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Fix SuperDrive behaviour when there is no disk in. #182

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Merged
dingusdev merged 1 commit into from
Jun 1, 2026
Merged

Fix SuperDrive behaviour when there is no disk in. #182

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11 changes: 9 additions & 2 deletions devices/floppy/superdrive.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -150,11 +150,18 @@ void MacSuperDrive::set_motor_stat(uint8_t new_motor_stat)
this->track_start_time = 0;
this->sector_start_time = 0;
this->init_track_search(-1);
this->is_ready = 1;
// Only assert is_ready (SEEK_COMPLETE) when a disk is present.
// A real drive with no media can spin the motor but will never
// lock onto a track, so SEEK_COMPLETE stays de-asserted.
this->is_ready = this->has_disk;
LOG_F(INFO, "%s: turn spindle motor on", this->get_name().c_str());
} else {
this->motor_on_time = 0;
this->is_ready = 0;
// NB: do NOT clear is_ready here. Status address 0xE (Drive_Ready /
// SEEK_COMPLETE on Apple Drive Interface) reflects "no seek
// currently in progress", not motor state. Clearing it on motor-off
// makes the BeOS bootloader spin forever polling Drive_Ready after
// it asks the empty Superdrive to power down.
LOG_F(INFO, "%s: turn spindle motor off", this->get_name().c_str());
}
}
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