Radio Shack TRS-80 Model III - Specifications; AC Power Supply; Microprocessor; RS-232-C Interface

OPERATION
14
/
Specifications
AC
Power
Supply
This applies to
non-disk systems
only . For disk
systems, see the Disk System
Owner's
Manual.
Power
Requirements
Current Drain
105
-130
VAC,
60 Hz
(240
VAC, 50 Hz
Australian)
(220
VAC, 50 Hz
European)
0.83
Amps RMS
Microprocessor
Type
Clock Rate
Z-80
2.02752 MHz
RS-232-C
Interface
Standard
RS-232-C
Signal
Pin#
PG
Protective Ground
1
TD
Transmit Data
2
RD
Receive Data
3
RTS
Request To Send
4
CTS
Clear To Send
5
DSR
Data Set
Ready
6
SG
Signal Ground
7
CD
Carrier
Detect
8
DTR Data
Terminal Ready
20
Rl Ring Indicator
22
STD*
Secondary
Transmit Data
14
SUN*
Secondary
Unassigned
18
S
RTS*
Secondary
Request To Send
19
*Note: These signals are
not
used for the secondary
functions,
but
are reserved for
future
use.
89