Radio Shack TRS-80, Service Manual, Page: 8 / 44

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SPECIFICATIONS
Power Supply
AC/AC adaptor Input 120V/60Hz
Output 8.0V/1.5A 16W
RF Modulator Ch. FC (MHz) Fsc (MHz)
For U.S.A./CANADA 3 61.25 +/-0.25 4.5 +/-0.2
4 67.65 4.5
Output Impedance 75 ohm
RF Output Terminal RCA jack
RF Output Level 1.5 - 2.8 mV at 75 ohm
Central Processing Unit
6803 8-bit processor
clock speed 0.89 MHz
Memory Size
ROM (for BASIC) 8K
RAM 4K (expandable up to
20K-external)
Video Display
Character display 512 (32 x 16) upper case
characters
Semi-Graphic display 64 x 32 elements
Color 8 colors - Green, Yellow,
Blue, Red, Buff, Cyan, Magenta, Orange
Interface
Printer RS232C, 4 pin DIN
Cassette 5-pin DIN 1500 baud
Bus line 34-pin Cartridge connector
Switch Box
Isolation more than 60 dB
Dimensions
8-1/2" x 1-7/8” x 7”
Weight
1.75 Ibs (.7875 kilograms)