Light writing.
3 Num Lock Light When the Num Lock light is on, the numeric
keypad is activated.
4 Caps Lock Light When the Caps Lock light is on, all letters
typed will be capitalized.
5 Scroll Lock Light When the Scroll Lock light is on, the
screen will not scroll.
6 Diskette Drive Turns on when the diskette drive is reading
Activity Light or writing.
7 Diskette Eject Button Ejects a loaded diskette.
8 Power (On/Off) Switch Turns the computer on and off.
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Chapter 1.6 Rear Panel Controls and Connectors
The controls and connectors located on the rear of the DT3 and DT4 are
almost identical. They are identified in Figure 1-4 and described in
Table 1-6. See Appendix A for connector pin assignments.