Toshiba T-Series T3200 User manual

1.1 GENERAL
Toshiba Personal Computer T3200 (hereinafter referred to as
T3200) is a portable personal computer which is compatible with
IBM PC/AT si tuated at higher rank of portable computer than
Toshiba T3l00. Hardware of the T3200, a lot 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 T3200 is composed of as follows:
System PCB (Printed curcuit board)
Hard disk control PCB
3.5-inch floppy disk drive
3.5-inch hard disk drive
Plasma display
Keyboard
Power supply unit
FIGURE 1-1 T3200 Personal Computer
1-1

A 3.5-inch Floppy disk drive (FDD) is double-sided,
double-density, double-track with storage capacity of 720
kilobytes (formatted). A 3.5-inch hard disk drive (HDD) with
storage capacity of 40 megabytes (formatted) is the second
external storage device. The plasma display with pixels of 720
in columns and 400 in rows.
The keyboard has 85 keys. For most applications it can be used
exactly like a standard typewriter keyboard.
The power supply unit provides +5 Vdc and +12 Vdc power to every
component in the system unit, including the option cards. For
the plasma display, this unit regulates +205 Vdc power. This
unit has a ventilation fan, driven by +12 Vdc. The fan enhances
the reliability and durability of the T3200 system unit.
The T3200 provided connecting to the optional devices at the
rear panel of the system. There are three connectors such as a
parallel printer (or an external floppy disk drive), an RGB
direct drive CRT display and an RS-232C device.
The connector for a parallel printer can be used to connect an
external FDD unit by changing the A-B-PRT switch setting.
1-2

1.2 SYSTEM PCB
System PCB is composed of the following devices:
o Central processor: CPU (80286-12) (12 MHz/6 MHz»
o Numeric data processor: NPU (80287, optional)
o Memory
RAM
ROM (Main BIOS) .... .
(AGS BIOS) ..... .
Video RAM ..........•
1 Mbyte standard
3 Mbytes (option card)
--- "LIM" standard
64 Kbytes (16 bits)
32 Kbytes (8 bits)
256 Kbytes
o System suP?ort elements
Direct memory access: DMA (82C37)
Programmable interrupt controller: PIC (82C59)
Programmable interval timer: PIT (82C54)
Real time clock: RTC (MC1468l8)
o Floppy disk controller: FDC (TC8565F)
o Keyboard controller: KBC (u8042) x 2
o
Display controller: PEGA2, AGS G.A.
o Gate array
Bus driver
Memory mapper
DMA driver
I/O controller
LIM
AGS (Advanced graphics subsystem)
1-3

1.2.1 DIP switches
The system has DIP switches which are located at the rear panel.
The following table shows function of the DIP switches.
TABLE 1-1 DIP Switch Functions
DIP
Setting Description
Switch
ON Auto-Switched display mode
1
OFF
IBM EGA full compatible
ON
PRT port used both for input and output
2
OFF
PRT port only for output
ON
Communications port as CH2
3
OFF
Communications port as CH 1
ON Double font in plasma for TEXT
4
OFF Single font in plasma for TEXT
ON Disable CRTC for EXT.CRTC
5
OFF Enable internal CRTC (normal)
ON North European Font to display
6
OFF Other Fonts (Normal)
7to 10
(Defined as follows)
Monitor in use 7 8 9 10
Monochrome OFF OFF OFF OFF
Standard RGB
(40 column mode is default)
ON OFF
OFF ON
Standard RGB
(80 column mode is default)
OFF OFF OFF ON
Enhanced RGB
(200 line or emulation of standard RGB is
ON ON ON
OFF
default)
Enhanced RGB
(350 line, true enhanced operation is default)
OFF ON ON
OFF
1-4

1.2.2 Jumper straps
The system has six jumper straps (PJ 2) which are located on the
keyboard control PCB.
Usually the six jumper straps are all open.
The following figure shows location of the jumper straps.
MiwtfU PJ 2
I I
FIGURE 1-2 Jumper Strap Locations
The following table shows function of the jumper straps.
TABLE 1-2 Jumper Strap Functions
Name Function
1-2
Not used
3-4 2HD
FDD type Open ... 1.6 Mbytes
Short ... 2.0 Mbytes
5-6
Internal FDD numbers
Open ...
OneFDD
Short ...
Two FDD/s
7-8
FDD type Open ... 2DD
Short ... 2HD (1.6 Mbytes/2.0 Mbytes)
9-10 Standard
memory size Open ... 640 kbytes
Short ... 512 kbytes
11-12 Used
3M B memory card Open ... Used
as the extended memory and
mode (Option) the expanded memory.
Short ... Used as the only expanded
memory.
1-5

1.3 3.5-INCB FLOPPY DISK DRIVE
The floppy disk drive (FDD) used in the T3200 is high
performance, high reliable, slim sized FDD for 3.5-inch floppy
disks with recording capacity of 720 kbytes (formatted) in
double-sided, double density and 135 tracks per inch operation.
The specifications are as following table.
FIGURE 1-3 3.5-inch FDD
TABLE 1-3 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) 3
Head Settling Time (milliseconds)
15
Track Density (tracks per inch)
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 3.5-IRCH HARD DISK DRIVE
The hard disk drive (HDD) is random access storage, having
recording capacity of 40 Mbytes (formatted). This is equipped
with the storage media of non-removable 3.5-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 1-4 3.5-inch Hard Disk Drive Specifications
Item Specifications
Storage Capacity (megabytes) 51.24
(unformatted)
40.30 (formatted)
Number of Heads 8
Number of Cylinders 615
Number
of Tracks (tracks per cylinder) 8
Access Time (milliseconds)
(minimum)
8
(average) 38
(maximum) 85
Recording Density (bits per inch) 14845
Track Density (tracks per inch) 834
Rotational Speed (revolutions per minute)
3600
Recording Method
MFM (Modefied Frequency
Modulation)
1-7

1.5 HARD DISK CONTROL 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 HDD to the system PCB.
The specifications are as following table.
FIGURE 1-5 Hard Disk Control PCB
TABLE 1-5 Hard Disk Control PCB Specifications
Item Specifications
Encoding method
MFM (Modefied Frequency
Modulation)
Data Transfer Rate (megabits per second) maximum
5
Write Precompensation time (nanoseconds)
12
Sectoring
Soft
1-8

1.5.1 Jumper straps
The Hard disk control PCB has jumper straps which are PJ 3, PJ 4
and PJ 5.
Functions of the jumper straps are as follows.
(1) PJ 3
Not used.
(2) PJ 4
This jumper straps select recording method of the hard
disk control PCB.
The following table shows function.
TABLE 1-6 PJ 4 Jumper Strap Functions
No. Status Function
1-2 Short
MFM method
3-4 Open
( 3) PJ 5
This jumper straps select the delay time of the hard
disk control PCB.
Usually delay time is selected as 20 ns.
The following table shows function of the jumper
straps.
TABLE 1-7 PJ 5 Jumper Strap Functions
No. Delay
time select
1-2 10
ns
3-4
15 ns
5-6
20 ns
7-8 25
ns
9-10
30 ns
1-9

1 .6 KEYBOARD
The keyboard is mounted on the system and has 85 keys. These
consist of 54 standard keys, 10 function keys, 17 cursor keys,
14 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
1-10