// license:BSD-3-Clause // copyright-holders:Roberto Lavarone /********************************************************************** SMC KR2376 Keyboard Encoder emulation **********************************************************************/ #include "emu.h" #include "kr2376.h" DEFINE_DEVICE_TYPE(KR2376_ST, kr2376_st_device, "kr2376_st", "SMC KR2376-ST Keyboard Encoder") DEFINE_DEVICE_TYPE(KR2376_12, kr2376_12_device, "kr2376_12", "SMC KR2376-12 Keyboard Encoder") kr2376_device::kr2376_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, type, tag, owner, clock), m_read_x(*this, 0x7ff), m_read_shift(*this, 0), m_read_control(*this, 0), m_write_strobe(*this) { } kr2376_st_device::kr2376_st_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : kr2376_device(mconfig, KR2376_ST, tag, owner, clock) { } uint8_t kr2376_st_device::key_codes(int mode, int x, int y) { static const uint8_t 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 } }; return KEY_CODES[mode][x][y]; } kr2376_12_device::kr2376_12_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : kr2376_device(mconfig, KR2376_12, tag, owner, clock) { } uint8_t kr2376_12_device::key_codes(int mode, int x, int y) { static const uint8_t KEY_CODES[3][8][11] = { // normal { // Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8 Y9 Y10 // 3 2 1 RS SUB GS SYN STX NAK DC4 NUL { 0x33, 0x32, 0x31, 0x1e, 0x1a, 0x1d, 0x16, 0x02, 0x15, 0x14, 0x00 }, // X0 // 6 5 4 ] [ ETX CAN GS DEL DLE SOH { 0x36, 0x35, 0x34, 0x5d, 0x5b, 0x03, 0x18, 0x1d, 0x7f, 0x10, 0x01 }, // X1 // 9 8 7 | ~ FS EM ESC SUB HT ACK { 0x39, 0x38, 0x37, 0x7c, 0x7e, 0x1c, 0x19, 0x1b, 0x1a, 0x09, 0x06 }, // X2 // US VT DC1 BS SI HT LF FF CR SP ETB { 0x1f, 0x0b, 0x11, 0x08, 0x0f, 0x09, 0x0a, 0x0c, 0x0d, 0x20, 0x17 }, // X3 // - 0 9 8 7 6 5 4 3 2 1 { 0x2d, 0x30, 0x39, 0x38, 0x37, 0x36, 0x35, 0x34, 0x33, 0x32, 0x31 }, // X4 // \ p o i u y t r e w q { 0x5c, 0x70, 0x6f, 0x69, 0x75, 0x79, 0x74, 0x72, 0x65, 0x77, 0x71 }, // X5 // : ; l k j h g f d s a { 0x3a, 0x3b, 0x6c, 0x6b, 0x6a, 0x68, 0x67, 0x66, 0x64, 0x73, 0x61 }, // X6 // _ / . , m n b v c x z { 0x5f, 0x2f, 0x2e, 0x2c, 0x6d, 0x6e, 0x62, 0x76, 0x63, 0x78, 0x7a } // X7 }, // shift { // Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8 Y9 Y10 // 3 2 1 RS SUB DC2 SYN STX NAK DC4 NUL { 0x33, 0x32, 0x31, 0x1e, 0x1a, 0x12, 0x16, 0x02, 0x15, 0x14, 0x00 }, // X0 // 6 5 4 } { ETX CAN GS DEL DLE SOH { 0x36, 0x35, 0x34, 0x7d, 0x7b, 0x03, 0x18, 0x1d, 0x7f, 0x10, 0x01 }, // X1 // 9 8 7 \ ^ FS EM ESC SUB HT ACK { 0x39, 0x38, 0x37, 0x5c, 0x5e, 0x1c, 0x19, 0x1b, 0x1a, 0x09, 0x06 }, // X2 // US VT DC1 BS SO DC3 LF FF CR SP ETB { 0x1f, 0x0b, 0x11, 0x08, 0x0e, 0x13, 0x0a, 0x0c, 0x0d, 0x20, 0x17 }, // X3 // = 0 ) ( ' & % $ # " ! { 0x3d, 0x30, 0x29, 0x28, 0x27, 0x26, 0x25, 0x24, 0x23, 0x22, 0x21 }, // X4 // @ P O I U Y T R E W Q { 0x40, 0x50, 0x4f, 0x49, 0x55, 0x59, 0x54, 0x52, 0x45, 0x57, 0x51 }, // X5 // * + L K J H G F D S A { 0x2a, 0x2b, 0x4c, 0x4b, 0x4a, 0x48, 0x47, 0x46, 0x44, 0x53, 0x41 }, // X6 // _ ? > < M N B V C X Z { 0x5f, 0x3f, 0x3e, 0x3c, 0x4d, 0x4e, 0x42, 0x56, 0x43, 0x58, 0x5a } // X7 }, // control { // Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 Y8 Y9 Y10 // 3 2 1 RS SUB GS SYN STX NAK DC4 NUL { 0x33, 0x32, 0x31, 0x1e, 0x1a, 0x1d, 0x16, 0x02, 0x15, 0x14, 0x00 }, // X0 // 6 5 4 GS ESC ETX CAN GS DEL DLE SOH { 0x36, 0x35, 0x34, 0x1d, 0x1b, 0x03, 0x18, 0x1d, 0x7f, 0x10, 0x01 }, // X1 // 9 8 7 FS RS FS EM ESC SUB HT ACK { 0x39, 0x38, 0x37, 0x1c, 0x1e, 0x1c, 0x19, 0x1b, 0x1a, 0x09, 0x06 }, // X2 // US VT DC1 BS SI HT LF FF CR SP ETB { 0x1f, 0x0b, 0x11, 0x08, 0x0f, 0x09, 0x0a, 0x0c, 0x0d, 0x20, 0x17 }, // X3 // - 0 9 8 7 6 5 4 3 2 1 { 0x2d, 0x30, 0x39, 0x38, 0x37, 0x36, 0x35, 0x34, 0x33, 0x32, 0x31 }, // X4 // NUL DLE SI HT NAK EM DC4 DC2 ENQ ETB DC1 { 0x00, 0x10, 0x0f, 0x09, 0x15, 0x19, 0x14, 0x12, 0x05, 0x17, 0x11 }, // X5 // : ; FF VT LF BS BEL ACK EOT DC3 SOH { 0x3a, 0x3b, 0x0c, 0x0b, 0x0a, 0x08, 0x07, 0x06, 0x04, 0x13, 0x01 }, // X6 // US / . , CR SO STX SYN ETX CAN SUB { 0x1f, 0x2f, 0x2e, 0x2c, 0x0d, 0x0e, 0x02, 0x16, 0x03, 0x18, 0x1a } // X7 } }; return KEY_CODES[mode][x][y]; } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void kr2376_device::device_start() { /* set initial values */ m_ring11 = 0; m_ring8 = 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(FUNC(kr2376_device::perform_scan), this); 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_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() { if (m_read_x[m_ring8]() == (1 << m_ring11)) { m_strobe = 1; /* strobe 0->1 transition, encode char and update parity */ if (!m_strobe_old) { int i; int parbit; int shift = m_read_shift(); int control = m_read_control(); int table = 0; if (shift) table = 1; else if (control) table = 2; m_data = 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; } } TIMER_CALLBACK_MEMBER(kr2376_device::perform_scan) { change_output_lines(); clock_scan_counters(); detect_keypress(); } /* Keyboard Data */ uint8_t kr2376_device::data_r() { if (m_pins[KR2376_DSII]) return m_data ^ 0xff; else return m_data; }