3/ Usiilg' The Dt-L - Radio Shack TRS-80 DT-1 Owner's Manual

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3/ Using the DT-l
Press the On/Off Switch ta turn the DT-l ON. The red Power
On light (to the right of the Keypad) will then illuminate.
Figure 8. DT-lOn/Off Switch
If the DT-l isn't connected to and communicating with a Host
when you turn the power on, a Cursor will appear in the
upper left corner of the Screen after a few seconds. The
cursor may be a small white rectangle instead of the
underline shown, and may be flashing on and off.
If the Terminal is connected to and communicating with a
Host System, what appears on the Screen on power-up will
depend on the Host system.
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