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Added a broad phase on whether seeking is ongoing.

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This commit is contained in:
Thomas Harte 2017-08-07 12:12:59 -04:00
parent 56d65ba6f3
commit d07f3216ab
1 changed files with 17 additions and 15 deletions
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32
Components/8272/i8272.cpp
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@ -47,22 +47,24 @@ void i8272::run_for(Cycles cycles) {
}
// update seek status of any drives presently seeking
for(int c = 0; c < 4; c++) {
if(drives_[c].phase == Drive::Seeking) {
drives_[c].step_rate_counter += cycles.as_int();
int steps = drives_[c].step_rate_counter / (8000 * step_rate_time_);
drives_[c].step_rate_counter %= (8000 * step_rate_time_);
while(steps--) {
// Perform a step.
int direction = (drives_[c].target_head_position < drives_[c].head_position) ? -1 : 1;
drives_[c].drive->step(direction);
drives_[c].head_position += direction;
if(main_status_ & 0xf) {
for(int c = 0; c < 4; c++) {
if(drives_[c].phase == Drive::Seeking) {
drives_[c].step_rate_counter += cycles.as_int();
int steps = drives_[c].step_rate_counter / (8000 * step_rate_time_);
drives_[c].step_rate_counter %= (8000 * step_rate_time_);
while(steps--) {
// Perform a step.
int direction = (drives_[c].target_head_position < drives_[c].head_position) ? -1 : 1;
drives_[c].drive->step(direction);
drives_[c].head_position += direction;
// Check for completion.
if(seek_is_satisfied(c)) {
drives_[c].phase = Drive::CompletedSeeking;
if(drives_[c].target_head_position == -1) drives_[c].head_position = 0;
break;
// Check for completion.
if(seek_is_satisfied(c)) {
drives_[c].phase = Drive::CompletedSeeking;
if(drives_[c].target_head_position == -1) drives_[c].head_position = 0;
break;
}
}
}
}