Toshiba T2100 Series Bedienungsanleitung

T2100 Series

1-1

1.1 Features

The Toshiba T2100/T2105 Series computers are one of the lightest and most advanced

portable computers available. Utilizing advanced technology and high-speed components, the

computer offers excellent display legibility, battery operation and IBM PC/AT compatibility.

References to the T2100, T2100CS, and T2100CT models relate directly to the T2105,

T2105CS, and T2105CT models respectively.

The T2100/T2105 Series computer system units consist of the following features:

❑Microprocessor

The SL Enhanced Intel 486DX2-50 microprocessor operates at 50 MHz, 3.3 Volts.

❑Math coprocessor

The math coprocessor is stored in the i486DX2 microprocessor.

❑Cache memory

Eight (8) KB of cache memory is stored in the i486DX2 microprocessor.

❑Disk storage

The T2100 has an internal 260 MB HDD.

The T2100CS/T2100CT has an internal 350 MB HDD.

A 3.5-inch Floppy Disk Drive (FDD) supports 2 HD floppy disks (1.44 Mbytes) and

2DD floppy disks (720 Kbytes).

❑Memory

The T2100/T2100CS comes standard with 4 MB of CMOS Random Access Memory

(RAM), and the T2100CT comes with 8 MB RAM, 3.3 Volts. This includes 640 KB

of conventional memory with 3,264 KB of extended memory for the T2100/T2100CS

and 7,360 KB for the T2100CT, which can be utilized as expanded memory compat-

ible with the Lotus/Intel/Microsoft Expanded Memory Specifications (LIM-EMS).

❑Monochrome LCD (T2100)

A high-resolution, Liquid Crystal Display (LCD) displays 640x480 pixels with 64-level

gray scale. The T2100 internal display controller supports Video Graphics Adapter

(VGA) functions on the internal display device.

❑STN color LCD (T2100CS)

A high-resolution, Supertwist Nematic (STN) color Liquid Crystal Display (LCD)

displays 640x480 pixels with 256 colors. The T2100CS internal display controller

supports Video Graphics Array (VGA) and Super VGA (SVGA).

1-2

T2100 Series

❑TFT color LCD (T2100CT)

A high-resolution, Thin Film Transistor (TFT), full color LCD displays 640x480 pixels

with a maximum of 64k of colors. The T2100CT internal display controller supports

VGA and super SVGA.

❑Keyboard

An easy-to-use 82/84-key enhanced keyboard with full-size keys and standard spacing

is compatible with IBM standard software. The computer's keyboard supports soft-

ware that uses a 101- or 102-key enhanced keyboard.

❑Batteries

The T2100/T2105 Series has three different batteries: a main battery, a backup

battery, and a Real Time Clock (RTC) battery.

❑Personal Computer Memory Card International Association (PCMCIA) card slot

The T2100 Series computers have two PCMCIA slots which enable you to install an

MiNC Toshiba card modem or other industry-standard PCMCIA release 2.0 card.

The lower slot is 5.0 mm (Type II) or 10.5 mm (Type III). The upper slot is 5.0 mm

(Type II).

❑Parallel port

The Centronics-compatible parallel interface port supports the Enhanced Capability

Port (ECP) standard. The port can be used to connect a printer or other parallel

device.

❑RS-232-C port

The T2100/T2105 Series has one 9-pin serial interface port.

❑Keyboard port

The 6-pin keyboard port on the back can accommodate an IBM PS/2 keyboard.

❑Port replicator port

The port replicator port enables you to connect a port replicator to the computer. The

port replicator allows connection of a PS/2 mouse, parallel port, serial port, DC IN

socket, PS/2 keyboard, and external monitor.

❑External monitor port

The 15-pin external monitor port on the back can accommodate an external video

display.

T2100 Series

1-3

❑Memory module slot

The memory slot enables you to install an optional Toshiba memory module.

❑AccuPoint

The pointer control stick, located in the center of the keyboard, provides convenient

control of the cursor without requiring desk space for a mouse.

1-4

T2100 Series

The T2100/T2105 Series Personal Computer is shown in Figure 1-1, and its system configura-

tion is illustrated in Figure 1-2.

Figure 1-1 T2100/T2105 Series personal computer

T2100 Series

1-5

Figure 1-2 T2100/T2105 Series system unit configuration

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T2100 Series

1.2 System Unit Block Diagram

Figure 1-3 is a block diagram of the T2100/T2105 Series system unit.

Figure 1-3 T2100/T2105 Series system board block diagram

T2100 Series

1-7

The T2100/T2105 Series system board contains the following functional components:

❑One SL Enhanced Intel 486DX2-50 32-bit math coprocessor.

i486DX2 operates at 50 MHz and 3.3 volts.

❑Standard RAM

4 Mbytes, two 1024 x 16-bit chips (T2100/T2100CS)

8 Mbytes, four 1024 x 16-bit chips (T2100CT)

5 volt operation

No parity bit

Access time: 70 ns

Data transfer is 32-bit width.

❑Cache memory

Eight (8) Kbytes of cache memory are stored inside the i486DX2.

Four-way set-associative method.

❑BIOS ROM (Flash EEPROM)

128 Kbytes (one 128Kx8-bit chip) of memory.

64 Kbytes are used for the system BIOS.

40 Kbytes are used for the VGA BIOS.

24 Kbytes are reserved.

Access time: 150 ns.

Data transfer is 8-bit width.

❑Video Ram

512 Kbytes (T2100).

1 Mbyte (T2100CS/T2100CT).

5 volt operation.

Access time: 70 ns.

❑Optional memory

One expansion memory slot is available for 4, 8, 16 and 24 Mbyte memory

modules.

Total maximum memory size is 28 Mbytes for the T2100/T2100CS and 32

Mbytes for the T2100CT (if a 24 Mbyte module card is installed.)

3.3 volt operation

No parity bit

Access time: 70 ns

1-8

T2100 Series

❑A Super Integration (SI) Gate Array incorporates the following components:

- Two DMACs 8237

- Two PICs 8259 equivalent

- Two SIOs 16450 equivalent (One SIO is not used.)

- One PIT 8254 equivalent

- One FDC TC8565 equivalent

- One VFO TC8568 equivalent

- One I/O port decode

- One SIO port control

- One printer port control

- One FDD control

- One speaker control

- One power communication control

❑System Controller Gate Array (SYSCNT-GA)

This gate array has the following functions:

Memory control

DRAM control

CPU control

Bus control Compatible bus interface control

Compatible bus access control

DMAC control

I/O control

Address latch control

Address transfer

Address latch

DMA address generation

Refresh address generation

I/O register control

Compatible I/O port

Special register

Processing speed control

Data bus transfer (32-bit to 16-bit) control

Data latch

❑PCMCIA Controller Gate Array

PCMCIA (ToPIC) control

❑Video Controller Gate Array

The T2100/T2105 Series internal display controller (C&T65540) (3.3/5 volts

operation) controls the internal VGA display and external SVGA compatible

display.

T2100 Series

1-9

❑Keyboard Controller (KBC)

One M38802 chip is used.

The KBC, which includes the keyboard scan controller and keyboard interface

controller, controls the internal keyboard, external keyboard port, and PS/2

mouse port.

❑Real Time Clock (RTC)

A T9934 chip with 128 bytes of memory is used. Fourteen bytes of memory

are used for the calendar and clock, and the remaining 114 bytes are used for

system configuration data.

❑IO-CNT GA

This gate array has the following functions:

System interface

Hot key control (KBC interface)

PS interface

BIOS ROM interface

NEXUS GA function

❑AccuPoint Controller (U43SC11X)

This controller emulates the AccuPoint signals to the PS/2 mouse on the port

replicator signal, and sends them to the KBC.

1-10

T2100 Series

1.3 3.5-inch Floppy Disk Drive

The T2100/T2105 Series 3.5-inch Floppy Disk Drive (FDD) is a thin, high-performance

reliable drive that supports 720 KB (formatted) 2DD and 1.44 MB (formatted) 2HD 3.5-inch

floppy disks.

The FDD is shown in Figure 1-4, and its specifications are listed in Table 1-1.

Figure 1-4 3.5-inch FDD

Table 1-1 3.5-inch FDD specifications

Item 2 MB mode 1 MB mode

Storage capacity (KB)

Unformatted 2,000 1,000

Formatted 1,311 737

Number of heads 2 2

Number of cylinders 80 80

Access time (ms)

Track to track 3 3

Average 181 181

Head settling time 15 15

Recording track density (tpi) 135 135

Data transfer rate (Kbps) 500 250

Rotation speed (rpm) 300 300

Recording method Modified Frequency Modulation (MFM)

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