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Added enough shovelling to write rubbish for an entire sector.

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This commit is contained in:
Thomas Harte 2016-12-25 15:46:49 -05:00
parent ec55a25620
commit d2ad2c756e
4 changed files with 111 additions and 16 deletions
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45
Components/1770/1770.cpp
View File

@ -277,6 +277,12 @@ void WD1770::process_index_hole()
}
}
void WD1770::process_write_completed()
{
posit_event(Event::DataWritten);
}
// +------+----------+-------------------------+
// ! ! ! BITS !
// ! TYPE ! COMMAND ! 7 6 5 4 3 2 1 0 !
@ -620,8 +626,47 @@ void WD1770::posit_event(Event new_event_type)
for(int b = 0; b < 16; b++)
write_bit(!(b&1));
}
// printf("%d\n", counter);
WAIT_FOR_EVENT(Event::DataWritten);
distance_into_section_ = 0;
type2_write_loop:
// TODO: real data
for(int b = 0; b < 16; b++)
write_bit(!(b&1));
update_status([] (Status &status) {
status.data_request = true;
});
WAIT_FOR_EVENT(Event::DataWritten);
distance_into_section_++;
if(distance_into_section_ == 128 << header_[3])
{
goto type2_write_crc;
}
if(status_.data_request)
{
update_status([] (Status &status) {
status.lost_data = true;
});
goto wait_for_command;
}
type2_write_crc:
// TODO: write CRC and FF
for(int b = 0; b < 48; b++)
write_bit(!(b&1));
WAIT_FOR_EVENT(Event::DataWritten);
end_writing();
if(command_ & 0x10)
{
sector_++;
goto test_type2_write_protection;
}
printf("Wrote sector %d\n", sector_);
goto wait_for_command;
begin_type_3:
update_status([] (Status &status) {
status.type = Status::Three;

6
Components/1770/1770.hpp
View File

@ -110,9 +110,10 @@ class WD1770: public Storage::Disk::Controller {
Token = (1 << 1), // Indicates recognition of a new token in the flux stream. Interrogate latest_token_ for details.
IndexHole = (1 << 2), // Indicates the passing of a physical index hole.
HeadLoad = (1 << 3), // Indicates the head has been loaded (1973 only).
DataWritten = (1 << 4), // Indicates that all queued bits have been written
Timer = (1 << 4), // Indicates that the delay_time_-powered timer has timed out.
IndexHoleTarget = (1 << 5) // Indicates that index_hole_count_ has reached index_hole_count_target_.
Timer = (1 << 5), // Indicates that the delay_time_-powered timer has timed out.
IndexHoleTarget = (1 << 6) // Indicates that index_hole_count_ has reached index_hole_count_target_.
};
void posit_event(Event type);
int interesting_event_mask_;
@ -131,6 +132,7 @@ class WD1770: public Storage::Disk::Controller {
// Storage::Disk::Controller
virtual void process_input_bit(int value, unsigned int cycles_since_index_hole);
virtual void process_index_hole();
virtual void process_write_completed();
};
}

20
Storage/Disk/DiskController.cpp
View File

@ -67,7 +67,12 @@ void Controller::run_for_cycles(int number_of_cycles)
{
int cycles_until_next_event = (int)get_cycles_until_next_event();
int cycles_to_run_for = std::min(cycles_until_next_event, number_of_cycles);
if(!is_reading_ && cycles_until_bits_written_ > zero) cycles_to_run_for = std::min(cycles_to_run_for, (int)cycles_until_bits_written_.get_unsigned_int());
if(!is_reading_ && cycles_until_bits_written_ > zero)
{
int write_cycles_target = (int)cycles_until_bits_written_.get_unsigned_int();
if(cycles_until_bits_written_.length % cycles_until_bits_written_.clock_rate) write_cycles_target++;
cycles_to_run_for = std::min(cycles_to_run_for, write_cycles_target);
}
cycles_since_index_hole_ += (unsigned int)cycles_to_run_for;
@ -78,17 +83,20 @@ void Controller::run_for_cycles(int number_of_cycles)
}
else
{
if(cycles_until_bits_written_ > Storage::Time(0))
if(cycles_until_bits_written_ > zero)
{
Storage::Time number_of_cycles_time(number_of_cycles);
if(cycles_until_bits_written_ < number_of_cycles_time)
Storage::Time cycles_to_run_for_time(cycles_to_run_for);
if(cycles_until_bits_written_ < cycles_to_run_for_time)
{
cycles_until_bits_written_.set_zero();
process_write_completed();
if(cycles_until_bits_written_ < cycles_to_run_for_time)
cycles_until_bits_written_.set_zero();
else
cycles_until_bits_written_ -= cycles_to_run_for_time;
}
else
{
cycles_until_bits_written_ -= number_of_cycles_time;
cycles_until_bits_written_ -= cycles_to_run_for_time;
}
}
}

56
Storage/Storage.hpp
View File

@ -89,30 +89,70 @@ struct Time {
inline Time operator + (const Time &other) const
{
uint64_t result_length = (uint64_t)length * (uint64_t)other.clock_rate + (uint64_t)other.length * (uint64_t)clock_rate;
uint64_t result_clock_rate = (uint64_t)clock_rate * (uint64_t)other.clock_rate;
uint64_t result_length;
uint64_t result_clock_rate;
if(clock_rate == other.clock_rate)
{
result_length = (uint64_t)length + (uint64_t)other.length;
result_clock_rate = clock_rate;
}
else
{
result_length = (uint64_t)length * (uint64_t)other.clock_rate + (uint64_t)other.length * (uint64_t)clock_rate;
result_clock_rate = (uint64_t)clock_rate * (uint64_t)other.clock_rate;
}
return Time(result_length, result_clock_rate);
}
inline Time &operator += (const Time &other)
{
uint64_t result_length = (uint64_t)length * (uint64_t)other.clock_rate + (uint64_t)other.length * (uint64_t)clock_rate;
uint64_t result_clock_rate = (uint64_t)clock_rate * (uint64_t)other.clock_rate;
uint64_t result_length;
uint64_t result_clock_rate;
if(clock_rate == other.clock_rate)
{
result_length = (uint64_t)length + (uint64_t)other.length;
result_clock_rate = (uint64_t)clock_rate;
}
else
{
result_length = (uint64_t)length * (uint64_t)other.clock_rate + (uint64_t)other.length * (uint64_t)clock_rate;
result_clock_rate = (uint64_t)clock_rate * (uint64_t)other.clock_rate;
}
install_result(result_length, result_clock_rate);
return *this;
}
inline Time operator - (const Time &other) const
{
uint64_t result_length = (uint64_t)length * (uint64_t)other.clock_rate - (uint64_t)other.length * (uint64_t)clock_rate;
uint64_t result_clock_rate = (uint64_t)clock_rate * (uint64_t)other.clock_rate;
uint64_t result_length;
uint64_t result_clock_rate;
if(clock_rate == other.clock_rate)
{
result_length = (uint64_t)length - (uint64_t)other.length;
result_clock_rate = clock_rate;
}
else
{
result_length = (uint64_t)length * (uint64_t)other.clock_rate - (uint64_t)other.length * (uint64_t)clock_rate;
result_clock_rate = (uint64_t)clock_rate * (uint64_t)other.clock_rate;
}
return Time(result_length, result_clock_rate);
}
inline Time operator -= (const Time &other)
{
uint64_t result_length = (uint64_t)length * (uint64_t)other.clock_rate - (uint64_t)other.length * (uint64_t)clock_rate;
uint64_t result_clock_rate = (uint64_t)clock_rate * (uint64_t)other.clock_rate;
uint64_t result_length;
uint64_t result_clock_rate;
if(clock_rate == other.clock_rate)
{
result_length = (uint64_t)length - (uint64_t)other.length;
result_clock_rate = (uint64_t)clock_rate;
}
else
{
result_length = (uint64_t)length * (uint64_t)other.clock_rate - (uint64_t)other.length * (uint64_t)clock_rate;
result_clock_rate = (uint64_t)clock_rate * (uint64_t)other.clock_rate;
}
install_result(result_length, result_clock_rate);
return *this;
}