GE 235 System Manual page 64

TAPE CONTROLLER
Each controller can direct the operations of up to 8 tape handlers.
Up to 7 controllers (with a total of 56 tape handlers) can be connected to the GE-235
system.
Provides logic f o r selecting the tape handler, and for reading, writing and rewinding the
magnetic tape.
Monitors the flow of data between tape handlers and memory.
Initiates and times the starting and stopping of the selected tape handler.
Detects the beginning of tape, end-of-tape, and end-of-file record.
Ensures reliability for the magnetic tape subsystem through its error-checking circuitry.
Two controllers provide simultaneous tape reading and writing in a GE-235 system.
Two controllers available: one for low-densitv taoe: and one for high-densitv taoe.
T A P E HANDLER CONTROL AND INDICATOR PANEL
TAPE HANDLERS
Reads from and writes on tape a t 75 inches per second.
Two character densities a r e available:
1.
Low Density
-
200 characters per inch
(1 5,000 characters per second);
2. High Density
-
555.5 characters per inch (41,600 characters per second).
Millions of characters mav be recorded on a single r e e l of t a ~ e .