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;
}
void
tape_next_edge( libspectrum_dword last_tstates, int type, void *user_data )
{
libspectrum_error libspec_error;
libspectrum_tape_block *block;
libspectrum_dword edge_tstates;
int flags;
/* If the tape's not playing, just return */
if( ! tape_playing ) return;
/* Get the time until the next edge */
libspec_error = libspectrum_tape_get_next_edge( &edge_tstates, &flags,
tape );
if( libspec_error != LIBSPECTRUM_ERROR_NONE ) return;
/* Invert the microphone state */
if( edge_tstates ||
!( flags & LIBSPECTRUM_TAPE_FLAGS_NO_EDGE ) ||
( flags & ( LIBSPECTRUM_TAPE_FLAGS_STOP |
LIBSPECTRUM_TAPE_FLAGS_LEVEL_LOW |
LIBSPECTRUM_TAPE_FLAGS_LEVEL_HIGH ) ) ) {
if( flags & LIBSPECTRUM_TAPE_FLAGS_NO_EDGE ) {
/* Do nothing */
} else if( flags & LIBSPECTRUM_TAPE_FLAGS_LEVEL_LOW ) {
tape_microphone = 0;
} else if( flags & LIBSPECTRUM_TAPE_FLAGS_LEVEL_HIGH ) {
tape_microphone = 1;
} else {
tape_microphone = !tape_microphone;
}
}
sound_beeper( last_tstates, tape_microphone );
/* If we've been requested to stop the tape, do so and then
return without stacking another edge */
if( ( flags & LIBSPECTRUM_TAPE_FLAGS_STOP ) ||
( ( flags & LIBSPECTRUM_TAPE_FLAGS_STOP48 ) &&
( !( libspectrum_machine_capabilities( machine_current->machine ) &
LIBSPECTRUM_MACHINE_CAPABILITY_128_MEMORY
)
)
)
)
{
tape_stop();
return;
}
/* If that was the end of a block, update the browser */
if( flags & LIBSPECTRUM_TAPE_FLAGS_BLOCK ) {
ui_tape_browser_update( UI_TAPE_BROWSER_SELECT_BLOCK, NULL );
/* If the tape was started automatically, tape traps are active
and the new block is a ROM loader, stop the tape and return
without putting another event into the queue */
block = libspectrum_tape_current_block( tape );
if( tape_autoplay && settings_current.tape_traps &&
libspectrum_tape_block_type( block ) == LIBSPECTRUM_TAPE_BLOCK_ROM
) {
tape_stop();
return;
}
}
/* Otherwise, put this into the event queue; remember that this edge
should occur 'edge_tstates' after the last edge, not after the
current time (these will be slightly different as we only process
events between instructions). */
event_add( last_tstates + edge_tstates, tape_edge_event );
/* Store length flags for acceleration purposes */
loader_set_acceleration_flags( flags );
}
/* 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;
}
/* 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;
}
int
tape_next_edge(Z80Regs *regs, int *edge_tstates, int *bit)
{
int error; libspectrum_error libspec_error;
libspectrum_tape_block *block;
//libspectrum_dword edge_tstates;
int flags;
*edge_tstates = 0;
*bit=-1;
int one_value=0;
/* If the tape's not playing, just return */
if( ! tape_playing ) return 0;
block = libspectrum_tape_current_block( tape );
int type = libspectrum_tape_block_type( block );
if(type==LIBSPECTRUM_TAPE_BLOCK_ROM ||
type==LIBSPECTRUM_TAPE_BLOCK_TURBO ||
type==LIBSPECTRUM_TAPE_BLOCK_PURE_DATA /*||
type==LIBSPECTRUM_TAPE_BLOCK_RAW_DATA*/)
{
int state = libspectrum_tape_state( tape );
if(state==LIBSPECTRUM_TAPE_STATE_DATA1 || state==LIBSPECTRUM_TAPE_STATE_DATA2)
{
if(block->type==LIBSPECTRUM_TAPE_BLOCK_TURBO)
{
one_value = block->types.turbo.bit1_length;
}
else if(block->type==LIBSPECTRUM_TAPE_BLOCK_PURE_DATA)
{
one_value = block->types.pure_data.bit1_length;
}
else
{
one_value = 1710;
}
}
}
/* Get the time until the next edge */
libspectrum_dword tmp = 0;
libspec_error = libspectrum_tape_get_next_edge(&tmp, &flags, tape);
*edge_tstates = tmp;
if(one_value!=0)
*bit = *edge_tstates == one_value ? 1 : 0;
//edge_tstates_target = edge_tstates_target+*edge_tstates;
if( libspec_error != LIBSPECTRUM_ERROR_NONE ) return libspec_error;
/* Invert the microphone state */
if( *edge_tstates || ( flags & LIBSPECTRUM_TAPE_FLAGS_STOP ) ) {
if( flags & LIBSPECTRUM_TAPE_FLAGS_NO_EDGE ) {
// Do nothing
} else if( flags & LIBSPECTRUM_TAPE_FLAGS_LEVEL_LOW ) {
tape_microphone = 0;
} else if( flags & LIBSPECTRUM_TAPE_FLAGS_LEVEL_HIGH ) {
tape_microphone = 1;
} else {
tape_microphone = !tape_microphone;
}
if(regs!=NULL)
sound_beeper_1(tape_microphone,regs->IPeriod-regs->ICount);//TODO: poner pref
}
/* If we've been requested to stop the tape, do so and then
return without stacking another edge */
int zx48=0;
if(regs!=NULL)
zx48=regs->IPeriod==69888;
if((flags & LIBSPECTRUM_TAPE_FLAGS_STOP) || ( zx48 && (flags & LIBSPECTRUM_TAPE_FLAGS_STOP48) ) )
{
error = tape_stop(); if( error ) return error;
return 0;
}
/* If that was the end of a block, update the browser */
if( flags & LIBSPECTRUM_TAPE_FLAGS_BLOCK ) {
//ui_tape_browser_update( UI_TAPE_BROWSER_SELECT_BLOCK, NULL );
/* If the tape was started automatically, tape traps are active
and the new block is a ROM loader, stop the tape and return
without putting another event into the queue */
block = libspectrum_tape_current_block( tape );
if( /*tape_autoplay &&*/ mconfig.flash_loading &&
libspectrum_tape_block_type( block ) == LIBSPECTRUM_TAPE_BLOCK_ROM
) {
error = tape_stop(); if( error ) return error;
return 0;//TODO: devolver valor que nos diga que nos diga que no hay que devolver otro edge?
}
}
/* Otherwise, put this into the event queue; remember that this edge
should occur 'edge_tstates' after the last edge, not after the
current time (these will be slightly different as we only process
events between instructions). */
return 0;
}
int
main(int argc, char *argv[])
{
int opt, i, quiet = 0;
char *output = "output.tzx", *p;
int turbo_params[6] = { 2168, 3323, 667, 735, 855, 1710 };
FILE *fd;
size_t data_len;
libspectrum_tape *tape;
libspectrum_byte *data;
libspectrum_tape_block *block;
libspectrum_dword pause, pause_tstates;
while ((opt = getopt(argc, argv, "vhqt:o:")) != -1)
{
switch(opt)
{
case 'q':
quiet = 1;
break;
case 't':
if (sscanf(optarg, "%i:%i:%i:%i:%i:%i", &turbo_params[0],
&turbo_params[1], &turbo_params[2], &turbo_params[3],
&turbo_params[4], &turbo_params[5]) != 6)
fatal(argv[0], "Failed to parse turbo params");
break;
case 'o':
output = strdup(optarg);
break;
case 'h':
help(argv[0]);
exit(0);
case 'v':
fprintf(stderr, VERSION "\n");
exit(0);
default:
fprintf(stderr, "\n");
help(argv[0]);
exit(1);
}
}
if (optind >= argc)
fatal(argv[0], "Expected input filename to process");
if (libspectrum_init())
fatal(argv[0], "Failed to init libspectrum");
fd = fopen(argv[optind], "rb");
if (!fd)
fatal(argv[0], "Failed to open input file");
fseek(fd, 0, SEEK_END);
data_len = ftell(fd);
fseek(fd, 0, SEEK_SET);
data = (libspectrum_byte *) malloc(data_len);
if (!data)
{
fclose(fd);
fatal(argv[0], "Failed to allocate memory");
}
if (fread(data, sizeof(libspectrum_byte), data_len, fd) != data_len)
{
fclose(fd);
free(data);
fatal(argv[0], "Failed to read input file");
}
fclose(fd);
tape = libspectrum_tape_alloc();
if (!tape)
{
fclose(fd);
free(data);
fatal(argv[0], "Failed to allocate tape memory");
}
if (libspectrum_tape_read(tape, data, data_len, LIBSPECTRUM_ID_UNKNOWN, argv[optind]))
{
fclose(fd);
free(data);
free(tape);
fatal(argv[0], "Failed to read tape");
}
free(data);
for (i = optind + 1; i < argc; i++)
{
for (p = argv[i]; *p && isdigit(*p); p++);
if (*p)
{
fprintf(stderr, "WARNING: Parameter is not a valid block number, skipping\n");
continue;
}
if (libspectrum_tape_nth_block(tape, atoi(argv[i])))
continue;
block = libspectrum_tape_current_block(tape);
if (!block)
continue;
if (!quiet)
printf("%s: Setting block #%i (type 0x%02x): ", argv[0], atoi(argv[i]),
libspectrum_tape_block_type(block));
data = libspectrum_tape_block_data(block);
data_len = libspectrum_tape_block_data_length(block);
pause = libspectrum_tape_block_pause(block);
pause_tstates = libspectrum_tape_block_pause_tstates(block);
if (libspectrum_tape_block_set_type(block, LIBSPECTRUM_TAPE_BLOCK_TURBO)
|| libspectrum_tape_block_set_pilot_pulses(block, turbo_params[1])
|| libspectrum_tape_block_set_pilot_length(block, turbo_params[0])
|| libspectrum_tape_block_set_sync1_length(block, turbo_params[2])
|| libspectrum_tape_block_set_sync2_length(block, turbo_params[3])
|| libspectrum_tape_block_set_bit0_length(block, turbo_params[4])
|| libspectrum_tape_block_set_bit1_length(block, turbo_params[5])
|| libspectrum_tape_block_set_data(block, data)
|| libspectrum_tape_block_set_data_length(block, data_len)
|| libspectrum_tape_block_set_pause(block, pause)
|| libspectrum_tape_block_set_pause_tstates(block, pause_tstates)
|| libspectrum_tape_block_set_bits_in_last_byte(block, 8)
)
{
if (!quiet)
printf("failed!\n");
fprintf(stderr, "WARNING: Failed to set block %i\n", atoi(argv[i]));
continue;
}
if (!quiet)
printf("OK\n");
}
data = NULL;
data_len = 0;
if (libspectrum_tape_write(&data, &data_len, tape, LIBSPECTRUM_ID_TAPE_TZX))
{
free(tape);
fatal(argv[0], "Failed to write the output file");
}
fd = fopen(output, "wb");
if (!fd)
{
free(data);
free(tape);
fatal(argv[0], "Failed to open output file");
}
if (fwrite(data, sizeof(libspectrum_byte), data_len, fd) != data_len)
{
fclose(fd);
free(data);
free(tape);
fatal(argv[0], "Failed to write output file");
}
fclose(fd);
free(data);
free(tape);
exit(0);
}
