Toshiba Tecra 710CDT User manual

710CDT/720CDT
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1.1 Features
The Toshiba 710CDT/720CDT uses extensive Large Scale Integration (LSI) and Complemen-
tary Metal-Oxide Semiconductor (CMOS) technology to provide minimum size and weight,
low power usage and a high degree of reliability. The computer is fully optimized for Win-
dows®95 and supports plug and play technology. The computer incorporates the following
features and benefits:
❑Microprocessor
This computer uses an Intel®Pentium®133 MHz processor with Voltage Reduction
Technology (VRT) operating at 2.9/3.3 volts.
❑Cachememory
The CPU contains a 16 KB cache and a 256 KB level-2 cache with pipe-line burst
SRAM.
❑Disk storage
This computer has a 1.2 billion byte (1.13 GB) removable HDD pack.
❑Selectable Bay
The Selectable Bay allows connection to either a Floppy Disk Drive (FDD) or a CD-
ROM drive.
The FDD supports 3.5-inch 2HD (1.44 MB) disks and 2DD (720 KB) disks. The FDD
drive can be connected to an external FDD port with an attachment when the CD-ROM
drive is installed in the Selectable Bay.
A full-size, six-speed CD-ROM drive contains an AT Attachment Packet Interface
(ATAPI) controller, and supports the following formats: Red-Book, Yellow-Book,
CD-ROM XA, Photo CD, CD-Bridge, CD-I, and CD Plus.
❑Memory
This computer comes standard with 16 MB of Extend Data Out (EDO) DRAM. This
includes 640 KB of conventional memory and 15488 KB of extended memory.
❑Display
The 710CDT has a 12.1-inch, Thin Film Transistor (TFT) color LCD displaying 800 x
600 pixels.

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710CDT/720CDT
The 720CDT has a 12.1-inch TFT color LCD displaying 1024 x 768 pixels. The built-
in display controller supports full color capability up to 1280 x 1024 resolution on an
externalmonitor.
❑Keyboard
An-easy-to-use 82/84-key keyboard includes a numeric keypad overlay for fast nu-
meric data entry or for cursor and page control. The keyboard supports software that
uses a 101-key or 102-key enhanced keyboard.
❑Batteries
Three different batteries are used in this computer: a Lithium-Ion main battery, a
backup battery (for memory backup), and a Real Time Clock (RTC) battery.
❑Expansion memory slot
An optional 8, 16, 32, 64, or 128 MB memory module can be installed in the memory
slot.
❑Parallel port
This port can be used to connect a Centronicscompatible printer or other parallel
device. The port supports Extended Capabilities Port (ECP) conforming to IEEE·1284.
❑Serial port
The serial controller is 16550UART compatible. This standard, 9-pin, serial port can
be used to connect serial devices such as a serial printer, serial mouse, or external
modem.
❑Externalmonitorport
The female, 15-pin, D-shell connector can be connected to an external SVGA monitor.
This computer supports Video Electronics Standards Association (VESA) Display
Data Channel (DDC) 2B compatible functions.
❑PS/2mouse/keyboard port
Either a PS/2 compatible keyboard or a PS/2 compatible mouse can be connected to
thisport.
❑PC card slot
The PC card slot accommodates two Personal Computer Memory Card International
Association (PCMCIA) 5 mm cards (Type II), or one 10.5 mm (Type III) card which
supports PCMCIA Release 2.01. These slots can also support advanced PC cards, such
as PC Card 16’s multifunction card, CardBus 32-bit card, or a Zoomed Video (ZV)

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port, which is dedicated to high-performance video data transfer such as MPEG video
playback. The optional Desk Station V Plus and Enhanced Port Replictor II support
two additional 10.5 mm cards.
❑Docking interface port
This 240-pin port allows connection to an Enhanced Port Replicator II or a Desk
StationV Plus.
The Enhanced Port Replicator II duplicates the following ports on the computer: PS/2
keyboard, PS/2 mouse, serial, parallel, external monitor, audio line-in, audio line-out,
headphone, and microphone. It also provides a joystick port and two additional PC
card slots (Type III).
The Desk Station V Plus expands the features of the Enhanced Port Replicator II by
adding two PCI/ISA and one PCI bus expansion slots, a 5.25-inch disk drive bay, a
Selectable Bay, and an on-board SCSI-2 (small computer system interface) controller.
❑External FDD port
The external FDD port lets you connect an external FDD device when a CD-ROM
drive is installed.
❑AccuPoint
A pointer control stick, located in the center of the keyboard, provides convenient
control of the cursor without requiring desk space for a mouse.
❑Serial infrared port
This computer incorporates an IrDA1.0 (infrared data association) standard infrared
transmitter and receiver. It allows cableless data transfer at 115.2 Kbps.
❑SoundSystem
The sound system is compatible with Sound BlasterTM ProTM and Windows Sound
System. This computer is equipped with a microphone, stereo speakers, and the fol-
lowing jacks: audio line-in, audio line-out, headphone, and microphone.
❑Internal Modem (optional in some markets)
The modem supports V.34 data communication at 28.8 Kbps, V.17 class-1 facsimile
transmissions at 14.4 Kbps, and can be used as a speaker phone and Telephone An-
swering Machine (TAM). The computer is equipped with an RJ11 modem jack to
connect directly to a telephone line.

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710CDT/720CDT
The 710CDT/720CDT Personal Computer is shown in Figure 1-1 and their system configura-
tion in Figure 1-2.
Figure 1-1 710CDT/720CDT personal computer
Figure 1-2 710CDT/720CDT system unit configuration

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1.2 System Unit Block Diagram
The following figure shows a block diagram of the system unit.
Figure 1-3 System board block diagram
The system board is composed of the following major components:
❑Intel Pentium processor operating at 133 MHz and 2.9/3.3 volts. A math co-processor
and 16 KB cache memory are integrated into the processor.
❑Level-2 cache memory
DataRAM:
- 256 KB
- Two 32K x 32-bit pipe-line burst synchronous SRAM chips
- 3.3 volt operation
- 8 ns access time

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710CDT/720CDT
TagRAM:
- 32 KB (only 8 KB is used)
- One 32K x 8-bit asynchronous SRAM chip
- 3.3 volt operation
- 15 ns access time
The level-2 cache uses direct mapping, utilizing a write-through policy.
❑StandardRAM
16 MB, eight 1M x 16-bit EDO DRAM chips
3.3 volt operation
No parity bit
60 ns access time
64-bit width data transfer
❑BIOS ROM (Flash EEPROM)
256 KB, one 256K x 8-bit chip
- 128 KB are used for system BIOS
- 64 KB are used for VGA-BIOS
- 8 KB are used for plug and play data area
- 8 KB are used for password security
- 16 KB are used for boot strap
- 32 KB are reserved
5 volt operation
120 ns access time
8-bit width data transfer
❑Optionalmemory
One expansion memory slot for 8, 16, 32, 64, and 128MB memory modules, which
consist of 1M x 16-bit chips (8, 16, 32MB) and 4M x 16-bit chips (64, 128MB).
EDO DRAM is used
3.3 volt operation
No parity bit
60 ns access time
64-bit width data transfer
❑Video RAM
2 MB, four 256K x 16-bit EDO DRAM chips
5 volt operation
60 ns access time
❑System controller Gate Array
This gate array has the following functions:
- CPU interface/control
- Level-2 cache memory control
- DRAM control
- PCI master/slave interface
-Write buffer(CPU-DRAM, CPU-PCI,PCI-DRAM)

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- Prefetch buffer (PCI-DRAM)
- Two DMACs: 82C37 equivalent
- Two PICs: 82C59 equivalent
- One PIT: 82C54 equivalent
- Serial interrupt function
-Power managementcontrol
- Suspend/resume control
- CPU stop clock function
❑I/O controller Gate Array
This gate array has the following functions:
- Two UARTs 16550A equivalent (one SIO is used for SIR)
- One FDC µPD765A equivalent
- One ECP supported parallel port control
- ISA bus control
- PCI bus front end control
❑Multiplex Gate Array
This gate array is a multiplexer for a ZV port.
❑LCD interface Gate Array
This gate array controls data transfer between a VGA controller and LVDS.
❑PC Card Controller Gate Array
This gate array has the following functions:
- PC card control
- CardBus control
- ZV port support (multiplex gate array control)
❑Miscellaneous Gate Array
This gate array has the following functions:
-Communicationcontrol
Communication with KBC
I2C bus interface
Communication with power supply
Communication with Desk Station V Plus
CommunicationwithEEPROM
Communication register set
- PWM control
Beep volume
- Speaker control
- Universal I/O port
- Q-SW control
❑Modem interface Gate Array
This gate array controls modem interface LSIs.

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710CDT/720CDT
❑Video Controller
Chips & Technology F65550 is used.
The video controller controls the internal LCD and an external CRT.
❑Keyboard Controller (KBC)
One M38802M4 chip is used.
The KBC includes the keyboard scan controller and keyboard interface controller.
The KBC controls the internal keyboard, external keyboard, AccuPoint, or PS/2
mouse.
❑AccuPoint Controller (IPSC)
One KPAAC0062A chip is used.
The controller provides simultaneous control of both the AccuPoint and a PS/2 mouse.
❑Real Time Clock (RTC)
One T9934 chip is used.
The T9934 has 128 bytes of memory. Fourteen (14) bytes are used for the calendar and
clock, and the remaining 114 bytes are used for system configuration data.

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1.3 3.5-inch Floppy Disk Drive
The removable 3.5-inch FDD is a thin, high-performance, reliable drive that supports 720-KB
(formatted) 2DD and 1.44-MB (formatted) 2HD disks. When a CD-ROM is installed in the
Selectable Bay, an FDD attachment can be used to connect the FDD to the external FDD port.
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 1,440 720
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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710CDT/720CDT
1.4 2.5-inch Hard Disk Drive
The removable HDD is a random access, nonvolatile storage device. It has a non-removable
2.5-inch magnetic disk and mini-winchester type magnetic heads.
710CDT/720CDT supports a 1.13 GB HDD.
The HDD is shown in Figure 1-5, and its specifications are listed in Table 1-2.
Figure 1-5 2.5-inch HDD
Table 1-2 2.5-inch HDD specifications
Items (MK2720FC)
Storage capacity (GB) 1,216,954,368
Cylinders 2,358
Heads 16
Sectors 63
Bytes per sector 512
Rotation speed (rpm) 4,200
Recording method 8-9 RLL