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// license:GPL-2.0+
// copyright-holders:Dirk Best
/***************************************************************************
Thomson EF9369
***************************************************************************/
#include "emu.h"
#include "ef9369.h"
#include <algorithm>
/*static*/ constexpr int ef9369_device::NUMCOLORS;
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
DEFINE_DEVICE_TYPE(EF9369, ef9369_device, "ef9369", "Thomson EF9369 Single Chip Color Palette")
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// ef9369_device - constructor
//-------------------------------------------------
ef9369_device::ef9369_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, EF9369, tag, owner, clock)
, m_address(0)
{
std::fill(m_ca, m_ca + NUMCOLORS, 0);
std::fill(m_cb, m_cb + NUMCOLORS, 0);
std::fill(m_cc, m_cc + NUMCOLORS, 0);
std::fill(m_m, m_m + NUMCOLORS, 0);
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void ef9369_device::device_start()
{
// bind delegate
m_color_update_cb.bind_relative_to(*owner());
// register for save states
save_pointer(NAME(m_ca), NUMCOLORS);
save_pointer(NAME(m_cb), NUMCOLORS);
save_pointer(NAME(m_cc), NUMCOLORS);
save_pointer(NAME(m_m), NUMCOLORS);
save_item(NAME(m_address));
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void ef9369_device::device_reset()
{
m_address = 0;
}
//**************************************************************************
// IMPLEMENTATION
//**************************************************************************
READ8_MEMBER( ef9369_device::data_r )
{
if (m_address & 1)
return m_m[m_address >> 1] << 4 | m_cc[m_address >> 1];
else
return m_cb[m_address >> 1] << 4 | m_ca[m_address >> 1];
}
WRITE8_MEMBER( ef9369_device::data_w )
{
const int entry = m_address >> 1;
if (m_address & 1)
{
m_m[entry] = (data >> 4) & 0x1;
m_cc[entry] = (data >> 0) & 0xf;
}
else
{
m_cb[entry] = (data >> 4) & 0xf;
m_ca[entry] = (data >> 0) & 0xf;
}
// update color
if (!m_color_update_cb.isnull())
m_color_update_cb(entry, m_m[entry], m_ca[entry], m_cb[entry], m_cc[entry]);
// auto-increment
m_address++;
m_address &= 0x1f;
}
WRITE8_MEMBER( ef9369_device::address_w )
{
m_address = data & 0x1f; // 5-bit
}
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