Radio Shack TRS-80 DT-1 - DT-1 Hardware and Connections; DT-1 Connections and Controls Overview

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Figure 4. DT-l Connections and Controls
(1) RS-232 Connection Jack to connect the DT-l to a Host
computer, a modem, or a system network connector.
(2) SeriaI Printer Connection Jack
(3) Parallel Printer Connection Jack
(4) AC Power Cord
(5) Video Brightness Control
(6) Video Contrast Control
(7) On/Off Switch.
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