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2.2.5 Cassette Tape Deck Control Keys
The four green keys above the number pad are called cassette tape deck control keys. See Figure
2.19.
[DDDDDDDDDD[
TAPE CONTROL
CURSOR KEYS
CB CD CTI CD
FIGURE 2.19 Location of Cassette Tape Deck Control
K~ys
These keys are connected directly to the cassette tape deck and perform a different role than the
other
keys.
t
The functions of these keys are as follows:
[ REW)
Rewinds the cassette tape.
~
Fast forwards the cassette tape.
[sToP)
Stops the cassette tape.
[EJEcT)
Ejects the cassette.
These functions have no relation to the mode in which the computer is operating.
Recording and reading data to/from the cassette tape are controlled by the software.
With BASIC SB-5510, recording or reading of program text is performed by the SAVE and LOAD
commands,
respectively.
Recording or reading of data files is performed by the PRINT/T and INPUT/
T statements, respectively.
Instructions for recording and reading are provided with all system software.
t
All other keys are scanned by the Z80-PIO and processed by the software (See Paragraph 4.3.3), but the cassette
tape deck control keys directly control the motor and eject mechanisms of the tape
deck.