The TORCH Graduate User Guide Issue 1.00, Nov 1984 The ...

The TORCH Graduate User Guide Issue 1.00, Nov 1984
command line
- a distinctive form of the prompt which indicates
that the MS-DOS operating system is ready to receive
a typed-in command. The command line prompt will
look something like this:
A>.
compiler a specialised program converts a set of program
instructions from form which can be written by a
programmer - the source code - into a form which can
be read by the processor - the object code.
cursor the cursor can take the form of a "flashing" line
which appears directly beneath the point at which
the next character will appear. Anything typed in at
the keyboard will appear on the screen at the point
marked by the cursor.
data information which can be processed by a computer
program.
disable when switches or codes are "set" in such a way that a
device will not accept interrupt. See enable.
disc(disk) the primary medium n which information (both data and
programs) is stored. The Graduate uses 'floppy'
discs which have their surfaces covered with a thin
layer of magnetic material which holds the
information in a binary form.
disc drive(1) from a hardware point of view a disc drive is a
device that is used to read information from, and
write information to, a disc. A read/write head is
provided for each physical surface of the disc. The
drive rotates the disc at a constant speed and moves
the readjwrite heads in and out across the disc
surfaces in order to access any part of the disc.
The heads store information on the disc by
magnetising or demagnetising small pieces of the
disc's surface; each piece representing a bit. The
bits are read by detecting their magnetic influence
as they rotate past the drive heads.
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