Toshiba T1900 Series User manual

1.1 Features
The Toshiba T1900 Series of computers are among the highest and most advanced notebook
computers available. Utilizing advanced technology and high-speed components, the T1900
and T1900C offer excellent display legibility, battery operation and mM PC/AT compatibility.
The T1900 Series
of computers consist of the following features:
o Microprocessor
The i486SX-20 microprocessor operates
at 20 MHz, 3.3 Volts.
o Cache memory
8
KB of cache memory is stored in the i486SX microprocessor.
o Disk storage
The internal 80, 120, or 200 Megabyte (MB) Hard DiskDrive (HOD) has an
average access time
of 19 milliseconds. A 3.5-inch Floppy DiskDrive (FDD)
supports
2HD floppy disks (1.44 Mbytes) and 2DD floppy disks (720 Kbytes).
o Memory
The
T1900ff1900C comes standard with 4 MB of CMOS Random Access
Memory (RAM) 3.3 Volts. This includes 640
KB of conventional memory and
3,456
KB of extended memory which can be utilized as expanded memory
compatible with the LotuslIntellMicrosoft Expanded Memory Specifications
(LIM-EMS).
o Monochrome LCD (TI900)
The high-resolution, Liquid Crystal Display (LCD) displays 64Ox480 pixels with
a 64-level gray scale.
The T1900 internal display controller supports Video Graphics Array (VGA)
functions
on the internal display device.
o STN color LCD (TI900C)
The high-resolution, Ultra Supertwist Nematic (Ultra STN) colorLiquid Crystal
Display (LCD) displays 64Ox480 pixels with 226,981 colors for
both graphics
and characters.
The T1900C internal display controller supports Video Graphics Array (VGA)
functions
on the internal display devices.
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1-2
o Keyboard
An easy-to-use 82184-key enhanced keyboard with full-size keys and standard
spacing
is compatible with mM standard software.
o Batteries
The computer uses three different batteries: a
main battery, a backup battery,
and a Real Time Clock (RTC) battery.
o Personal Computer Memory Card International Association (pCMCIA) card
slot
A PCMCIA slot enables you to install
an MiNC Toshiba card modem or other
industry-standard PCMCIA Release 2.0 card.
o Parallel port
The Centronics-compatible parallel interface port serves two purposes: the port
can be used to connect a Centronics-compatible printer oran external 5 114"
floppy disk drive.
o RS-232-C port
A 9-pin serial interface port.
o Mouseport
The 6-pin mouse port on the back can accommodate
an mM PS/2 mouse.
o Keyboard port
The 6-pin keyboard port on the back
can accommodate an mM PS/2 keyboard.
o Microsoft Ball Point mouse with Quick Port (BPQP) connection
The BPQP port
is located on the right side of the TI9001TI900C.
o RGBport
The IS-pin
RGB port on the back can accommodate an external video display.
o Memory card slot
The memory card slot enables you to install a Toshiba optional memory card.

The T1900ff1900C Personal Computer is shown in Figure 1-1, and its system configuration
is shown in Figure 1-2.
Figure 1-1 T19001T190OC Personal Computer
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PJ11
PJ3
PJ6
PJ7
PJ4
PJ9
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FATSUe
System
Board
PJ1
PJ5
PJ10
PJ502
I
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,
,
,
,
1- ________ _
Power Supply
PJ206
PJ205
FATSLe
System
Board
PJ204
PJ203
PJ202
PJ201
Figure J-2 TJ900ITJ90OC System Unit Configuration
1-3

1.2 System Unit Block Diagram
Figure 1-3 is a block diagram of the T1900fI'1900C system unit.
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1-4
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Figure 1-3 T19001T190OC System BoardBlockDiagram

The T19001T1900C system board is composed of the following major components:
o An i486SX-20 CPU
o 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 (FOC): TC8565
• One Serial Input/Output Controller (SID): TC8570
• One Variable Frequency Oscillator (VFO): TC8568
• One I/O Controller
• One Printer Port Controller
• One Speaker Controller
o A Real Time Clock (RTC)
A T9934 chip with 128 bytes
of memory is used. Fourteen bytes are used for the
calendar and clock, and the remaining 114 bytes are used for system configura-
tion data.
OSC (X3) generates 32.768 KHz for RTC.
o A Keyboard Controller (KBC)
AnM37452M4 chip is used.
The KBC, which includes the keyboard scan controller and keyboard interface
controller, controls the internal keyboard, external keyboard port, PS/2 mouse
port, and Ball Point Quick Port.
o Memory
Standard RAM:
Cache memory:
BIOS ROM:
Video RAM:
4MB
8 KB (inside CPU)
128 KB (96 KB are used)
This
ROM contains Initial Reliability Test (IRT), Basic
Input/Output System (BIOS), and video BIOS.
256KB
Optional memory cards expand memory to a maximum of 20 MB.
o VGA display controller
The controller controls the internal and external VGA-compatible display.
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1-6
o Clock Generator receives 14.31818 MHz (Xl) and generates the following
frequencies:
• 20 MHz for the CPU
• 14.7456
MHz for the COM
•
24 MHz for the FOC and VFO
• 16 MHz is used for GA
• 14.31818 MHz is used for T9901 (SI)
o Gate Array
System Controller Gate Array
This gate array
has the following functions:
• Memory Controller
-DRAM Controller
-CPU Controller
-Compatible Bus Interface Controller
• Bus Controller
-Compatible Bus Interface Controller
-Compatible Access Controller
-
DMAC Controller
- 110 Controller
• Address Latch Controller
-32-Bit to 16-Bit Controller
-Address Latch
-DMA Address Generator
-Refresh Address Generator
• 110 Register
-Compatible
110 Port
-Saving the data
of the Register (in resume) Controller
-Toshiba Special Register
• 20 MHz/10 MHz Controller
• Data Bus Change Controller
• DataLatch
PCMCIA Gate Array
This gate array
has the following functions:
• Memory Card Controller
-PCMCIA IC Card Controller
-Toshiba Modem Card Controller

1.3 3.5-inch Floppy Disk Drive
The T1900ff1900C 3.S-inch Floppy Disk Drive (FDD) is a thin, high-perfonnance reliable
drive that supports 720 KB (formatted) 2DD and 1.44 MB (formatted) 2HD 3.S-inch floppy
disks.
The T1900ff1900C 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 2MBMode
1 MBMode
Storage capacity (KB)
Unformatted 2,000 1,000
Formatted
1,311
737
Number of heads 2 2
Number of cylinders 80 80
Access time (rna)
Trackto 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 DiskDrive (HOD) is a random access, non-volatile storage device. It has a non-
removable 2.5-inch magnetic disk and mini-winchester type magnetic heads.
T1900ff1900C supports 80, 120, and 200 MB hard disk drives.
The T1900ff1900C
HDD is shown in Figure 1-5, and its specifications are described in Table
1-2.
Figure 1-5 2.5-inch HDD
Table 1-2 2.5-inch HDD Specifications
SOMB 120MB
200MB
Item (CP2084) (MK1422FCV) (CP2124) (MK2124FC) (MK2224FC)
Stora~ capac:!}, (MB)
ormatte 85.2 86.0 121.6 130.1 213.0
Number of disks 2 1 2 2 2
Data heads 4 2 4 4 4
Data surfaces 4 2 4 4 4
Tracks
per surface 1,096 1,501 1,123 1,155 1,560
Sectors per track
38(+1)
56(+1)
53 (+1) 55(+1)
-
Bytes per sector 512 512 512 512 512
Access time (ms)
Track
to track
10 3 10 5 3
Average
19
15
17 17
12
Maximum
40
25
35 36
25
Rotation speed (rpm) 3,486 3,600 3,743 3,200 4,000
Data transfer rate (bps)
ToIfrom media
12M 17.6M
IBM 15.3M 18.9 to
31.6 M
Interleave 1
:1 1 :1 1 :1 1 :1
1 :1
Recording method 2-7RLU 1-7 RLL
2-7 RLU 1-7 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 TI900/T1900C's 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.
See Appendix F for optional keyboard configurations.
Figure 1-6 Keyboard
1-9

1.6 Sidelit Liquid Crystal Display (T1900)
The sidellt Liquid Crystal Display (LCD) is composed of an LCD module, aFluorescent Lamp
(FL), and an FL inverter board.
1.6.1 LCD Module (T1900)
The T 1900 sidellt LCD supports 64Ox480 pixels with a High Resolution Graphics Subsystem
(HRGS) and 64 levels of gray. The HRGS 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 sidellt
LCD is shown in Figure 1-7, and its specifications are described in Table 1-3.
Figure 1-7 Sidelit LCD
Table 1-3 Sidelit LCDSpecifications
Item Specifications
Number of Dots (clots) 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 (rnA) 5.0
FL frequency (KHz) 42
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