Heathkit H9 - Introduction

INTRODUCTION
The Heathkit Model
H9 Video Terminal
can display
information coming from a digital computer
or
in-
formation typed in from the
keyboard. This informa-
tion
is
displayed orta
L2"
(diagonal)
cathode
ray
tube
(CRT)
that is capable of displaying 960 characters at
one time
(12
rows with 80
characters
per
row).
A 67-key ASCII keyboard,
which
permits you
to com-
pose
and
edit directly on
the
CRT,
has
a capability of
64
different characters and
zq
different functions.
This message or
program
can be transmitted through
the standard
serial
I/O interface
(EIA,
TTL,
or
20
mA
current
loop)
to a digital
computer or through the
parallel
I/O interface to a
paper
tape reader/punch.
The Video Terminal
can be used with any digital
computer
in
a dedicated format, in a stand-alone ap-
plication,
or in a time-sharing system. It lets
you
communicate
with
a digital computer
in higher-level
language
(Basic,
Assembler,
etc,)
rather
than
just
using toggle switches.
The Video Terminal
is
also
much
faster
(up
to
9600
baud) than
the standard
electro-mechanical teletypewriter systems. You
can
select any data
rate between
110 and
g0OO
baud.
Other important features
include:
.
Automatic
scrolling
.
Cursor controls
.
Erase to
end of
line
o
Erase
page
o
Short form
(four
12-line
columns of
zO
characters)
o
Automatic
line carryover
.
Plot mode
o
Built-in
speaker
(audible
bell)
o
Transmit page
These features,
along with
the
attractively-styled
cabinet,
make
the Video Terminal
a versatile
peripheral
for
your
computer
system.