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Maintenance & Service Guide
Presario 1800 Series
Models: 1825 and 1800T

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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

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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