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Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T
| Home Page | Notice | Preface | Product Description | Troubleshooting
Illustrated Parts Catalog | Removal & Replacement Procedures | Specifications
Pin Assignments | Battery Pack Operations
Specifications
This section covers the following specifications of Compaq Presario 1800 Series Portable
Computers:
● Physical and Environmental
● System Interrupts
● System DMA
● System I/O Address
● System Memory Catalog
● Display
● Memory Expansion
● Diskette or LS120 Drive
● Hard Drive
● DVD or CD drive
● Battery Pack
Physical and Environmental
Computer Specifications
U.S. Metric
Dimensions
Height
Depth
Width
1.65 in
13.00 in
10.99 in
4.20 cm
33.00 cm
27.90 cm
Weight
7.9 lbs 3.58 kg
Stand-Alone (Battery Pack) Power
Requirements
Nominal Operating
Maximum Average
Peak Operating
Li-ion 3.2 mAh
W @ 14.8 V
W @ 14.8 V
W @ 14.8 V
AC Power Requirements
Operating Voltage
Operating Current
Operating Frequency
Maximum Transient
100-240 V
0.8/0.4 A RMS
47-63 Hz
Meets IEC 801-4 and IEC801-5
1kV for 50 ns
Temperature
Operating
Nonoperating
50° to 95 °F
-4° to 140 °F
10° to 35 °C
-20° to 60 °C
Relative Humidity (noncondensing)
Operating
Nonoperating (tw = 38.7°C max)
90%
5% to 95%
10% to 90%
5% to 95%
Altitude
Operating
Nonoperating
0 to 10,000 ft
0 to 30,000 ft
0 to 3.05 km
0 to 9.14 km
Shock
Operating
Non operating
10 G, 11 ms, half sine
240 G, 2 ms, half sine
Vibration
Operating
Nonoperating
0.5 G
1.5 G
NOTE: Applicable product safety standards specify thermal limits for plastic surfaces. Compaq Explorer
Series Portable Computers operate well within this range of temperatures.
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System Interrupts
System Interrupts
Hardware IRQ System Function
IRQ0 System timer
IRQ1 Standard 101/102-key or Microsoft Natural Keyboard
IRQ2 Programmable interrupt controller
IRQ3 Lucent 56K V.90 PCI DF Modem
IRQ4 Communications Port (COM1)
IRQ5 ESS SOLO-1 PCI AudioDrive
IRQ5 RAGE LT PRO AGP 2X (English)
IRQ6 Standard Floppy Disk Controller
IRQ7 Printer Port (LPT1)
IRQ8 System CMOS/real time clock
IRQ9 Available
IRQ10 Available
IRQ11 Intel 21143/2 based 10/100 mbps Ethernet Controller
IRQ11 Texas Instruments PCI-1211 CardBus Controller
IRQ11 Intel 82371AB/EB PCI to USB Universal Host Controller
IRQ12 Synaptics PS/2 TouchPad
IRQ13 Numeric Data Processor
IRQ14 Intel 82371AB/EB PCI Bus Master Primary IDE Controller
IRQ15 Intel 82371AB/EB PCI Bus Master Secondary IDE Controller
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System DMA
System DMA
Hardware DMA System Function
DMA 1 ESS SOLO-1 DOS Emulation
DMA 2 Standard Floppy Disk Controller
DMA 3 ECP Printer Port (LPT1)
DMA 4 Direct memory access controller
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System I/O Address
System I/O Address
I/O Address (Hex) System Function (Shipping Configuration)
0000h-000Fh Direct memory access controller
0020h-0021h Programmable interrupt Controller`
0040h-0043h System timer
0060h-0060h
Standard 101/102-Key or Microsoft Natural
Keyboard
0061h-0061h System speaker
0064h-0064h
Standard 101/102-Key or Microsoft Natural
Keyboard
0070h-0071h System CMOS/real time clock
0072h-0073h Motherboard resources
0080h-0080h Motherboard resources
0081h-008Fh Direct memory controller
00A0h-00A1h Programmable interrupt controller
00C0h-00DFh Direct memory access Controller
00ECh-00EFh Motherboard resources
00F0h-00FFh Numeric data processor
0170h-0177h
Intel 82371AB/EB PCI Bus Master IDE
controller
0170h-0177h Secondary IDE controller (dual fifo)
01F0h-01F7h
Intel 82371AB/EB PCI Bus Master IDE
controller
01F0h-01F7h Primary IDE controller (dual fifo)
0200h-0203h Gameport Joystick
0220h-022Fh ESS SOLO-1 DOS Emulation
0330h-0331h ESS SOLO-1 DOS Emulation
0376h-0376h
Intel 82371AB/EB PCI Bus Master IDE
Controller
0376h-0376h Secondary IDE controller (dual fifo)
0378h-037Fh ECP Printer Port (LPT1)
0388h-038Bh ESS SOLO-1 DOS Emulation
03B0h-03BBh RAGE LT PRO AGP 2X (English)
03C0h-03Dfh RAGE LT PRO AGP 2X (English)
03E0h-03E1h Motherboard resources
03F0h-03F5h Standard Floppy Disk Controller
03F6h-03F6h
Intel 82371AB/EB PCI Bus Master IDE
Controller
03F6h-03F6h Primary IDE controller (dual fifo)
03F7h-03F7h Standard Floppy Disk Controller
03F8h-03FFh Communications Port (COM1)
04D0h-04D1h Motherboard resource
0CF8h-0CFFh PCI bus
2180h-218Fh Motherboard resources
8000h-803Fh Motherboard resources
E000h-EFFFh
Intel 82443BX Pentium ® II Processor to AGP
controller
E800h-E8FFh RAGE LT PRO AGP 2X (English)
F4D8h-F4DBh ESS SOLO-1 PCI AudioDrive
F4DCh-F4DFh ESS SOLO-1 PCI AudioDrive
F4E0h-F4Efh ESS SOLO-1 PCI AudioDrive
F4F0h-F4FFh ESS SOLO-1 PCI AudioDrive
F800h-F8FFh Lucent 56K V.90 PCI DF Modem
FC00h-FC7Fh
Intel 21143/2 based 10/100 mbps Ethernet
Controller
FC88h-FC8Fh Lucent 56K V.90 PCI DF Modem
FC90h-FC97h Primary IDE controller (dual fifo)
FC90h-FC9Fh
Intel 822371AB/EB PCI Bus Master IDE
Controller
FC98h-FC9F Secondary IDE controller (dual fifo)
FCA0h-FCBFh
Intel 82371AB/EB PCI to USB Universal Host
Controller
FCC0h-FCFFh ESS SOLO-1 PCI AudioDrive
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System Memory Catalog
System Memory Catalog
Memory Address System Function
00000000h-0009FFFFh System board extension for PnP BIOS
000A0000h-000AFFFFh RAGE LT PRO AGP 2X (English)
000B0000h-000BFFFFh RAGE LT PRO AGP 2X (English)
000C0000h-000CBFFFh RAGE LT PRO AGP 2X (English)
000E0000h-000E7FFFh Motherboard resources
000E8000h-000FFFFFh System board extension for PnP BIOS
00100000h-03FFFFFFh System board extension for PnP BIOS
08000000h-08000FFFh Texas Instruments PCI-1211 CardBus Controller
F8000000h-FBFFFFFFh Intel 82443BX Pentium ® ll Processor to PCI
bridge
FD000000h-FDFFFFFFh RAGE LT PRO AGP2X (English)
FD000000h-FECFFFFFh Intel 82443BX Pentium ® ll Processor to AGP
controller
FE000000h-FE01FFFFh RAGE LT PRO AGP 2X (English)
FECFE000h-FECFFFFh RAGE LT PRO AGP 2X (English)
FEDFF800h-FEDFFBFFh Intel 21143/2 based 10/100 mbps Ethernet
Controller
FEDFFC00h-FEDFFCFFh Lucent 56K V.90 PCI DF Modem
FFF80000h-FFFFFFFFh Motherboard resources
Display
15.0" (Diagonal) TFT Display with LVDS
U.S. Metric
Dimensions
Height
Width
9.48 in
12.43 in
24.05 cm
31.55 cm
Display Dimensions
Height
Width
Depth
8.99 in
11.98 in
Information not available
22.81 cm
30.41 cm
Information not
available
Weight
24.36 oz 690 gm
Contrast Ratio
150:1 mini
Brightness
120 cd/mm^3
Total Power Consumption
Information not available
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14.1" (Diagonal) TFT Display with LVDS
U.S. Metric
Dimensions
Height
Width
8.92 in
11.76 in
22.65 cm
29.85 cm
Display Dimensions
Height
Width
Depth
8.44 in
11.26 in
Information not
available
21.43 cm
28.57 cm
Information not
available
Weight 19.94 oz 565 gm
Contrast Ratio 150:1 mini
Brightness 120 cd/mm^3
Total Power Consumption Information not available
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Memory Expansion
Memory Expansion
System Memory Expansion Board
Memory
Total Memory
64-MB
64-MB
64-MB
32-MB 96-MB
64-MB
64-MB 128-MB
64-MB
128-MB 192-MB
Diskette or LS120 Drive
Diskette Drive LS120 Drive
Capacity per Diskette (High/Low)
1.44 MB/720KB 120 MB
Diskette Size
3.5" 3.5"
Number of LED Indicators (Read/Write)
0 1
Number of Drives Supported
1 1
Drive Rotation (rpm)
300 720
Transfer Rate (Kbps)
500 5458
Bytes per Sector
512 512
Sectors per Track (High/Low)
18/9
Tracks per Side (High/Low)
80
Access Times
Track-to-Track (ms)
Average (ms)
Setting Time (ms)
Latency Average (ms)
3
94
15
100
20
112
800
41.67
Cylinders (High/Low)
80 1736
Number of Read/Write Heads
2 2
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Hard Drive
Hard Drive
4.8-GB 6.4-GB 10.0-GB 18.0-GB
Capacity Per Drive
4.8-GB 6.4-GB 10.0-GB 18.0-GB
Drive Type
Logical Configuration
Cylinders
Heads
Sectors per track
Bytes per sector
11648
3
190/330
512
8647
4
190/330
512
11968
6
190/330
512
16383
6
Not available
512
Seek Times
(Typical, Including settling in ms)
Single track
Average
Full stroke
4
14
24
4
14
24
4
14
24
2.5 (Read)
12 (Read)
23 (Read)
Transfer Rate At Interface
33.3 MB/s 33.3 MB/s 33.3 MB/s 33.3 MB/s
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CD/DVD Drive
CD/DVD Drive
4x DVD 6x DVD 24x CD-ROM
Dimensions
128 x 129 x 12.7 mm 128 x 129 x 12.7mm 128 x 129 x 12.7 mm
Weight
0.27 kg 0.28 kg <0.27 kg
Rotational Speed
2300 rpm 3450 rpm 4225 rpm
Typical Transfer Rate
Sustained Data Transfer
Rate
5400 KB/s
8100 KB/s 3600 KB/s
Access Time
Average Random Access
Time
140 ms
140 ms 120 ms
Spin Up time
3.8 s <15 s 2.7 s
Data Buffer Capacity
128 KB 512 KB 128 KB
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Battery Pack
Battery Pack
Lithium Ion (Li ion) *
Dimensions
Height
Length
Width
0.8 in (20.3 mm)
5.7 in (145 mm)
3.1 in (78.7 mm)
Weight
0.90 lb (408.2 g)
Battery Pack Operating Time
2 hr 30 min*
Energy
Nominal Open Circuit Voltage
Capacity
Power
14.4 V
3200 mAH
46.1 WH
Environmental Requirements
Operating Temperature
Non-operating Temperature
Charging Temperature
32° F (0-50° C)
-20° C -60° C
5° C-45° C
*The battery operating time changes depending on your power management settings, system
components, options, and applications you use.
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