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Toshiba T-Series T8500 User manual

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File
No.
960-012
1.1
GENERAL
Toshiba
T8500
is
one
of
the
most
powerful
personal
computers
available,
offering
high
technology,
high
speed
and
full
IBM
PC
AT
compatibility.
This
system
unit
is
composed
of
Main
Board,
3.5-inch
floppy
disk
drive
(FOO)
,
3.5-inch
hard
disk
drive
(HOD)
and
power
supply
unit.
The
system
unit
has
6
connectors
(labeled
EX-FOO, PRT, SCSI,
RGB,
SERIAL1,
and
SERIAL2),
keyboard
socket,
3
IBM
PC
AT
compatible
slots,
and
1
slot
compatible
with
Toshiba
size
optional
card.
The
central
processing
unit
(CPU)
is
the
32-bit
80386-20/25
microprocessor.
The
standard
memory
has
a
capacity
of
2
Mbytes;
1
Mbyte
is
on
the
main
board
and
1
Mbyte
is
standard
memory
board.
32
Kbytes
(80386-20)
or
64
Kbytes
(80386-25)
of
cache
memory
speeds
up
the
T8500
processing.
The
HOD
has
a
capacity
of
100
Mbytes.
The
FOO
can
support
200
(720
Kbytes)
and
2HO
(1.44
Mbytes)
floppy
disks.
The
auto-sensing
universal
power
supply
is
used
worldwide,
and
has
one
AC-OUT
socket
for
supplying
power
to
your
display.
Figure
1-1
T8500
personal
computer
1-1
File
No.
960-012
1.2
SYSTEM
UNIT
The
configuration
of
the
system
unit
is
shown
in
Figure
1-2.
SERIAL
SCSI
Devices Device
bisplay EX-
FDD
PRT
r·_·_·_·
._._._._.-
-~-.-.-.~.-.-.~.-.-.-.-.-
_._._._._._._._._._._._._._._._._._.,
PJ13 PJ14
Connector
Board
I
PJ1S
PJ16
Main
Board
PJ2 PJ10 PJ7 PJ8 PJ6
I
Lithium
Battery
I
Speaker
Board
: ....................
-:
~
Internal
~
~
SCSI
Device
~
~
....................
.:
PS
I
Cooling
Fan
PJS
1
FDD
PJ11
PJ3
PJ4
PJ1
PJ9
I
HDD
I
Option
HDD
....................
13100
Option
f--
Support
~
Board Card
....................
....................
PC-Bus
IBM
PC
AT
f--
Mother
~
Compatible
Board Board
....................
10-
Memory
Board
System
Unit
L._._._._._._._._._._._._.
__
._._._._._._._._._._._._._._._._._._._._._._._._._._.-.-.-.-.~
IKeyboard
Figure
1-2
System
unit
configuration
1-2
)
File
No.
960-012
The
key
features
of
the
system
unit
are;
o 1
main
board.
o 1
memory
board.
o 1
speaker
board.
o 1
T3100
support
board.
o 1
PC-bus
mother
board
having
three
IBM
PC
AT
bus
slots
and
1
IBM
PC/XT
bus
slot.
o 1
internal
3.5-inch
FDD
supporting
two
media
types;
-
2HD
(double-side,
high-density,
double-track)
-
2DD
(double-side,
double-density,
double-track)
The
2HD
and
2DD
floppy
disks
can
be
formatted
with
1.44
Mbytes
and
720
Kbytes
of
storage
capacity,
respectively.
o 1
internal
3.5-inch
100-Mbyte
HDD.
o 1
auto-~ensing
universal
power
supply
that
can
be
used
worldwide
provides
+5
VDC,
-5
VDC,
+12
VDC
and
-12
VDC
to
all
the
components
on
the
system
unit,
including
optional
IBM
PC
compatible
boards
and
Toshiba
size
optional
card.
o 1
parallel
printer,
external
FDD,
SCSI,
RGB,
two
serial
device
connectors
are
located
at
the
rear
panel
of
the
system
unit.
1
keyboard
socket
is
located
at
the
front
panel
of
the
system
unit.
1-3
I"J]
1-'-
I"J]
....
....
1-'-
.
CD
I"J]
1-'-
'§
11
CD
CPU
System
RAM
HOC
80386
2MB
,
...
,h
••
[J
II
lJ
I I
;--
1 ]
;--
II
(
C031
-00
B031
-00 SOl5 -00 )
(,
lJ
I I J
11
II
n
I.Q
W
s::
Z
11
0
CD
~
....
H I.D
'HIlI I
r.s
0"1
IN
0
i I
(I)
0
~
....
0
I\)
(
(I)
rt
....
I
IN
Il'
I-'
0
0
~
....
a.
I
1-'-
.to
IV
IQ
11
IV
:3
<
CA31
-02 BA31,31,BA23 -00
SA23
-00 )
lJ lJ
[1
-
~
I
lJ
---
LJ
LJ
CACHE
SA
GA
SI I J
lID
Ii
8 8
..J
LJl
CACCNT
---
8 ,
T9490F
OWAOR2
,
T4758A
..
, ,
CACHE
I I i !!
..
IIJC8
F=
"
ii
T9490F
~
U
8fc:
VSS
1
1'-.:-""11
SA
8
SA
8
SYSTEM
-'
t--------of " , , -r--.
BIOS
:
~=--=,J
!
CCNT
i
BCNT
i
BIOS
~
II
L
________
.JI
III
p-
CD
tr
....
0
0
~
a.
1-'-
IV
I.Q
11
IV
a
0
HI
0 (
SA09
-
DO
H!
:3
IV
1-'-
~
tr
0
IV
11
a.
II
U
IIU~
~
<.
XUL
I -
DO
L--.-.J
U U J U o !
IJ
0
PYGAl
SI SIO
KBC
RTC
SPC
~:r.p
T9761
TC8670 8742
111'41'"
..
-
000
a a
1..11.
•.
1 0 0
AD
"'"
11011
II
DIIPLAY
ICII
rt
~
CD
a
IV
1-'-
~
tr
0
IV
11
a.
.
../
--
Main
0
0
0
0
0
0
File
No.
960-012
board
is
composed
of
the
following
components:
Central
processing
unit
(CPU)
80386-20
or
80386-25:
The
CPU
is
a
32-bit
microprocessor
operated
at
20
MHz
or
25
MHz
clock
speed."
Numeric
data
processor
(NPX)
socket
for
the
80387-20
or
80387-25
and
WE3167.
Real
time
clock
(RTC)
MC146818:
The
RTC
continuously
keeps
the
data
and
time
backed
up
by
a
lithium
battery.
Serial
input
output
(510)
TC8570:
The
510
controls
the
RS-232-C
port.
Keyboard
controller
(KBC)
(8742):
The
KBC
controls
the
serial
data
from
the
IBM
PC
AT
compatible
keyboard.
Cache
controller
T9490F:
The
cache
controller
T9490F
improves
memory
access
operation
dramatically
with
its
32
Kbytes
high-speed
cache
memory.
This
controller
includes
the
cache
memory
32
Kbytes.
o
Memories:
-
System
random
access
memory
(RAM) 2
Mbytes;
1Mbyte
is
on
the
memory
board.
-
System
basic
input/output
read
only
memory
(System
BIOS
ROM)
64
Kbytes
-
Video
graphics
subsystem
(VGS)
BIOS
ROM
32
Kbytes
-
Video
RAM (VRAM)
256
Kbytes
(64
Kbyte
X 4)
o
Small
computer
system
interface
(SCSI)
protocol
controller
(SPC)
MB89352:
The
SPC
supports
the
standard
SCSI
by
the
software.
o
Super
integration
(51)
T4758A
and
T9761:
The
T4758A
includes
2
direct
memory
access
controller
(DMACs,
equivalent
to
82C37),
2
programmable
interrupt
controller
(PICs,
equivalent
to
82C59)
and
1
programmable
interval
timer
(PIT,
equivalent
to
82C54).
The
T9761
includes
the
floppy
disk
controller
(FDC,
equivalent
to
TC8565),
programmable
interval
timer
(PIT,
equivalent
to
82C54)
and
serial
input
output
(510,
equivalent
to
TC8570).
o
Paradise
video
graphics
array
(PVGA1)
The
PVGA1
has
the
following
display
control
modes.
-
Video
graphics
array
(VGA)
mode
-
Enhanced
graphics
adapter
(EGA)
mode
-
Color/graphics
adapter
(CGA)
mode
-
Monochrome
display
adapter
(MDA)
mode
o
Gate
arrays:
Gate
arrays
are
used
on
the
main
board
as
follows.
-
Bus
controller
gate
array
GA-BCNT
(100-pin)
-
Controller
gate
array
GA-CCNT
(100-pin)
-
Address
gate
array
GA-OWADR2
(100-pin)
-
Cache
controller
gate
array
GA-CACCNT
(62-pin)
1-5
File
No.
960-012
1.4
MEMORY
BOARD
The
memory
board
has
1
Mbyte
RAM
and
three
expansion
slots
(IS1,
IS2,
and
IS3)
for
the
single
in-line
memory
module
(SIMM).
This
SIMM
is
provided
three
types,
2
Mbytes,
4
Mbytes,
and
8
Mbytes.
The
SIMM
combination
is
shown
in
Table
1-1.
IS1
-
2
Mbytes
2
Mbytes
2
Mbytes
2
Mbytes
2
Mbytes
2
Mbytes
2
Mbytes
2
Mbvtes
Figure
1-4
Memory
board
Table
1-1
SIMM
combination
Slots
IS2
IS3
To~al
- -
--
2
Mbytes
-
2
Mbytes
2
Mbytes
4
Mbytes
-
4
Mbytes
4
Mbytes
8
Mbytes
-
8
Mbytes
2
Mbytes
8
Mbvtes
4
..
~
m~mory
caJ:Laci
ty
2
Mbytes
4
Mbytes
6
Mbytes
8
Mbytes
8
Mbytes
12
Mbytes
12
Mbytes
14
Mbytes
16
Mbvtes
NOTE:
The
4
Mbytes
and
8
Mbytes
of
SIMM
will
be
sold
in
future.
1-6
File
No.
960-012
1
.5
SPEAKER BOARD
The
speaker
board
has
one
speaker,
two
LEOs
and
one
key
switch
connector.
One
LED
is
lit
green
at
power
on:
Its
colors
(green
and
red)
vary
with
clock
speed
(high
and
low)
of
cpu.
The
other
LED
is
lit
red
when
the
HOD
is
in
operation.
Figure
1-5
Speaker
board
1-7
File
No.
960-012
1.6
PC-BOS
MOTHER
BOARD
PC-bus
mother
board
relays
the
buses
of
extension
boards
for
IBM PC
AT
or
PC/XT.
This
board
has
three
PC
AT
slots
and
one
PC/XT
slot.
Figure
1-6
PC-bus
mother
board
1-8
File
No.
960-012
1.7
T3100
SUPPPRT
BOARD
The
T3100
support
board
relays
the
bus
of
an
option
card
for
T3100.
This
board
has
the
connectors
with
16
bits
for
T3100-
compatible
data
and
16
Mbytes
for
memory
address
space.
Figure
1-7
T3100
support
board
1-9
File
No.
960-012
1.8
3.S-IHCH
FLOPPY
DIS,
DRrvE
The
3.5-inch
internal
FDD
is
a
high-performance,
reliable
and
thin
drive
that
suppo~ts
720-Kbyte
(formatted)
2DD
3.5-
inch
floppy
disk,
and
1.44-Mbyte
(formatted)
2HD
3.5-inch
floppy
disk.
The
FDD
is
illustrated
in
Figure
1-8,
and
its
specifications
are
listed
in
Table
1-2.
Figure
1-8
3.5-inch
FDD
1-10
\