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cia.cpp
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/*
* 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"
#include "uae/ppc.h"
#include "rommgr.h"
#define CIAA_DEBUG_R 0
#define CIAA_DEBUG_W 0
#define CIAA_DEBUG_IRQ 0
#define CIAB_DEBUG_R 0
#define CIAB_DEBUG_W 0
#define CIAB_DEBUG_IRQ 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;
/* 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 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;
}
}
/* delay interrupt after current CIA register access if
* interrupt would have triggered mid access
*/
static int cia_interrupt_disabled;
static int cia_interrupt_delay;
static void ICR (uae_u32 data)
{
INTREQ_0 (0x8000 | data);
}
static void ICRA (uae_u32 data)
{
ciaaicr |= 0x40;
#if 1
if (currprefs.cpu_cycle_exact && !(ciaaicr & 0x20) && (cia_interrupt_disabled & 1)) {
cia_interrupt_delay |= 1;
#if CIAB_DEBUG_IRQ
write_log(_T("ciab interrupt disabled ICR=%02X PC=%x\n"), ciabicr, M68K_GETPC);
#endif
return;
}
#endif
ciaaicr |= 0x20;
ICR (0x0008);
}
static void ICRB (uae_u32 data)
{
ciabicr |= 0x40;
#if 1
if (currprefs.cpu_cycle_exact && !(ciabicr & 0x20) && (cia_interrupt_disabled & 2)) {
cia_interrupt_delay |= 2;
#if CIAB_DEBUG_IRQ
write_log(_T("ciab interrupt disabled ICR=%02X PC=%x\n"), ciabicr, M68K_GETPC);
#endif
return;
}
#endif
ciabicr |= 0x20;
ICR (0x2000);
}
static void RethinkICRA (void)
{
if (ciaaicr & ciaaimask) {
#if CIAA_DEBUG_IRQ
write_log (_T("CIAA IRQ %02X\n"), ciaaicr);
#endif
if (!(ciaaicr & 0x80)) {
ciaaicr |= 0x80;
if (currprefs.cpu_cycle_exact) {
event2_newevent_xx (-1, DIV10 + 2 * CYCLE_UNIT + CYCLE_UNIT / 2, 0, ICRA);
} else {
ICRA (0x0008);
}
}
}
}
static void RethinkICRB (void)
{
if (ciabicr & ciabimask) {
#if CIAB_DEBUG_IRQ
write_log (_T("CIAB IRQ %02X\n"), ciabicr);
#endif
if (!(ciabicr & 0x80)) {
ciabicr |= 0x80;
if (currprefs.cpu_cycle_exact) {
event2_newevent_xx (-1, DIV10 + 2 * CYCLE_UNIT + CYCLE_UNIT / 2, 0, ICRB);
} else {
ICRB (0);
}
}
}
}
void rethink_cias (void)
{
if (ciaaicr & 0x40)
ICRA (0);
if (ciabicr & 0x40)
ICRB (0);
}
/* 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 bool checkalarm (unsigned long tod, unsigned long alarm, bool inc, int ab)
{
if (tod == alarm)
return true;
// if (!ab)
// return false;
if (!currprefs.cs_ciatodbug)
return false;
if (!inc)
return false;
/* 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 false;
if (((tod - 1) & 0xfff000) == alarm)
return true;
return false;
}
STATIC_INLINE bool ciab_checkalarm (bool inc, bool irq)
{
// 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 1
if ((munge24 (m68k_getpc ()) & 0xFFF80000) != 0xF80000) {
if (ciabtod == 0 && ciabalarm == 0)
return false;
}
#endif
if (checkalarm (ciabtod, ciabalarm, inc, 1)) {
#if CIAB_DEBUG_IRQ
write_log (_T("CIAB tod %08x %08x\n"), ciabtod, ciabalarm);
#endif
if (irq) {
ciabicr |= 4;
RethinkICRB ();
}
return true;
}
return false;
}
STATIC_INLINE void ciaa_checkalarm (bool inc)
{
if (checkalarm (ciaatod, ciaaalarm, inc, 0)) {
#if CIAA_DEBUG_IRQ
write_log (_T("CIAA tod %08x %08x\n"), ciaatod, ciaaalarm);
#endif
ciaaicr |= 4;
RethinkICRA ();
}
}
#ifdef TOD_HACK
static uae_u64 tod_hack_tv, tod_hack_tod, tod_hack_tod_last;
static int tod_hack_enabled;
static int tod_hack_delay;
static int tod_diff_cnt;
#define TOD_HACK_DELAY 50
#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;
tod_diff_cnt = 0;
}
#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);
if (rate >= 59 && rate <= 61)
rate = 60;
if (rate >= 49 && rate <= 51)
rate = 50;
} else if (currprefs.cs_ciaatod == 1) {
rate = 50;
} else {
rate = 60;
}
if (rate <= 0)
return;
if (rate != oldrate || (ciaatod & 0xfff) != (tod_hack_tod_last & 0xfff)) {
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;
if (tod_hack_delay > 0) {
tod_hack_delay--;
if (tod_hack_delay > 0)
return;
tod_hack_delay = TOD_HACK_DELAY;
}
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;
tod_diff_cnt += 1000000 - (1000000 / rate) * rate;
tod_hack_tv += tod_diff_cnt / rate;
tod_diff_cnt %= rate;
docount = 1;
}
if (docount) {
ciaatod++;
ciaatod &= 0x00ffffff;
tod_hack_tod_last = ciaatod;
ciaa_checkalarm (false);
}
}
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 || regs.halted > 0) {
/* 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=%02x (%02x)\n"), kbcode, (uae_u8)(~((kbcode >> 1) | (kbcode << 7))));
#endif
ciaasdr = kbcode;
kblostsynccnt = 8 * maxvpos * 8; // 8 frames * 8 bits.
ciaaicr |= 8;
RethinkICRA ();
}
/* All this complexity to lazy evaluate TOD increase.
* Only increase it cycle-exactly if it is visible to running program:
* causes interrupt or program is reading or writing TOD registers
*/
static int ciab_tod_hoffset;
static int ciab_tod_event_state;
// TOD increase has extra 14-16 E-clock delay
// Possibly TICK input pin has built-in debounce circuit
#define TOD_INC_DELAY (14 * (ECLOCK_DATA_CYCLE + ECLOCK_WAIT_CYCLE) / 2)
static void CIAB_tod_inc (bool irq)
{
ciab_tod_event_state = 3; // done
if (!ciaatodon)
return;
ciabtod++;
ciabtod &= 0xFFFFFF;
ciab_checkalarm (true, irq);
}
static void CIAB_tod_inc_event (uae_u32 v)
{
if (ciab_tod_event_state != 2)
return;
CIAB_tod_inc (true);
}
// Someone reads or writes TOD registers, sync TOD increase
static void CIAB_tod_check (void)
{
if (ciab_tod_event_state != 1 || !ciabtodon)
return;
int hpos = current_hpos ();
hpos -= ciab_tod_hoffset;
if (hpos >= 0 || currprefs.m68k_speed < 0) {
// Program should see the changed TOD
CIAB_tod_inc (true);
return;
}
// Not yet, add event to guarantee exact TOD inc position
ciab_tod_event_state = 2; // event active
event2_newevent_xx (-1, -hpos, 0, CIAB_tod_inc_event);
}
void CIAB_tod_handler (int hoffset)
{
if (!ciabtodon)
return;
ciab_tod_hoffset = hoffset + TOD_INC_DELAY;
ciab_tod_event_state = 1; // TOD inc needed
if (checkalarm ((ciabtod + 1) & 0xffffff, ciabalarm, true, 1)) {
// causes interrupt on this line, add event
ciab_tod_event_state = 2; // event active
event2_newevent_xx (-1, ciab_tod_hoffset, 0, CIAB_tod_inc_event);
}
}
static void check_keyboard(void)
{
if ((keys_available () || kbstate < 3) && !kblostsynccnt ) {
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 ();
}
}
void CIA_hsync_posthandler (bool dotod)
{
// Previous line was supposed to increase TOD but
// no one cared. Do it now.
if (ciab_tod_event_state == 1)
CIAB_tod_inc (false);
ciab_tod_event_state = 0;
if (currprefs.tod_hack && ciaatodon)
do_tod_hack (dotod);
if (resetwarning_phase) {
resetwarning_check ();
while (keys_available ())
get_next_key ();
} else {
if ((hsync_counter & 15) == 0)
check_keyboard();
}
}
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 (heartbeat_cnt > 0)
heartbeat_cnt--;
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
}
}
}
static void CIAA_tod_handler (uae_u32 v)
{
ciaatod++;
ciaatod &= 0xFFFFFF;
ciaa_checkalarm (true);
}
void CIAA_tod_inc (int cycles)
{
#ifdef TOD_HACK
if (currprefs.tod_hack && tod_hack_enabled == 1)
return;
#endif
if (!ciaatodon)
return;
event2_newevent_xx (-1, cycles + TOD_INC_DELAY, 0, CIAA_tod_handler);
}
static void check_led (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;
}
}
static void bfe001_change (void)
{
uae_u8 v = ciaapra;
check_led ();
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
if (CIAA_DEBUG_R > 1 || (munge24 (M68K_GETPC) & 0xFFF80000) != 0xF80000)
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