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/***************************************************************************
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<pc_kbdc_slot_device>;
//**************************************************************************
// 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<pc_kbdc_slot_device &>(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<device_pc_kbd_interface *>(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>;
//-------------------------------------------------
// 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<const pc_kbdc_interface *>(static_config());
if (intf != NULL)
{
*static_cast<pc_kbdc_interface *>(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_interface &>(device);
pc_kbd.m_pc_kbdc = dynamic_cast<pc_kbdc_device *>(kbdc_device);
}
void device_pc_kbd_interface::set_pc_kbdc_device()
{
if ( m_pc_kbdc )
{
m_pc_kbdc->set_keyboard( this );
}
}
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