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// license:BSD-3-Clause
// copyright-holders:AJR
/***************************************************************************
DEC DC305 Printer Controller
This device normally operates at 2 MHz with one wait state. It
generates two vectored interrupts.
***************************************************************************/
#include "emu.h"
#include "dc305.h"
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
// device type definition
DEFINE_DEVICE_TYPE(DC305, dc305_device, "dc305", "DC305 Printer Controller")
//**************************************************************************
// DEVICE IMPLEMENTATION
//**************************************************************************
//-------------------------------------------------
// dc305_device - constructor
//-------------------------------------------------
dc305_device::dc305_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock)
: device_t(mconfig, DC305, tag, owner, clock)
, m_int_callback(*this)
, m_rxc_callback(*this)
, m_txc_callback(*this)
{
}
//-------------------------------------------------
// device_resolve_objects - resolve objects that
// may be needed for other devices to set
// initial conditions at start time
//-------------------------------------------------
void dc305_device::device_resolve_objects()
{
m_int_callback.resolve_safe();
m_rxc_callback.resolve_safe();
m_txc_callback.resolve_safe();
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void dc305_device::device_start()
{
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void dc305_device::device_reset()
{
}
//-------------------------------------------------
// read - read from internal register
//-------------------------------------------------
u8 dc305_device::read(offs_t offset)
{
// TODO
return 0;
}
//-------------------------------------------------
// write - write to internal register
//-------------------------------------------------
void dc305_device::write(offs_t offset, u8 data)
{
// TODO
}
//-------------------------------------------------
// inta - acknowledge and vector interrupt
//-------------------------------------------------
u8 dc305_device::inta()
{
// TODO: generate RST 5, RST 3 or RST 1 if both requested
return 0xff;
}
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