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 normally would be unloaded by a CLOSE or DISMOUNT
macro or a ZTOFF command
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.
- CTIN status messages are suppressed during IPL.
|
- Test drivers are started.
- CTIN status messages are displayed during IPL.
|