Exemplo n.º 1
0
/* Load the next tape block into memory; returns 0 if a block was
   loaded (even if it had an tape loading error or equivalent) or
   non-zero if there was an error at the emulator level, or tape traps
   are not active */
int tape_load_trap( void )
{
  libspectrum_tape_block *block, *next_block;
  int error;

  /* Do nothing if tape traps aren't active, or the tape is already playing */
  if( !settings_current.tape_traps || tape_playing ) return 2;

  /* Do nothing if we're not in the correct ROM */
  if( !trap_check_rom( CHECK_TAPE_ROM ) ) return 3;

  /* Return with error if no tape file loaded */
  if( !libspectrum_tape_present( tape ) ) return 1;

  block = libspectrum_tape_current_block( tape );

  /* Skip over any meta-data blocks */
  while( libspectrum_tape_block_metadata( block ) ) {
    block = libspectrum_tape_select_next_block( tape );
    if( !block ) return 1;
  }
  
  /* If this block isn't a ROM loader, start the block playing. After
     that, return with `error' so that we actually do whichever
     instruction it was that caused the trap to hit */
  if( libspectrum_tape_block_type( block ) != LIBSPECTRUM_TAPE_BLOCK_ROM ||
      libspectrum_tape_state( tape ) != LIBSPECTRUM_TAPE_STATE_PILOT ) {
    tape_play( 1 );
    return -1;
  }

  /* We don't properly handle the case of partial loading, so don't run
     the traps in that situation */
  if( libspectrum_tape_block_data_length( block ) != DE + 2 ) {
    tape_play( 1 );
    return -1;
  }

  /* All returns made via the RET at #05E2, except on Timex 2068 at #0136 */
  if ( machine_current->machine == LIBSPECTRUM_MACHINE_TC2068 ||
       machine_current->machine == LIBSPECTRUM_MACHINE_TS2068 ) {
    PC = 0x0136;
  } else {
    PC = 0x05e2;
  }

  error = trap_load_block( block );
  if( error ) return error;

  /* Peek at the next block. If it's a ROM block, move along, initialise
     the block, and return */
  next_block = libspectrum_tape_peek_next_block( tape );

  if( libspectrum_tape_block_type(next_block) == LIBSPECTRUM_TAPE_BLOCK_ROM ) {

    next_block = libspectrum_tape_select_next_block( tape );
    if( !next_block ) return 1;

    ui_tape_browser_update( UI_TAPE_BROWSER_SELECT_BLOCK, NULL );

    return 0;
  }

  /* If the next block isn't a ROM block, set ourselves up such that the
     next thing to occur is the pause at the end of the current block */
  libspectrum_tape_set_state( tape, LIBSPECTRUM_TAPE_STATE_PAUSE );

  return 0;
}
Exemplo n.º 2
0
/* Load the next tape block into memory; returns 0 if a block was
   loaded (even if it had an tape loading error or equivalent) or
   non-zero if there was an error at the emulator level, or tape traps
   are not active */
int tape_load_trap(Z80Regs * regs)
{
  libspectrum_tape_block *block, *next_block;
  int error;

  /* Do nothing if tape traps aren't active, or the tape is already playing */
  if( !mconfig.flash_loading || tape_playing ) return 1;

  /* Do nothing if we're not in the correct ROM */
  //if( ! trap_check_rom() ) return 3;

  /* Return with error if no tape file loaded */
  if( !libspectrum_tape_present( tape ) ) return 1;

  block = libspectrum_tape_current_block( tape );

  /* Skip over any meta-data blocks */
  while( libspectrum_tape_block_metadata( block ) ) {
    block = libspectrum_tape_select_next_block( tape );
    if( !block ) return 1;
  }

  /* If this block isn't a ROM loader, start the block playing. After
     that, return with `error' so that we actually do whichever
     instruction it was that caused the trap to hit */
  if( libspectrum_tape_block_type( block ) != LIBSPECTRUM_TAPE_BLOCK_ROM 
   || libspectrum_tape_state( tape ) != LIBSPECTRUM_TAPE_STATE_PILOT  
  ) {
    tape_play( 1 );
    return /*-1*/1;
  }

  /* We don't properly handle the case of partial loading, so don't run
     the traps in that situation *///Esto hace cascar algunos games
   
  /* 
  if( libspectrum_tape_block_data_length( block ) != regs->DE.W + 2 ) {
    tape_play( 1 );
    return 1;
  }
  */
  
  error = trap_load_block( block , regs);//carga el bloque
  if( error ) return -1;

  /* Peek at the next block. If it's a ROM block, move along, initialise
     the block, and return */
  next_block = libspectrum_tape_peek_next_block( tape );

  if( libspectrum_tape_block_type(next_block) == LIBSPECTRUM_TAPE_BLOCK_ROM ) {

    next_block = libspectrum_tape_select_next_block( tape );
    if( !next_block ) return 1;

    //ui_tape_browser_update( UI_TAPE_BROWSER_SELECT_BLOCK, NULL );    

    return 0;//FLASHLOADED!
  }

  /* If the next block isn't a ROM block, set ourselves up such that the
     next thing to occur is the pause at the end of the current block */
     
  libspectrum_tape_set_state( tape, LIBSPECTRUM_TAPE_STATE_PAUSE );//TODO ? autodetect, sino no tira?
  //libspectrum_tape_block_set_state( block, LIBSPECTRUM_TAPE_STATE_PAUSE );
  
  /*
  error = tape_play(1);
  if( error ) return -1;
  */
  return 0;
  
}