System Unit - IBM Personal Computer XT Manual To Operations

System Unit
The main component of your IBM Personal Computer
XT is the system unit. It accomplishes all the
processing and controlling operations for your system
through a set of instructions called a program. The
IBM Personal Computer XT comes with a program
languaged, IBM BASIC, already installed and many
programs are written in that language. However, you
can also write programs for your IBM Personal
Computer XT in several other IBM supported
programming languages. Although a reference manual
for IBM BASIC is included with your system unit, prior
knowledge of general programming concepts will be
very helpful in writing programs for your IBM Personal
Computer XT. In addition, various program packages
are available at your authorized IBM Personal
Computer dealer to help you meet a variety of business
and personal needs.
The system unit stores data on either the fixed disk
drive or the diskette drive using an operating system
such as the IBM Disk Operating System (DOS). IBM
DOS allows the system unit to store and retrieve data
from either the fixed disk drive or the diskette drive.
The reference manuals Disk Operating System and
BASIC describe the commands needed to store or
retrieve data. If you choose to write your own
operating system, the IBM Personal Computer XT
Technical Reference manual
will
provide valuable
information.
System Unit 3-3