/*************************************************************************** PC Keyboard connector interface The following basic program can be useful for identifying scancodes: 10 sc%=0:sp%=0 20 sc%=inp(96) 30 if sc%<>sp% then print hex$(sc%):sp%=sc% 40 goto 20 ***************************************************************************/ #include "emu.h" #include "emuopts.h" #include "machine/pc_kbdc.h" //************************************************************************** // GLOBAL VARIABLES //************************************************************************** const device_type PC_KBDC_SLOT = &device_creator; //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // pc_kbdc_slot_device - constructor //------------------------------------------------- pc_kbdc_slot_device::pc_kbdc_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, PC_KBDC_SLOT, "PC_KBDC_SLOT", tag, owner, clock), device_slot_interface(mconfig, *this) { } void pc_kbdc_slot_device::static_set_pc_kbdc_slot(device_t &device, device_t *kbdc_device) { pc_kbdc_slot_device &pc_kbdc = dynamic_cast(device); pc_kbdc.m_kbdc_device = kbdc_device; } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void pc_kbdc_slot_device::device_start() { device_pc_kbd_interface *pc_kbd = dynamic_cast(get_card_device()); if (pc_kbd) { device_pc_kbd_interface::static_set_pc_kbdc( *pc_kbd, m_kbdc_device ); } } //************************************************************************** // GLOBAL VARIABLES //************************************************************************** const device_type PC_KBDC = &device_creator; //------------------------------------------------- // pc_kbdc_device - constructor //------------------------------------------------- pc_kbdc_device::pc_kbdc_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, PC_KBDC, "PC_KBDC", tag, owner, clock), m_clock_state(-1), m_data_state(-1), m_kb_clock_state(1), m_kb_data_state(1), m_keyboard( NULL ) { } //------------------------------------------------- // device_config_complete - perform any // operations now that the configuration is // complete //------------------------------------------------- void pc_kbdc_device::device_config_complete() { // inherit a copy of the static data const pc_kbdc_interface *intf = reinterpret_cast(static_config()); if (intf != NULL) { *static_cast(this) = *intf; } // or initialize to defaults if none provided else { memset(&m_out_clock_cb, 0, sizeof(m_out_clock_cb)); memset(&m_out_data_cb, 0, sizeof(m_out_data_cb)); } } void pc_kbdc_device::set_keyboard( device_pc_kbd_interface *keyboard ) { m_keyboard = keyboard; } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void pc_kbdc_device::device_start() { // resolve callbacks m_out_clock_func.resolve(m_out_clock_cb, *this); m_out_data_func.resolve(m_out_data_cb, *this); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void pc_kbdc_device::device_reset() { m_clock_state = -1; /* initial state of calculated clock line */ m_data_state = -1; /* initial state of calculated data line */ // Initially assume both keyboard and mainboard have released their data and clock lines m_mb_clock_state = 1; m_mb_data_state = 1; m_kb_clock_state = 1; m_kb_data_state = 1; } void pc_kbdc_device::update_clock_state() { int new_clock_state = m_mb_clock_state & m_kb_clock_state; if ( new_clock_state != m_clock_state ) { // We first set our state to prevent possible endless loops m_clock_state = new_clock_state; // Send state to keyboard interface logic on mainboard m_out_clock_func( m_clock_state ); // Send state to keyboard if ( m_keyboard ) { m_keyboard->clock_write( m_clock_state ); } } } void pc_kbdc_device::update_data_state() { int new_data_state = m_mb_data_state & m_kb_data_state; if ( new_data_state != m_data_state ) { // We first set our state to prevent possible endless loops m_data_state = new_data_state; // Send state to keyboard interface logic on mainboard m_out_data_func( m_data_state ); // Send state to keyboard if ( m_keyboard ) { m_keyboard->data_write( m_data_state ); } } } WRITE_LINE_MEMBER( pc_kbdc_device::clock_write_from_mb ) { m_mb_clock_state = state; update_clock_state(); } WRITE_LINE_MEMBER( pc_kbdc_device::data_write_from_mb ) { m_mb_data_state = state; update_data_state(); } WRITE_LINE_MEMBER( pc_kbdc_device::clock_write_from_kb ) { m_kb_clock_state = state; update_clock_state(); } WRITE_LINE_MEMBER( pc_kbdc_device::data_write_from_kb ) { m_kb_data_state = state; update_data_state(); } //************************************************************************** // DEVICE PC KBD INTERFACE //************************************************************************** //------------------------------------------------- // device_pc_kbd_interface - constructor //------------------------------------------------- device_pc_kbd_interface::device_pc_kbd_interface(const machine_config &mconfig, device_t &device) : device_slot_card_interface(mconfig, device), m_pc_kbdc(NULL), m_pc_kbdc_tag(NULL) { } //------------------------------------------------- // ~device_pc_kbd_interface - destructor //------------------------------------------------- device_pc_kbd_interface::~device_pc_kbd_interface() { } WRITE_LINE_MEMBER( device_pc_kbd_interface::clock_write ) { } WRITE_LINE_MEMBER( device_pc_kbd_interface::data_write ) { } void device_pc_kbd_interface::static_set_pc_kbdc(device_t &device, device_t *kbdc_device) { device_pc_kbd_interface &pc_kbd = dynamic_cast(device); pc_kbd.m_pc_kbdc = dynamic_cast(kbdc_device); } void device_pc_kbd_interface::set_pc_kbdc_device() { if ( m_pc_kbdc ) { m_pc_kbdc->set_keyboard( this ); } }