Specifications
The
TRS-80
Model
I Microcomputer
System
Radjo
SlrackS
TBS-80 Microcomputer
System
is tuIly wired,
t6ted
and U
L
Iisted
for electical
safety
-you
can
put
it to
work immediatelyl
lt's ideal
for
finances,
education,
accounting,
lab use
-even
for home entertainment'
And
it's the computer
with a
full line
of accessorles
being delivered
nov4 with
more
to come
in the
future!
Basrc
TRS-80
syst ems
include
a 12"
video
monitor, Rea.lj-stic
battery/Ac
cas-
sette
recorder,
power
s:|Jpply,
wer's
manual
and a
cassette
tape
for
playtng
Blackjack
and B ackg
anmon.
The TRS-80
comes
to
you
ready
to be
programmed
either
from
prerecorded
cassette
tape
or
from the
keyboard.
A
"program" is simply a
set of step-by-
step
instructions
telling
your
TRS-80
what
you
want
it to
do.
The TRS-80's
programs are vvritten
in easy-to-1earn,
plain-English
BASIC
programming
lorgu^g"
(BASIC
stands
for
"Beginner s
Atl-purpose
Synbolic
h)struction
Coae").
fne rcvet
I userb
manuaj
in cludes
a beginner's
cou6e
in
BASIC
that'L1
have
you
"talking"
to
yow
computer
in no
time
New
Lower
Prices!
TRS-80
Modet
I
Sy8teln8
Now
Losn
As
$499
Leuel I 4R
Inside the
keyboard
is
the computer's
"brain,"
A
powerful
Z-80
microprocessor
serves
as the central
processing
unit
(CPU).
Programs
and
data
are stored
in
internal
"memory
chips."
Our lowest-priced
TRS-80
computer
contains
4096 bytes
(4K)
of
user memory
or RAM
(a
byte being
rougNy
equivalent to
one
typewritten character
and
rnade up of eight
electrical
signals
called
"bits").
It can be
expanded
to 16K
within the
keyboard unit
and to 48K by
using the Expansion
Interface
with additional
memory
optrons.
And
noq every
new 16K TRS-80
includes a calculator-style
numeric
keypad
(available
as
an option on
4K computers).
Note: the
Z-80 is an
8-bit micro-
processor
and can
address a
total
of 64K
of
memory Both ROM
and
RAM are addressed
in the TRS-
80, along
with some internal
"overhead." In a
48K RAM
config:wation,
the
last memory
address
is 65,535
-
the usual
ending address
for a
64K
compurer.
The
"Read-Only Memory"
chips
contain
the
"BASIC interpreter"
software.
The interpreter
ac-
at,t-!-b