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cia.cpp
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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 "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 "ersatz.h"
#include "sampler.h"
#include "dongle.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 TOD_HACK
#define DIV10 (10 * CYCLE_UNIT / 2) /* Yes, a bad identifier. */
static unsigned int ciaaicr, ciaaimask, ciabicr, ciabimask;
static unsigned int ciaacra, ciaacrb, ciabcra, ciabcrb;
/* 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, kback, ciaasdr_unread;
static unsigned int sleepyhead;
static uae_u8 serbits;
static int warned = 10;
static void setclr (unsigned int *p, unsigned int val)
{
if (val & 0x80) {
*p |= val & 0x7F;
} else {
*p &= ~val;
}
}
#include "newcpu.h"
static void RethinkICRA (void)
{
if (ciaaimask & ciaaicr) {
ciaaicr |= 0x80;
send_interrupt (3, 2 * CYCLE_UNIT + CYCLE_UNIT / 2);
}
}
static void RethinkICRB (void)
{
if (ciabimask & ciabicr) {
ciabicr |= 0x80;
send_interrupt (13, 2 * CYCLE_UNIT + CYCLE_UNIT / 2);
}
}
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) {
assert ((ciaata + 1) >= ciaclocks);
ciaata_passed = ciaclocks;
}
if ((ciaacrb & 0x61) == 0x01) {
assert ((ciaatb + 1) >= ciaclocks);
ciaatb_passed = ciaclocks;
}
/* CIA B timers */
if ((ciabcra & 0x21) == 0x01) {
assert ((ciabta + 1) >= ciaclocks);
ciabta_passed = ciaclocks;
}
if ((ciabcrb & 0x61) == 0x01) {
assert ((ciabtb + 1) >= ciaclocks);
ciabtb_passed = ciaclocks;
}
}
/* 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 void CIA_update (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;
div10 = ccount % DIV10;
/* CIA A timers */
if ((ciaacra & 0x21) == 0x01) {
assert ((ciaata + 1) >= ciaclocks);
if ((ciaata + 1) == ciaclocks) {
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 -= ciaclocks;
}
if ((ciaacrb & 0x61) == 0x01) {
assert ((ciaatb + 1) >= ciaclocks);
if ((ciaatb + 1) == ciaclocks) aovflb = 1;
ciaatb -= ciaclocks;
}
/* CIA B timers */
if ((ciabcra & 0x21) == 0x01) {
assert ((ciabta + 1) >= ciaclocks);
if ((ciabta + 1) == ciaclocks) {
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 -= ciaclocks;
}
if ((ciabcrb & 0x61) == 0x01) {
assert ((ciabtb + 1) >= ciaclocks);
if ((ciabtb + 1) == ciaclocks) bovflb = 1;
ciabtb -= ciaclocks;
}
if (aovfla) {
ciaaicr |= 1; RethinkICRA ();
ciaata = ciaala;
if (ciaacra & 0x8) ciaacra &= ~1;
}
if (aovflb) {
ciaaicr |= 2; RethinkICRA ();
ciaatb = ciaalb;
if (ciaacrb & 0x8) ciaacrb &= ~1;
}
if (asp) {
ciaaicr |= 8; RethinkICRA ();
}
if (bovfla) {
ciabicr |= 1; RethinkICRB ();
ciabta = ciabla;
if (ciabcra & 0x8) ciabcra &= ~1;
}
if (bovflb) {
ciabicr |= 2; RethinkICRB ();
ciabtb = ciablb;
if (ciabcrb & 0x8) ciabcrb &= ~1;
}
if (bsp) {
ciabicr |= 8; 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;
eventtab[ev_cia].oldcycles = get_cycles ();
if ((ciaacra & 0x21) == 0x01) {
ciaatimea = (DIV10 - div10) + DIV10 * ciaata;
}
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. */
#if 0
ciaatimeb = ciaatimea + ciaala * DIV10 * ciaatb;
#endif
}
}
}
if ((ciaacrb & 0x61) == 0x01) {
ciaatimeb = (DIV10 - div10) + DIV10 * ciaatb;
}
if ((ciabcra & 0x21) == 0x01) {
ciabtimea = (DIV10 - div10) + DIV10 * ciabta;
}
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. */
#if 0
ciabtimeb = ciabtimea + ciabla * DIV10 * ciabtb;
#endif
}
}
}
if ((ciabcrb & 0x61) == 0x01) {
ciabtimeb = (DIV10 - div10) + DIV10 * ciabtb;
}
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)
{
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;
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 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 (tod_hack_enabled > 1) {
tod_hack_enabled--;
if (tod_hack_enabled == 1) {
write_log (L"TOD HACK enabled\n");
tod_hack_reset ();
}
return;
}
if (currprefs.cs_ciaatod == 0)
rate = vblank_hz;
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 (L"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)
{
ciaasdr = ~((keycode << 1) | (keycode >> 7));
}
static void sendrw (void)
{
setcode (AK_RESETWARNING);
ciaasdr_unread = 1;
ciaaicr |= 8;
RethinkICRA ();
write_log (L"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 (L"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 (L"KB: reset warning forced reset. Phase=%d\n", resetwarning_phase);
resetwarning_phase = -1;
uae_reset (0);
}
}
if (resetwarning_phase == 1) {
if (kback && !(ciaacra & 0x40) && ciaasdr_unread == 2) {
write_log (L"KB: reset warning second phase..\n");
resetwarning_phase = 2;
resetwarning_timer = maxvpos_nom * 5;
sendrw ();
}
} else if (resetwarning_phase == 2) {
if (ciaacra & 0x40) {
resetwarning_phase = 3;
write_log (L"KB: reset warning SP = output\n");
resetwarning_timer = 10 * maxvpos_nom * vblank_hz; /* wait max 10s */
}
} else if (resetwarning_phase == 3) {
if (!(ciaacra & 0x40)) {
write_log (L"KB: reset warning end by software. reset.\n");
resetwarning_phase = -1;
uae_reset (0);
}
}
}
void CIA_hsync_handler (int 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) && kback && (ciaacra & 0x40) == 0 && (hsync_counter & 15) == 0) {
/*
* This hack lets one possible ciaaicr cycle go by without any key
* being read, for every cycle in which a key is pulled out of the
* queue. If no hack is used, a lot of key events just get lost
* when you type fast. With a simple hack that waits for ciaasdr
* to be read before feeding it another, it will keep up until the
* queue gets about 14 characters ahead and then lose events, and
* the mouse pointer will freeze while typing is being taken in.
* With this hack, you can type 30 or 40 characters ahead with little
* or no lossage, and the mouse doesn't get stuck. The tradeoff is
* that the total slowness of typing appearing on screen is worse.
*/
if (ciaasdr_unread == 2) {
ciaasdr_unread = 0;
} else if (ciaasdr_unread == 0) {
switch (kbstate) {
case 0:
ciaasdr = 0; /* powerup resync */
kbstate++;
ciaasdr_unread = 3;
break;
case 1:
setcode (AK_INIT_POWERUP);
kbstate++;
ciaasdr_unread = 3;
break;
case 2:
setcode (AK_TERM_POWERUP);
kbstate++;
ciaasdr_unread = 3;
break;
case 3:
ciaasdr = ~get_next_key ();
ciaasdr_unread = 1; /* interlock to prevent lost keystrokes */
break;
}
ciaaicr |= 8;
RethinkICRA ();
sleepyhead = 0;
} else if (!(++sleepyhead & 15)) {
if (ciaasdr_unread == 3)
ciaaicr |= 8;
if (ciaasdr_unread < 3)
ciaasdr_unread = 0; /* give up on this key event after unread for a long time */
}
}
}
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_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 ();
}
void CIA_vsync_handler (int dotod)
{
led_vsync ();
#ifdef TOD_HACK
if (currprefs.tod_hack && tod_hack_enabled == 1)
return;
#endif
if (ciaatodon && dotod) {
ciaatod++;
ciaatod &= 0xFFFFFF;
ciaa_checkalarm (1);
}
}
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 || ersatzkickfile) {
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 (L"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 (L"BFE001 R %02X %s\n", tmp, debuginfo(0));
#endif
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 (L"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 (L"BFE201 R %02X %s\n", ciaadra, debuginfo(0));
#endif
return ciaadra;
case 3:
#if DONGLE_DEBUG > 0
if (notinrom ())
write_log (L"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:
if (ciaasdr_unread >= 1)
ciaasdr_unread = 2;
return ciaasdr;
case 13:
tmp = ciaaicr; ciaaicr = 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 (L"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 (L"BFD000 R %02X %s\n", tmp, debuginfo(0));
#endif
return tmp;
case 1:
#if DONGLE_DEBUG > 0
if (notinrom ())
write_log (L"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; ciabicr = 0; RethinkICRB ();
return tmp;
case 14:
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 (L"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 (L"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 (L"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 (L"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 (L"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;
}
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;
}
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 & 0x40) {
kback = 1;
} else {
ciaasdr_cnt = 0;
}
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 (!(ciaacra & 0x40) && (val & 0x40))
kback = 1;
ciaacra = val;
if (ciaacra & 0x10) {
ciaacra &= ~0x10;
ciaata = ciaala;
}
CIA_calctimers ();
break;
case 15:
CIA_update ();
ciaacrb = val;
if (ciaacrb & 0x10) {
ciaacrb &= ~0x10;
ciaatb = ciaalb;
}
CIA_calctimers ();
break;
}
}