/* 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; }
bool Tape::LoadTrap () { if (!IsInserted()) return false; // If traps are disabled, try normal loading if (!GetOption(tapetraps)) { Play(); return false; } // Skip over any metadata blocks libspectrum_tape_block *block = libspectrum_tape_current_block(pTape); while (block && libspectrum_tape_block_metadata(block)) block = libspectrum_tape_select_next_block(pTape); // Nothing else to process? if (!block) return false; libspectrum_tape_type type = libspectrum_tape_block_type(block); libspectrum_tape_state_type state = libspectrum_tape_state(pTape); // Consider both ROM blocks (normal speed) and turbo blocks, as used by custom SAM tape speeds (DEVICE tX) if ((type != LIBSPECTRUM_TAPE_BLOCK_ROM && type != LIBSPECTRUM_TAPE_BLOCK_TURBO) || state != LIBSPECTRUM_TAPE_STATE_PILOT) { // Fall back on non-trap loading for anything else Play(); return false; } libspectrum_byte *pbData = libspectrum_tape_block_data(block); size_t nData = libspectrum_tape_block_data_length(block); // Base load address and load request size WORD wDest = HL; int nWanted = (read_byte(0x5ac8) << 16) | DE; // Fetch block type H = *pbData++; nData--; // Spectrum header? if (H == 0) { // Override request length nWanted = (nWanted & ~0xff) | 17; } // Otherwise the type byte must match the request else if (H != A_) { // Advance to next block libspectrum_tape_select_next_block(pTape); // Failed, exit via: RET NZ F &= ~(FLAG_C|FLAG_Z); PC = 0xe6f6; return true; } // Parity byte initialised to type byte L = H; // More still to load? while (nWanted >= 0) { // Are we out of source data? (ToDo: support continuation blocks?) if (!nData) { // Advance to next block libspectrum_tape_select_next_block(pTape); // Failed, exit via: RET NZ F &= ~(FLAG_C|FLAG_Z); PC = 0xe6f6; return true; } // Read next byte and update parity L ^= (H = *pbData++); nData--; // Request complete? if (!nWanted) break; // Write new byte write_byte(wDest, H); wDest++; nWanted--; // Destination now in the top 16K? if (wDest >= 0xc000) { // Slide paging up and move pointer back IO::OutHmpr(hmpr+1); wDest -= 0x4000; } } // Advance to next block libspectrum_tape_select_next_block(pTape); // Exit via: LD A,L ; CP 1 ; RET PC = 0xe739; return true; }
/* 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; }