Toshiba Portege 610CT User manual

610CT
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1.1 Features
The Toshiba 610CT is one of the lightest and most advanced portable computers available.
Utilizing advanced technology and high-speed components, the 610CT offers excellent display
legibility, battery operation, and IBM PC/AT compatibility. The 610CT system unit has the
following features:
❑Microprocessor
A Pentium® Processor 90MHz with Voltage Reduction Technology (VRT) that
operates at 90 MHz, 2.9 Volts.
❑Cache memory
A 16 KB cache memory which is stored in the Pentium® Processor.
❑Disk storage
An internal 720 million-byte (MB) Hard Disk Drive (HDD) with an average access
time of 15 milliseconds. A 3.5-inch external Floppy Disk Drive (FDD) supports 2HD
floppy disks (1.44 MB) and 2DD floppy disks (720 KB).
❑Memory
Standard with 8 MB of CMOS Random Access Memory (RAM) 3.3 Volts. This
includes 640 KB of conventional memory and 7,360 KB of extended memory which
can be utilized as expanded memory compatible with the Lotus/Intel/Microsoft Ex-
panded Memory Specifications (LIM-EMS).
❑TFT color LCD
A high-resolution, Thin Film Transistor (TFT) full-color LCD displays 640x480 pixels.
The internal display controller supports VGA functions for internal display and Super
VGA (SVGA) for external display.
❑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 computer’s keyboard supports
software that uses a 101- or 102-key enhanced keyboard.
❑Batteries
Three different batteries: a main battery, a backup battery, and a Real Time Clock
(RTC) battery.

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610CT
❑Personal Computer Memory Card International Association (PCMCIA) card slot
Two PCMCIA slots enable you to install an MiNC Toshiba card modem or other
industry-standard PCMCIA release 2.01 card.
❑Parallel port
One Centronics compatible parallel interface port.
❑RS-232-C port
One 9-pin serial interface port.
❑3.5-inch external FDD port
One 3.5-inch external FDD port.
❑Port replicator port
One port replicator port enables connection of an optional port replicator or external
monitor adapter. The port replicator allows connection of a PS/2 mouse, PS/2 key-
board, external monitor, printer, DC IN, serial I/O, and 3.5-inch FDD.
❑Memory module slot
One Toshiba optional memory module slot enables you to install a Toshiba optional
memory module.
❑AccuPoint
Apointer control stick, located in the center of the keyboard.
❑Sound System
ASound Blaster™ Pro™ compatible sound system to give multimedia capability with
a built-in microphone and speaker. The sound system provides a volume control dial
and headphone and microphone jacks to connect external audio devices.

610CT
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The 610CT Personal Computer is shown in figure 1-1.
Figure 1-1 610CT
The 610CT system configuration is shown in figure 1-2.
Figure 1-2 610CT system unit configuration

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610CT
1.2 System Unit Block Diagram
Figure 1-3 is a block diagram of the 610CT system unit.
Figure 1-3 610CT system board block diagram

610CT
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The 610CT system board has the following major components:
❑One Intel Pentium-90 MHz with VRT 64-bit microprocessor
Intel Pentium processor operates at 90 MHz and 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
Available hyper page mode (EDO)
❑BIOS ROM (Flash EEPROM)
128 MB (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
40 KB in the ROM are reserved
Access time 150 ns
Data transfer is 8-bit width
❑Video RAM
1 MB (Two 256Kx16-bit DRAM)
5 volt operation
❑Optional memory
One expansion memory slot is available for 8, 16, and 32 MB memory modules, which
may consist of 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
Available hyper page mode (EDO)
❑One super integration (SI)
The following components:
- Two DMACs 82C37 equivalent
- Two PICs 82C59 equivalent
- Two SIOs 16550 equivalent (One SIO is not used)
- One PIT 82C54 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

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610CT
❑System Controller Gate Array (SCPCNT6-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 (SISCNT3-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/Resume sequence
Memory control
IAS bus interface control
Refresh address generation
I/O register control
Suspend/Resume sequence
❑PCMCIA Controller Gate Array
This gate array has the following functions:
PCMCIA memory card control
❑I/O Controller Gate Array (IOCNT-GA)
This gate array has the following functions:
Internal Communication controller
KBC, main CPU communication register file
KBC interrupt controller
Others KBC communication controller
Contrast adjust, speaker volume adjust, PWM control
Sound board interface
BIOS-ROM interface
SIM control

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❑Video Controller
This video controller controls internal TFT color LCD and external SVGA compatible
CRT.
❑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, PS/2 mouse.
❑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.

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610CT
1.3 3.5-inch External Floppy Disk Drive
The 610CT 3.5-inch external 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 610CT FDD is shown in figure 1-4.
Figure 1-4 3.5-inch external FDD
The specifications for the FDD are listed in table 1-1.
Table 1-1 3.5-inch external 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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1.4 2.5-inch Hard Disk Drive
The 720 MB 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 HDD 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
Items (MK1724FCV)
Storage capacity (MB)
Formatted 722 MB
Number of disks 2
Data heads 4
Data surfaces 4
Bytes per sector 512
Rotation speed (rpm) 4000
Recording method 1-7 RLL

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610CT
1.5 Keyboard
The 82-(USA) or 84-(European) keyboard is mounted on the 610CT system unit. The key-
board is connected to the keyboard controller on the system board through a 25-pin flat cable.
The 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