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// license:BSD-3-Clause
// copyright-holders:AJR
/***************************************************************************
Kawasaki Steel (Kawatetsu) KL5C80A16 CPU
Important functional blocks:
— MMU
— DMA controller (KP27) (unemulated)
— UART (KP61) (unemulated)
— Synchronous serial port (KP62) (unemulated)
— 16-bit timer/counters (KP63A)
— 16-level interrupt controller (KP69)
— Parallel ports (KP67)
— External bus/DRAM interface unit (unemulated)
***************************************************************************/
#include "emu.h"
#include "kl5c80a16.h"
#include "kp63.h"
// device type definition
DEFINE_DEVICE_TYPE(KL5C80A16, kl5c80a16_device, "kl5c80a16", "Kawasaki Steel KL5C80A16")
static const z80_daisy_config pseudo_daisy_config[] = { { "kp69" }, { nullptr } };
//-------------------------------------------------
// kl5c80a16_device - constructor
//-------------------------------------------------
kl5c80a16_device::kl5c80a16_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock)
: kc82_device(mconfig, KL5C80A16, tag, owner, clock,
address_map_constructor(),
address_map_constructor(FUNC(kl5c80a16_device::internal_io), this))
, m_kp69(*this, "kp69")
, m_port_in_callback(*this)
, m_port_out_callback(*this)
, m_port_data{0, 0, 0, 0}
, m_port_direction{0x0f, 0, 0, 0}
, m_port_3state{0, 0, 0, 0}
{
}
//-------------------------------------------------
// internal_io - map for internal I/O registers
//-------------------------------------------------
void kl5c80a16_device::internal_io(address_map &map)
{
map(0x00, 0x07).mirror(0xff00).rw(FUNC(kl5c80a16_device::mmu_r), FUNC(kl5c80a16_device::mmu_w));
map(0x20, 0x27).mirror(0xff00).rw("timer", FUNC(kp63a_device::read), FUNC(kp63a_device::write));
map(0x34, 0x34).mirror(0xff00).rw(m_kp69, FUNC(kp69_device::isrl_r), FUNC(kp69_device::lerl_pgrl_w));
map(0x35, 0x35).mirror(0xff00).rw(m_kp69, FUNC(kp69_device::isrh_r), FUNC(kp69_device::lerh_pgrh_w));
map(0x36, 0x36).mirror(0xff00).rw(m_kp69, FUNC(kp69_device::imrl_r), FUNC(kp69_device::imrl_w));
map(0x37, 0x37).mirror(0xff00).rw(m_kp69, FUNC(kp69_device::imrh_r), FUNC(kp69_device::ivr_imrh_w));
map(0x38, 0x3f).mirror(0xff00).rw(FUNC(kl5c80a16_device::port_r), FUNC(kl5c80a16_device::port_w));
}
//-------------------------------------------------
// device_resolve_objects - resolve objects that
// may be needed for other devices to set
// initial conditions at start time
//-------------------------------------------------
void kl5c80a16_device::device_resolve_objects()
{
// Resolve parallel port callbacks
for (int i = 0; i < 4; i++)
m_port_in_callback[i].resolve_safe(m_port_3state[i]);
m_port_out_callback.resolve_all_safe();
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void kl5c80a16_device::device_start()
{
kc82_device::device_start();
m_kp69->add_to_state(*this, KP69_IRR);
// Register save state
save_item(NAME(m_port_data));
save_item(NAME(m_port_direction));
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void kl5c80a16_device::device_reset()
{
kc82_device::device_reset();
// Reset parallel port registers (Port 0 direction is fixed to upper 4 bits input & lower 4 bits output)
std::fill(std::begin(m_port_data), std::end(m_port_data), 0x00);
std::fill(std::begin(m_port_direction) + 1, std::end(m_port_direction), 0x00);
// Reset parallel port outputs
for (int i = 1; i < 4; i++)
m_port_out_callback[i](0, m_port_3state[i] & ~m_port_direction[i], m_port_direction[i]);
}
//-------------------------------------------------
// device_add_mconfig - add device-specific
// machine configuration
//-------------------------------------------------
void kl5c80a16_device::device_add_mconfig(machine_config &config)
{
KP69(config, m_kp69);
m_kp69->int_callback().set_inputline(*this, INPUT_LINE_IRQ0);
kp63a_device &timer(KP63A(config, "timer", DERIVED_CLOCK(1, 2)));
timer.outs_callback<0>().set(m_kp69, FUNC(kp69_device::ir_w<12>));
timer.outs_callback<1>().set(m_kp69, FUNC(kp69_device::ir_w<13>));
//timer.outs_callback<2>().set(m_kp69, FUNC(kp69_device::ir_w<0>)); // TODO: multiplexed with P20 input by SCR1 bit 4
//timer.outs_callback<3>().set(m_kp69, FUNC(kp69_device::ir_w<1>)); // TODO: multiplexed with P21 input by SCR1 bit 5 (may also be NMI)
}
//-------------------------------------------------
// device_config_complete - perform any
// operations now that the configuration is
// complete
//-------------------------------------------------
void kl5c80a16_device::device_config_complete()
{
set_daisy_config(pseudo_daisy_config);
}
//**************************************************************************
// KP67 PARALLEL PORT
//**************************************************************************
//-------------------------------------------------
// port_r - read from parallel port data or
// direction register
//-------------------------------------------------
u8 kl5c80a16_device::port_r(offs_t offset)
{
if (BIT(offset, 0))
return m_port_direction[offset >> 1];
else
{
u8 data = m_port_data[offset >> 1];
const u8 dir = m_port_direction[offset >> 1];
if (dir != 0xff)
data = (data & dir) | (m_port_in_callback[offset >> 1](0, u8(~dir)) & ~dir);
return data;
}
}
//-------------------------------------------------
// port_w - write to parallel port data or
// direction register or bit control
//-------------------------------------------------
void kl5c80a16_device::port_w(offs_t offset, u8 data)
{
unsigned p = offset >> 1;
u8 dir = m_port_direction[p];
if (offset == 1)
{
// Bit set/reset command
const unsigned b = BIT(data, 1, 3);
p = BIT(data, 4, 2);
if (BIT(m_port_data[p], b) == BIT(data, 0))
return;
data = (m_port_data[p] ^= 1 << b);
dir = m_port_direction[p];
if (!BIT(dir, b))
return;
}
else if (BIT(offset, 0))
{
if (dir == data)
return;
m_port_direction[p] = dir = data;
data = m_port_data[p];
}
else
{
u8 old_data = std::exchange(m_port_data[p], data);
if (((old_data ^ data) & dir) == 0)
return;
}
// Update port output
m_port_out_callback[offset >> 1](0, (data & dir) | (m_port_3state[offset >> 1] & ~dir), dir);
}
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