cia.cpp

/*
* UAE - The Un*x Amiga Emulator
*
* CIA chip support
*
* Copyright 1995 Bernd Schmidt, Alessandro Bissacco
* Copyright 1996, 1997 Stefan Reinauer, Christian Schmitt
*/


#include "sysconfig.h"
#include "sysdeps.h"
#include <assert.h>

#include "options.h"
#include "events.h"
#include "memory.h"
#include "custom.h"
#include "newcpu.h"
#include "cia.h"
#include "serial.h"
#include "disk.h"
#include "xwin.h"
#include "keybuf.h"
#include "gui.h"
#include "savestate.h"
#include "inputdevice.h"
#include "zfile.h"
#include "ar.h"
#include "parallel.h"
#include "akiko.h"
#include "cdtv.h"
#include "debug.h"
#include "arcadia.h"
#include "audio.h"
#include "keyboard.h"
#include "uae.h"
#include "amax.h"
#include "sampler.h"
#include "dongle.h"
#include "inputrecord.h"
#include "autoconf.h"

#define CIAA_DEBUG_R 0
#define CIAA_DEBUG_W 0
#define CIAB_DEBUG_R 0
#define CIAB_DEBUG_W 0
#define DONGLE_DEBUG 0
#define KB_DEBUG 0
#define CLOCK_DEBUG 0

#define TOD_HACK

/* e-clock is 10 CPU cycles, 4 cycles high, 6 low
* data transfer happens during 4 high cycles
*/
#define ECLOCK_DATA_CYCLE 4
#define ECLOCK_WAIT_CYCLE 6

#define DIV10 ((ECLOCK_DATA_CYCLE + ECLOCK_WAIT_CYCLE) * CYCLE_UNIT / 2) /* Yes, a bad identifier. */
#define CIASTARTCYCLESHI 3
#define CIASTARTCYCLESCRA 2

static unsigned int ciaaicr, ciaaimask, ciabicr, ciabimask;
static unsigned int ciaacra, ciaacrb, ciabcra, ciabcrb;
static unsigned int ciaastarta, ciaastartb, ciabstarta, ciabstartb;
static unsigned int ciaaicr_reg, ciabicr_reg;

/* Values of the CIA timers.  */
static unsigned long ciaata, ciaatb, ciabta, ciabtb;
/* Computed by compute_passed_time.  */
static unsigned long ciaata_passed, ciaatb_passed, ciabta_passed, ciabtb_passed;

static unsigned long ciaatod, ciabtod, ciaatol, ciabtol, ciaaalarm, ciabalarm;
static int ciaatlatch, ciabtlatch;
static bool oldled, oldovl, oldcd32mute;
static bool led;
static int led_old_brightness;
static unsigned long led_cycles_on, led_cycles_off, led_cycle;

unsigned int ciabpra;

static unsigned long ciaala, ciaalb, ciabla, ciablb;
static int ciaatodon, ciabtodon;
static unsigned int ciaapra, ciaaprb, ciaadra, ciaadrb, ciaasdr, ciaasdr_cnt;
static unsigned int ciabprb, ciabdra, ciabdrb, ciabsdr, ciabsdr_cnt;
static int div10;
static int kbstate, kblostsynccnt;
static uae_u8 kbcode;

static uae_u8 serbits;
static int warned = 10;
static int rtc_delayed_write;


static void setclr (unsigned int *p, unsigned int val)
{
	if (val & 0x80) {
		*p |= val & 0x7F;
	} else {
		*p &= ~val;
	}
}

static void ICRA(uae_u32 data)
{
	if (ciaaimask & ciaaicr) {
		ciaaicr |= 0x80;
		INTREQ_0 (0x8000 | data);
	}
	ciaaicr_reg |= ciaaicr;
}
static void ICRB(uae_u32 data)
{
	if (ciabimask & ciabicr) {
		ciabicr |= 0x80;
		INTREQ_0 (0x8000 | data);
	}
	ciabicr_reg |= ciabicr;
}

static void RethinkICRA (void)
{
	if (ciaaicr) {
		if (currprefs.cpu_cycle_exact)
			event2_newevent_xx (-1, 2 * CYCLE_UNIT + CYCLE_UNIT / 2, 0x0008, ICRA);
		else
			ICRA (0x0008);
	}
}

static void RethinkICRB (void)
{
	if (ciabicr) {
		if (currprefs.cpu_cycle_exact)
			event2_newevent_xx (-1, 2 * CYCLE_UNIT + CYCLE_UNIT / 2, 0x2000, ICRB);
		else
			ICRB (0x2000);
	}
}

void rethink_cias (void)
{
	RethinkICRA ();
	RethinkICRB ();
}

/* Figure out how many CIA timer cycles have passed for each timer since the
last call of CIA_calctimers.  */

static void compute_passed_time (void)
{
	unsigned long int ccount = (get_cycles () - eventtab[ev_cia].oldcycles + div10);
	unsigned long int ciaclocks = ccount / DIV10;

	ciaata_passed = ciaatb_passed = ciabta_passed = ciabtb_passed = 0;

	/* CIA A timers */
	if ((ciaacra & 0x21) == 0x01) {
		unsigned long int cc = ciaclocks;
		if (cc > ciaastarta)
			cc -= ciaastarta;
		else
			cc = 0;
		assert ((ciaata + 1) >= cc);
		ciaata_passed = cc;
	}
	if ((ciaacrb & 0x61) == 0x01) {
		unsigned long int cc = ciaclocks;
		if (cc > ciaastartb)
			cc -= ciaastartb;
		else
			cc = 0;
		assert ((ciaatb + 1) >= cc);
		ciaatb_passed = cc;
	}

	/* CIA B timers */
	if ((ciabcra & 0x21) == 0x01) {
		unsigned long int cc = ciaclocks;
		if (cc > ciabstarta)
			cc -= ciabstarta;
		else
			cc = 0;
		assert ((ciabta + 1) >= cc);
		ciabta_passed = cc;
	}
	if ((ciabcrb & 0x61) == 0x01) {
		unsigned long int cc = ciaclocks;
		if (cc > ciabstartb)
			cc -= ciabstartb;
		else
			cc = 0;
		assert ((ciabtb + 1) >= cc);
		ciabtb_passed = cc;
	}
}

/* Called to advance all CIA timers to the current time.  This expects that
one of the timer values will be modified, and CIA_calctimers will be called
in the same cycle.  */

static int CIA_update_check (void)
{
	unsigned long int ccount = (get_cycles () - eventtab[ev_cia].oldcycles + div10);
	unsigned long int ciaclocks = ccount / DIV10;

	int aovfla = 0, aovflb = 0, asp = 0, bovfla = 0, bovflb = 0, bsp = 0;
	int icr = 0;

	div10 = ccount % DIV10;

	/* CIA A timers */
	if ((ciaacra & 0x21) == 0x01) {
		bool check = true;
		unsigned long int cc = ciaclocks;
		if (ciaastarta > 0) {
			if (cc > ciaastarta) {
				cc -= ciaastarta;
				ciaastarta = 0;
			} else {
				ciaastarta -= cc;
				check = false;
			}
		}
		if (check) {
			assert ((ciaata + 1) >= cc);
			if ((ciaata + 1) == cc) {
				if ((ciaacra & 0x48) == 0x40 && ciaasdr_cnt > 0 && --ciaasdr_cnt == 0)
					asp = 1;
				aovfla = 1;
				if ((ciaacrb & 0x61) == 0x41 || (ciaacrb & 0x61) == 0x61) {
					if (ciaatb-- == 0)
						aovflb = 1;
				}
			}
			ciaata -= cc;
		}
	}
	if ((ciaacrb & 0x61) == 0x01) {
		bool check = true;
		unsigned long int cc = ciaclocks;
		if (ciaastartb > 0) {
			if (cc > ciaastartb) {
				cc -= ciaastartb;
				ciaastartb = 0;
			} else {
				ciaastartb -= cc;
				check = false;
			}
		}
		if (check) {
			assert ((ciaatb + 1) >= cc);
			if ((ciaatb + 1) == cc)
				aovflb = 1;
			ciaatb -= cc;
		}
	}

	/* CIA B timers */
	if ((ciabcra & 0x21) == 0x01) {
		bool check = true;
		unsigned long int cc = ciaclocks;
		if (ciabstarta > 0) {
			if (cc > ciabstarta) {
				cc -= ciabstarta;
				ciabstarta = 0;
			} else {
				ciabstarta -= cc;
				check = false;
			}
		}
		if (check) {
			assert ((ciabta + 1) >= cc);
			if ((ciabta + 1) == cc) {
				if ((ciabcra & 0x48) == 0x40 && ciabsdr_cnt > 0 && --ciabsdr_cnt == 0)
					bsp = 1;
				bovfla = 1;
				if ((ciabcrb & 0x61) == 0x41 || (ciabcrb & 0x61) == 0x61) {
					if (ciabtb-- == 0)
						bovflb = 1;
				}
			}
			ciabta -= cc;
		}
	}
	if ((ciabcrb & 0x61) == 0x01) {
		bool check = true;
		unsigned long int cc = ciaclocks;
		if (ciabstartb > 0) {
			if (cc > ciabstartb) {
				cc -= ciabstartb;
				ciabstartb = 0;
			} else {
				ciabstartb -= cc;
				check = false;
			}
		}
		if (check) {
			assert ((ciabtb + 1) >= cc);
			if ((ciabtb + 1) == cc)
				bovflb = 1;
			ciabtb -= cc;
		}
	}

	if (aovfla) {
		ciaaicr |= 1; icr = 1;
		ciaata = ciaala;
		if (ciaacra & 0x8) {
			ciaacra &= ~1;
		}
	}
	if (aovflb) {
		ciaaicr |= 2; icr = 1;
		ciaatb = ciaalb;
		if (ciaacrb & 0x8) {
			ciaacrb &= ~1;
		}
	}
	if (asp) {
		ciaaicr |= 8; icr = 1;
	}
	if (bovfla) {
		ciabicr |= 1; icr |= 2;
		ciabta = ciabla;
		if (ciabcra & 0x8) {
			ciabcra &= ~1;
		}
	}
	if (bovflb) {
		ciabicr |= 2; icr |= 2;
		ciabtb = ciablb;
		if (ciabcrb & 0x8) {
			ciabcrb &= ~1;
		}
	}
	if (bsp) {
		ciabicr |= 8; icr |= 2;
	}
	return icr;
}
static void CIA_update (void)
{
	int icr = CIA_update_check ();
	if (icr & 1)
		RethinkICRA ();
	if (icr & 2)
		RethinkICRB ();
}


/* Call this only after CIA_update has been called in the same cycle.  */

static void CIA_calctimers (void)
{
	long int ciaatimea = -1, ciaatimeb = -1, ciabtimea = -1, ciabtimeb = -1;
	int div10diff = DIV10 - div10;

	eventtab[ev_cia].oldcycles = get_cycles ();

	if ((ciaacra & 0x21) == 0x01) {
		ciaatimea = div10diff + DIV10 * (ciaata + ciaastarta);
	}
#if 0
	if ((ciaacrb & 0x61) == 0x41) {
		/* Timer B will not get any pulses if Timer A is off. */
		if (ciaatimea >= 0) {
			/* If Timer A is in one-shot mode, and Timer B needs more than
			* one pulse, it will not underflow. */
			if (ciaatb == 0 || (ciaacra & 0x8) == 0) {
				/* Otherwise, we can determine the time of the underflow. */
				/* This may overflow, however.  So just ignore this timer and
				use the fact that we'll call CIA_handler for the A timer.  */
				/* ciaatimeb = ciaatimea + ciaala * DIV10 * ciaatb; */
			}
		}
	}
#endif
	if ((ciaacrb & 0x61) == 0x01) {
		ciaatimeb = div10diff + DIV10 * (ciaatb + ciaastartb);
	}

	if ((ciabcra & 0x21) == 0x01) {
		ciabtimea = div10diff + DIV10 * (ciabta + ciabstarta);
	}
#if 0
	if ((ciabcrb & 0x61) == 0x41) {
		/* Timer B will not get any pulses if Timer A is off. */
		if (ciabtimea >= 0) {
			/* If Timer A is in one-shot mode, and Timer B needs more than
			* one pulse, it will not underflow. */
			if (ciabtb == 0 || (ciabcra & 0x8) == 0) {
				/* Otherwise, we can determine the time of the underflow. */
				/* ciabtimeb = ciabtimea + ciabla * DIV10 * ciabtb; */
			}
		}
	}
#endif
	if ((ciabcrb & 0x61) == 0x01) {
		ciabtimeb = div10diff + DIV10 * (ciabtb + ciabstartb);
	}

	eventtab[ev_cia].active = (ciaatimea != -1 || ciaatimeb != -1
		|| ciabtimea != -1 || ciabtimeb != -1);
	if (eventtab[ev_cia].active) {
		unsigned long int ciatime = ~0L;
		if (ciaatimea != -1)
			ciatime = ciaatimea;
		if (ciaatimeb != -1 && ciaatimeb < ciatime)
			ciatime = ciaatimeb;
		if (ciabtimea != -1 && ciabtimea < ciatime)
			ciatime = ciabtimea;
		if (ciabtimeb != -1 && ciabtimeb < ciatime)
			ciatime = ciabtimeb;
		eventtab[ev_cia].evtime = ciatime + get_cycles ();
	}
	events_schedule();
}

void CIA_handler (void)
{
	CIA_update ();
	CIA_calctimers ();
}

void cia_diskindex (void)
{
	ciabicr |= 0x10;
	RethinkICRB ();
}
void cia_parallelack (void)
{
	ciaaicr |= 0x10;
	RethinkICRA ();
}

static int checkalarm (unsigned long tod, unsigned long alarm, int inc)
{
	if (tod == alarm)
		return 1;
	if (!inc)
		return 0;
	/* emulate buggy TODMED counter.
	* it counts: .. 29 2A 2B 2C 2D 2E 2F 20 30 31 32 ..
	* (2F->20->30 only takes couple of cycles but it will trigger alarm..
	*/
	if (tod & 0x000fff)
		return 0;
	if (((tod - 1) & 0xfff000) == alarm)
		return 1;
	return 0;
}

STATIC_INLINE void ciab_checkalarm (int inc)
{
	// hack: do not trigger alarm interrupt if KS code and both
	// tod and alarm == 0. This incorrectly triggers on non-cycle exact
	// modes. Real hardware value written to ciabtod by KS is always
	// at least 1 or larger due to bus cycle delays when reading
	// old value.
	if ((munge24 (m68k_getpc ()) & 0xFFF80000) == 0xF80000) {
		if (ciabtod == 0 && ciabalarm == 0)
			return;
	}
	if (checkalarm (ciabtod, ciabalarm, inc)) {
		ciabicr |= 4;
		RethinkICRB ();
	}
}

STATIC_INLINE void ciaa_checkalarm (int inc)
{
	if (checkalarm (ciaatod, ciaaalarm, inc)) {
		ciaaicr |= 4;
		RethinkICRA ();
	}
}

#ifdef TOD_HACK
static uae_u64 tod_hack_tv, tod_hack_tod, tod_hack_tod_last;
static int tod_hack_enabled;
#define TOD_HACK_TIME 312 * 50 * 10
static void tod_hack_reset (void)
{
	struct timeval tv;
	gettimeofday (&tv, NULL);
	tod_hack_tv = (uae_u64)tv.tv_sec * 1000000 + tv.tv_usec;
	tod_hack_tod = ciaatod;
	tod_hack_tod_last = tod_hack_tod;
}
#endif

static int heartbeat_cnt;
void cia_heartbeat (void)
{
	heartbeat_cnt = 10;
}

static void do_tod_hack (int dotod)
{
	struct timeval tv;
	static int oldrate;
	uae_u64 t;
	int rate;
	int docount = 0;

	if (tod_hack_enabled == 0)
		return;
	if (!heartbeat_cnt) {
		if (tod_hack_enabled > 0)
			tod_hack_enabled = -1;
		return;
	}
	if (tod_hack_enabled < 0) {
		tod_hack_enabled = TOD_HACK_TIME;
		return;
	}
	if (tod_hack_enabled > 1) {
		tod_hack_enabled--;
		if (tod_hack_enabled == 1) {
			//write_log (_T("TOD HACK enabled\n"));
			tod_hack_reset ();
		}
		return;
	}

	if (currprefs.cs_ciaatod == 0)
		rate = (int)(vblank_hz + 0.5);
	else if (currprefs.cs_ciaatod == 1)
		rate = 50;
	else
		rate = 60;
	if (rate <= 0)
		return;
	if (rate != oldrate || ciaatod != tod_hack_tod_last) {
		//if (ciaatod != 0)
		//	write_log (_T("TOD HACK reset %d,%d %d,%d\n"), rate, oldrate, ciaatod, tod_hack_tod_last);
		tod_hack_reset ();
		oldrate = rate;
		docount = 1;
	}
	if (!dotod && currprefs.cs_ciaatod == 0)
		return;
	gettimeofday (&tv, NULL);
	t = (uae_u64)tv.tv_sec * 1000000 + tv.tv_usec;
	if (t - tod_hack_tv >= 1000000 / rate) {
		tod_hack_tv += 1000000 / rate;
		docount = 1;
	}
	if (docount) {
		ciaatod++;
		ciaatod &= 0x00ffffff;
		tod_hack_tod_last = ciaatod;
		ciaa_checkalarm (0);
	}
}

static int resetwarning_phase, resetwarning_timer;

static void setcode (uae_u8 keycode)
{
	kbcode = ~((keycode << 1) | (keycode >> 7));
}

static void sendrw (void)
{
	setcode (AK_RESETWARNING);
	ciaasdr = kbcode;
	kblostsynccnt = 8 * maxvpos * 8; // 8 frames * 8 bits.
	ciaaicr |= 8;
	RethinkICRA ();
	write_log (_T("KB: sent reset warning code (phase=%d)\n"), resetwarning_phase);
}

int resetwarning_do (int canreset)
{
	if (resetwarning_phase) {
		/* just force reset if second reset happens during resetwarning */
		if (canreset) {
			resetwarning_phase = 0;
			resetwarning_timer = 0;
		}
		return 0;
	}
	resetwarning_phase = 1;
	resetwarning_timer = maxvpos_nom * 5;
	write_log (_T("KB: reset warning triggered\n"));
	sendrw ();
	return 1;
}

static void resetwarning_check (void)
{
	if (resetwarning_timer > 0) {
		resetwarning_timer--;
		if (resetwarning_timer <= 0) {
			write_log (_T("KB: reset warning forced reset. Phase=%d\n"), resetwarning_phase);
			resetwarning_phase = -1;
			kblostsynccnt = 0;
			send_internalevent (INTERNALEVENT_KBRESET);
			uae_reset (0, 1);
		}
	}
	if (resetwarning_phase == 1) {
		if (!kblostsynccnt) { /* first AK_RESETWARNING handshake received */
			write_log (_T("KB: reset warning second phase..\n"));
			resetwarning_phase = 2;
			resetwarning_timer = maxvpos_nom * 5;
			sendrw ();
		}
	} else if (resetwarning_phase == 2) {
		if (ciaacra & 0x40) { /* second AK_RESETWARNING handshake active */
			resetwarning_phase = 3;
			write_log (_T("KB: reset warning SP = output\n"));
			/* System won't reset until handshake signal becomes inactive or 10s has passed */
			resetwarning_timer = 10 * maxvpos_nom * vblank_hz;
		}
	} else if (resetwarning_phase == 3) {
		if (!(ciaacra & 0x40)) { /* second AK_RESETWARNING handshake disabled */
			write_log (_T("KB: reset warning end by software. reset.\n"));
			resetwarning_phase = -1;
			kblostsynccnt = 0;
			send_internalevent (INTERNALEVENT_KBRESET);
			uae_reset (0, 1);
		}
	}
}

void CIA_hsync_prehandler (void)
{
}

static void keyreq (void)
{
#if KB_DEBUG
	write_log (_T("code=%x\n"), kbcode);
#endif
	ciaasdr = kbcode;
	kblostsynccnt = 8 * maxvpos * 8; // 8 frames * 8 bits.
	ciaaicr |= 8;
	RethinkICRA ();
}

void CIA_hsync_posthandler (bool dotod)
{

	if (ciabtodon && dotod) {
		ciabtod++;
		ciabtod &= 0xFFFFFF;
		ciab_checkalarm (1);
	}

	if (currprefs.tod_hack && ciaatodon)
		do_tod_hack (dotod);

	if (resetwarning_phase) {
		resetwarning_check ();
		while (keys_available ())
			get_next_key ();
	} else if ((keys_available () || kbstate < 3) && !kblostsynccnt && (hsync_counter & 15) == 0) {
		switch (kbstate)
		{
			case 0:
				kbcode = 0; /* powerup resync */
				kbstate++;
				break;
			case 1:
				setcode (AK_INIT_POWERUP);
				kbstate++;
				break;
			case 2:
				setcode (AK_TERM_POWERUP);
				kbstate++;
				break;
			case 3:
				kbcode = ~get_next_key ();
				break;
		}
		keyreq ();
	}
}

static void calc_led (int old_led)
{
	unsigned long c = get_cycles ();
	unsigned long t = (c - led_cycle) / CYCLE_UNIT;
	if (old_led)
		led_cycles_on += t;
	else
		led_cycles_off += t;
	led_cycle = c;
}

static void led_vsync (void)
{
	int v;

	calc_led (led);
	if (led_cycles_on && !led_cycles_off)
		v = 255;
	else if (led_cycles_off && !led_cycles_on)
		v = 0;
	else if (led_cycles_off)
		v = led_cycles_on * 255 / (led_cycles_on + led_cycles_off);
	else
		v = 255;
	if (v < 0)
		v = 0;
	if (v > 255)
		v = 255;
	gui_data.powerled_brightness = v;
	led_cycles_on = 0;
	led_cycles_off = 0;
	if (led_old_brightness != gui_data.powerled_brightness) {
		gui_data.powerled = gui_data.powerled_brightness > 127;
		gui_led (LED_POWER, gui_data.powerled);
		led_filter_audio ();
	}
	led_old_brightness = gui_data.powerled_brightness;
	led_cycle = get_cycles ();
}

static void write_battclock (void);
void CIA_vsync_prehandler (void)
{
	if (rtc_delayed_write < 0) {
		rtc_delayed_write = 50;
	} else if (rtc_delayed_write > 0) {
		rtc_delayed_write--;
		if (rtc_delayed_write == 0)
			write_battclock ();
	}
	led_vsync ();
	CIA_handler ();
	if (kblostsynccnt > 0) {
		kblostsynccnt -= maxvpos;
		if (kblostsynccnt <= 0) {
			kblostsynccnt = 0;
			keyreq ();
#if KB_DEBUG
			write_log (_T("lostsync\n"));
#endif
		}
	}
}

void CIA_vsync_posthandler (bool dotod)
{
	if (heartbeat_cnt > 0)
		heartbeat_cnt--;
#ifdef TOD_HACK
	if (currprefs.tod_hack && tod_hack_enabled == 1)
		return;
#endif
	if (ciaatodon && dotod) {
		ciaatod++;
		ciaatod &= 0xFFFFFF;
		ciaa_checkalarm (1);
	}
#if 0
	if (vpos == 0) {
		write_log (_T("%d\n"), vsync_counter);
		dumpcia ();
	}
#endif
}

static void bfe001_change (void)
{
	uae_u8 v = ciaapra;
	bool led2;

	v |= ~ciaadra; /* output is high when pin's direction is input */
	led2 = (v & 2) ? 0 : 1;
	if (led2 != led) {
		calc_led (led);
		led = led2;
		led_old_brightness = -1;
	}
	if (currprefs.cs_ciaoverlay && (v & 1) != oldovl) {
		oldovl = v & 1;
		if (!oldovl) {
			map_overlay (1);
		} else {
			//activate_debugger ();
			map_overlay (0);
		}
	}
	if (currprefs.cs_cd32cd && (v & 1) != oldcd32mute) {
		oldcd32mute = v & 1;
		akiko_mute (oldcd32mute ? 0 : 1);
	}
}

static uae_u8 ReadCIAA (unsigned int addr)
{
	unsigned int tmp;
	int reg = addr & 15;

	compute_passed_time ();

#if CIAA_DEBUG_R > 0
	write_log (_T("R_CIAA: bfe%x01 %08X\n"), reg, M68K_GETPC);
#endif

	switch (reg) {
	case 0:
#ifdef ACTION_REPLAY
		action_replay_ciaread ();
#endif
		tmp = DISK_status() & 0x3c;
		tmp |= handle_joystick_buttons (ciaapra, ciaadra);
		tmp |= (ciaapra | (ciaadra ^ 3)) & 0x03;
		tmp = dongle_cia_read (0, reg, tmp);
#if DONGLE_DEBUG > 0
		if (notinrom())
			write_log (_T("BFE001 R %02X %s\n"), tmp, debuginfo(0));
#endif

		if (inputrecord_debug & 2) {
			if (input_record > 0)
				inprec_recorddebug_cia (tmp, div10, m68k_getpc ());
			else if (input_play > 0)
				inprec_playdebug_cia (tmp, div10, m68k_getpc ());
		}

		return tmp;
	case 1:
#ifdef PARALLEL_PORT
		if (isprinter () > 0) {
			tmp = ciaaprb;
		} else if (isprinter () < 0) {
			uae_u8 v;
			parallel_direct_read_data (&v);
			tmp = v;
#ifdef ARCADIA
		} else if (arcadia_bios) {
			tmp = arcadia_parport (0, ciaaprb, ciaadrb);
#endif
		} else if (currprefs.win32_samplersoundcard >= 0) {

			tmp = sampler_getsample ((ciabpra & 4) ? 1 : 0);

		} else
#endif

		{
			tmp = handle_parport_joystick (0, ciaaprb, ciaadrb);
			tmp = dongle_cia_read (1, reg, tmp);
#if DONGLE_DEBUG > 0
			if (notinrom())
				write_log (_T("BFE101 R %02X %s\n"), tmp, debuginfo(0));
#endif
		}
		if (ciaacrb & 2) {
			int pb7 = 0;
			if (ciaacrb & 4)
				pb7 = ciaacrb & 1;
			tmp &= ~0x80;
			tmp |= pb7 ? 0x80 : 00;
		}
		if (ciaacra & 2) {
			int pb6 = 0;
			if (ciaacra & 4)
				pb6 = ciaacra & 1;
			tmp &= ~0x40;
			tmp |= pb6 ? 0x40 : 00;
		}
		return tmp;
	case 2:
#if DONGLE_DEBUG > 0
		if (notinrom ())
			write_log (_T("BFE201 R %02X %s\n"), ciaadra, debuginfo(0));
#endif
		return ciaadra;
	case 3:
#if DONGLE_DEBUG > 0
		if (notinrom ())
			write_log (_T("BFE301 R %02X %s\n"), ciaadrb, debuginfo(0));
#endif
		return ciaadrb;
	case 4:
		return (uae_u8)((ciaata - ciaata_passed) & 0xff);
	case 5:
		return (uae_u8)((ciaata - ciaata_passed) >> 8);
	case 6:
		return (uae_u8)((ciaatb - ciaatb_passed) & 0xff);
	case 7:
		return (uae_u8)((ciaatb - ciaatb_passed) >> 8);
	case 8:
		if (ciaatlatch) {
			ciaatlatch = 0;
			return (uae_u8)ciaatol;
		} else
			return (uae_u8)ciaatod;
	case 9:
		if (ciaatlatch)
			return (uae_u8)(ciaatol >> 8);
		else
			return (uae_u8)(ciaatod >> 8);
	case 10:
		if (!ciaatlatch) { /* only if not already latched. A1200 confirmed. (TW) */
			/* no latching if ALARM is set */
			if (!(ciaacrb & 0x80))
				ciaatlatch = 1;
			ciaatol = ciaatod;
		}
		return (uae_u8)(ciaatol >> 16);
	case 12:
		return ciaasdr;
	case 13:
		tmp = ciaaicr_reg;
		ciaaicr &= ~ciaaicr_reg;
		ciaaicr_reg = 0;
		RethinkICRA ();
		return tmp;
	case 14:
		return ciaacra;
	case 15:
		return ciaacrb;
	}
	return 0;
}

static uae_u8 ReadCIAB (unsigned int addr)
{
	unsigned int tmp;
	int reg = addr & 15;

#if CIAB_DEBUG_R > 0
	if ((addr >= 8 && addr <= 10) || CIAB_DEBUG_R > 1)
		write_log (_T("R_CIAB: bfd%x00 %08X\n"), reg, M68K_GETPC);
#endif

	compute_passed_time ();

	switch (reg) {
	case 0:
		tmp = 0;
#ifdef SERIAL_PORT
		if (currprefs.use_serial)
			tmp = serial_readstatus(ciabdra);
#endif
#ifdef PARALLEL_PORT
		if (isprinter () > 0) {
			//tmp |= ciabpra & (0x04 | 0x02 | 0x01);
			tmp &= ~3; // clear BUSY and PAPEROUT
			tmp |= 4; // set SELECT
		} else if (isprinter () < 0) {
			uae_u8 v;
			parallel_direct_read_status (&v);
			tmp |= v & 7;
		} else {
			tmp |= handle_parport_joystick (1, ciabpra, ciabdra);
		}
#endif
		tmp = dongle_cia_read (1, reg, tmp);
#if DONGLE_DEBUG > 0
		if (notinrom ())
			write_log (_T("BFD000 R %02X %s\n"), tmp, debuginfo(0));
#endif
		return tmp;
	case 1:
#ifdef ACTION_REPLAY
		action_replay_ciaread ();
#endif
#if DONGLE_DEBUG > 0
		if (notinrom ())
			write_log (_T("BFD100 R %02X %s\n"), ciabprb, debuginfo(0));
#endif
		tmp = ciabprb;
		tmp = dongle_cia_read (1, reg, tmp);
		if (ciabcrb & 2) {
			int pb7 = 0;
			if (ciabcrb & 4)
				pb7 = ciabcrb & 1;
			tmp &= ~0x80;
			tmp |= pb7 ? 0x80 : 00;
		}
		if (ciabcra & 2) {
			int pb6 = 0;
			if (ciabcra & 4)
				pb6 = ciabcra & 1;
			tmp &= ~0x40;
			tmp |= pb6 ? 0x40 : 00;
		}
		return tmp;
	case 2:
		return ciabdra;
	case 3:
		return ciabdrb;
	case 4:
		return (uae_u8)((ciabta - ciabta_passed) & 0xff);
	case 5:
		return (uae_u8)((ciabta - ciabta_passed) >> 8);
	case 6:
		return (uae_u8)((ciabtb - ciabtb_passed) & 0xff);
	case 7:
		return (uae_u8)((ciabtb - ciabtb_passed) >> 8);
	case 8:
		if (ciabtlatch) {
			ciabtlatch = 0;
			return (uae_u8)ciabtol;
		} else
			return (uae_u8)ciabtod;
	case 9:
		if (ciabtlatch)
			return (uae_u8)(ciabtol >> 8);
		else
			return (uae_u8)(ciabtod >> 8);
	case 10:
		if (!ciabtlatch) {
			/* no latching if ALARM is set */
			if (!(ciabcrb & 0x80))
				ciabtlatch = 1;
			ciabtol = ciabtod;
		}
		return (uae_u8)(ciabtol >> 16);
	case 12:
		return ciabsdr;
	case 13:
		tmp = ciabicr_reg;
		ciabicr &= ~ciabicr_reg;
		ciabicr_reg = 0;
		RethinkICRB ();
		return tmp;
	case 14:
		//write_log (_T("CIABCRA READ %d %x\n"), ciabcra, M68K_GETPC);
		return ciabcra;
	case 15:
		return ciabcrb;
	}
	return 0;
}

static void WriteCIAA (uae_u16 addr, uae_u8 val)
{
	int reg = addr & 15;

#if CIAA_DEBUG_W > 0
	write_log (_T("W_CIAA: bfe%x01 %02X %08X\n"), reg, val, M68K_GETPC);
#endif
#ifdef ACTION_REPLAY
	ar_ciaa[reg] = val;
#endif
	if (!currprefs.cs_ciaoverlay && oldovl) {
		map_overlay (1);
		oldovl = 0;
	}
	switch (reg) {
	case 0:
#if DONGLE_DEBUG > 0
		if (notinrom ())
			write_log (_T("BFE001 W %02X %s\n"), val, debuginfo(0));
#endif
		ciaapra = (ciaapra & ~0xc3) | (val & 0xc3);
		bfe001_change ();
		handle_cd32_joystick_cia (ciaapra, ciaadra);
		dongle_cia_write (0, reg, val);
#ifdef AMAX
		if (currprefs.amaxromfile[0])
			amax_bfe001_write (val, ciaadra);
#endif
		break;
	case 1:
#if DONGLE_DEBUG > 0
		if (notinrom ())
			write_log (_T("BFE101 W %02X %s\n"), val, debuginfo(0));
#endif
		ciaaprb = val;
		dongle_cia_write (0, reg, val);
#ifdef PARALLEL_PORT
		if (isprinter() > 0) {
			doprinter (val);
			cia_parallelack ();
		} else if (isprinter() < 0) {
			parallel_direct_write_data (val, ciaadrb);
			cia_parallelack ();
#ifdef ARCADIA
		} else if (arcadia_bios) {
			arcadia_parport (1, ciaaprb, ciaadrb);
#endif
		}
#endif
		break;
	case 2:
#if DONGLE_DEBUG > 0
		if (notinrom ())
			write_log (_T("BFE201 W %02X %s\n"), val, debuginfo(0));
#endif
		ciaadra = val;
		dongle_cia_write (0, reg, val);
		bfe001_change ();
		break;
	case 3:
		ciaadrb = val;
		dongle_cia_write (0, reg, val);
#if DONGLE_DEBUG > 0
		if (notinrom ())
			write_log (_T("BFE301 W %02X %s\n"), val, debuginfo(0));
#endif
#ifdef ARCADIA
		if (arcadia_bios)
			arcadia_parport (1, ciaaprb, ciaadrb);
#endif
		break;
	case 4:
		CIA_update ();
		ciaala = (ciaala & 0xff00) | val;
		CIA_calctimers ();
		break;
	case 5:
		CIA_update ();
		ciaala = (ciaala & 0xff) | (val << 8);
		if ((ciaacra & 1) == 0)
			ciaata = ciaala;
		if (ciaacra & 8) {
			ciaata = ciaala;
			ciaacra |= 1;
			ciaastarta = CIASTARTCYCLESHI;
		}
		CIA_calctimers ();
		break;
	case 6:
		CIA_update ();
		ciaalb = (ciaalb & 0xff00) | val;
		CIA_calctimers ();
		break;
	case 7:
		CIA_update ();
		ciaalb = (ciaalb & 0xff) | (val << 8);
		if ((ciaacrb & 1) == 0)
			ciaatb = ciaalb;
		if (ciaacrb & 8) {
			ciaatb = ciaalb;
			ciaacrb |= 1;
			ciaastartb = CIASTARTCYCLESHI;
		}
		CIA_calctimers ();
		break;
	case 8:
		if (ciaacrb & 0x80) {
			ciaaalarm = (ciaaalarm & ~0xff) | val;
		} else {
			ciaatod = (ciaatod & ~0xff) | val;
			ciaatodon = 1;
			ciaa_checkalarm (0);
		}
		break;
	case 9:
		if (ciaacrb & 0x80) {
			ciaaalarm = (ciaaalarm & ~0xff00) | (val << 8);
		} else {
			ciaatod = (ciaatod & ~0xff00) | (val << 8);
		}
		break;
	case 10:
		if (ciaacrb & 0x80) {
			ciaaalarm = (ciaaalarm & ~0xff0000) | (val << 16);
		} else {
			ciaatod = (ciaatod & ~0xff0000) | (val << 16);
			ciaatodon = 0;
		}
		break;
	case 12:
		CIA_update ();
		ciaasdr = val;
		if ((ciaacra & 0x41) == 0x41 && ciaasdr_cnt == 0)
			ciaasdr_cnt = 8 * 2;
		CIA_calctimers ();
		break;
	case 13:
		setclr (&ciaaimask,val);
		break;
	case 14:
		CIA_update ();
		val &= 0x7f; /* bit 7 is unused */
		if ((val & 1) && !(ciaacra & 1))
			ciaastarta = CIASTARTCYCLESCRA;
		if ((val & 0x40) == 0 && (ciaacra & 0x40) != 0) {
			/* todo: check if low to high or high to low only */
			kblostsynccnt = 0;
#if KB_DEBUG
			write_log (_T("KB_ACK %02x->%02x\n"), ciaacra, val);
#endif
		}
		ciaacra = val;
		if (ciaacra & 0x10) {
			ciaacra &= ~0x10;
			ciaata = ciaala;
		}
		CIA_calctimers ();
		break;
	case 15:
		CIA_update ();
		if ((val & 1) && !(ciaacrb & 1))
			ciaastartb = CIASTARTCYCLESCRA;
		ciaacrb = val;
		if (ciaacrb & 0x10) {
			ciaacrb &= ~0x10;
			ciaatb = ciaalb;
		}
		CIA_calctimers ();
		break;
	}
}

static void WriteCIAB (uae_u16 addr, uae_u8 val)
{
	int reg = addr & 15;

#if CIAB_DEBUG_W > 0
	if ((addr >= 8 && addr <= 10) || CIAB_DEBUG_W > 1)
		write_log (_T("W_CIAB: bfd%x00 %02X %08X\n"), reg, val, M68K_GETPC);
#endif
#ifdef ACTION_REPLAY
	ar_ciab[reg] = val;
#endif
	switch (reg) {
	case 0:
#if DONGLE_DEBUG > 0
		if (notinrom ())
			write_log (_T("BFD000 W %02X %s\n"), val, debuginfo(0));
#endif
		dongle_cia_write (1, reg, val);
		ciabpra = val;
#ifdef SERIAL_PORT
		if (currprefs.use_serial)
			serial_writestatus(ciabpra, ciabdra);
#endif
#ifdef PARALLEL_PORT
		if (isprinter () < 0)
			parallel_direct_write_status (val, ciabdra);
#endif
		break;
	case 1:
#if DONGLE_DEBUG > 0
		if (notinrom ())
			write_log (_T("BFD100 W %02X %s\n"), val, debuginfo(0));
#endif
		dongle_cia_write (1, reg, val);
		ciabprb = val;
		DISK_select (val);
		break;
	case 2:
#if DONGLE_DEBUG > 0
		if (notinrom ())
			write_log (_T("BFD200 W %02X %s\n"), val, debuginfo(0));
#endif
		dongle_cia_write (1, reg, val);
		ciabdra = val;
#ifdef SERIAL_PORT
		if (currprefs.use_serial)
			serial_writestatus (ciabpra, ciabdra);
#endif
		break;
	case 3:
#if DONGLE_DEBUG > 0
		if (notinrom ())
			write_log (_T("BFD300 W %02X %s\n"), val, debuginfo(0));
#endif
		dongle_cia_write (1, reg, val);
		ciabdrb = val;
		break;
	case 4:
		CIA_update ();
		ciabla = (ciabla & 0xff00) | val;
		CIA_calctimers ();
		break;
	case 5:
		CIA_update ();
		ciabla = (ciabla & 0xff) | (val << 8);
		if ((ciabcra & 1) == 0)
			ciabta = ciabla;
		if (ciabcra & 8) {
			ciabta = ciabla;
			ciabcra |= 1;
			ciabstarta = CIASTARTCYCLESHI;
		}
		CIA_calctimers ();
		break;
	case 6:
		CIA_update ();
		ciablb = (ciablb & 0xff00) | val;
		CIA_calctimers ();
		break;
	case 7:
		CIA_update ();
		ciablb = (ciablb & 0xff) | (val << 8);
		if ((ciabcrb & 1) == 0)
			ciabtb = ciablb;
		if (ciabcrb & 8) {
			ciabtb = ciablb;
			ciabcrb |= 1;
			ciabstartb = CIASTARTCYCLESHI;
		}
		CIA_calctimers ();
		break;
	case 8:
		if (ciabcrb & 0x80) {
			ciabalarm = (ciabalarm & ~0xff) | val;
		} else {
			ciabtod = (ciabtod & ~0xff) | val;
			ciabtodon = 1;
			ciab_checkalarm (0);
		}
		break;
	case 9:
		if (ciabcrb & 0x80) {
			ciabalarm = (ciabalarm & ~0xff00) | (val << 8);
		} else {
			ciabtod = (ciabtod & ~0xff00) | (val << 8);
		}
		break;
	case 10:
		if (ciabcrb & 0x80) {
			ciabalarm = (ciabalarm & ~0xff0000) | (val << 16);
		} else {
			ciabtod = (ciabtod & ~0xff0000) | (val << 16);
			ciabtodon = 0;
		}
		break;
	case 12:
		CIA_update ();
		ciabsdr = val;
		if ((ciabcra & 0x40) == 0)
			ciabsdr_cnt = 0;
		if ((ciabcra & 0x41) == 0x41 && ciabsdr_cnt == 0)
			ciabsdr_cnt = 8 * 2;
		CIA_calctimers ();
		break;
	case 13:
		setclr (&ciabimask, val);
		break;
	case 14:
		CIA_update ();
		val &= 0x7f; /* bit 7 is unused */
		if ((val & 1) && !(ciabcra & 1))
			ciabstarta = CIASTARTCYCLESCRA;
		ciabcra = val;
		if (ciabcra & 0x10) {
			ciabcra &= ~0x10;
			ciabta = ciabla;
		}
		CIA_calctimers ();
		break;
	case 15:
		CIA_update ();
		if ((val & 1) && !(ciabcrb & 1))
			ciabstartb = CIASTARTCYCLESCRA;
		ciabcrb = val;
		if (ciabcrb & 0x10) {
			ciabcrb &= ~0x10;
			ciabtb = ciablb;
		}
		CIA_calctimers ();
		break;
	}
}

void cia_set_overlay (bool overlay)
{
	oldovl = overlay;
}

void CIA_reset (void)
{
#ifdef TOD_HACK
	tod_hack_tv = 0;
	tod_hack_tod = 0;
	tod_hack_enabled = 0;
	if (currprefs.tod_hack)
		tod_hack_enabled = TOD_HACK_TIME;
#endif

	kblostsynccnt = 0;
	serbits = 0;
	oldcd32mute = 1;
	oldled = true;
	resetwarning_phase = resetwarning_timer = 0;
	heartbeat_cnt = 0;

	if (!savestate_state) {
		oldovl = true;
		kbstate = 0;
		ciaatlatch = ciabtlatch = 0;
		ciaapra = 0; ciaadra = 0;
		ciaatod = ciabtod = 0; ciaatodon = ciabtodon = 0;
		ciaaicr = ciabicr = ciaaimask = ciabimask = 0;
		ciaacra = ciaacrb = ciabcra = ciabcrb = 0x4; /* outmode = toggle; */
		ciaala = ciaalb = ciabla = ciablb = ciaata = ciaatb = ciabta = ciabtb = 0xFFFF;
		ciaaalarm = ciabalarm = 0;
		ciabpra = 0x8C; ciabdra = 0;
		div10 = 0;
		ciaasdr_cnt = 0; ciaasdr = 0;
		ciabsdr_cnt = 0; ciabsdr = 0;
		ciaata_passed = ciaatb_passed = ciabta_passed = ciabtb_passed = 0;
		CIA_calctimers ();
		DISK_select_set (ciabprb);
	}
	map_overlay (0);
#ifdef SERIAL_PORT
	if (currprefs.use_serial && !savestate_state)
		serial_dtr_off (); /* Drop DTR at reset */
#endif
	if (savestate_state) {
		if (currprefs.cs_ciaoverlay) {
			oldovl = true;
		}
		bfe001_change ();
		if (!currprefs.cs_ciaoverlay) {
			map_overlay (oldovl ? 0 : 1);
		}
	}
#ifdef CD32
	if (!isrestore ()) {
		akiko_reset ();
		if (!akiko_init ())
			currprefs.cs_cd32cd = changed_prefs.cs_cd32cd = 0;
	}
#endif
}

void dumpcia (void)
{
	console_out_f (_T("A: CRA %02x CRB %02x ICR %02x IM %02x TA %04x (%04x) TB %04x (%04x)\n"),
		ciaacra, ciaacrb, ciaaicr, ciaaimask, ciaata, ciaala, ciaatb, ciaalb);
	console_out_f (_T("TOD %06x (%06x) ALARM %06x %c%c CYC=%08X\n"),
		ciaatod, ciaatol, ciaaalarm, ciaatlatch ? 'L' : ' ', ciaatodon ? ' ' : 'S', get_cycles ());
	console_out_f (_T("B: CRA %02x CRB %02x ICR %02x IM %02x TA %04x (%04x) TB %04x (%04x)\n"),
		ciabcra, ciabcrb, ciabicr, ciabimask, ciabta, ciabla, ciabtb, ciablb);
	console_out_f (_T("TOD %06x (%06x) ALARM %06x %c%c CLK=%d\n"),
		ciabtod, ciabtol, ciabalarm, ciabtlatch ? 'L' : ' ', ciabtodon ? ' ' : 'S', div10 / CYCLE_UNIT);
}

/* CIA memory access */

static uae_u32 REGPARAM3 cia_lget (uaecptr) REGPARAM;
static uae_u32 REGPARAM3 cia_wget (uaecptr) REGPARAM;
static uae_u32 REGPARAM3 cia_bget (uaecptr) REGPARAM;
static uae_u32 REGPARAM3 cia_lgeti (uaecptr) REGPARAM;
static uae_u32 REGPARAM3 cia_wgeti (uaecptr) REGPARAM;
static void REGPARAM3 cia_lput (uaecptr, uae_u32) REGPARAM;
static void REGPARAM3 cia_wput (uaecptr, uae_u32) REGPARAM;
static void REGPARAM3 cia_bput (uaecptr, uae_u32) REGPARAM;

addrbank cia_bank = {
	cia_lget, cia_wget, cia_bget,
	cia_lput, cia_wput, cia_bput,
	default_xlate, default_check, NULL, _T("CIA"),
	cia_lgeti, cia_wgeti, ABFLAG_IO
};

// Gayle or Fat Gary does not enable CIA /CS lines if both CIAs are selected
// Old Gary based Amigas enable both CIAs in this situation

STATIC_INLINE bool issinglecia (void)
{
	return currprefs.cs_ide || currprefs.cs_pcmcia || currprefs.cs_mbdmac;
}
STATIC_INLINE bool isgayle (void)
{
	return currprefs.cs_ide || currprefs.cs_pcmcia;
}

static void cia_wait_pre (void)
{
	if (currprefs.cachesize)
		return;

#ifndef CUSTOM_SIMPLE
	int div = (get_cycles () - eventtab[ev_cia].oldcycles) % DIV10;
	int cycles;

	if (div >= DIV10 * ECLOCK_DATA_CYCLE / 10) {
		cycles = DIV10 - div;
		cycles += DIV10 * ECLOCK_DATA_CYCLE / 10;
	} else if (div) {
		cycles = DIV10 + DIV10 * ECLOCK_DATA_CYCLE / 10 - div;
	} else {
		cycles = DIV10 * ECLOCK_DATA_CYCLE / 10 - div;
	}

	if (cycles) {
		if (currprefs.cpu_cycle_exact)
			x_do_cycles_pre (cycles);
		else
			do_cycles (cycles);
	}
#endif
}

static void cia_wait_post (uae_u32 value)
{
	if (currprefs.cachesize) {
		do_cycles (8 * CYCLE_UNIT /2);
	} else {
		int c = 6 * CYCLE_UNIT / 2;
		if (currprefs.cpu_cycle_exact)
			x_do_cycles_post (c, value);
		else
			do_cycles (c);
	}
}

static bool isgaylenocia (uaecptr addr)
{
	// gayle CIA region is only 4096 bytes at 0xbfd000 and 0xbfe000
	if (!isgayle ())
		return true;
	uaecptr mask = addr & 0xf000;
	bool cia = mask == 0xe000 || mask == 0xd000;
	return cia;
}

static uae_u32 REGPARAM2 cia_bget (uaecptr addr)
{
	int r = (addr & 0xf00) >> 8;
	uae_u8 v = 0xff;

#ifdef JIT
	special_mem |= S_READ;
#endif

	if (!isgaylenocia (addr))
		return v;

	cia_wait_pre ();
	switch ((addr >> 12) & 3) {
	case 0:
		if (!issinglecia ())
			v = (addr & 1) ? ReadCIAA (r) : ReadCIAB (r);
		break;
	case 1:
		v = (addr & 1) ? 0xff : ReadCIAB (r);
		break;
	case 2:
		v = (addr & 1) ? ReadCIAA (r) : 0xff;
		break;
	case 3:
		if (currprefs.cpu_model == 68000 && currprefs.cpu_compatible)
			v = (addr & 1) ? regs.irc : regs.irc >> 8;
		if (warned > 0 || currprefs.illegal_mem) {
			write_log (_T("cia_bget: unknown CIA address %08X=%02X PC=%08X\n"), addr, v & 0xff, M68K_GETPC);
			warned--;
		}
		break;
	}
	cia_wait_post (v);

	return v;
}

static uae_u32 REGPARAM2 cia_wget (uaecptr addr)
{
	int r = (addr & 0xf00) >> 8;
	uae_u16 v = 0xffff;

#ifdef JIT
	special_mem |= S_READ;
#endif

	if (!isgaylenocia (addr))
		return v;

	cia_wait_pre ();
	switch ((addr >> 12) & 3)
	{
	case 0:
		if (!issinglecia ())
			v = (ReadCIAB (r) << 8) | ReadCIAA (r);
		break;
	case 1:
		v = (ReadCIAB (r) << 8) | 0xff;
		break;
	case 2:
		v = (0xff << 8) | ReadCIAA (r);
		break;
	case 3:
		if (currprefs.cpu_model == 68000 && currprefs.cpu_compatible)
			v = regs.irc;
		if (warned > 0 || currprefs.illegal_mem) {
			write_log (_T("cia_wget: unknown CIA address %08X=%04X PC=%08X\n"), addr, v & 0xffff, M68K_GETPC);
			warned--;
		}
		break;
	}
	cia_wait_post (v);
	return v;
}

static uae_u32 REGPARAM2 cia_lget (uaecptr addr)
{
	uae_u32 v;
	v = cia_wget (addr) << 16;
	v |= cia_wget (addr + 2);
	return v;
}

static uae_u32 REGPARAM2 cia_wgeti (uaecptr addr)
{
	if (currprefs.cpu_model >= 68020)
		return dummy_wgeti (addr);
	return cia_wget (addr);
}
static uae_u32 REGPARAM2 cia_lgeti (uaecptr addr)
{
	if (currprefs.cpu_model >= 68020)
		return dummy_lgeti (addr);
	return cia_lget (addr);
}

static void REGPARAM2 cia_bput (uaecptr addr, uae_u32 value)
{
	int r = (addr & 0xf00) >> 8;

#ifdef JIT
	special_mem |= S_WRITE;
#endif

	if (!isgaylenocia (addr))
		return;

	cia_wait_pre ();
	if (!issinglecia () || (addr & 0x3000) != 0) {
		if ((addr & 0x2000) == 0)
			WriteCIAB (r, value);
		if ((addr & 0x1000) == 0)
			WriteCIAA (r, value);
		if (((addr & 0x3000) == 0x3000) && (warned > 0 || currprefs.illegal_mem)) {
			write_log (_T("cia_bput: unknown CIA address %08X=%082X PC=%08X\n"), addr, value & 0xff, M68K_GETPC);
			warned--;
		}
	}
	cia_wait_post (value);
}

static void REGPARAM2 cia_wput (uaecptr addr, uae_u32 value)
{
	int r = (addr & 0xf00) >> 8;

#ifdef JIT
	special_mem |= S_WRITE;
#endif

	if (!isgaylenocia (addr))
		return;

	cia_wait_pre ();
	if (!issinglecia () || (addr & 0x3000) != 0) {
		if ((addr & 0x2000) == 0)
			WriteCIAB (r, value >> 8);
		if ((addr & 0x1000) == 0)
			WriteCIAA (r, value & 0xff);
		if (((addr & 0x3000) == 0x3000) && (warned > 0 || currprefs.illegal_mem)) {
			write_log (_T("cia_wput: unknown CIA address %08X=%04X %08X\n"), addr, value & 0xffff, M68K_GETPC);
			warned--;
		}
	}
	cia_wait_post (value);
}

static void REGPARAM2 cia_lput (uaecptr addr, uae_u32 value)
{
	cia_wput (addr, value >> 16);
	cia_wput (addr + 2, value & 0xffff);
}

/* battclock memory access */

static uae_u32 REGPARAM3 clock_lget (uaecptr) REGPARAM;
static uae_u32 REGPARAM3 clock_wget (uaecptr) REGPARAM;
static uae_u32 REGPARAM3 clock_bget (uaecptr) REGPARAM;
static void REGPARAM3 clock_lput (uaecptr, uae_u32) REGPARAM;
static void REGPARAM3 clock_wput (uaecptr, uae_u32) REGPARAM;
static void REGPARAM3 clock_bput (uaecptr, uae_u32) REGPARAM;

addrbank clock_bank = {
	clock_lget, clock_wget, clock_bget,
	clock_lput, clock_wput, clock_bput,
	default_xlate, default_check, NULL, _T("Battery backed up clock (none)"),
	dummy_lgeti, dummy_wgeti, ABFLAG_IO
};

static unsigned int clock_control_d;
static unsigned int clock_control_e;
static unsigned int clock_control_f;

#define RF5C01A_RAM_SIZE 16
static uae_u8 rtc_memory[RF5C01A_RAM_SIZE], rtc_alarm[RF5C01A_RAM_SIZE];

static uae_u8 getclockreg (int addr, struct tm *ct)
{
	uae_u8 v = 0;

	if (currprefs.cs_rtc == 1 || currprefs.cs_rtc == 3) { /* MSM6242B */
		switch (addr) {
		case 0x0: v = ct->tm_sec % 10; break;
		case 0x1: v = ct->tm_sec / 10; break;
		case 0x2: v = ct->tm_min % 10; break;
		case 0x3: v = ct->tm_min / 10; break;
		case 0x4: v = ct->tm_hour % 10; break;
		case 0x5:
			if (clock_control_f & 4) {
				v = ct->tm_hour / 10; // 24h
			} else {
				v = (ct->tm_hour % 12) / 10; // 12h
				v |= ct->tm_hour >= 12 ? 4 : 0; // AM/PM bit
			}
			break;
		case 0x6: v = ct->tm_mday % 10; break;
		case 0x7: v = ct->tm_mday / 10; break;
		case 0x8: v = (ct->tm_mon + 1) % 10; break;
		case 0x9: v = (ct->tm_mon + 1) / 10; break;
		case 0xA: v = ct->tm_year % 10; break;
		case 0xB: v = (ct->tm_year / 10) & 0x0f;  break;
		case 0xC: v = ct->tm_wday; break;
		case 0xD: v = clock_control_d; break;
		case 0xE: v = clock_control_e; break;
		case 0xF: v = clock_control_f; break;
		}
	} else if (currprefs.cs_rtc == 2) { /* RF5C01A */
		int bank = clock_control_d & 3;
		/* memory access */
		if (bank >= 2 && addr < 0x0d)
			return (rtc_memory[addr] >> ((bank == 2) ? 0 : 4)) & 0x0f;
		/* alarm */
		if (bank == 1 && addr < 0x0d) {
			v = rtc_alarm[addr];
#if CLOCK_DEBUG
			write_log (_T("CLOCK ALARM R %X: %X\n"), addr, v);
#endif
			return v;
		}
		switch (addr) {
		case 0x0: v = ct->tm_sec % 10; break;
		case 0x1: v = ct->tm_sec / 10; break;
		case 0x2: v = ct->tm_min % 10; break;
		case 0x3: v = ct->tm_min / 10; break;
		case 0x4: v = ct->tm_hour % 10; break;
		case 0x5:
			if (rtc_alarm[10] & 1)
				v = ct->tm_hour / 10; // 24h
			else
				v = ((ct->tm_hour % 12) / 10) | (ct->tm_hour >= 12 ? 2 : 0); // 12h
		break;
		case 0x6: v = ct->tm_wday; break;
		case 0x7: v = ct->tm_mday % 10; break;
		case 0x8: v = ct->tm_mday / 10; break;
		case 0x9: v = (ct->tm_mon + 1) % 10; break;
		case 0xA: v = (ct->tm_mon + 1) / 10; break;
		case 0xB: v = (ct->tm_year % 100) % 10; break;
		case 0xC: v = (ct->tm_year % 100) / 10; break;
		case 0xD: v = clock_control_d; break;
		/* E and F = write-only, reads as zero */
		case 0xE: v = 0; break;
		case 0xF: v = 0; break;
		}
	}
#if CLOCK_DEBUG
	write_log(_T("CLOCK R: %X = %X, PC=%08x\n"), addr, v, M68K_GETPC);
#endif
	return v;
}

static void write_battclock (void)
{
	if (!currprefs.rtcfile[0] || currprefs.cs_rtc == 0)
		return;
	struct zfile *f = zfile_fopen (currprefs.rtcfile, _T("wb"));
	if (f) {
		uae_u8 zero[13] = { 0 };
		struct tm *ct;
		time_t t = time (0);
		t += currprefs.cs_rtc_adjust;
		ct = localtime (&t);
		uae_u8 od = clock_control_d;
		if (currprefs.cs_rtc == 2)
			clock_control_d &= ~3;
		for (int i = 0; i < 13; i++) {
			uae_u8 v = getclockreg (i, ct);
			zfile_fwrite (&v, 1, 1, f);
		}
		clock_control_d = od;
		zfile_fwrite (&clock_control_d, 1, 1, f);
		zfile_fwrite (&clock_control_e, 1, 1, f);
		zfile_fwrite (&clock_control_f, 1, 1, f);
		if (currprefs.cs_rtc == 2) {
			zfile_fwrite (rtc_alarm, RF5C01A_RAM_SIZE, 1, f);
			zfile_fwrite (rtc_memory, RF5C01A_RAM_SIZE, 1, f);
		}
		zfile_fclose (f);
	}
}

void rtc_hardreset (void)
{
	rtc_delayed_write = 0;
	if (currprefs.cs_rtc == 1 || currprefs.cs_rtc == 3) { /* MSM6242B */
		clock_bank.name = currprefs.cs_rtc == 1 ? _T("Battery backed up clock (MSM6242B)") : _T("Battery backed up clock A2000 (MSM6242B)");
		clock_control_d = 0x1;
		clock_control_e = 0;
		clock_control_f = 0x4; /* 24/12 */
	} else if (currprefs.cs_rtc == 2) { /* RF5C01A */
		clock_bank.name = _T("Battery backed up clock (RF5C01A)");
		clock_control_d = 0x8; /* Timer EN */
		clock_control_e = 0;
		clock_control_f = 0;
		memset (rtc_memory, 0, RF5C01A_RAM_SIZE);
		memset (rtc_alarm, 0, RF5C01A_RAM_SIZE);
		rtc_alarm[10] = 1; /* 24H mode */
	}
	if (currprefs.rtcfile[0]) {
		struct zfile *f = zfile_fopen (currprefs.rtcfile, _T("rb"));
		if (f) {
			uae_u8 empty[13];
			zfile_fread (empty, 13, 1, f);
			zfile_fread (&clock_control_d, 1, 1, f);
			zfile_fread (&clock_control_e, 1, 1, f);
			zfile_fread (&clock_control_f, 1, 1, f);
			zfile_fread (rtc_alarm, RF5C01A_RAM_SIZE, 1, f);
			zfile_fread (rtc_memory, RF5C01A_RAM_SIZE, 1, f);
			zfile_fclose (f);
		}
	}
}

static uae_u32 REGPARAM2 clock_lget (uaecptr addr)
{
	return (clock_wget (addr) << 16) | clock_wget (addr + 2);
}

static uae_u32 REGPARAM2 clock_wget (uaecptr addr)
{
	return (clock_bget (addr) << 8) | clock_bget (addr + 1);
}

static uae_u32 REGPARAM2 clock_bget (uaecptr addr)
{
	time_t t;
	struct tm *ct;
	uae_u8 v = 0;

#ifdef JIT
	special_mem |= S_READ;
#endif
#ifdef CDTV
	if (currprefs.cs_cdtvram && addr >= 0xdc8000)
		return cdtv_battram_read (addr);
#endif
	addr &= 0x3f;
	if ((addr & 3) == 2 || (addr & 3) == 0 || currprefs.cs_rtc == 0) {
		if (currprefs.cpu_model == 68000 && currprefs.cpu_compatible)
			v = regs.irc >> 8;
		return v;
	}
	t = time (0);
	t += currprefs.cs_rtc_adjust;
	ct = localtime (&t);
	addr >>= 2;
	return getclockreg (addr, ct);
}

static void REGPARAM2 clock_lput (uaecptr addr, uae_u32 value)
{
	clock_wput (addr, value >> 16);
	clock_wput (addr + 2, value);
}

static void REGPARAM2 clock_wput (uaecptr addr, uae_u32 value)
{
	clock_bput (addr, value >> 8);
	clock_bput (addr + 1, value);
}

static void REGPARAM2 clock_bput (uaecptr addr, uae_u32 value)
{
#ifdef JIT
	special_mem |= S_WRITE;
#endif
//	write_log(_T("W: %x (%x): %x, PC=%08x\n"), addr, (addr & 0xff) >> 2, value & 0xff, M68K_GETPC);
#ifdef CDTV
	if (currprefs.cs_cdtvram && addr >= 0xdc8000) {
		cdtv_battram_write (addr, value);
		return;
	}
#endif
	addr &= 0x3f;
	if ((addr & 1) != 1 || currprefs.cs_rtc == 0)
		return;
	addr >>= 2;
	value &= 0x0f;
	if (currprefs.cs_rtc == 1 || currprefs.cs_rtc == 3) { /* MSM6242B */
#if CLOCK_DEBUG
		write_log (_T("CLOCK W %X: %X\n"), addr, value);
#endif
		switch (addr)
		{
		case 0xD: clock_control_d = value & (1|8); break;
		case 0xE: clock_control_e = value; break;
		case 0xF: clock_control_f = value; break;
		}
	} else if (currprefs.cs_rtc == 2) { /* RF5C01A */
		int bank = clock_control_d & 3;
		/* memory access */
		if (bank >= 2 && addr < 0x0d) {
			uae_u8 ov = rtc_memory[addr];
			rtc_memory[addr] &= ((bank == 2) ? 0xf0 : 0x0f);
			rtc_memory[addr] |= value << ((bank == 2) ? 0 : 4);
			if (rtc_memory[addr] != ov)
				rtc_delayed_write = -1;
			return;
		}
		/* alarm */
		if (bank == 1 && addr < 0x0d) {
#if CLOCK_DEBUG
			write_log (_T("CLOCK ALARM W %X: %X\n"), addr, value);
#endif
			uae_u8 ov = rtc_alarm[addr];
			rtc_alarm[addr] = value;
			rtc_alarm[0] = rtc_alarm[1] = rtc_alarm[9] = rtc_alarm[12] = 0;
			rtc_alarm[3] &= ~0x8;
			rtc_alarm[5] &= ~0xc;
			rtc_alarm[6] &= ~0x8;
			rtc_alarm[8] &= ~0xc;
			rtc_alarm[10] &= ~0xe;
			rtc_alarm[11] &= ~0xc;
			if (rtc_alarm[addr] != ov)
				rtc_delayed_write = -1;
			return;
		}
#if CLOCK_DEBUG
		write_log (_T("CLOCK W %X: %X\n"), addr, value);
#endif
		switch (addr)
		{
		case 0xD: clock_control_d = value; break;
		case 0xE: clock_control_e = value; break;
		case 0xF: clock_control_f = value; break;
		}
	}
	rtc_delayed_write = -1;
}

#ifdef SAVESTATE

/* CIA-A and CIA-B save/restore code */

static void save_cia_prepare (void)
{
	CIA_update_check ();
	CIA_calctimers ();
	compute_passed_time ();
}

void restore_cia_start (void)
{
	/* Fixes very old statefiles without keyboard state */
	kbstate = 3;
	setcapslockstate (0);
	kblostsynccnt = 0;
}

void restore_cia_finish (void)
{
	eventtab[ev_cia].oldcycles = get_cycles ();
	CIA_update ();
	CIA_calctimers ();
	compute_passed_time ();
	eventtab[ev_cia].oldcycles -= div10;
	//dumpcia ();
	DISK_select_set (ciabprb);
}

uae_u8 *restore_cia (int num, uae_u8 *src)
{
	uae_u8 b;
	uae_u16 w;
	uae_u32 l;

	/* CIA registers */
	b = restore_u8 ();						/* 0 PRA */
	if (num) ciabpra = b; else ciaapra = b;
	b = restore_u8 ();						/* 1 PRB */
	if (num) ciabprb = b; else ciaaprb = b;
	b = restore_u8 ();						/* 2 DDRA */
	if (num) ciabdra = b; else ciaadra = b;
	b = restore_u8 ();						/* 3 DDRB */
	if (num) ciabdrb = b; else ciaadrb = b;
	w = restore_u16 ();						/* 4 TA */
	if (num) ciabta = w; else ciaata = w;
	w = restore_u16 ();						/* 6 TB */
	if (num) ciabtb = w; else ciaatb = w;
	l = restore_u8 ();						/* 8/9/A TOD */
	l |= restore_u8 () << 8;
	l |= restore_u8 () << 16;
	if (num) ciabtod = l; else ciaatod = l;
	restore_u8 ();							/* B unused */
	b = restore_u8 ();						/* C SDR */
	if (num) ciabsdr = b; else ciaasdr = b;
	b = restore_u8 ();						/* D ICR INFORMATION (not mask!) */
	if (num) ciabicr = b; else ciaaicr = b;
	b = restore_u8 ();						/* E CRA */
	if (num) ciabcra = b; else ciaacra = b;
	b = restore_u8 ();						/* F CRB */
	if (num) ciabcrb = b; else ciaacrb = b;

	/* CIA internal data */

	b = restore_u8 ();						/* ICR MASK */
	if (num) ciabimask = b; else ciaaimask = b;
	w = restore_u8 ();						/* timer A latch */
	w |= restore_u8 () << 8;
	if (num) ciabla = w; else ciaala = w;
	w = restore_u8 ();						/* timer B latch */
	w |= restore_u8 () << 8;
	if (num) ciablb = w; else ciaalb = w;
	w = restore_u8 ();						/* TOD latched value */
	w |= restore_u8 () << 8;
	w |= restore_u8 () << 16;
	if (num) ciabtol = w; else ciaatol = w;
	l = restore_u8 ();						/* alarm */
	l |= restore_u8 () << 8;
	l |= restore_u8 () << 16;
	if (num) ciabalarm = l; else ciaaalarm = l;
	b = restore_u8 ();
	if (num) ciabtlatch = b & 1; else ciaatlatch = b & 1;	/* is TOD latched? */
	if (num) ciabtodon = b & 2; else ciaatodon = b & 2;		/* is TOD stopped? */
	b = restore_u8 ();
	if (num)
		div10 = CYCLE_UNIT * b;
	b = restore_u8 ();
	if (num) ciabsdr_cnt = b; else ciaasdr_cnt = b;
	return src;
}

uae_u8 *save_cia (int num, int *len, uae_u8 *dstptr)
{
	uae_u8 *dstbak,*dst, b;
	uae_u16 t;

	if (dstptr)
		dstbak = dst = dstptr;
	else
		dstbak = dst = xmalloc (uae_u8, 1000);

	save_cia_prepare ();

	/* CIA registers */

	b = num ? ciabpra : ciaapra;				/* 0 PRA */
	save_u8 (b);
	b = num ? ciabprb : ciaaprb;				/* 1 PRB */
	save_u8 (b);
	b = num ? ciabdra : ciaadra;				/* 2 DDRA */
	save_u8 (b);
	b = num ? ciabdrb : ciaadrb;				/* 3 DDRB */
	save_u8 (b);
	t = (num ? ciabta - ciabta_passed : ciaata - ciaata_passed);/* 4 TA */
	save_u16 (t);
	t = (num ? ciabtb - ciabtb_passed : ciaatb - ciaatb_passed);/* 6 TB */
	save_u16 (t);
	b = (num ? ciabtod : ciaatod);				/* 8 TODL */
	save_u8 (b);
	b = (num ? ciabtod >> 8 : ciaatod >> 8);	/* 9 TODM */
	save_u8 (b);
	b = (num ? ciabtod >> 16 : ciaatod >> 16);	/* A TODH */
	save_u8 (b);
	save_u8 (0);								/* B unused */
	b = num ? ciabsdr : ciaasdr;				/* C SDR */
	save_u8 (b);
	b = num ? ciabicr : ciaaicr;				/* D ICR INFORMATION (not mask!) */
	save_u8 (b);
	b = num ? ciabcra : ciaacra;				/* E CRA */
	save_u8 (b);
	b = num ? ciabcrb : ciaacrb;				/* F CRB */
	save_u8 (b);

	/* CIA internal data */

	save_u8 (num ? ciabimask : ciaaimask);		/* ICR */
	b = (num ? ciabla : ciaala);				/* timer A latch LO */
	save_u8 (b);
	b = (num ? ciabla >> 8 : ciaala >> 8);		/* timer A latch HI */
	save_u8 (b);
	b = (num ? ciablb : ciaalb);				/* timer B latch LO */
	save_u8 (b);
	b = (num ? ciablb >> 8 : ciaalb >> 8);		/* timer B latch HI */
	save_u8 (b);
	b = (num ? ciabtol : ciaatol);				/* latched TOD LO */
	save_u8 (b);
	b = (num ? ciabtol >> 8 : ciaatol >> 8);	/* latched TOD MED */
	save_u8 (b);
	b = (num ? ciabtol >> 16 : ciaatol >> 16);	/* latched TOD HI */
	save_u8 (b);
	b = (num ? ciabalarm : ciaaalarm);			/* alarm LO */
	save_u8 (b);
	b = (num ? ciabalarm >> 8 : ciaaalarm >> 8);/* alarm MED */
	save_u8 (b);
	b = (num ? ciabalarm >> 16 : ciaaalarm >> 16);	/* alarm HI */
	save_u8 (b);
	b = 0;
	if (num)
		b |= ciabtlatch ? 1 : 0;
	else
		b |= ciaatlatch ? 1 : 0; /* is TOD latched? */
	if (num)
		b |= ciabtodon ? 2 : 0;
	else
		b |= ciaatodon ? 2 : 0;   /* TOD stopped? */
	save_u8 (b);
	save_u8 (num ? div10 / CYCLE_UNIT : 0);
	save_u8 (num ? ciabsdr_cnt : ciaasdr_cnt);
	*len = dst - dstbak;
	return dstbak;
}

uae_u8 *save_keyboard (int *len, uae_u8 *dstptr)
{
	uae_u8 *dst, *dstbak;
	if (dstptr)
		dstbak = dst = dstptr;
	else
		dstbak = dst = xmalloc (uae_u8, 4 + 4 + 1 + 1 + 1 + 1 + 1 + 2);
	save_u32 (getcapslockstate () ? 1 : 0);
	save_u32 (1);
	save_u8 (kbstate);
	save_u8 (0);
	save_u8 (0);
	save_u8 (0);
	save_u8 (kbcode);
	save_u16 (kblostsynccnt);
	*len = dst - dstbak;
	return dstbak;
}

uae_u8 *restore_keyboard (uae_u8 *src)
{
	setcapslockstate (restore_u32 () & 1);
	uae_u32 v = restore_u32 ();
	kbstate = restore_u8 ();
	restore_u8 ();
	restore_u8 ();
	 restore_u8 ();
	kbcode = restore_u8 ();
	kblostsynccnt = restore_u16 ();
	if (!(v & 1)) {
		kbstate = 3;
		kblostsynccnt = 0;
	}
	return src;
}

#endif /* SAVESTATE */