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Removed formal storage of ST3, as it just seems to be composed live. This may turn out also to be the best way to deal with ST0–2, time will tell. Also took a stab at the error in responding properly to the ROM's intended use of seek might be accepting new commands as replacements for old ones rather than rejecting them. That didn't seem to do the trick.

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This commit is contained in:
Thomas Harte 2017-08-06 22:10:12 -04:00
parent d63893a437
commit 3853966a1e
2 changed files with 14 additions and 11 deletions
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11
Components/8272/i8272.cpp
View File

@ -29,7 +29,7 @@ i8272::i8272(Cycles clock_rate, int clock_rate_multiplier, int revolutions_per_m
interesting_event_mask_((int)Event8272::CommandByte),
resume_point_(0),
delay_time_(0),
status_{0, 0, 0, 0} {
status_{0, 0, 0} {
posit_event((int)Event8272::CommandByte);
}
@ -91,7 +91,7 @@ uint8_t i8272::get_register(int address) {
return result;
} else {
// printf("8272 get main status\n");
// printf("Main status: %02x\n", main_status_);
return main_status_;
}
}
@ -150,6 +150,7 @@ void i8272::posit_event(int event_type) {
wait_for_complete_command_sequence:
main_status_ |= StatusRQM;
WAIT_FOR_EVENT(Event8272::CommandByte)
// printf(".");
main_status_ |= StatusCB;
main_status_ &= ~StatusRQM;
@ -325,12 +326,14 @@ void i8272::posit_event(int event_type) {
recalibrate:
seek:
printf((command_.size() > 2) ? "Seek\n" : "Recalibrate\n");
if(drives_[command_[1]&3].phase != Drive::Seeking) {
status_[0] = status_[1] = status_[2] = 0;
drives_[command_[1]&3].phase = Drive::Seeking;
drives_[command_[1]&3].steps_taken = 0;
drives_[command_[1]&3].target_head_position = (command_.size() > 2) ? command_[2] : -1;
drives_[command_[1]&3].step_rate_counter = 0;
main_status_ |= 1 << (command_[1]&3);
}
goto wait_for_command;
sense_interrupt_status:
@ -367,8 +370,8 @@ void i8272::posit_event(int event_type) {
goto wait_for_command;
sense_drive_status:
printf("Sense drive status\n");
result_stack_.push_back(status_[3]);
printf("Sense drive status unimplemented!!\n");
// result_stack_.push_back(status_[3]);
goto post_result;
invalid:

2
Components/8272/i8272.hpp
View File

@ -31,7 +31,7 @@ class i8272: public Storage::Disk::MFMController {
private:
void posit_event(int type);
uint8_t main_status_;
uint8_t status_[4];
uint8_t status_[3];
std::vector<uint8_t> command_;
std::vector<uint8_t> result_stack_;