1) At the 2.1 meter telescope, You must restart caliban (type quit, and then type Caliban at the unix prompt) after restarting the WC. This is due to a hardware bug/feature on the serial port expander on lapis.

2) The RESTART command on the IC and WC, and the STARTUP command on prospero will fix 81.2% of the problems you'll encounter.

3) If data seems to be disappearing (IC reports exposures done, but no files are written), check the mount point on the IC (The long line in the status display that starts FileName:). Then try resetting the mount point anyway (the USE MOUNT command).

4)The WC program does not start automatically. Type WC at the DOS prompt. Also, for now, you must type RESTART at the WC on startup. You may have to type ARIEL as well.

5)There is no number 5

6) The IC and WC keyboards are highly exposed. This is unfortunate, as unexpected false keystrokes could cause unexpected results on both machines. If the IC or WC begin "acting up", check the keyboards for any objects that may have been placed on them. Ditto if either machine becomes unresponsive. It should be ok to disconnect the keyboard when not in use, and reconnect them when needed, but I don't guarantee it. This is can be done in the control room by disconnecting the keyboard connector where it joins the keyboard extension cable that runs into under the floor.

7) One of the keyboard cables at the 4 meter is flaky (symptom: the keyboard will stop working suddenly). Disconnecting and reconnecting the keyboard as described in 6 seems to fix this.

8)No comprehensive list of IC/WC/IE commands exists. A simple help utility is available on the IC and WC, but it is not detailed enough for use as a tutorial. The following commands have changed recently, and are important enough for special mention:

GRESET [n +CLAMP/-CLAMP] controls the number of global resets done on the detector before every , and the clamping voltage on the detector during the global reset.

POSTCLEAN n sets the number of read/reset/read cycles to be performed after the global reset.

LRESET [0/1 [+CLAMP/-CLAMP] controls whether resets are done before prereads, and the clamping voltage.

EXP [n [+CLAMP/-CLAMP] controls exposure time and the clamping voltage during integration.

These commands control the low-level operation of the detector, so use them with caution. The following settings seem to be "safe": Ask Darren Depoy. Other settings are at the user's risk.