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Toshiba T-Series T1200 User manual

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1.1
GENERAL
Toshiba
Personal
Computer
T1200
(hereinafter
referred
to
as
T1200)
is
a
portable
personal
computer
which
is
compatible
with
IBM
PC
situated
at
higher
rank
of
portable
computer
than
Toshiba
TllOO
PLUS.
It
provides
many
powerful
functions
in
spite
of
its
compact
size
and
internal
battery
pack
which
is
removal.
Hardware
of
the
T1200,
most
of
IC
chips
are
C-MOS
type
so
that
the
power
consumption
is
very
little
and
Gate
Array
chips
are
applied
so
that
it
is
very
compact
and
light
weight.
The
Tl200
is
composed
of
as
follows:
System
PCB
(Printed
curcuit
board)
3.5-inch
floppy
disk
drive
3.5-inch
hard
disk
drive
LCD
(Liquid
crystal
display)
Keyboard
Intelligent
power
supply
PCB
Built-in
modem
FIGURE
1-1
T1200
Personal
Computer
1-1
A
3.5-inch
Floppy
disk
drive
(FOO)
is
double-sided,
double-density,
double-track
with
storage
capacity
of
720
kilobytes
(formatted).
A
3.5-inch
hard
disk
drive
(HOD)
with
storage
capacity
of
20
megabytes
is
an
equipment
of
the
former.
The
high-resolution
liquid
crystal
display
(LCD)
with
pixels
of
640
in
columns
and
200
in
rows.
The
keyboard
has
82
keys.
For
most
applications
it
can
be
used
exactly
like
a
standard
typewriter
keyboard.
Intelligent
power
supply
apart
from
those
ordinary
power
serving
functions,
this
unit
contains
a
so-called
"one-chip
microcomputer",
and
it
controls
the
whole
system
PCB, FOO,
HOD
and
HOC.
The
built-in
modem
expands
the
capabilities
of
your
system.
The
built-in
modem
enables
the
system
to
communicate
with
an
asynchronous
communications
device
through
a
telephone
line.
The
modem
can
operate
communications
at
either
low
(300
bps)
or
high
(1200
bps)
speed.
The
T1200
provided
connecting
to
the
optional
devices
at
the
rear
panel
of
the
system.
There
are
six
connectors
such
as
a
parallel
printer,
an
RGB
direct
drive
CRT
display,
an
external
FOO,
an
external
key
pad
and
an
RS-232C
device.
1-2
1.2
SYSTEM PCB
System
PCB
is
composed
of
the
following
devices:
o
Central
processor:
CPU
(80C86-2)
(9.54
MHz/4.77
MHz)
o
Numeric
data
processor:
NPU
(8087,
optional)
o Memory
System
memory
Expanded
memory
BIOS
ROM
Video
RAM
640
kbytes
384
kbytes
32
kbytes
16
kbytes
o
System
support
elements
Direct
memory
access:
DMA
(82C37)
Timer
:
(82C53)
Programmable
interrupt
controller:
PIC
(82C59)
o
Floppy
disk
controller:
FDC
(8565)
o
Keyboard
controller:
KBC
(80C49)
o
Acynchronous
communication
element:
ACE
(8570)
o
Gate
array
Bus
driver
Bus
controller
EXP-MEM
controller
Display
controller
1-3
1.2.1
Jumper
straps
The
system
PCB
has
five
jumper
straps~
PJ17,
PJ18,
PJ19,
PJ20,
and
PJ2l.
The
following
figure
shows
location
of
the
jumper
straps.
I
PJ21
PJ18 PJ19
--
PJ20
I11III
PJ17
-
FIGURE
1-2
Jumper
Straps
Location
1-4
The
following
table
shows
function
of
the
jumper
straps.
TABLE
1-1
Jumper
Strap
Functions
Jumper Pins Description
D
F/F
type
PJ17
1 2
F/H
type
PJ18
D 3 Normal.
PJ18 PJ19 1 2
PJ19
PJ18
1 G When connect an
ICE
to
the
co-processor socket.
PJ19D
D Noco-processor.
PJ20
1 2 When connect a co-processor
to
the
co-
processor socket.
D Display a normal
font.
PJ21
1 2 Displays a
North
Europian (Denmark)
font.
1-5
1.3
3.5-rRCB
PLOPPY
DISK
DRIVE
The
floppy
disk
drive
(FDD)
used
in
the
T1200
is
high
performance,
high
reliable,
slim
sized
FDD
for
3.5-inch
floppy
disks
with
recording
capacity
of
1
Mbyte
(unformatted)
in
double-sided,
double
density
and
135
tracks
per
inch
operation.
The
specifications
are
as
following
table.
FIGURE
1-3
3.5-inch
FDD
T~BLE
1-2
3.5-inch
Floppy
Disk
Drive
Specifications
Item Specifications
Storage Capacity (kilobytes)
1000
(unformatted)
720
(formatted)
Number
of
Heads 2
Number
of
Track perSide
80
Track
to
Track
Access
(milliseconds) 6
Head Settling Time (milliseconds)
1S
Track Density (tracks persecond)
135
Motor
Start-up Time (milliseconds)
500
Data Transfer Rate (kilobits per second)
250
Rotational
Speed
(revolutions per minute)
300
Recording
Method
MFM
(Modified
frequency
modulation)
1-6
1.4
HARD
DISK
DRIVE
The
hard
disk
drive
(HDD)
is
random
access
storage,
having
recording
capacity
of
20
Mbytes.
This
is
equipped
with
the
storage
media
of
non-removable
3.S-inch
magnetic
disks
and
mini-winchester
type
magnetic
heads.
The
specifications
are
as
following
table.
FIGURE
1-4
3.5-inch
Hard
Disk
Drive
TABLE
1-3
3.5-inch
Hard
Disk
Drive
Specifications
Item Specifications
Storage Capacity (megabytes) 25.3
(unformatted)
21.4
(formatted)
Number
of
Heads 2
Number
of
Track perSide 615
Access
Time (milliseconds) (minimum) 24
(average) 78
(maximum) 130
Data Transfer Rate (megabits per second) 7.5
Rotational Speed (revolutions per minute) 2597
Recording
Method
2-7
RLL
(Run
length
limited)
1-7
1.5
BARD
DISK
COR~OL
PCB
Hard
disk
control
PCB
(HOC)
is
accompanied
by
hard
disk
drive
(HOD)
and
connects
to
the
system
PCB
through
a
cable.
This
HOC
can
interface
the
HOD
to
the
system
PCB.
The
specifications
are
as
following
table.
FIGURE
1-5
Hard
Disk
Control
PCB
TABLE
1-4
Hard
Disk
Control
PCB
Specifications
Item
Specifications
Encoding method 2-7
RLL
(Run Length Limited)
Data Transfer Rate (megabits per second) maximum
7.S
Write
Precompensation
time
(nanoseconds)
12
Sectorina Soft
1-8
1.6
KEYBOARD
The
keyboard
is
mounted
on
the
system
and
has
82
keys.
These
consist
of
48
standard
keys,
10
function
keys,
10
cursor
keys,
13
functional
keypads,
and
Fn
key.
The
keyboard
is
just
a
key
matrix
built
up
by
the
above
keys.
The
keyboard
is
connected
to
the
keyboard
controller
on
the
system
PCB
through
a
22-pin
flat
cable.
FIGURE
1-6
Keyboard
1-9
1.7
LIQUID
CRYS~AL
DISPLAY
The
liquid
crystal
display
(LCD)
is
a
graphics
type
display
unit
which
has
a
resolution
of
640
in
horizontal
(or
column)
by
200
in
vertical
(or
row)
directions.
This
unit
is
composed
of
the
display
panel,
power
supply
and
driver
circuits.
This
receives
timing
pulses,
four-bit
data
signals,
+5V
dc
and
-22V
dc
power
inputs
and
a
contrast
control
input
from
the
system
PCB.
All
timing
pulses
and
data
signals
are
TTL
level
compatible.
Specifications
are
as
following
table.
FIGURE
1-7
Liquid
Crystal
Display
TABLE
1-5
Liquid
Crystal
Display
Spesifications
Item Specification
Outline
Dimension (mm) 275.0 (W) x 126.0 (H) x 15.8(D)
Number
of
Dots 640 x 200
dots
Number
of
characters
80
x
25
(2000) Characters
(8 x 8
dot
format,
alpha-numeric)
Clear Viewing Area (mm) 231.0 (W) x 105.0 (H)
Dot
Size
(mm) 0.32 (W)
,0.46
(H)
Dot
Pitch (mm) 0.35 (W)
,0.49
(H)
Weight
(gram) Max.
500
1-10