Toshiba T2150 series Manual de usuario

T2150 Series

1-1

1.1 Features

The Toshiba T2150 series Personal Computer uses extensive Large Scale Integration (LSI),

and Complementary Metal-Oxide Semiconductor (CMOS) technology to provide minimum

size and weight, low power usage, and high reliability. The T2150 series incorporates the

following features and benefits:

❑Microprocessor

The Intel DX4-75 microprocessor operates at 75 MHz and 3.3 Volts.

❑Math co-processor

The math co-processor is stored in the DX4 microprocessor.

❑Cache memory

The 16 KB cache memory is stored in the DX4 microprocessor.

❑Disk storage

The T2150 series has an internal 260 million bytes (250 MB) (TEG only) HDD and

520 million bytes (500 MB) HDD.

An external 3.5-inch Floppy Disk Drive (FDD) supports 2HD (1.44 Mbytes) floppy

disks and 2DD floppy disks (720 Kbytes) floppy disks.

❑CD-ROM Drive

The internal CD-ROM drive is full-size and double-speed. This drive can run 12cm or

8cm disks without an adapter, and supports the following formats: Audio CD, Photo

CD, and ISO 9660 formats.

❑Memory

Standard memory includes 4 MB of CMOS RAM and comes with 8MB. This in-

cludes 640 KB of conventional memory with 3264 KB of extended memory for the

T2150CDS and 7360 KB for the T2150CDT, which can be utilized as expanded

memory compatible with the Lotus/Intel/Microsoft Expanded Memory Specification

(LIM-EMS).

❑Display

The T2150CDS has a 10.4" full-color, Supertwist Nematic (STN) LCD with 640x480

pixels.

The T2150CDT has a 10.4" full-color, Thin-Film Transistor (TFT) LCD with

640x480 pixels.

The T2150 series internal display controller supports Video Graphics Array (VGA)

for internal display and Super VGA (SVGA) for external display.

1-2

T2150 Series

❑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 T2150 series has three different batteries: a main battery, a backup battery, and a

Real Time Clock (RTC) battery.

❑Expansion Memory Slot

An optional 4, 8, 16, or 24 MB memory module can be installed in the memory slot.

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

The PC card slot supports up to two Personal Computer Memory Card International

Association (PCMCIA) standard version release 2.0 cards. The upper and lower slots

can each accommodate one Type II (5.0mm) card. The lower slot can accommodate

one Type III (10.5mm) card when the upper slot is empty.

❑Parallel port

The Centronics compatible parallel interface port can be used to connect a Centronics

compatible printer or other parallel device. The port has ECP (Enhanced Capabilities

Port) conforming to IEEE•P1284.

❑RS-232-C port

The T2150 series has one 9-pin serial interface port.

❑External Keyboard port

The PS/2 type keyboard interface connector connects with a PS/2 compatible key-

board.

❑Port replicator port

The port replicator port enables connection of a port replicator. The port replicator

enables connections to the following ports: PS/2 mouse, PS/2 keyboard, parallel port,

serial port, DC IN socket, joystick/MIDI port, audio line-in, audio line-out, headphone

jack with volume control dial, external FDD, and external monitor.

❑External monitor port

One 15-pin RGB port on the back can be connected to an external video display.

T2150 Series

1-3

❑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.

❑Sound System

The Sound Blaster™ Pro™ compatible sound system gives multimedia capability

with a built-in microphone and speaker. The sound system provides a volume control

dial and jacks to connect external audio devices: headphone, microphone, and audio

line-in.

The T2150 series Personal Computer is shown in figure 1-1.

Figure 1-1 T2150 series personal computer

1-4

T2150 Series

1.2 System Unit Block Diagram

Figure 1-2 is a block diagram of the T2150 series system unit.

Figure 1-2 T2150 series system board block diagram

T2150 Series

1-5

The T2150 series system board has the following functional components:

❑One Intel DX4-75 32-bit microprocessor.

Intel DX4 operates at 75 MHz and 3.3 volts.

❑Standard RAM

4 Mbytes, two 1024x16-bit chips with no parity bit. (T2150CDS)

8 Mbytes, four 1024x16-bit chips with no parity bit. (T2150CDT)

5-volt operation.

Available high speed page mode access.

Access time 70 ns.

Data transfer is 32-bit width.

❑Cache memory

The 16 Kbytes of cache memory is stored inside the DX4 processor.

Four-way set-associative method.

❑BIOS ROM (Flash EEPROM)

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

64 Kbytes in the ROM are used for system BIOS.

40 Kbytes in the ROM are used for VGA BIOS.

24 Kbytes in the ROM are reserved.

Access time 150 ns.

Data transfer is 8-bit width.

❑Video RAM

1 Mbyte, two 256Kx16-bit chips.

5-volt operation.

Access time 70 ns.

❑Optional memory

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

memory modules, which consist of 1024Kx16-bit chips with no parity

bit.

Maximum memory size is 28 Mbytes for the T2150CDS and 32

Mbytes for the T2150CDT (if a 24 Mbyte memory card is installed).

5-volt operation.

High-speed page mode access.

Access time 70 ns.

1-6

T2150 Series

❑One super integration (SI)

The following components:

- Two DMACs 8237 equivalent

- Two PICs 8259 equivalent

- Two SIOs 16550 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 supported ECP

- One FDD control

- One speaker control

- One power communication control

❑System Controller Gate Array (VALCNT-GA)

This gate array has the following functions:

Data Bus driver

CPU data <==> ISA data

Address Bus driver

CPU address <==> ISA address

ISA control

SYCLK, DMCLK generation

ISA cycle control

DMA support control

External master support control

Refresh control

A20 control

RTC control

Clock/Reset/Suspend control

CPU clock control

STPCLK# and INTR/NMI/SMI# adjustment

SMI control

Current pass-through control

Suspend/Resume sequence

Reset generation

DMA control

Timing signal generation for DRAM

Cache control

DRAM address control

Level Shift Gate Array control

VGA chip control

T2150 Series

1-7

❑I/O Controller Gate Array (IOCNT-GA)

This gate array has the following functions:

Hotkey control

BIOS ROM interface

PS interface

NEXUS GA function

Internal communication control

KBC, main CPU communication register file

KBC interrupt control

KBC communication control

❑PCMCIA Controller Gate Array

This gate array has the following functions:

PCMCIA memory card control

❑Level Shift Gate Array

This gate array has the following functions:

Level shift 5V data bus <==> 3V data bus

❑Video Controller LSI (C&T 65545)

The T2150 series internal display controller (3.3/5 volts operation)

controls the internal VGA display and external SVGA compatible

display.

❑Keyboard Controller (KBC)

One M38802 chip is used.

This KBC includes the keyboard scan controller and keyboard inter-

face controller. The KBC controls the internal keyboard, external

keyboard port, and PS/2 mouse port.

❑Real Time Clock (RTC)

One T9934 chip is used. The T9934 has 128 bytes of memory. Four-

teen bytes of memory are used for the calender and clock. The re-

maining 114 bytes are used for the system configuration data.

1-8

T2150 Series

1.3 3.5-inch Floppy Disk Drive

The T2150 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 T2150 series FDD is shown in figure 1-3. The specifications for the FDD are described

in table 1-1.

Figure 1-3 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)

T2150 Series

1-9

1.4 2.5-inch Hard Disk Drive

The Hard Disk Drive (HDD) is a random access non-volatile storage device. It has a non-

removable 2.5-inch magnetic disk and mini-winchester type magnetic heads.

The T2150 series supports 260 million bytes (250MB) (TEG only) and 520 million bytes

(500 MB) drive.

The T2150 series HDD is shown in figure 1-4. Specifications for the HDD are described in

table 1-2.

Figure 1-4 2.5-Inch HDD

Table 1-2 2.5-inch HDD specifications

250 MB 500 MB

(MK1724FCV) (IBM-DBOA-2528)

Physical specifications

Formatted capacity (Mbytes) 262 528

Number of disks 2 2

Data heads 16 16

Data surfaces 4 3

Tracks per surface 842 1,024

Sectors per track 38 63

Bytes per sector 512 512

Access time (ms)

Track to track 3 3

Average 13 13/14 (R/W)

Maximum 25 23/24 (R/W)

Rotation speed (rpm) 4,000 4,000

Data transfer rate (bps)

To/from media 18.9 to 31.6 M 26.9 to 39.5 M

Interleave 1:1 1:1

Recording method 1-7 RLL 1-7 RLL

1-10

T2150 Series

1.5 Keyboard

The 82-(USA) or 84-(European) keyboard is mounted on the T2150 series system unit. The

keyboard is connected to the keyboard controller on the system board through a 25-pin flat

cable. The T2150 series pointer control stick, located in the center of the keyboard, provides

convenient control of the cursor without requiring desk space for a mouse. The keyboard is

shown in figure 1-5.

See Appendix E for optional keyboard configurations.

Figure 1-5 Keyboard

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