charset=UTF-8 Last-Modified: Thu, 01 May 2025 15:59:13 GMT Expires: Sun, 29 Apr 2035 15:59:13 GMT Doc: Minor fix (nw) (#4547) - mame - MAME - Multiple Arcade Machine Emulator
summaryrefslogtreecommitdiffstatshomepage
diff options
context:
space:
mode:
author algestam <henrik@algestam.se>2019-01-22 19:09:26 +0100
committer Ivan Vangelista <mesgnet@yahoo.it>2019-01-22 19:09:26 +0100
commit2619be3e182c8661f9111611290a668a2e679f1a (patch)
treed46f2a39b992e32240f23a060e9007f964e18caa
parent451f7e424e7c4fff455524f446ce069c0cde3a1b (diff)
Doc: Minor fix (nw) (#4547)
-rw-r--r--docs/source/initialsetup/compilingmame.rst4
1 files changed, 2 insertions, 2 deletions
diff --git a/docs/source/initialsetup/compilingmame.rst b/docs/source/initialsetup/compilingmame.rst
index 8c21a550b16..44af60a91df 100644
--- a/docs/source/initialsetup/compilingmame.rst
+++ b/docs/source/initialsetup/compilingmame.rst
@@ -319,10 +319,10 @@ ARCHOPTS_CXX
source files.
ARCHOPTS_OBJC
Additional command-line options to pass to the compiler when compiling
- Objecive-C source files.
+ Objective-C source files.
ARCHOPTS_OBJCXX
Additional command-line options to pass to the compiler when compiling
- Objecive-C++ source files.
+ Objective-C++ source files.
Library/framework locations
~~~~~~~~~~~~~~~~~~~~~~~~~~~
132'>132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482
// license:BSD-3-Clause
// copyright-holders:Aaron Giles,smf
/***************************************************************************

    timekpr.h

    Various ST Microelectronics timekeeper SRAM implementations:
        - M48T02
        - M48T35
        - M48T37
        - M48T58
        - MK48T08
        - MK48T12

***************************************************************************/

#include "emu.h"
#include "machine/timekpr.h"
#include "machine/timehelp.h"

#define LOG_GENERAL (1U << 0)
#define LOG_TICKS   (1U << 1)

#define VERBOSE (0)
#include "logmacro.h"

// device type definition
DEFINE_DEVICE_TYPE(M48T02,  m48t02_device,  "m48t02",  "M48T02 Timekeeper")
DEFINE_DEVICE_TYPE(M48T35,  m48t35_device,  "m48t35",  "M48T35 Timekeeper")
DEFINE_DEVICE_TYPE(M48T37,  m48t37_device,  "m48t37",  "M48T37 Timekeeper")
DEFINE_DEVICE_TYPE(M48T58,  m48t58_device,  "m48t58",  "M48T58 Timekeeper")
DEFINE_DEVICE_TYPE(MK48T08, mk48t08_device, "mk48t08", "MK48T08 Timekeeper")
DEFINE_DEVICE_TYPE(MK48T12, mk48t12_device, "mk48t12", "MK48T12 Timekeeper")


/***************************************************************************
    MACROS
***************************************************************************/

#define MASK_SECONDS (0x7f)
#define MASK_MINUTES (0x7f)
#define MASK_HOURS (0x3f)
#define MASK_DAY (0x07)
#define MASK_DATE (0x3f)
#define MASK_MONTH (0x1f)
#define MASK_YEAR (0xff)
#define MASK_CENTURY (0xff)

#define CONTROL_W (0x80)
#define CONTROL_R (0x40)
#define CONTROL_S (0x20) /* not emulated */
#define CONTROL_CALIBRATION (0x1f) /* not emulated */

#define SECONDS_ST (0x80)

#define DAY_FT (0x40) /* M48T37 - not emulated */
#define DAY_CEB (0x20) /* M48T35/M48T58 */
#define DAY_CB (0x10) /* M48T35/M48T58 */

#define DATE_BLE (0x80) /* M48T58: not emulated */
#define DATE_BL (0x40) /* M48T58: not emulated */

#define FLAGS_BL (0x10) /* MK48T08/M48T37: not emulated */
#define FLAGS_AF (0x40) /* M48T37: not emulated */
#define FLAGS_WDF (0x80) /* M48T37 */


/***************************************************************************
    INLINE FUNCTIONS
***************************************************************************/

inline void counter_to_ram(u8 *data, s32 offset, u8 counter)
{
	if (offset >= 0)
		data[offset] = counter;
}

inline int counter_from_ram(u8 const *data, s32 offset, u8 unmap = 0)
{
	return (offset >= 0) ? data[offset] : unmap;
}

//**************************************************************************
//  LIVE DEVICE
//**************************************************************************

//-------------------------------------------------
//  timekeeper_device_config - constructor
//-------------------------------------------------

timekeeper_device::timekeeper_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, const XTAL &clock, u32 size)
	: device_t(mconfig, type, tag, owner, clock)
	, device_nvram_interface(mconfig, *this)
	, m_reset_cb(*this)
	, m_irq_cb(*this)
	, m_default_data(*this, DEVICE_SELF)
	, m_size(size)
{
}

m48t02_device::m48t02_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock)
	: timekeeper_device(mconfig, M48T02, tag, owner, clock, 0x800)
{
	m_offset_watchdog = -1;
	m_offset_control = 0x7f8;
	m_offset_seconds = 0x7f9;
	m_offset_minutes = 0x7fa;
	m_offset_hours = 0x7fb;
	m_offset_day = 0x7fc;
	m_offset_date = 0x7fd;
	m_offset_month = 0x7fe;
	m_offset_year = 0x7ff;
	m_offset_century = -1;
	m_offset_flags = -1;
}

m48t35_device::m48t35_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock)
	: timekeeper_device(mconfig, M48T35, tag, owner, clock, 0x8000)
{
	m_offset_watchdog = -1;
	m_offset_control = 0x7ff8;
	m_offset_seconds = 0x7ff9;
	m_offset_minutes = 0x7ffa;
	m_offset_hours = 0x7ffb;
	m_offset_day = 0x7ffc;
	m_offset_date = 0x7ffd;
	m_offset_month = 0x7ffe;
	m_offset_year = 0x7fff;
	m_offset_century = -1;
	m_offset_flags = -1;
}

m48t37_device::m48t37_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock)
	: timekeeper_device(mconfig, M48T37, tag, owner, clock, 0x8000)
{
	m_offset_watchdog = 0x7ff7;
	m_offset_control = 0x7ff8;
	m_offset_seconds = 0x7ff9;
	m_offset_minutes = 0x7ffa;
	m_offset_hours = 0x7ffb;
	m_offset_day = 0x7ffc;
	m_offset_date = 0x7ffd;
	m_offset_month = 0x7ffe;
	m_offset_year = 0x7fff;
	m_offset_century = 0x7ff1;
	m_offset_flags = 0x7ff0;
}

m48t58_device::m48t58_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock)
	: timekeeper_device(mconfig, M48T58, tag, owner, clock, 0x2000)
{
	m_offset_watchdog = -1;
	m_offset_control = 0x1ff8;
	m_offset_seconds = 0x1ff9;
	m_offset_minutes = 0x1ffa;
	m_offset_hours = 0x1ffb;
	m_offset_day = 0x1ffc;
	m_offset_date = 0x1ffd;
	m_offset_month = 0x1ffe;
	m_offset_year = 0x1fff;
	m_offset_century = -1;
	m_offset_flags = -1;
}

mk48t08_device::mk48t08_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock)
	: timekeeper_device(mconfig, MK48T08, tag, owner, clock, 0x2000)
{
	m_offset_watchdog = -1;
	m_offset_control = 0x1ff8;
	m_offset_seconds = 0x1ff9;
	m_offset_minutes = 0x1ffa;
	m_offset_hours = 0x1ffb;
	m_offset_day = 0x1ffc;
	m_offset_date = 0x1ffd;
	m_offset_month = 0x1ffe;
	m_offset_year = 0x1fff;
	m_offset_century = 0x1ff1;
	m_offset_flags = 0x1ff0;
}

mk48t12_device::mk48t12_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock)
	: timekeeper_device(mconfig, MK48T12, tag, owner, clock, 0x800)
{
	m_offset_watchdog = -1;
	m_offset_control = 0x7f8;
	m_offset_seconds = 0x7f9;
	m_offset_minutes = 0x7fa;
	m_offset_hours = 0x7fb;
	m_offset_day = 0x7fc;
	m_offset_date = 0x7fd;
	m_offset_month = 0x7fe;
	m_offset_year = 0x7ff;
	m_offset_century = -1;
}


//-------------------------------------------------
//  device_start - device-specific startup
//-------------------------------------------------

void timekeeper_device::device_start()
{
	system_time systime;

	machine().base_datetime(systime);

	m_control = 0;
	m_seconds = time_helper::make_bcd(systime.local_time.second);
	m_minutes = time_helper::make_bcd(systime.local_time.minute);
	m_hours = time_helper::make_bcd(systime.local_time.hour);
	m_day = time_helper::make_bcd(systime.local_time.weekday + 1);
	m_date = time_helper::make_bcd(systime.local_time.mday);
	m_month = time_helper::make_bcd(systime.local_time.month + 1);
	m_year = time_helper::make_bcd(systime.local_time.year % 100);
	m_century = time_helper::make_bcd(systime.local_time.year / 100);
	m_data.resize(m_size);

	save_item(NAME(m_control));
	save_item(NAME(m_seconds));
	save_item(NAME(m_minutes));
	save_item(NAME(m_hours));
	save_item(NAME(m_day));
	save_item(NAME(m_date));
	save_item(NAME(m_month));
	save_item(NAME(m_year));
	save_item(NAME(m_century));
	save_item(NAME(m_data));
	save_item(NAME(m_watchdog_delay));

	emu_timer *timer = timer_alloc(FUNC(timekeeper_device::timer_tick), this);
	timer->adjust(attotime::from_seconds(1), 0, attotime::from_seconds(1));

	m_watchdog_timer = timer_alloc(FUNC(timekeeper_device::watchdog_callback), this);
	m_watchdog_timer->adjust(attotime::never);
	m_reset_cb.resolve_safe();
	m_irq_cb.resolve_safe();
}

//-------------------------------------------------
//  device_reset - device-specific reset
//-------------------------------------------------

void timekeeper_device::device_reset()
{
}

void timekeeper_device::counters_to_ram()
{
	counter_to_ram(&m_data[0], m_offset_control, m_control);
	counter_to_ram(&m_data[0], m_offset_seconds, m_seconds);
	counter_to_ram(&m_data[0], m_offset_minutes, m_minutes);
	counter_to_ram(&m_data[0], m_offset_hours, m_hours);
	counter_to_ram(&m_data[0], m_offset_day, m_day);
	counter_to_ram(&m_data[0], m_offset_date, m_date);
	counter_to_ram(&m_data[0], m_offset_month, m_month);
	counter_to_ram(&m_data[0], m_offset_year, m_year);
	counter_to_ram(&m_data[0], m_offset_century, m_century);
}

void timekeeper_device::counters_from_ram()
{
	m_control = counter_from_ram(&m_data[0], m_offset_control);
	m_seconds = counter_from_ram(&m_data[0], m_offset_seconds);
	m_minutes = counter_from_ram(&m_data[0], m_offset_minutes);
	m_hours = counter_from_ram(&m_data[0], m_offset_hours);
	m_day = counter_from_ram(&m_data[0], m_offset_day);
	m_date = counter_from_ram(&m_data[0], m_offset_date);
	m_month = counter_from_ram(&m_data[0], m_offset_month);
	m_year = counter_from_ram(&m_data[0], m_offset_year);
	m_century = counter_from_ram(&m_data[0], m_offset_century);
}

TIMER_CALLBACK_MEMBER(timekeeper_device::timer_tick)
{
	LOGMASKED(LOG_TICKS, "Tick\n");
	if ((m_seconds & SECONDS_ST) != 0 ||
		(m_control & CONTROL_W) != 0)
	{
		logerror("No Tick\n");
		return;
	}

	int carry = time_helper::inc_bcd(&m_seconds, MASK_SECONDS, 0x00, 0x59);
	if (carry)
	{
		carry = time_helper::inc_bcd(&m_minutes, MASK_MINUTES, 0x00, 0x59);
	}
	if (carry)
	{
		carry = time_helper::inc_bcd(&m_hours, MASK_HOURS, 0x00, 0x23);
	}

	if (carry)
	{
		u8 maxdays;
		static const u8 daysinmonth[] = { 0x31, 0x28, 0x31, 0x30, 0x31, 0x30, 0x31, 0x31, 0x30, 0x31, 0x30, 0x31 };

		time_helper::inc_bcd(&m_day, MASK_DAY, 0x01, 0x07);

		u8 month = time_helper::from_bcd(m_month);
		u8 year = time_helper::from_bcd(m_year);

		if (month == 2 && (year % 4) == 0)
		{
			maxdays = 0x29;
		}
		else if (month >= 1 && month <= 12)
		{
			maxdays = daysinmonth[month - 1];
		}
		else
		{
			maxdays = 0x31;
		}

		carry = time_helper::inc_bcd(&m_date, MASK_DATE, 0x01, maxdays);
	}
	if (carry)
	{
		carry = time_helper::inc_bcd(&m_month, MASK_MONTH, 0x01, 0x12);
	}
	if (carry)
	{
		carry = time_helper::inc_bcd(&m_year, MASK_YEAR, 0x00, 0x99);
	}
	if (carry)
	{
		carry = time_helper::inc_bcd(&m_century, MASK_CENTURY, 0x00, 0x99);

		if (type() == M48T35 ||
			type() == M48T58)
		{
			if ((m_day & DAY_CEB) != 0)
			{
				m_day ^= DAY_CB;
			}
		}
	}

	if ((m_control & CONTROL_R) == 0)
	{
		counters_to_ram();
	}
}

TIMER_CALLBACK_MEMBER(timekeeper_device::watchdog_callback)
{
	// Set Flag
	m_data[m_offset_flags] |= FLAGS_WDF;
	// WDS (bit 7) selects callback
	if (m_data[m_offset_watchdog] & 0x80)
	{
		// Clear watchdog register
		m_data[m_offset_watchdog] = 0;
		m_reset_cb(ASSERT_LINE);
	}
	else
		m_irq_cb(ASSERT_LINE);

	logerror("watchdog_callback: WD Control: %02x WD Flags: %02x\n", m_data[m_offset_watchdog], m_data[m_offset_flags]);
}

void timekeeper_device::watchdog_write(u8 data)
{
	if ((m_data[m_offset_watchdog] & 0x7f) != 0)
		m_watchdog_timer->adjust(m_watchdog_delay);
}

void timekeeper_device::write(offs_t offset, u8 data)
{
	LOGMASKED(LOG_GENERAL, "timekeeper_device::write: %04x = %02x\n", offset, data);
	if (offset == m_offset_control)
	{
		if ((m_control & CONTROL_W) != 0 &&
			(data & CONTROL_W) == 0)
		{
			counters_from_ram();
		}

		if ((m_control & CONTROL_R) != 0 &&
			(data & CONTROL_W) == 0)
		{
			counters_to_ram();
		}

		m_control = data;
	}
	else if (offset == m_offset_day)
	{
		if (type() == M48T35 ||
			type() == M48T58)
		{
			m_day = (m_day & ~DAY_CEB) | (data & DAY_CEB);
		}
	}
	else if (offset == m_offset_watchdog && type() == M48T37)
	{
		if ((data & 0x7f) == 0)
		{
			m_watchdog_timer->adjust(attotime::never);
		}
		else
		{
			// Calculate the time unit
			m_watchdog_delay = attotime::from_usec(62500 << (2 * (data & 0x3)));
			// Adjust by multiplier
			m_watchdog_delay *= (data >> 2) & 0x1f;
			m_watchdog_timer->adjust(m_watchdog_delay);
			//logerror("write: setting watchdog to %s WatchdogReg = 0x%02x\n", m_watchdog_delay.as_string(), data);
		}
	}

	m_data[offset] = data;
}

u8 timekeeper_device::read(offs_t offset)
{
	u8 result = m_data[offset];
	if (offset == m_offset_date && type() == M48T58)
	{
		result &= ~DATE_BL;
	}
	else if (offset == m_offset_flags && type() == M48T37)
	{
		// Clear the watchdog flag
		m_data[m_offset_flags] &= ~FLAGS_WDF;
		// Clear callbacks
		m_reset_cb(CLEAR_LINE);
		m_irq_cb(CLEAR_LINE);
	}
	LOGMASKED(LOG_GENERAL, "timekeeper_device::read: %04x (%02x)\n", offset, result);
	return result;
}

//-------------------------------------------------
//  nvram_default - called to initialize NVRAM to
//  its default state
//-------------------------------------------------

void timekeeper_device::nvram_default()
{
	if (m_default_data.found())
	{
		memcpy(&m_data[0], m_default_data, m_size);
	}
	else
	{
		memset(&m_data[0], 0xff, m_data.size());
	}

	if (m_offset_flags >= 0)
		m_data[m_offset_flags] = 0;
	counters_to_ram();
}


//-------------------------------------------------
//  nvram_read - called to read NVRAM from the
//  .nv file
//-------------------------------------------------

bool timekeeper_device::nvram_read(util::read_stream &file)
{
	size_t actual;
	if (file.read(&m_data[0], m_size, actual) || actual != m_size)
		return false;

	counters_to_ram();
	return true;
}


//-------------------------------------------------
//  nvram_write - called to write NVRAM to the
//  .nv file
//-------------------------------------------------

bool timekeeper_device::nvram_write(util::write_stream &file)
{
	size_t actual;
	return !file.write(&m_data[0], m_size, actual) && actual == m_size;
}