6502/CLK
1
0
Fork 0
mirror of https://github.com/TomHarte/CLK.git synced 2024-12-24 12:30:17 +00:00
Code Issues Projects Releases Wiki Activity

Made an honest attempt at outputting turbo speed data block data. The CPC now at least starts to load.

Browse Source
This commit is contained in:
Thomas Harte 2017-08-02 14:24:34 -04:00
parent d7a5c3f49a
commit 2fd071e45d
1 changed files with 32 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
Storage/Tape/Formats/TZX.cpp
View File

@ -177,21 +177,42 @@ void TZX::get_standard_speed_data_block() {
} }
void TZX::get_turbo_speed_data_block() { void TZX::get_turbo_speed_data_block() {
__unused uint16_t length_of_pilot_pulse = fgetc16le(); uint16_t length_of_pilot_pulse = fgetc16le();
__unused uint16_t length_of_sync_first_pulse = fgetc16le(); uint16_t length_of_sync_first_pulse = fgetc16le();
__unused uint16_t length_of_sync_second_pulse = fgetc16le(); uint16_t length_of_sync_second_pulse = fgetc16le();
__unused uint16_t length_of_zero_bit_pulse = fgetc16le(); uint16_t length_of_zero_bit_pulse = fgetc16le();
__unused uint16_t length_of_one_bit_pulse = fgetc16le(); uint16_t length_of_one_bit_pulse = fgetc16le();
__unused uint16_t length_of_pilot_tone = fgetc16le(); uint16_t length_of_pilot_tone = fgetc16le();
__unused uint8_t number_of_bits_in_final_byte = (uint8_t)fgetc(file_); uint8_t number_of_bits_in_final_byte = (uint8_t)fgetc(file_);
__unused uint16_t pause_after_block = fgetc16le(); uint16_t pause_after_block = fgetc16le();
long data_length = fgetc16le(); long data_length = fgetc16le();
data_length |= (long)(fgetc(file_) << 16); data_length |= (long)(fgetc(file_) << 16);
printf("Skipping %lu bytes of turbo speed data\n", data_length); // Output pilot tone.
while(length_of_pilot_tone--) {
post_pulse(length_of_pilot_pulse);
}
// TODO output as described // Output sync pulses.
fseek(file_, data_length, SEEK_CUR); post_pulse(length_of_sync_first_pulse);
post_pulse(length_of_sync_second_pulse);
// Output data.
while(data_length--) {
uint8_t next_byte = (uint8_t)fgetc(file_);
int c = data_length ? 8 : number_of_bits_in_final_byte;
while(c--) {
uint16_t pulse_length = (next_byte & 0x80) ? length_of_one_bit_pulse : length_of_zero_bit_pulse;
next_byte <<= 1;
post_pulse(pulse_length);
post_pulse(pulse_length);
}
}
// Output gap.
post_gap(pause_after_block);
} }
void TZX::get_pure_tone_data_block() { void TZX::get_pure_tone_data_block() {