Toshiba T-Series T6600c User manual

1.1 Features
The Toshiba T6600C is one of the most powerful multimedia capable laptop computer’s
available. Utilizing advanced technology and high-speed components, the T6600C offers
excellent display legibility, and IBM PC/AT compatibility. The T6600C system unit consists
of the following features:
❑Microprocessor
The i486DX2-66 microprocessor operates at 66 MHz.
❑Math co-processor
The microprocessor (i486DX2) incorporates a math co-processor.
❑Cache memory
Eight (8) KB of cache memory is stored in the i486DX2.
Optionally, a turbo cache module (128 KB) made by Integrated Device Technology
(IDT) can be installed in the T6600C. When it is installed, the i486DX2 cache memory
is duplicated.
❑Disk storage
The internal 3.5-inch 510 Megabyte (MB) Hard Disk Drive (HDD) has an average
access time of 10 milliseconds. A 3.5-inch Floppy Disk Drive (FDD) supports 2HD
floppy disks (1.44 Mbytes) and 2DD floppy disks (720 Kbytes). The T6600C also has
a built-in 5.25-inch bay for an optional CD-ROM.
❑Memory
The T6600C comes standard with 8 MB of CMOS Random Access Memory (RAM).
This includes 640 KB of conventional memory and 7,424 KB of extended memory,
which can be utilized as a BIOS ROM data copy area, and as expanded memory that is
compatible with the Lotus/Intel/Microsoft Expanded Memory Specifications (LIM-
EMS).
❑Display
The high-resolution, Thin Film Transistor (TFT) color Liquid Crystal Display (LCD)
displays 640x480 pixels with 260 K colors for both graphics and characters.
The internal display controller supports Video Graphics Adapter (VGA) functions on
the internal display device and Super VGA (SVGA) functions on an external CRT.
The internal LCD and an external CRT can display simultaneously. The Toshiba
proprietary 640x400 mode and AT&T proprietary 640x400 mode are supported at the
BIOS level.
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❑Keyboard
The easy-to-use 101/102-key enhanced detachable keyboard with full-size keys and
standard spacing is compatible with IBM standard software.
❑Power supply
The power supply is a universal, auto-sensing power supply which enables worldwide
usage of the T6600C as long as a compatible AC plug is available.
❑Expansion slots
The two Industry Standard Architecture (ISA) bus slots allow for an IBM-compatible
full-size card and half-size cards.
❑Memory card slots
Two optional memory card slots (88-pin) enable you to install the following Toshiba
optional memory cards:
4 MB memory card: PA2004U
8 MB memory card: PA2005U
16 MB memory card: PA2010U
❑Personal Computer Memory Card International Association (PCMCIA) card slot
The optional built-in PCMCIA slot measures 16 mm high.
❑Parallel port
The Centronics-compatible parallel interface port serves two purposes: the port can
be used to connect a Centronics-compatible printer or an external 5.25-inch floppy
disk drive.
❑RS-232-C port
The RS-232-C port is a 9-pin serial interface port.
❑Mouse port
The 6-pin mouse port on the back supports an IBM PS/2 mouse.
❑Keyboard port
The 6-pin keyboard port on the back supports an IBM PS/2-compatible keyboard.

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❑RGB port
The 15-pin RGB analog port on the back supports an external CRT.
❑SCSI port
The T6600C has a Small Computer System Interface (SCSI) port.
❑Audio ports
The computer has the following standard 3.5-mm diameter miniature stereo jacks for
an audio system:
•Headphone (with speaker shut-off switch)
•Line out
•Line in
•Microphone
❑Special ports
The T6600C has a Feature connector and Z-connector for use with expansion cards.

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The T6600C Personal Computer is shown in Figure 1-1, and its system configuration is
illustrated in Figure 1-2.
Figure 1-1 T6600C Personal Computer
Figure 1-2 T6600C System Unit Configuration

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1.2 System Unit Block Diagram
Figure 1-3 shows a block diagram of the T6600C system unit.
Figure 1-3 T6600C System Board Block Diagram

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The block diagram shown in Figure 1-3 is composed of the following major components:
❑An i486DX2-66 CPU which incorporates a math co-processor and 8 KB cache
memory.
❑The following memory components:
Standard RAM: 8 MB, 32-bit data width (70 ns)
Cache memory: 8 KB (inside CPU), a turbo cache memory module can be
installed, duplicating the CPU’s cache memory.
System, Video 128 KB (96 KB are used), 8-bit data width
BIOS: 1 Mbit flash ROM. (150 ns)
This ROM contains Initial Reliability Test (IRT), Basic Input/
Output System (BIOS), and video BIOS.
SCSI BIOS: 32 KB (16 KB are used), 8-bit data width
EROM is used. (150 ns)
Video RAM: 1 MB, 16-bit data width
(Eight 256Kx4 bit chips)
Memory card: 4, 8, or 16 MB memory card can be installed.
32-bit data width.
❑Super Integration (SI) T9901, which stores the following components:
•Two Direct Memory Access Controllers (DMAC): .82C37 equivalent
•Two Programmable Interrupt Controllers (PIC): ..... 82C59 equivalent
•One Programmable Interval Timer (PIT):................ 82C54 equivalent
•One Floppy Disk Controller (FDC): ........................ TC8565 equivalent
•One Serial Input/Output Controller (SIO): .............. TC8570 equivalent
(The T6600C does not use SIO inside the T9901.)
•One Variable Frequency Oscillator (VFO):.............. TC8568 equivalent
•One I/O Controller
•One Printer Port Controller
•One Speaker Controller
❑Serial Input/Output Controller (SIO)
One NS16550 chip controls the internal serial port.
❑Real Time Clock (RTC)
One T9934 chip is used (which has 128 bytes of memory). Fourteen bytes of memory
are used for the calendar and clock, and the remaining 114 bytes are used for system
configuration data.

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❑Keyboard Controller (KBC)
An M37506E1FP chip and an 8749 chip are used.
The M37506E1FP is a keyboard interface controller which controls the internal
keyboard, external keyboard port, and PS/2 mouse port. The 8749 chip is a keyboard
scan controller which is mounted inside the detachable keyboard unit.
❑VGA Display Controller: WD90C31
This controller controls both internal and external VGA-compatible displays and
external SVGA-compatible displays with an Analog Digital Converter (DAC). The
controller can display data on the internal and external display simultaneously.
❑SCSI Controller
An AIC6260 chip controls the internal Small Computer System Interface (SCSI) port.
❑Sound Controller
An AD1848 chip controls the internal sound system.
❑The Clock Generator receives 14.31818 MHz (X1) and generates the following
frequencies:
•66 MHz for the CPU
•14.7456 MHz for the COM
•24 MHz for the FDC and VFO
•16 MHz is used for KBC (8 MHz)
•14.31818 MHz for VGA display controller
OSC (X3) generates 32.768 KHz for RTC
OSC (X) generates 24.576 MHz for sound system
OSC (X) generates 16.9344 MHz for sound system
❑Gate Arrays
System Controller Gate Array
This gate array has the following functions:
•CPU Control
•Turbo Cache Control
•Memory Control
-DRAM Control
-Compatible Bus Interface Control
•Bus Controller
-Compatible Bus Interface Control
-Compatible Access Control
-DMAC Control
-I/O Control

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•Address Latch Controller
-32-bit to 16-bit Transfer
-Address Latch
-DMA Address Generation
-Refresh Address Generation
•I/O Register
-Compatible I/O Port
-Saving the data of the Register (in resume) Control
-Toshiba Special Register
•Processing Speed Control
•Data Bus Change Controller
•Data Latch
PCMCIA Controller Gate Array
This gate array has the following functions:
•PCMCIA Card Interface control
•HDD and FDD access control by security register
•Communication control between system and KBC
•EEPROM access
•SCSI interrupt control
•External SIO control
•Sound system control
•Display type determine
•DAC digital output on/off control
•Display signal on/off control
•Back light on/off control
•Feature connector and Z-connector connect detection
•External KB select signal control
Display Timing Controller Gate Array
This gate array controls the display timing of the internal display.

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1.3 3.5-inch Floppy Disk Drive
The T6600C 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 T6600C FDD is shown in Figure 1-4, and its specifications are described 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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1.4 3.5-inch Hard Disk Drive
The Hard Disk Drive (HDD) is a random access, non-volatile storage device. It has a non-
removable 3.5-inch magnetic disk and mini-Winchester type magnetic heads.
The T6600C supports a 510 MB HDD. The disk drive is shown in Figure 1-5, and its specifi-
cations are described in Table 1-2.
Figure 1-5 3.5-inch HDD
Table 1-2 3.5-inch HDD Specifications
Item Specification
Model Name CP30544
Storage capacity (MB)
Formatted 510.0
Number of disks 3
Data heads 6
Data surfaces 6
Tracks per surface 2243
Sectors per track 59 (60) to 89 (90)
Bytes per sector 512 to 520
Access time (ms)
Track to track 2
Average 10
Maximum 18
Rotation speed (rpm) 5,400
Data transfer rate (bps)
To/from media 3.22 M
Interleave 1:1
Recording method 1-7 RLL