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Added support for the ID 20 block and fixed a minor error in my skip-the-contents version of block 11: length is three bytes long, not two. This gives me enough structure properly to get to the end of my current test CDT, albeit without making any of the noises.

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This commit is contained in:
Thomas Harte 2017-08-02 14:12:34 -04:00
parent 819761f9fb
commit d7a5c3f49a
2 changed files with 16 additions and 1 deletions
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16
Storage/Tape/Formats/TZX.cpp
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@ -56,12 +56,14 @@ void TZX::get_next_pulses() {
return;
}
// printf("TZX %ld\n", ftell(file_));
switch(chunk_id) {
case 0x10: get_standard_speed_data_block(); break;
case 0x11: get_turbo_speed_data_block(); break;
case 0x12: get_pure_tone_data_block(); break;
case 0x13: get_pulse_sequence(); break;
case 0x19: get_generalised_data_block(); break;
case 0x20: get_pause(); break;
case 0x30: {
// Text description. Ripe for ignoring.
@ -183,7 +185,10 @@ void TZX::get_turbo_speed_data_block() {
__unused uint16_t length_of_pilot_tone = fgetc16le();
__unused uint8_t number_of_bits_in_final_byte = (uint8_t)fgetc(file_);
__unused uint16_t pause_after_block = fgetc16le();
uint16_t data_length = fgetc16le();
long data_length = fgetc16le();
data_length |= (long)(fgetc(file_) << 16);
printf("Skipping %lu bytes of turbo speed data\n", data_length);
// TODO output as described
fseek(file_, data_length, SEEK_CUR);
@ -203,6 +208,15 @@ void TZX::get_pulse_sequence() {
}
}
void TZX::get_pause() {
uint16_t duration = fgetc16le();
if(!duration) {
// TODO (maybe): post a 'pause the tape' suggestion
} else {
post_gap(duration);
}
}
#pragma mark - Output
void TZX::post_pulse(unsigned int length) {

1
Storage/Tape/Formats/TZX.hpp
View File

@ -42,6 +42,7 @@ class TZX: public PulseQueuedTape, public Storage::FileHolder {
void get_pure_tone_data_block();
void get_pulse_sequence();
void get_generalised_data_block();
void get_pause();
void get_generalised_segment(uint32_t output_symbols, uint8_t max_pulses_per_symbol, uint8_t number_of_symbols, bool is_data);