// license:BSD-3-Clause // copyright-holders:Roberto Lavarone /********************************************************************** SMC KR2376 Keyboard Encoder emulation **********************************************************************/ #include "emu.h" #include "kr2376.h" static const uint8_t KR2376_KEY_CODES[3][8][11] = { // normal { // Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8 Y9 Y10 // NUL SOH STX ETX EOT ENQ ACK BEL DC1 P O X0 { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x11, 0x50, 0x30 }, // X0 // DLE K L N M NAK SYN ETB CAN EM SUB X1 { 0x10, 0x4b, 0x4c, 0x4e, 0x4d, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a }, // X1 // - FS GS RS US < > , SP . _ X2 { 0x2d, 0x1c, 0x1d, 0x1e, 0x1f, 0x3c, 0x3e, 0x2c, 0x20, 0x2e, 0x5f }, // X2 // 0 : p _ @ BS [ ] CR LF DEL X3 { 0x30, 0x3a, 0x70, 0x5f, 0x40, 0x08, 0x5B, 0x5d, 0x0d, 0x0a, 0x7f }, // X3 { 0x3b, 0x2f, 0x2e, 0x2c, 0x6d, 0x6e, 0x62, 0x76, 0x63, 0x78, 0x7a }, // X4 { 0x6c, 0x6b, 0x6a, 0x68, 0x67, 0x66, 0x64, 0x73, 0x61, 0x0c, 0x1b }, // X5 { 0x6f, 0x69, 0x75, 0x79, 0x74, 0x72, 0x65, 0x77, 0x71, 0x09, 0x0b }, // X6 { 0x39, 0x38, 0x37, 0x36, 0x35, 0x34, 0x33, 0x32, 0x31, 0x5e, 0x5c } // X7 }, // shift { // Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8 Y9 Y10 // NUL SOH STX ETX EOT ENQ ACK BEL DC1 @ _ X0 { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x11, 0x40, 0x5f }, // X0 // DLE [ \ ^ ] NAK SYN ETB CAN EM SUB X1 { 0x10, 0x5b, 0x5c, 0x5e, 0x5d, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a }, // X1 // = FS GS RS US < > , SP . _ X2 { 0x3d, 0x1c, 0x1d, 0x1e, 0x1f, 0x3c, 0x3e, 0x2c, 0x20, 0x2e, 0x5f }, // X2 // NUL * P DEL ` BS { } CR LF DEL X3 { 0x00, 0x2a, 0x50, 0x7f, 0x60, 0x08, 0x7b, 0x7d, 0x0d, 0x0a, 0x7f }, // X3 { 0x2b, 0x3f, 0x3e, 0x3c, 0x4d, 0x4e, 0x42, 0x56, 0x43, 0x58, 0x5a }, // X4 { 0x4c, 0x4b, 0x4a, 0x48, 0x47, 0x46, 0x44, 0x53, 0x41, 0x0c, 0x1b }, // X5 { 0x4f, 0x49, 0x55, 0x59, 0x54, 0x52, 0x45, 0x57, 0x51, 0x09, 0x0b }, // X6 { 0x29, 0x28, 0x27, 0x26, 0x25, 0x24, 0x23, 0x22, 0x21, 0x7e, 0x7c } // X7 }, // control { // Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8 Y9 Y10 // NUL SOH STX ETX EOT ENQ ACK BEL DC1 DLE SI X0 { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x11, 0x10, 0x0f }, // X0 // DLE VT FF SO CR NAK SYN ETB CAN EM SUB X1 { 0x10, 0x0b, 0x0c, 0x0e, 0x0d, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a }, // X1 // NUL FS GS RS US NUL NUL NUL SP NUL US X2 { 0x00, 0x1c, 0x1d, 0x1e, 0x1f, 0x00, 0x00, 0x00, 0x20, 0x00, 0x1f }, // X2 // NUL NUL DLE US NUL BS ESC GS CR LF DEL X3 { 0x00, 0x00, 0x10, 0x1f, 0x00, 0x08, 0x1B, 0x1d, 0x0d, 0x0a, 0x7f }, // X3 { 0x00, 0x00, 0x00, 0x00, 0x1d, 0x0e, 0x02, 0x16, 0x03, 0x18, 0x1a }, // X4 { 0x0c, 0x0b, 0x0a, 0x08, 0x07, 0x06, 0x04, 0x13, 0x01, 0x0c, 0x1b }, // X5 { 0x1f, 0x09, 0x15, 0x19, 0x14, 0x12, 0x05, 0x17, 0x11, 0x09, 0x0b }, // X6 { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1e, 0x1c } // X7 } }; DEFINE_DEVICE_TYPE(KR2376, kr2376_device, "kr2376", "SMC KR2376 Keyboard Encoder") kr2376_device::kr2376_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, KR2376, tag, owner, clock), m_write_strobe(*this) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void kr2376_device::device_start() { m_write_strobe.resolve_safe(); /* set initial values */ m_ring11 = 0; m_ring8 = 0; m_modifiers = 0; m_strobe = 0; m_strobe_old = 0; m_parity = 0; m_data = 0; memset(m_pins, 0x00, sizeof(m_pins)); change_output_lines(); /* create the timers */ m_scan_timer = timer_alloc(TIMER_SCAN_TICK); m_scan_timer->adjust(attotime::zero, 0, attotime::from_hz(clock())); /* register for state saving */ save_item(NAME(m_pins)); save_item(NAME(m_ring11)); save_item(NAME(m_ring8)); save_item(NAME(m_modifiers)); save_item(NAME(m_strobe)); save_item(NAME(m_strobe_old)); save_item(NAME(m_parity)); save_item(NAME(m_data)); } /*------------------------------------------------- set_input_pin - set an input pin -------------------------------------------------*/ void kr2376_device::set_input_pin( input_pin_t pin, int data ) { data = data ? 1 : 0; switch ( pin ) { case KR2376_PII: case KR2376_DSII: m_pins[pin] = data; break; } } /*------------------------------------------------- get_output_pin - get the status of an output pin -------------------------------------------------*/ int kr2376_device::get_output_pin( output_pin_t pin ) { return m_pins[pin]; } void kr2376_device::change_output_lines() { if (m_strobe != m_strobe_old) { m_strobe_old = m_strobe; if (m_strobe) // strobe 0 --> 1 transition { /* update parity */ m_pins[KR2376_PO] = m_parity ^ m_pins[KR2376_PII]; } m_pins[KR2376_SO] = m_strobe ^ m_pins[KR2376_DSII]; m_write_strobe(m_strobe ^ m_pins[KR2376_DSII]); } } void kr2376_device::clock_scan_counters() { /* ring counters inhibited while strobe active */ if (!m_strobe) { m_ring11++; if (m_ring11 == 11) { m_ring11 = 0; m_ring8++; if (m_ring8 == 8) m_ring8 = 0; } } } void kr2376_device::detect_keypress() { static const char *const keynames[] = { "X0", "X1", "X2", "X3", "X4", "X5", "X6", "X7" }; if (ioport(keynames[m_ring8])->read() == (1 << m_ring11)) { m_modifiers = ioport("MODIFIERS")->read(); m_strobe = 1; /* strobe 0->1 transition, encode char and update parity */ if (!m_strobe_old) { int i; int parbit; int shift = BIT(m_modifiers, 0); int control = BIT(m_modifiers, 1); int alpha = BIT(m_modifiers, 2); int table = 0; if (shift || alpha) table = 1; else if (control) table = 2; m_data = KR2376_KEY_CODES[table][m_ring8][m_ring11]; /* Compute ODD parity */ m_parity = m_data; parbit = 0; for (i=0; i<8; i++) parbit ^= (m_parity >> i) & 1; m_parity = parbit; } } else { m_strobe = 0; } } void kr2376_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) { switch (id) { case TIMER_SCAN_TICK: change_output_lines(); clock_scan_counters(); detect_keypress(); break; } } /* Keyboard Data */ READ8_MEMBER( kr2376_device::data_r ) { if (m_pins[KR2376_DSII]) return m_data ^ 0xff; else return m_data; } /* Input Ports */ INPUT_PORTS_START( kr2376 ) PORT_START("X0") PORT_BIT( 0x0001, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0002, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0004, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0008, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0010, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0020, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0040, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0080, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0100, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0200, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0400, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_START("X1") PORT_BIT( 0x0001, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0002, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0004, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0008, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0010, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0020, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0040, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0080, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0100, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0200, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0400, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_START("X2") PORT_BIT( 0x0001, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('=') PORT_BIT( 0x0002, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0004, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0008, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0010, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0020, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0040, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0080, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0100, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ') PORT_BIT( 0x0200, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0400, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CHAR('_') PORT_START("X3") PORT_BIT( 0x0001, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_BIT( 0x0002, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_COLON) PORT_CHAR(':') PORT_CHAR('*') PORT_BIT( 0x0004, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P') PORT_BIT( 0x0008, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0010, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR('`') PORT_CHAR('@') PORT_BIT( 0x0020, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8) PORT_NAME("Del") PORT_BIT( 0x0040, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('[') PORT_CHAR('{') PORT_BIT( 0x0080, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR(']') PORT_CHAR('}') PORT_BIT( 0x0100, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13) PORT_NAME("CR") PORT_BIT( 0x0200, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_HOME) PORT_CHAR(UCHAR_MAMEKEY(HOME)) PORT_CHAR(10) PORT_NAME("LF") PORT_BIT( 0x0400, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_START("X4") PORT_BIT( 0x0001, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR('+') PORT_BIT( 0x0002, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?') PORT_BIT( 0x0004, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>') PORT_BIT( 0x0008, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<') PORT_BIT( 0x0010, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M') PORT_BIT( 0x0020, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N') PORT_BIT( 0x0040, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B') PORT_BIT( 0x0080, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V') PORT_BIT( 0x0100, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C') PORT_BIT( 0x0200, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X') PORT_BIT( 0x0400, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z') PORT_START("X5") PORT_BIT( 0x0001, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L') PORT_BIT( 0x0002, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K') PORT_BIT( 0x0004, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J') PORT_BIT( 0x0008, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H') PORT_BIT( 0x0010, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_G) PORT_CHAR('c') PORT_CHAR('G') PORT_BIT( 0x0020, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F') PORT_BIT( 0x0040, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D') PORT_BIT( 0x0080, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S') PORT_BIT( 0x0100, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A') PORT_BIT( 0x0200, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x0400, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_ESC) PORT_CHAR(UCHAR_MAMEKEY(ESC)) PORT_START("X6") PORT_BIT( 0x0001, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O') PORT_BIT( 0x0002, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I') PORT_BIT( 0x0004, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U') PORT_BIT( 0x0008, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y') PORT_BIT( 0x0010, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T') PORT_BIT( 0x0020, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R') PORT_BIT( 0x0040, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E') PORT_BIT( 0x0080, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W') PORT_BIT( 0x0100, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q') PORT_START("X7") PORT_BIT( 0x0001, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')') PORT_BIT( 0x0002, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('(') PORT_BIT( 0x0004, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('\'') PORT_BIT( 0x0008, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&') PORT_BIT( 0x0010, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%') PORT_BIT( 0x0020, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$') PORT_BIT( 0x0040, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#') PORT_BIT( 0x0080, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('"') PORT_BIT( 0x0100, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!') PORT_BIT( 0x0200, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_TILDE) PORT_CHAR('^') PORT_CHAR('~') PORT_BIT( 0x0400, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR('\\') PORT_CHAR('|') PORT_START("MODIFIERS") PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1) PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_LCONTROL) PORT_CODE(KEYCODE_RCONTROL) PORT_CHAR(UCHAR_MAMEKEY(LCONTROL)) PORT_CHAR(UCHAR_MAMEKEY(RCONTROL)) PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_CAPSLOCK) PORT_CHAR(UCHAR_MAMEKEY(CAPSLOCK)) INPUT_PORTS_END //------------------------------------------------- // input_ports - device-specific input ports //------------------------------------------------- ioport_constructor kr2376_device::device_input_ports() const { return INPUT_PORTS_NAME( kr2376 ); }