Radio Shack TRS-80 Model 4 - Page 345

Preventive Maintenance Interval
• Typical usage (3,000 power-on hours per year): Every 8,000
power-on hours
• Heavy usage
(8,000 power-on hours per year): Every 5,000
power-on hours
Required Media
• Radio Shack single-sided, 5-1/4-inch floppy disks
The Data Transfer Rate
is 250K bits per second.
Power Supply
Power Requirements
• 105-130 VAC, 60 Hz
•
240 VAC, 50 Hz (Australian)
•
220 VAC, 50 Hz (European)
• Grounded outlet
Maximum Current Drain
• 1.7 Amps
Typical Current Drain
• 1.5 Amps
Operating Temperature
• 55 to 80 degrees Fahrenheit
• 13 to 27 degrees Centigrade
Peripheral Interfaces
Standard
• Floppy disk input/output channel for connection of one or two
external floppy disk drives (Model 4 only)
• I/O bus for connection of hard disk and other peripherals
• Cassette I/O jack (Model 4 only)
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