What The Disk Basic Is - Sharp MZ-700 Basic Manual

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What the DISK BASIC is
The DISK BASIC has a strong file control function relative to the cassette base
. BASIC. For example, it makes the most of the features of a disk base which has
high-speed read-outlwrite-in capabilities, and, more than simply serving for data
storage, the file makes it possible to use the data area directly connected to the
computer system.
Moreover, because this DISK BASIC also includes the control functions related to the
RS-232C interface, it makes it possible to control various devices, by using the
MZ-SBI03 serial interface (optional).
Thus, it can be said that the DISK BASIC is a new system software which permits the
expansion of the software range of the personal computer.
By understanding this DISK BASIC and making full use of its many functions, the
user can create a higher level system.
• File
The computer can exchange data and programs between peripheral devices (floppy
disk, cassette recorder, printer, etc.). The units of these data and programs are called
files.
• File cl.ssificatlon
There are two types of files: data files and program files.
1
Data files ..... These files store numbers, characters, etc. as data.
(
BASIC sequential access data files ..... BSD)
Files
BASIC random access data files ..... BRD
Program files ..... These files store programs just as they are.
(
BASIC text programs ..... BTX )
Machine language programs ..... OBJ
Computer systems can be thought of as either of two fundamental types of systems:
logical internal systems composed of data-processing equipment and main memories,
and external filing systems composed of processed data and program banks.