Toshiba T-Series T4500 Bedienungsanleitung

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1.1 Features

The Toshiba T4500/T4600 Family is one of the lightest and most advanced portable computers

available. Utilizing advanced technology and high-speed components, the T4500/T4600 Family

offers excellent display legibility, battery operation and IBM PC/AT compatibility. The T4500/

T4600 Family system unit consists of the following features:

❑Microprocessor

The T4500 and T4500C uses an i486SX-20 microprocessor that operates at 20 MHz, 3.3

Volts. The T4600 and T4600C uses an i486SL-33 microprocessor that operates at 33 MHz,

3.3 Volts.

❑Cache memory

The T4500/T4600 Family utilizes an 8 KB cache memory stored in either the i486SX or

i486SL microprocessor.

❑Disk storage

The T4500 and T4500C have an internal 80, 120, or 200 Megabyte (MB) Hard Disk Drive

(HDD) with an average access time of 19 milliseconds. The T4600 and T4600C have an

internal 120, 200, or 320 MB HDD. A 3.5-inch Floppy Disk Drive (FDD) supports 2HD

floppy disks (1.44 Mbytes) and 2DD floppy disks (720 Kbytes).

❑Memory

The T4500/T4600 Family comes standard with 4 MB of CMOS Random Access Memory

(RAM) 3.3 Volts. This includes 640 KB of conventional memory and 3,456 KB of extended

memory which can be utilized as expanded memory compatible with the Lotus/Intel/

Microsoft Expanded Memory Specifications (LIM-EMS).

❑Monochrome LCD (T4500/T4600)

A high-resolution, Liquid Crystal Display (LCD) displays 640 x 480 pixels with a 64-level

gray scale. The T4500 and T4600 internal display controller supports Video Graphics

Adapter (VGA) functions on the internal display device.

❑TFT color LCD (T4500C/T4600C)

A high-resolution, Thin Film Transistor (TFT) color Liquid Crystal Display (LCD) displays

640 x 480 pixels with 512 colors for both graphics and characters. The T4500C has an 8.4-

inch TFT color display, and the T4600C has a 9.5-inch TFT color display. The T4500C and

T4600C internal display controller supports Video Graphics Adapter (VGA) functions on

the internal display devices.

❑Keyboard

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

compatible with IBM standard software.

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❑Batteries

The T4500/T4600 Family has three different batteries: a main battery, a backup battery,

and a Real Time Clock (RTC) battery.

❑Expansion port

The T4500/T4600 Family has a unique 150-pin expansion port which attaches to a Desk

Station IV or Desk Station IV Plus.

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

The T4500 and T4500C each have one PCMCIA slot, and the T4600 and T4600C each have

two PCMCIA slots which enable you to install a Toshiba MiNC card modem or other

industry standard PCMCIA card.

❑Parallel port

The T4500/T4500C’s Centronics-compatible parallel interface port serve two purposes.

The port can be used to connect a Centronics-compatible printer or an external 5.25-inch

floppy disk drive. T4600/T4600C’s port is a parallel interface only and does not support an

external floppy disk drive.

❑RS-232-C port

The T4500/T4600 Family has one 9-pin serial interface port.

❑Mouse port

The T4500/T4600 Family has one 6-pin mouse port on the back that can be connected to an

IBM PS/2 mouse.

❑Keyboard port

The T4500/T4600 Family has one 6-pin keyboard port on the back that can be connected to

an IBM PS/2 keyboard.

❑Microsoft Ball Point mouse with Quick Port (BPQP) connection

The T4500/T4600 Family has one BPQP port on the right.

❑RGB port

The T4500/T4600 Family has one 15-pin RGB port on the back that can be connected to an

external video display.

❑Memory card slot

The T4500/T4600 Family has one Toshiba optional memory card slot which enables you to

install an optional Toshiba memory card.

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The T4500/T4600 Family Personal Computer is shown in Figure 1-1. The T4500/T4500C system

configuration is shown in Figure 1-2, and the T4600/T4600C system configuration is shown in

Figure 1-3.

Figure 1-1 T4500/T4600 Family Personal Computer

Figure 1-2 T4500/T4500C System Unit Configuration

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Figure 1-3 T4600/T4600C System Unit Configuration

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1.2 System Unit Block Diagram

Figure 1-4 is a block diagram of the T4500/T4500C system unit.

Figure 1-4 T4500/T4500C System Board Block Diagram

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The T4500 and T4500C system board shown in Figure 1-4 is composed of the following major

components:

❑An i486SX-20 CPU

❑Super Integration (SI) T9901, which stores the following components:

●Two Direct Memory Access Controllers (DMAC): 82C37

●Two Programmable Interrupt Controllers (PIC): 82C59

●One Programmable Interval Timer (PIT): 82C54

●One Floppy Disk Controller (FDC): TC8565

●One Serial Input/Output Controller (SIO): TC8570

●One Variable Frequency Oscillator (VFO): TC8568

●One I/O Controller

●One Printer Port Controller

●One Speaker Controller

❑A Real Time Clock (RTC)

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

are used for the calendar and clock. The remaining 114 bytes are used for the system

configuration data.

❑A Keyboard Controller (KBC)

One M37452M4 chip is used. This KBC includes the keyboard scan controller and key-

board interface controller. The KBC controls the internal keyboard, external keyboard port,

PS/2 mouse port, and ball point quick port.

❑Memory configurations

Standard RAM: 4 MB

Cache memory: 8 KB (inside CPU)

BIOS ROM: 128 KB (96 KB are used)

This Read Only Memory (ROM) contains Initial Reliability Test (IRT),

Basic Input/Output System (BIOS), and video BIOS.

Video RAM: 512 KB

Optional memory cards expand memory to a maximum of 20 MB.

❑VGA display controller: WD90C26A (144-pin) (3.3 volt operation)

This controller controls internal and external VGA compatible display. It can display the

internal and external display at the same time.

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❑Clock Generator receives 14.31818 MHz (X1) and generates the following frequencies:

●20 MHz for the CPU

●14.7456 MHz for the COM

●24 MHz for the FDC and VFO

●16 MHz is used for GA

●14.31818 MHz for WD90C26A (for VGA)

OSC (X3) generates 32.768 KHz for RTC.

❑Gate Array

System Controller Gate Array

This gate array has the following functions:

●Memory Controller

-DRAM Controller

-CPU Controller

-Compatible Bus Interface Controller

●Bus Controller

-Compatible Bus Interface Controller

-Compatible Access Controller

-DMAC Controller

-I/O Controller

●Address Latch Controller

-32-Bit →16-Bit Controller

-Address Latch

-DMA Address Generator

-Refresh Address Generator

●I/O Register

-Compatible I/O Port

-Saving the data of the Register (in resume) Controller

-Toshiba Special Register

●20 MHz/10 MHz Controller

-Data Bus Change Controller

-Data Latch

Sub LCD Controller Gate Array

This gate array has the following functions:

●Status Indicator Panel Controller

-LCD Segment Flashing Controller

●Internal Communication Controller

-KBC/Power Supply Micro Processor/Main CPU Communication

Controller

-KBC/Power Supply Micro Processor Interrupt Controller

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IC Card Controller Gate Array

This gate array has the following functions:

●IC Card Controller

-PCMCIA IC Card Controller

-Toshiba Modem Card Controller

●EEPROM (for security) Controller

-KBC-Security-EEPROM Communication Controller

●Others

-KBC Communication Controller

-Disable the PRT/FDD Port, HDD Access Controller

-Suspend/Resume Controller

The block diagram of the T4600 and T4600C system board is shown in Figure 1-5.

Figure 1-5 T4600/T4600C System Board Block Diagram

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The T4600 and T4600C system board shown in Figure 1-5 is composed of the following major

components:

❑An i486SL-33 CPU

❑One Intel 82360SL

This component is super set with the i486SL microprocessor and stores the following CPU

peripheral components:

●Two DMACs 8237 equivalent

●Two PICs 8259 equivalent

●Two PITs 8254 equivalent (T4600 and T4600C uses one PIT.)

●Two SIOs 16450 equivalent (T4600 and T4600C uses one SIO.)

●One RTC MC146818AF equivalent

●One EPP (Enhanced Parallel Port) controller

❑One super integration (SI) T9920

The components include the following:

●One FDC TC8565 equivalent

●One VFO TC8568 equivalent

●One speaker controller

❑A Keyboard Controller (KBC): M37452M4

This KBC includes the keyboard scan controller and keyboard interface controller. The

KBC controls the internal keyboard, external keyboard port, PS/2 mouse port, and ball point

quick port.

❑The following memories:

Standard RAM: 4 MB

Cache memory: 8 KB (inside CPU)

BIOS ROM: 128 KB (96 KB are used)

This Read Only Memory (ROM) contains Initial Reliability Test (IRT),

Basic Input/Output System (BIOS), and video BIOS.

Video RAM: 512 KB

Optional memory cards expand memory to a maximum of 20 MB.

❑VGA display controller: WD90C26A (144-pin) (3.3 volt operation)

This controller controls internal and external VGA compatible displays. It can display the

internal and external displays at the same time.

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❑Clock Generator receives 14.31818 MHz (X1) and generates the following frequencies:

●66.6 MHz for the CPU

●14.7456 MHz for the COM

●24 MHz for the FDC and VFO

●16 MHz is used for GA

●14.31818 MHz for WD90C26A (for VGA)

OSC (X3) generates 32.768 KHz for RTC (inside of the 82360SL).

❑A Power Supply Controller (PSC): TMP90PH48

❑Gate Array

Sub LCD Controller Gate Array

This gate array has the following functions:

●Status Indicator Panel Controller

-LCD Segment Flashing Controller

●Internal Communication Controller

-KBC/Power Supply Micro Processor/Main CPU Communication

Controller

-KBC/Power Supply Micro Processor Interrupt Controller

IC Card Controller Gate Array

This gate array has the following functions:

●IC Card Controller

-Two cards support PCMCIA Card Controller

-Toshiba Modem Card Controller

●EEPROM (for security) Controller

-KBC-Security-EEPROM Communication Controller

●Others

-KBC Communication Controller

-Disable the HDD/FDD/SIO Access Controller

-Suspend/Resume Controller

Andere Handbücher für T-Series T4500

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