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Introduced a master 'is sleeping' flag. I'm starting to think there's a pattern forming here.

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This commit is contained in:
Thomas Harte 2017-08-20 10:43:53 -04:00
parent 8ce46b6e49
commit 2d9efccc98
2 changed files with 13 additions and 1 deletions
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12
Components/8272/i8272.cpp
View File

@ -91,6 +91,8 @@ i8272::i8272(BusHandler &bus_handler, Cycles clock_rate, int clock_rate_multipli
void i8272::run_for(Cycles cycles) {
Storage::Disk::MFMController::run_for(cycles);
if(is_sleeping_) return;
// check for an expired timer
if(delay_time_ > 0) {
if(cycles.as_int() >= delay_time_) {
@ -103,6 +105,7 @@ void i8272::run_for(Cycles cycles) {
// update seek status of any drives presently seeking
if(drives_seeking_) {
int drives_left = drives_seeking_;
for(int c = 0; c < 4; c++) {
if(drives_[c].phase == Drive::Seeking) {
drives_[c].step_rate_counter += cycles.as_int();
@ -122,6 +125,9 @@ void i8272::run_for(Cycles cycles) {
break;
}
}
drives_left--;
if(!drives_left) break;
}
}
}
@ -146,6 +152,8 @@ void i8272::run_for(Cycles cycles) {
}
}
}
is_sleeping_ = !delay_time_ && !drives_seeking_ && !head_timers_running_;
}
void i8272::set_register(int address, uint8_t value) {
@ -190,7 +198,7 @@ void i8272::set_disk(std::shared_ptr<Storage::Disk::Disk> disk, int drive) {
#define MS_TO_CYCLES(x) x * 8000
#define WAIT_FOR_EVENT(mask) resume_point_ = __LINE__; interesting_event_mask_ = (int)mask; return; case __LINE__:
#define WAIT_FOR_TIME(ms) resume_point_ = __LINE__; interesting_event_mask_ = (int)Event8272::Timer; delay_time_ = MS_TO_CYCLES(ms); case __LINE__: if(delay_time_) return;
#define WAIT_FOR_TIME(ms) resume_point_ = __LINE__; interesting_event_mask_ = (int)Event8272::Timer; delay_time_ = MS_TO_CYCLES(ms); is_sleeping_ = false; case __LINE__: if(delay_time_) return;
#define PASTE(x, y) x##y
#define CONCAT(x, y) PASTE(x, y)
@ -248,6 +256,7 @@ void i8272::set_disk(std::shared_ptr<Storage::Disk::Disk> disk, int drive) {
if(drives_[active_drive_].head_is_loaded[active_head_]) {\
if(drives_[active_drive_].head_unload_delay[active_head_] == 0) { \
head_timers_running_++; \
is_sleeping_ = false; \
} \
drives_[active_drive_].head_unload_delay[active_head_] = MS_TO_CYCLES(head_unload_time_);\
}
@ -701,6 +710,7 @@ void i8272::posit_event(int event_type) {
// Increment the seeking count if this drive wasn't already seeking.
if(drives_[drive].phase != Drive::Seeking) {
drives_seeking_++;
is_sleeping_ = false;
}
// Set currently seeking, with a step to occur right now (yes, it sounds like jamming these

2
Components/8272/i8272.hpp
View File

@ -128,6 +128,8 @@ class i8272: public Storage::Disk::MFMController {
// Internal registers.
uint8_t cylinder_, head_, sector_, size_;
// Master switch on not performing any work.
bool is_sleeping_;
};
}