Tandy Radio Shack TRS-80 User Manual

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Connecting A Terminal To Your Computer (see Figure 3)
First, check which connector you're using for the terminal.
If it is either SeriaI Channel A or B, you will need a
RS-232 cable (Cat. No. 26-4403) and a null modem adapter
(Cat. No. 26-1496) for each terminal.
1. Connect one end of the RS-232 cable to the terminales
RS-232 jack (seriaI output).
2. Connect the other end of the cable to the female plug
of the null modem adapter.
3. Connect the adapter's male plug to either SeriaI
Channel A or B of your computer.
If the terminal connects to one of the three connectors on
the Multiterminal Interface pca, you will need only the
RS-232 cable assembly.
NOTE: A null modem adapter is NOT needed for ports 4, 5,
and 6.
Checking Installation
Correct installation of the Multiterminal Interface is ensured
when the following commands typed into the computer running
TRS-XENIX produce the noted responses.
Type in the following command (from root):
disable ttyOX (enter)
NOTE: OX = one of the tty terminaIs, either 4, 5, or 6.
For exarnple, tty04.
Response
There will be no response or the following message will
appear:
disable: ttyOX is already disabled
disable: /etc/ttys not updated (which is OK)
NOTE: Port 3 is not used
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Tandy Radio Shack TRS-80 Specifications

Operating Environment

temperature range	32 to 104° F (0 to 40° C)
storage range	-40 to 149° F (-40 to 65 ° C)
ambient humidity	10 to 80% Relative (non-condensing)

Other Specifications

maximum movement	4.5" (110mm) horizontal and vertical
cable length	5ft (1.5m)

Weight and Dimensions

length	3.5" (90mm)
width	2.5" (62mm)
height	1.3" (34mm)
weight	6.8oz (210 grs)