Toshiba Satellite Pro 420CDT User manual

420 Series 1-1
1.1 Features
The 420CDT/420CDS (420 Series) is one of the lightest and most advanced portable comput-
ers available. Utilizing advanced technology and high-speed components, the 420 series
offersmultimediafunctions,excellentdisplaylegibility,batteryoperation,andIBMPC/AT
compatibility. The 420 series system unit consists of the following features:
❑Microprocessor
An Intel Pentium processor with Voltage Reduction Technology (VRT) that operates
at 100 MHz and 3.3/2.9 volts.
❑Disk storage
The 420CDT has an internal 1.3 billion byte (1.26 GB) or 810 million byte (770 MB)
Hard Disk Drive (HDD). The 420CDS has an internal 810 million byte HDD. A 3.5-
inch Floppy Disk Drive (FDD) supports 2HD (1.44 MB) floppy disks and 2DD (720
KB) floppy disks. The FDD can also be installed in an attachment for connection as an
externaldevice.
❑CD-ROM Drive
A full-size, six-speed CD-ROM drive module can be installed instead of the FDD
module. The CD-ROM drive contains an ATAPI (AT attachment packet interface)
interface controller, and supports the following formats: audio CD, photo CD, CD-
plus, and ISO 9660.
❑Memory
Standard with 8 MB of CMOS RAM. This includes 640 KB of conventional memory
and 7360 KB of extended memory, which can be utilized as expanded memory com-
patible with the Lotus/Intel/Microsoft Expanded Memory Specification (LIM-EMS).
❑Display
The 420CDT has an 11.3-inch, Thin Film Transistor (TFT) color LCD with 800 x 600
pixels. The 420CDS has an 11.3-inch Dual-scan Supertwist Nematic (DSTN) color
LCD with 800 x 600 pixels. The built-in display controller supports 800 x 600 resolu-
tion with 16M colors capability and up to 1280 x 1024 resolution with 256 colors on
an external CRT.
❑Keyboard
An-easy-to-use 82/84-key keyboard provides a numeric keypad overlay for fast nu-
meric data entry or for cursor and page control. The keyboard supports software that
uses a 101- or 102-key enhanced keyboard.

1-2 420 Series
❑Batteries
Three different batteries: an Li-Ion main battery, a backup battery (for memory
backup), and an RTC battery (for Real Time Clock).
❑Expansionmemoryslot
An optional 8, 16, or 32 MB memory module can be installed in the memory slot.
❑Parallel port
Can be used to connect a Centronics compatible printer or other parallel device. The
port supports ECP (Extended Capabilities Port) conforming to IEEE·1284.
❑Serial port (9-pin)
The serial controller is 16550UART compatible. This port can be used to connect such
serial devices as a serial printer, serial mouse, or external modem.
❑External monitor port
The female, 15-pin, D-shell connector can be connected to an external SVGA monitor.
❑PS/2 mouse/keyboard port
Either a PS/2 compatible keyboard or a PS/2 compatible mouse can be connected to
this port. The computer automatically recognizes which device is connected.
❑FDD port
Enables a connection of the external FDD attachment if the CD-ROM module is
installedinsidethesystemunit.
❑PC card slot
A PC card slot accommodates two 5mm cards (Type II) or one 10.5mm (Type III)
card, which support PCMCIA Release 2.01 cards. These slots also support advanced
cards, including PC Card 16 multifunction cards as well as the Zoomed Video (ZV)
port, which is dedicated to high-performance video data transfer such as MPEG video
playback.
❑Enhanced port replicator port
Enables connection of an enhanced port replicator. The enhanced port replicator has
two PC card slots (Type III), and expands connections to the following devices: PS/2
keyboard, PS/2 mouse, serial port, parallel port, external CRT, joystick/MIDI port,
audio line-in, audio line-out, headphone, external FDD, AC-in, AC-out, and rotary
switch (ID select switch).
❑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.

420 Series 1-3
❑Infrared port
Incorporates an IrDA1.0 (115.2Kbps supported) standard infrared transmitter and
receiver.
❑Sound System
A Sound Blaster Pro compatible sound system provides capability to record sound and
play it back with a built-in microphone and speaker. The sound system is equipped
with a volume control dial, headphone jack, microphone jack, and audio line-in jack.
The 420 Series Personal Computer is shown in Figure 1-1.
Figure 1-1 420 series personal computer
The 420 system configuration is shown in Figure 1-2.
Figure 1-2 420 system unit configuration

1-4 420 Series
1.2 System Unit Block Diagram
Figure 1-3 is a block diagram of the 420 series system unit.
Figure 1-3 420 series system board block diagram

420 Series 1-5
The 420 series system board is composed of the following major components:
❑Microprocessor
One Intel Pentium processor with VRT 64-bit microprocessor
Intel Pentium processor operates at 100 MHz and 3.3/2.9 volts
❑Standard RAM
8 MB, four 1Mx16-bit chips
3.3 volt operation
No parity bit
Access time 60 ns
Data transfer is 64-bit width
EDO (extended data output) supported
❑BIOS ROM (Flash EEPROM)
128 KB (one 128Kx8-bit chip) memory
64 KB in the ROM are used for system BIOS
40 KB in the ROM are used for VGA BIOS
24 KB in the ROM are reserved
Access time 150 ns
Data transfer is 8-bit width
❑Video RAM
2 MB (Four 256Kx16-bit DRAM)
5 volt operation
❑Optionalmemory
One expansion memory slot is available for 8, 16, and 32 MB memory modules, which
consist of some 1 MBx16-bit chips.
Total maximum memory size is 40 MB (if a 32 MB memory module is installed).
3.3 volt operation
No parity bit
Access time 60 ns
Data transfer is 64-bit width
EDO (extended data output) supported
❑One super integration (SI)
Thefollowing components:
- Two DMACs 82C37equivalent
- Two PICs 82C59equivalent
- Two UART 16550equivalent
- One PIT 82C54equivalent
- One FDC TC8565equivalent
- One VFO TC8568equivalent
- 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

1-6 420 Series
❑System Controller Gate Array (SCPCNT-GA)
This gate array has the following functions:
• CPU control
- SMI control
- CPU clock control
• Memory control
- 64-bit bus memory control
- 32-bit bus memory control
• Bus control
- 64-bit data bus <==>32-bit data bus
- 32-bit local bus control
• Address latch control
• I/O register control
• Processing speed control
❑ISA Bus Controller Gate Array (SISCNT-GA)
This gate array has the following functions:
• Bus control
- 32-bit data bus <==> 16-bit data bus
- ISA bus interface control
- ISA bus access control
- DMAC control
- DMA address generation
- I/O control
- Suspend/Resumesequence
• Memory control
- ISA bus interface control
- Refresh address generation
• I/O register control
• Suspend/Resumesequence
❑PC Card Controller Gate Array
This gate array has the following functions:
• PCMCIA memory card control
• PCMCIA I/O card control
❑I/O Controller Gate Array (IOCNT-GA)
This gate array has the following functions:
• InternalCommunicationcontroller
- KBC, main CPU communication register file
- KBC interrupt controller
- KBCcommunicationcontroller
-I
2
C bus control

420 Series 1-7
• Others
- Speaker volume adjust PWM control
- Sound board interface
- BIOS-ROMinterface
- SMI control
- IrDA (SIR) control
❑Video Controller
Chips & Technologies F65550 is used
This video controller controls internal TFT/DSTN color LCD and external SVGA
compatibleCRT.
❑Keyboard Controller (KBC)
One M38802M4 chip is used
This KBC includes the keyboard scan controller and keyboard interface
controller. The KBC controls the internal keyboard, external keyboard, and
PS/2 mouse.
❑AccuPoint Controller (IPSC)
One KPAAC0062A chip is used
This 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 bytes of memory are used for the
calendar and clock. The remaining 114 bytes are used for the system configuration
data.

1-8 420 Series
1.3 3.5-inch Floppy Disk Drive
The 420 series 3.5-inch removable FDD is a thin, high-performance reliable drive that sup-
ports 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 an
external FDD port.
The 420 series FDD is shown in Figure 1-4.
Figure 1-4 3.5-inch FDD
The specifications for the FDD are listed in Table 1-1.
Table 1-1 3.5-inch FDD specifications
Item 2-MB mode 1-MB mode
Storage capacity (KB)
Unformatted 2,000 1,000
Formatted 1,475 737
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)

420 Series 1-9
1.4 2.5-inch Hard Disk Drive (HDD)
The Hard Disk Drive 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 420CDT supports 1.3 billion bytes (1.26GB) and 810 million bytes (770MB).The
420CDS supports 810 million bytes (770MB).
The 420 series is shown in Figure 1-5.
Figure 1-5 2.5-inch HDD
Specifications for the HDD are listed in Table 1-2.
Table 1-2 2.5-inch HDD specifications
770 MB 1.26 GB
Items MK1926FCV DSOA-20810 MK1301MAV
Formatted capacity (byte) 814,915,584 812,851,200 1,358,880,768
Number of disks 3 2 3
Logical heads 16 16 16
Logical cylinders 1,579 1,575 2,633
Bytes per sector 512 512 512
Rotation speed (rpm) 4,200 4,000 4,200

1-10 420 Series
1.5 Keyboard
The 82-(USA) or 84-(European) key keyboard is mounted on the 420 series system unit. The
keyboard is connected to the keyboard controller on the system board through a 25-pin flat
cable. The 420 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 1-6.
See Appendix E for optional keyboard configurations.
Figure 1-6 Keyboard