Toshiba T1950 Manual de usuario

1-1

1.1 Features

The T1950, T1950CS and T1950CT units consist of the following features.

Processor Intel SL-Enhanced 486DX2/40Mhz. (P24S chip)

Processor Type DX2: (3.3v w/8KB internal cache) Co-processor embedded.

BIOS 128KB flash EPROM (150ns)

RAM 4MB Expandable to 20MB (80ns)

Display T1950: Fluorescent Sidelit Monochrome LCD

T1950CS: Dynamic-STN Dual Scan Color LCD

T1950CT: TFT Active Matrix Color LCD

Ext. Display T1950 & T1950CS: VGA 640 x 480 (16 colors of 4096)

T1950CT: 800 x 600/256 colors;1024 x 768/256 colors

(using Toshiba supplied drivers)

FDD 3 1/2" 1.44MB

HDD T1950 & T1950CS: 120MB/200MB

T1950CT: 200MB/320MB

Optional Peripherals 101-key Keyboard (PS/2)

1 - 14.5mm PCMCIA Type III (2.0)

Ports 19-PIN Serial (16450 UART)

1Parallel/FDD: BI-DIR

115-PIN RGB

1Mouse Quick Port (DCBM)

1PS/2 Mouse Port (not usable if DCBM connected)

Keyboard 1101-key Keyboard Port (PS/2)

82-Keys, 3mm Travel

Battery NIMH (12V 2400mAH) PART# PA2420UXRA

Battery Life 2-3 HRS.

Recharge Time 1.4-2.3 HRS (Computer off only)

AC Adapter T1950 & T1950CS: Input: 100-240VAC , Input Frequency:

50-60Hz, Input Power: .5A - .28A (50/60Hz)

Output Voltage: 18 VDC, 1.1A

T1950CT: Input: 100-240VAC, Input Frequency: 50-60Hz,

Input Power: .7A - .4A (50/60Hz)

Output Voltage: 18 VDC, 1.7 A

Bundled Software Toshiba DOS 6.0; Windows 3.1; MaxTime; Ultrafont.

Dimensions T1950: 11.7"W x 8.4"D x 2.0"H, 6.4 lbs.

T1950CS & T1950CT: 11.7"W x 8.4"D x 2.1"H, 7 lbs.

1-2

The T1950 Series Personal Computer is shown in Figure 1-1, and its system configuration is

shown in Figure 1-2.

Figure 1-1 T1950 Series Personal Computer

Figure 1-2 T1950 Series System Unit Configuration

1-3

1.2 System Unit Block Diagram

Figure 1-3 is a block diagram of the T1950 Series system unit.

Figure 1-3 T1950 Series System Board Block Diagram

1-4

The T1950 Series system board is composed of the following major components:

❑An i486DX2-40 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 of bytes memory. Fourteen bytes of

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

system configuration data.

OSC (X3) generates 32.768 KHz for RTC.

❑A Keyboard Controller (KBC)

One M37452M4 chip is used.

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 ROM contains Initial Reliability Test (IRT), Basic Input/

Output System (BIOS), and video BIOS.

Video RAM: 256 KB

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

❑VGA display controller

T1950/T1950CS (GOGH): This controller controls internal and external VGA com-

patible display.

T1950CT (WD90C24): This controller controls internal VGA display and external

SVGA compatible display.

1-5

❑Clock Generator receives 14.31818 MHz (X2) and generates the following frequen-

cies:

•20 MHz for the CPU (CPU operates at 40MHz.)

•14.7456 MHz for the COM

•24 MHz for the FDC and VFO

•16 MHz is used for GA

•14.31818 MHz is used for T9901 (SI)

❑Gate Array

System Controller Gate Array

This gate array has the following functions:

•CPU Controller

•Memory Controller

-DRAM Controller

-Compatible Bus Interface Controller

•SMI Controller

•VL Bus Controller

•Bus Controller

-Compatible Bus Interface Controller

-Compatible Access Controller

-DMAC Controller

-I/O Controller

•Address Latch Controller

-32-Bit to 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

•40 MHz/20 MHz Controller

•Data Bus Change Controller

•Data Latch

PCMCIA Controller Gate Array

This gate array has the following functions:

•Memory Card Controller

-PCMCIA IC Card Controller

-Toshiba Modem Card Controller

1-6

1.3 3.5-inch Floppy Disk Drive

The T1950 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 T1950 Series FDD is shown in Figure 1-4, and 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)

1-7

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 T1950/T1950CS supports a 120 or 200 MB HDD. The T1950CT supports a 200 or

320 MB HDD.

A T1950 Series HDD is shown in Figure 1-5, and specifications are listed in Table 1-2.

Figure 1-5 2.5-inch HDD

Table 1-2 2.5-inch HDD Specifications

120 MB 200 MB 320 MB

(CP2124) (MK2124FC) (MK2224FC) (MK2326FC)

Storage capacity (MB)

Formatted 121.6 130.1 213.0 340.0

Number of disks 2 2 2 3

Data heads 4 4 4 6

Data surfaces 4 4 4 6

Tracks per surface 1,123 1,155 1,560 1,830

Sectors per track 53 (+1) 55 (+1) – –

Bytes per sector 512 512 512 512

Access time (ms)

Track to track 3 5 3 3

Average 16 17 12 12

Maximum 30 36 25 25

Rotation speed (rpm) 3,743 3,200 4,000 4,200

Data transfer rate (bps)

To/from media 18 M 15.3 M 18.9 to 18.7 to

31.6 M 29.6 M

Interleave 1:1 1:1 1:1 1:1

Recording method 2-7 RLL 1-7 RLL 1-7 RLL 1-7 RLL

1-8

1.5 Keyboard

The 82-(USA) or 84-(European) keyboard is mounted on the T1950 Series system unit, and is

connected to the keyboard controller on the system board through a 19-pin flat cable. The

keyboard is shown in Figure 1-6.

Figure 1-6 Keyboard

1-9

1.6 Monochrome LCD (T1950)

The monochrome Liquid Crystal Display (LCD) is composed of an LCD module, a Fluores-

cent Lamp (FL), and an FL inverter board.

1.6.1 Monochrome LCD Module

The T1950 monochrome LCD supports 640x480 pixels with a Video controller and 64 levels

of gray. The video controller includes the functions of the Video Graphics Array (VGA).

The LCD receives vertical and horizontal synchronizing signals, 8-bit data signals (4-bit upper

block data signal and 4-bit lower block data signal), and shift clock for data transmission. All

signals are CMOS-level compatible.

The sidelit LCD is shown in Figure 1-7, and its specifications are listed in Table 1-3.

Figure 1-7 Monochrome LCD

Table 1-3 Monochrome LCD Specifications

Item Specifications

Number of Dots (dots) 640 x 480

Dot pitch (mm) 0.30 (W) x 0.30 (H)

Display area (mm) 198 (W) x 150 (H)

Contrast 17:1 (typically)

FL current (mA) 5.0

FL frequency (KHz) 42

1-10

1.6.2 Monochrome Fluorescent Lamp (FL) Inverter Board

The FL inverter board supplies the high frequency current needed to illuminate the FL.

The specifications for the FL inverter board are listed in Table 1-4.

Table 1-4 Monochrome FL Inverter Board Specifications

Item Specifications

Input Voltage (VDC) 5

Power (W) 2.2

Voltage (VAC) 950

Output Current (mA) 4.2

Frequency (KHz) 38.5

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