void carga(void)
{
unsigned pc,sr,a0,a1,a2,a3,a4,a5,a6,a7,d0,d1,d2,d3,d4,d5,d6,d7;
FILE *f=fopen("/tmp/uae4all_guarda","rb");
if (f)
{
fread((void *)&pc,sizeof(unsigned),1,f);
fread((void *)&sr,sizeof(unsigned),1,f);
fread((void *)&a0,sizeof(unsigned),1,f);
fread((void *)&a1,sizeof(unsigned),1,f);
fread((void *)&a2,sizeof(unsigned),1,f);
fread((void *)&a3,sizeof(unsigned),1,f);
fread((void *)&a4,sizeof(unsigned),1,f);
fread((void *)&a5,sizeof(unsigned),1,f);
fread((void *)&a6,sizeof(unsigned),1,f);
fread((void *)&a7,sizeof(unsigned),1,f);
fread((void *)&d0,sizeof(unsigned),1,f);
fread((void *)&d1,sizeof(unsigned),1,f);
fread((void *)&d2,sizeof(unsigned),1,f);
fread((void *)&d3,sizeof(unsigned),1,f);
fread((void *)&d4,sizeof(unsigned),1,f);
fread((void *)&d5,sizeof(unsigned),1,f);
fread((void *)&d6,sizeof(unsigned),1,f);
fread((void *)&d7,sizeof(unsigned),1,f);
fread((void *)chipmemory,1,allocated_chipmem,f);
fclose(f);
{
unsigned char *p=(unsigned char *)chipmemory;
unsigned i;
for (i=0; i<allocated_chipmem; i+=2)
{
unsigned char t=p[i];
p[i]=p[i+1];
p[i+1]=t;
}
}
_68k_areg(0)=a0;
_68k_areg(1)=a1;
_68k_areg(2)=a2;
_68k_areg(3)=a3;
_68k_areg(4)=a4;
_68k_areg(5)=a5;
_68k_areg(6)=a6;
_68k_areg(7)=a7;
_68k_dreg(0)=d0;
_68k_dreg(1)=d1;
_68k_dreg(2)=d2;
_68k_dreg(3)=d3;
_68k_dreg(4)=d4;
_68k_dreg(5)=d5;
_68k_dreg(6)=d6;
_68k_dreg(7)=d7;
_68k_sreg=sr;
_68k_setpc(pc);
}
}
void REGPARAM2 call_calltrap(int func)
{
uae_u32 retval = 0;
int has_retval = (trapmode[func] & TRAPFLAG_NO_RETVAL) == 0;
int implicit_rts = (trapmode[func] & TRAPFLAG_DORET) != 0;
if (*trapstr[func] != 0 && trace_traps)
write_log ("TRAP: %s\n", trapstr[func]);
/* For monitoring only? */
if (traps[func] == NULL) {
_68k_setpc(trapoldfunc[func]);
fill_prefetch_0 ();
return;
}
if (func < max_trap) {
if (trapmode[func] & TRAPFLAG_EXTRA_STACK) {
execute_fn_on_extra_stack(traps[func], has_retval);
return;
}
retval = (*traps[func])();
} else
write_log ("illegal emulator trap\n");
if (has_retval)
_68k_dreg(0) = retval;
if (implicit_rts) {
#ifndef USE_FAME_CORE
m68k_do_rts ();
#else
/* WinUAE code - m68k_do_rts() */
_68k_setpc(get_long(_68k_areg(7)));
_68k_areg(7) += 4;
/*******************************/
#endif
fill_prefetch_0 ();
}
}
void ersatz_perform (uae_u16 what)
{
switch (what) {
case EOP_INIT:
ersatz_init ();
break;
case EOP_SERVEINT:
/* Just reset all the interrupt request bits */
put_word (0xDFF09C, get_word (0xDFF01E) & 0x3FFF);
break;
case EOP_DOIO:
ersatz_doio ();
break;
case EOP_AVAILMEM:
_68k_dreg(0) = _68k_dreg(1) & 4 ? 0 : 0x70000;
break;
case EOP_ALLOCMEM:
_68k_dreg(0) = _68k_dreg(1) & 4 ? 0 : 0x0F000;
break;
case EOP_ALLOCABS:
_68k_dreg(0) = _68k_areg(1);
break;
case EOP_NIMP:
write_log ("Unimplemented Kickstart function called\n");
uae_quit ();
/* fall through */
case EOP_LOOP:
_68k_setpc (0xF80010);
break;
case EOP_OPENLIB:
default:
write_log ("Internal error. Giving up.\n");
return;
}
}
static void do_stack_magic (TrapFunction f, void *s, int has_retval)
{
#ifdef CAN_DO_STACK_MAGIC
uaecptr a7;
jmp_buf *j = (jmp_buf *)s;
switch (setjmp (j[0])) {
case 0:
/* Returning directly */
current_extra_stack = s;
if (has_retval == -1) {
/*write_log ("finishing m68k mode return\n");*/
longjmp (j[1], 1);
}
/*write_log ("calling native function\n");*/
transfer_control (s, EXTRA_STACK_SIZE, stack_stub, f, has_retval);
/* not reached */
return;
case 1:
/*write_log ("native function complete\n");*/
/* Returning normally. */
if (stack_has_retval (s, EXTRA_STACK_SIZE))
_68k_dreg (0) = get_retval_from_stack (s, EXTRA_STACK_SIZE);
free_extra_stack (s);
break;
case 2:
/* Returning to do a m68k call. We're now back on the main stack. */
a7 = _68k_areg(7) -= (sizeof (void *) + 7) & ~3;
/* Save stack to restore */
*((void **)get_real_address (a7 + 4)) = s;
/* Save special return address: this address contains a
* calltrap that will longjmp to the right stack. */
put_long (_68k_areg (7), RTAREA_BASE + 0xFF00);
_68k_setpc (m68k_calladdr);
fill_prefetch_0 ();
/*write_log ("native function calls m68k\n");*/
break;
}
current_extra_stack = 0;
#endif
}
static void uae4all_reset(void)
{
int i;
#if !defined(USE_CYCLONE_CORE) && !defined(USE_FAME_CORE_ARM2)
m68k_set_context(&micontexto);
#endif
m68k_reset();
for(i=1; i<8; i++)
#if defined(DEBUG_INTERRUPTS)
M68KCONTEXT.interrupts[i]=0xFF;
#else
M68KCONTEXT.interrupts[i]=0x18+i;
#endif
M68KCONTEXT.interrupts[0]=0;
m68k_irq_update(0);
mispcflags=0;
_68k_areg(7) = get_long (0x00f80000);
_68k_setpc(get_long (0x00f80004));
//_68k_sreg = 0x2700; // already done by m68k_reset()
mispcflags=0;
#ifdef DEBUG_FRAMERATE
uae4all_update_time();
#endif
}
static void ersatz_init (void)
{
int f;
uaecptr request;
uaecptr a;
if (disk_empty (0)) {
write_log ("You need to have a diskfile in DF0 to use the Kickstart replacement!\n");
uae_quit ();
_68k_setpc (0xF80010);
return;
}
_68k_sreg = 0;
/* Set some interrupt vectors */
for (a = 8; a < 0xC0; a += 4) {
put_long (a, 0xF8001A);
}
_68k_ispreg = _68k_mspreg = _68k_uspreg = 0x800;
_68k_areg(7) = 0x80000;
#ifndef USE_FAME_CORE
_68k_intmask = 0;
#endif
/* Build a dummy execbase */
put_long (4, _68k_areg(6) = 0x676);
put_byte (0x676 + 0x129, 0);
for (f = 1; f < 105; f++) {
put_word (0x676 - 6*f, 0x4EF9);
put_long (0x676 - 6*f + 2, 0xF8000C);
}
/* Some "supported" functions */
put_long (0x676 - 456 + 2, 0xF80014);
put_long (0x676 - 216 + 2, 0xF80020);
put_long (0x676 - 198 + 2, 0xF80026);
put_long (0x676 - 204 + 2, 0xF8002c);
put_long (0x676 - 210 + 2, 0xF8002a);
/* Build an IORequest */
request = 0x800;
put_word (request + 0x1C, 2);
put_long (request + 0x28, 0x4000);
put_long (request + 0x2C, 0);
put_long (request + 0x24, 0x200 * 4);
_68k_areg(1) = request;
ersatz_doio ();
/* kickstart disk loader */
if (get_long(0x4000) == 0x4b49434b) {
/* a kickstart disk was found in drive 0! */
write_log ("Loading Kickstart rom image from Kickstart disk\n");
/* print some notes... */
write_log ("NOTE: if UAE crashes set CPU to 68000 and/or chipmem size to 512KB!\n");
/* read rom image from kickstart disk */
put_word (request + 0x1C, 2);
put_long (request + 0x28, 0xF80000);
put_long (request + 0x2C, 0x200);
put_long (request + 0x24, 0x200 * 512);
_68k_areg(1) = request;
ersatz_doio ();
/* read rom image once ajain to mirror address space.
not elegant, but it works... */
put_word (request + 0x1C, 2);
put_long (request + 0x28, 0xFC0000);
put_long (request + 0x2C, 0x200);
put_long (request + 0x24, 0x200 * 512);
_68k_areg(1) = request;
ersatz_doio ();
disk_eject (0);
_68k_setpc (0xFC0002);
fill_prefetch_0 ();
uae_reset ();
ersatzkickfile = 0;
return;
}
_68k_setpc (0x400C);
fill_prefetch_0 ();
/* Init the hardware */
put_long (0x3000, 0xFFFFFFFEul);
put_long (0xDFF080, 0x3000);
put_word (0xDFF088, 0);
put_word (0xDFF096, 0xE390);
put_word (0xDFF09A, 0xE02C);
put_word (0xDFF09E, 0x0000);
put_word (0xDFF092, 0x0038);
put_word (0xDFF094, 0x00D0);
put_word (0xDFF08E, 0x2C81);
put_word (0xDFF090, 0xF4C1);
put_word (0xDFF02A, 0x8000);
put_byte (0xBFD100, 0xF7);
put_byte (0xBFEE01, 0);
put_byte (0xBFEF01, 0x08);
put_byte (0xBFDE00, 0x04);
put_byte (0xBFDF00, 0x84);
put_byte (0xBFDD00, 0x9F);
put_byte (0xBFED01, 0x9F);
}