TRS-SO
MODEL III
Z-80 Microprocessor
This is the central processing
unit-where
all
the'
'thinking" is done. In the Model
III, the microprocessor operates at a speed
of
over
two million cycles per second.
Read
Only Memory (ROM)
This is where the
Computer's
built-in programs are stored, including the
TRS-80
BASIC
language.
TRS-80
BASIC
is fully compatible with the Level II language used in
Model I
TRS-80'
s.
Each
time you power-on the Computer, this
ROM
program takes
charge
of
the microprocessor, enabling you to type in simple BASIC-language
instructions.
The
Model III contains a "14K"
ROM,
meaning it contains
14
*
1024
=
14336
characters
('
'bytes'
')
of
permanently programmed memory.
Random
Access Memory (RAM)
This is where yourprograms and results are stored while the Computeris on.
It
is
erased when you turn the Computeroff.
The
Model III can be equipped with
16K,
32K
or
48K
of
RAM
( I K = 1024 bytes).
Peripherals
These are devices
you
canadd to yourCoruputerto increase its usefulness in
programming and data storage.
The
Model III contains the necessary" interfaces',
to simplify the addition
of
many peripherals.
Cassette
For
long-term storage
of
programs and data, simply connect a cassette recorder to
the Computer, and save the information
on
tape.
For
programstorage, yournay select either High
or
Low
transferrates (use Low for
compatibility with
Model
I,
Highfor faster saves and loads).
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