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Discovered correct sense interrupt status result if nobody is in the completed seeking state, and switched to it. It's a single 0x80 rather than two bytes.

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Thomas Harte 2017-08-06 15:34:33 -04:00
parent 6c5b562d97
commit e6d4bb29d8
1 changed files with 4 additions and 3 deletions
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7
Components/8272/i8272.cpp
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@ -236,8 +236,7 @@ void i8272::posit_event(int type) {
sense_interrupt_status:
printf("Sense interrupt status\n");
// Find the first drive that is in the CompletedSeeking state and return for that;
// if none has done so then return 0xff for the sake of returning something.
// TODO: verify that fallback.
// if none has done so then return a single 0x80.
{
int found_drive = -1;
for(int c = 0; c < 4; c++) {
@ -249,9 +248,11 @@ void i8272::posit_event(int type) {
if(found_drive != -1) {
drives_[found_drive].phase = Drive::NotSeeking;
result_.push_back(drives_[found_drive].head_position);
result_.push_back(status_[0]);
} else {
result_.push_back(0x80);
}
}
result_.push_back(status_[0]);
goto post_result;
specify: