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Setting Up a New Drive (Profiling Tool)
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Disk Change/Ready (line 34)
The preferred mode for the Applesauce is READY.
Many drives have a jumper to select the meaning of line 34, DISK CHANGE/READY (DCRY)1):
- In READY mode, line 34 becomes active after the motor has turned on and two index holes have passed. This means that a disk is present and that the drive is up to speed.
- In DISK CHANGE mode, line 34 goes inactive when a disk is ejected and becomes active when a new disk is put in the drive.
The Applesauce will work correctly with either setting. During drive setup, the Profiling tool will try to automatically detect the signal the drive is sending. If the drive sends READY, then the Applesauce will wait for READY after the MOTOR ON signal before doing anything else. If the drive sends DISK CHANGE, then the Applesauce will wait a fixed about of time after the MOTOR ON signal. (Otherwise, DISK CHANGE is ignored.)
Thus, in READY mode, you can typically save a couple of hundred milliseconds on MOTOR ON.2)