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TANDY COMPUTER PRODUCTS
INTRODUCTION
TO
THE TANDY 1000
HX
COMPUTER
The Tandy 1000
HX
Computer
is
modular
in
design
to
allow
maximum flexibility
in
system configuration. The computer
consists
of a
Main Unit, and
a
monitor. The Main Unit
is
supplied with one
3
1/2" internal disk drive.
A
second
internal
3
1/2" disk drive
is
optional. Each disk drive
has
a capacity
of
720K bytes formatted. The standard types
of
monitors used with the Tandy 1000
HX
are the monochrome
composite and the color RGB monitor.
The Tandy 1000
HX
has
a
standard 256K
of
system RAM.
An
optional DMA/RAM board allows the Tandy 1000
HX to be
expanded
by
128K
or
384K
of
RAM. This board will fit onto
the expansion slot. With
a
fully populated RAM board
installed, the Tandy 1000
HX
will have 640K bytes
of
RAM
allowed
by
the system memory map.
Other features include
a
parallel printer port, two built-in
joystick interfaces, and
a
headphone connection for private
listening.
The Main Unit
is
the heart
of
the Tandy 1000 HX.
It
houses
the Main Logic Assembly, system power supply,
internal
3
1/2" disk drive, and keyboard.
The Main Logic Assembly
is a
large board mounted
to
the
bottom of the Main Unit and interconnected
to
the keyboard,
power supply, and disk drive
by a
series
of
cables. Figure
1
shows the Tandy 1000
HX.
The Power Supply
is a
28W switching regulator type, designed
to provide adequate power capacity for
a
fully configured
system.
The Internal
3
1/2" Disk Drive uses double-sided,
double-density diskettes
to
read, write,
or
store data.
These are soft sector diskettes. The Disk Drive assembly
is
installed
in
the standard unit. All system programs, with
the exception
of
the system startup sequence, are stored
on
disk.
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