_r)
- AM_RANGE(MCS48_PORT_BUS, MCS48_PORT_BUS) AM_WRITE(kb_bus_w)
-ADDRESS_MAP_END
-
-
-//-------------------------------------------------
-// MACHINE_DRIVER( xerox_820_keyboard )
-//-------------------------------------------------
-
-static MACHINE_CONFIG_FRAGMENT( xerox_820_keyboard )
- MCFG_CPU_ADD(I8748_TAG, I8048, XTAL_6MHz)
- MCFG_CPU_IO_MAP(xerox_820_keyboard_io)
-MACHINE_CONFIG_END
-
-
-//-------------------------------------------------
-// machine_config_additions - device-specific
-// machine configurations
-//-------------------------------------------------
-
-machine_config_constructor xerox_820_keyboard_t::device_mconfig_additions() const
-{
- return MACHINE_CONFIG_NAME( xerox_820_keyboard );
-}
-
-
-//-------------------------------------------------
-// INPUT_PORTS( xerox_820_keyboard )
-//-------------------------------------------------
-
-INPUT_PORTS_START( xerox_820_keyboard )
- PORT_START("Y0")
- 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("Y1")
- 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_NAME("ESC") PORT_CODE(KEYCODE_ESC) PORT_CHAR(UCHAR_MAMEKEY(ESC))
- PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_PLUS_PAD) PORT_CHAR(UCHAR_MAMEKEY(PLUS_PAD))
- PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_4_PAD) PORT_CHAR(UCHAR_MAMEKEY(4_PAD))
-
- PORT_START("Y2")
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_2_PAD) PORT_CHAR(UCHAR_MAMEKEY(2_PAD))
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_1_PAD) PORT_CHAR(UCHAR_MAMEKEY(1_PAD))
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(UTF8_UP) PORT_CODE(KEYCODE_UP) PORT_CHAR(UCHAR_MAMEKEY(UP))
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("LINE FEED") PORT_CODE(KEYCODE_ENTER_PAD) PORT_CHAR(UCHAR_MAMEKEY(ENTER_PAD))
- PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("RETURN") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13)
- PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR('\'') PORT_CHAR('"') PORT_CHAR('`')
- PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR(':') PORT_CHAR('~')
- PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L')
-
- PORT_START("Y3")
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad .")
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_0_PAD) PORT_CHAR(UCHAR_MAMEKEY(0_PAD))
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(UTF8_RIGHT) PORT_CODE(KEYCODE_RIGHT) PORT_CHAR(UCHAR_MAMEKEY(RIGHT))
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(UTF8_DOWN) PORT_CODE(KEYCODE_DOWN) PORT_CHAR(UCHAR_MAMEKEY(DOWN))
- PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(UTF8_LEFT) PORT_CODE(KEYCODE_LEFT) PORT_CHAR(UCHAR_MAMEKEY(LEFT))
- PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?') PORT_CHAR('\\')
- PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>')
- PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
-
- PORT_START("Y4")
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_3_PAD) PORT_CHAR(UCHAR_MAMEKEY(3_PAD))
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_UNUSED ) // ; =
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_UNUSED ) // : < >
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_6_PAD) PORT_CHAR(UCHAR_MAMEKEY(6_PAD))
- PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_9_PAD) PORT_CHAR(UCHAR_MAMEKEY(9_PAD))
- PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_5_PAD) PORT_CHAR(UCHAR_MAMEKEY(5_PAD))
- PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_8_PAD) PORT_CHAR(UCHAR_MAMEKEY(8_PAD))
- PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_7_PAD) PORT_CHAR(UCHAR_MAMEKEY(7_PAD))
-
- PORT_START("Y5")
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('*')
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_9) PORT_CHAR('0') PORT_CHAR(')')
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_0) PORT_CHAR('9') PORT_CHAR('(')
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('_')
- PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=') PORT_CHAR('+')
- PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("BACK SPACE") PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8)
- PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("DEL") PORT_CODE(KEYCODE_DEL) PORT_CHAR(UCHAR_MAMEKEY(DEL))
- PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Keypad -") PORT_CODE(KEYCODE_MINUS_PAD) PORT_CHAR(UCHAR_MAMEKEY(MINUS_PAD))
-
- PORT_START("Y6")
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('&')
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('^')
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_5) PORT_CHAR('5') 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_3) PORT_CHAR('3') PORT_CHAR('#')
- PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('@')
- PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
- PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("HELP") PORT_CODE(KEYCODE_TILDE)
-
- PORT_START("Y7")
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U')
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y')
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T')
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R')
- PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E')
- PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W')
- PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q')
- PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("TAB") PORT_CODE(KEYCODE_TAB) PORT_CHAR(UCHAR_MAMEKEY(TAB))
-
- PORT_START("Y8")
- 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("YF")
- PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("LOCK") PORT_CODE(KEYCODE_CAPSLOCK) PORT_CHAR(UCHAR_MAMEKEY(CAPSLOCK)) PORT_TOGGLE
- PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
- PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Left CTRL") PORT_CODE(KEYCODE_LCONTROL) PORT_CHAR(UCHAR_MAMEKEY(LCONTROL))
- PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_UNUSED )
- PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_UNUSED )
- PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_UNUSED )
- PORT_BIT( 0x40, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("Right CTRL") PORT_CODE(KEYCODE_RCONTROL) PORT_CHAR(UCHAR_MAMEKEY(RCONTROL))
- PORT_BIT( 0x80, IP_ACTIVE_LOW, IPT_UNUSED )
-INPUT_PORTS_END
-
-
-//-------------------------------------------------
-// input_ports - device-specific input ports
-//-------------------------------------------------
-
-ioport_constructor xerox_820_keyboard_t::device_input_ports() const
-{
- return INPUT_PORTS_NAME( xerox_820_keyboard );
-}
-
-
-
-//**************************************************************************
-// LIVE DEVICE
-//**************************************************************************
-
-//-------------------------------------------------
-// xerox_820_keyboard_t - constructor
-//-------------------------------------------------
-
-xerox_820_keyboard_t::xerox_820_keyboard_t(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
- device_t(mconfig, XEROX_820_KEYBOARD, "Xerox 820 Keyboard", tag, owner, clock, "x820kb", __FILE__),
- m_maincpu(*this, I8748_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_yf(*this, "YF"),
- m_kbstb_cb(*this),
- m_p1(0xff),
- m_bus(0xff)
-{
-}
-
-
-//-------------------------------------------------
-// device_start - device-specific startup
-//-------------------------------------------------
-
-void xerox_820_keyboard_t::device_start()
-{
- // state saving
- save_item(NAME(m_p1));
- save_item(NAME(m_bus));
-}
-
-
-//-------------------------------------------------
-// device_reset - device-specific reset
-//-------------------------------------------------
-
-void xerox_820_keyboard_t::device_reset()
-{
- m_kbstb_cb.resolve_safe();
-}
-
-void xerox_820_keyboard_t::device_reset_after_children()
-{
- m_maincpu->set_input_line(MCS48_INPUT_IRQ, ASSERT_LINE);
-}
-
-
-//-------------------------------------------------
-// kb_p1_r -
-//-------------------------------------------------
-
-READ8_MEMBER( xerox_820_keyboard_t::kb_p1_r )
-{
- return m_p1; // TODO: move to mcs48.c
-}
-
-
-//-------------------------------------------------
-// kb_p1_w -
-//-------------------------------------------------
-
-WRITE8_MEMBER( xerox_820_keyboard_t::kb_p1_w )
-{
- /*
-
- bit description
-
- 0 A0
- 1 A1
- 2 A2
- 3 A3
- 4 KBSTB
- 5
- 6
- 7 ? (toggled if T1=0)
-
- */
-
- m_p1 = data;
-
- m_kbstb_cb(BIT(data, 4) ? CLEAR_LINE : ASSERT_LINE);
-}
-
-
-//-------------------------------------------------
-// kb_p2_r -
-//-------------------------------------------------
-
-READ8_MEMBER( xerox_820_keyboard_t::kb_p2_r )
-{
- UINT8 data = 0xff;
-
- switch (m_p1 & 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 0xf: data &= m_yf->read(); break;
- }
-
- return data;
-}
-
-
-//-------------------------------------------------
-// kb_t0_r -
-//-------------------------------------------------
-
-READ8_MEMBER( xerox_820_keyboard_t::kb_t0_r )
-{
- UINT8 data = 1;
-
- switch (m_p1 & 0x0f)
- {
- case 0xd: data = 1; break; // ??? if 0, return key data | 0x80
- case 0xe: data = 1; break; // ??? if 0, set r6=1
- }
-
- return data;
-}
-
-
-//-------------------------------------------------
-// kb_t1_r -
-//-------------------------------------------------
-
-READ8_MEMBER( xerox_820_keyboard_t::kb_t1_r )
-{
- return 1; // ??? if 0, toggle P17
-}
-
-
-//-------------------------------------------------
-// kb_bus_w -
-//-------------------------------------------------
-
-WRITE8_MEMBER( xerox_820_keyboard_t::kb_bus_w )
-{
- m_bus = data;
-}