gtpo1m0gOperations

Mode Selection

The control program operates in either normal mode or test mode. The mode selection affects system files and procedures, and is governed by the mode option byte in keypoint record A. The mode options can be changed at load time by patching keypoint record A. Mode selections result in the following conditions:

  Normal Mode Test Mode
Tapes
  • The CLOSE macro causes a rewind and unload (except as noted in the TCLSC macro).
  • Tape position is not affected by a restart.

  • All tapes that would normally be unloaded by a CLOSE or DISMOUNT macro are only rewound.

Control Program
  • No main storage is allocated for test driver keypoints.
  • Driver restart is automatically bypassed.
  • ZTEST command entries result in an INVALID ENTRY response.

  • Test drivers are started.
  • PTV is available for use.