United States     April 15, 1999
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Maintenance & Service Guide
Presario 1900 Series
Models: 1905, 1906, 1910, 1915, 1919, 1920, 1922, and 1925

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Illustrated Parts Catalog
Removal & Replacement Procedures  | Specifications
Pin Assignments
| Battery Pack Operations


System I/O Address

I/O Address System Function (Shipping Configuration)
0000 – 000F Direct Memory Access Controller
0020 – 0021 Programmable interrupt controller
0040 – 0043 System timer
0060 – 0060 Standard 101/102-Key or Microsoft Natural Keyboard
0061 – 0061 System speaker
0064 – 0064 Standard 101/102-Key or Microsoft Natural Keyboard
0070 – 0071 System CMOS/real time clock
0081 – 008F Direct memory access controller
00A0 – 00A1 Programmable interrupt controller
00C0 – 00DF Direct memory access controller
00E0 – 00E1 Motherboard Resources
00F0 – 00FF Numeric Data Processor
0170 – 0177 Intel 82371AB/EB PCI Bus Master IDE Controller
01F0 – 01F7 Intel 82371AB/EB PCI Bus Master IDE Controller
0201 – 0201 Gameport Joystick
0274 – 0277 IO read data port for ISA Plug and Play enumerator
0376 – 0376 Intel 82371AB/EB PCI Bus Master IDE Controller
0378 – 037F Printer Port (LPT1)
03B0 – 03BB NeoMagic NMG5 Graphics Controller
03C0 – 03DF NeoMagic NMG5 Graphics Controller
03F0 – 03F5 Standard Floppy Disk Controller
03F6 – 03F6 Intel 82371AB/EB PCI Bus Master IDE Controller
03F7 – 03F7 Standard Floppy Disk Controller
03F8 – 03FF Communications Port (COM1)
03D0 – 04D1 Motherboard resources
0CF8 – 0CFF PCI bus
1000 – 103F Motherboard resources
1040 – 104F Motherboard resources
1050 – 105F Intel 82371AB/EB PCI Bus Master IDE Controller
1060 – 107F Intel 82371AB/EB PCI to USB Universal Host Controller
1080 – 10FF PCI Fast Ethernet DEC 21143 Based Adapter
1400 – 14FF PCI Communication Device
1800 – 1807 PCI Communication Device

 

System Memory Catalog

 

Memory Address Device
00000000 – 0009FFFF System board extension for PnP BIOS
000A0000 – 000AFFFF NeoMagic NMG5 Graphics Controller
000B0000 – 000BFFFF NeoMagic NMG5 Graphics Controller
000C0000 – 000CBFFF NeoMagic NMG5 Graphics Controller
000E4000 – 000FFFFF System board extension for PnP BIOS
00100000 – 03FFFFFF System board extension for PnP BIOS
04000000 – 04000FFF Texas Instruments PCI-1225 CardBus Controller
04001000 – 04001FFF Texas Instruments PCI-1225 CardBus Controller
F4000000 – F40000FF PCI Communication Device
F4000400 – F40007FF PCI Fast Ethernet DEC 21143 Based Adapter
F4100000 – F41FFFFF NeoMagic NMG5 Graphics Controller
F4100000 – F47FFFFF Intel 82443BX Pentium(r) II Processor to AGP controller
F4200000 – F42FFFFF PCI Multimedia Audio Device
F4400000 – F47FFFFF NeoMagic NMG5 Graphics Controller
F4C00000 – F4FFFFFF PCI Multimedia Audio Device
F4C00000 – F5FFFFFF Intel 82443BX Pentium(r) II Processor to AGP controller
F5000000 – F5FFFFFF NeoMagic NMG5 Graphics Controller
F8000000 – FBFFFFFF Intel 82443BX Pentium(r) II Processor to PCI bridge (with GART support)
FFF80000 – FFFFFFFF Motherboard resources

Display Information

12.1" TFT Display

  U.S. Metric

12.1" TFT Dimensions

Height
Depth
Width



1.1"
11.6"
9.2"


234mm
294.7mm
29mm

13.3" TFT Dimensions


Height
Depth
Width


1.2"
11.6"
9.2"

 


234mm
294.7mm
30.5mm

Memory Expansion (Not Applicable in this Form Factor)

 

Diskette Drive or LS-120 Drive

Storage Drives

 

3.5" Drive

LS-120 Drive

Capacity per Diskette (High/Low) Low   720KB
High  1.44MB
Low  720KB
High  120MB
Diskette Size

3.5"

3.5"
Number of LED Indicators (Read/Write) 1 1
Number of Drives Supported 1 1
Drive Rotation (rpm) 360 720
Transfer Rate (Kbps/Sec) Low    31
High   62
Low    313-565
High    313-565
Bytes per Sector 512 512
Sectors per Track (High/Low) Low    9
High   18
Low    9
High    93
Access Times


Track-to-Track (ms)
Head Setting (ms)


3ms
15ms


25ms (1 cycle seek)
20ms (1 cycle seek)

Cylinders (High/Low) Not Available Low     80
High     1736
Number of Read/Write Heads 2 2

Hard Drive

Hard Drives

Models DBCA-20648 DBCA-206480 DCXA-21000
Capacity Per Drive 4.8-GB 6.4-GB 10.0-GB
Drive Type U-DMA/33 U-DMA/33 U-DMA/33
Logical Configuration

Cylinders
Heads
Sectors per Track
Bytes per Sector

 

10068
3
63
512

 

13424
4
63
512

 

16383
6
63
512

Seek Times

(Typical, including settling in ms)

Single Track


Full Stroke

 

Read    13ms
Write   14ms

Read    2.5ms
Write    3.0ms

Read    23ms
Write    24ms

 

Read    13ms
Write   14ms

Read    2.5ms
Write    3.0ms

Read    23ms
Write    24ms

 

Read    12ms
Write   14ms

Read    2.5ms
Write    3.0ms

Read    23ms
Write    24ms

Transfer Rate
At interface
16.6MB/s 16.6MB/s 16.6MB/s

Hard Drives, continued

Models MHH20 48AT MHH20 64AT MHG2 102AT
Capacity Per Drive 4.8-GB 6.4-GB 10.0-GB
Drive Type U-DMA/33 U-DMA/33 U-DMA/33
Logical Configuration

Cylinders
Heads
Sectors per Track
Bytes per Sector

 

Not Available
Not Available
Not Available
Not Available

 

13424
4
63
512

 

16383
6
63
512

Seek Times

(Typical, including settling in ms)

Single Track


Full Stroke

 

Read    N/A
Write    N/A

Read    N/A
Write    N/A

Read    N/A
Write    N/A

 

Read   13ms
Write   14ms

Read    2.5ms
Write    3.0ms

Read    23ms
Write    24ms

 

Read   13ms
Write   N/A

Read    1.5ms
Write    N/A

Read    23ms
Write   N/A

Transfer Rate
At interface
15.8MB/s 16.6MB/s 15.8MB/s

Hard Drives, continued

Models DK238 A-43 DK228 A-65 DK239 A-65
Capacity Per Drive 4.3-GB 6.4-GB (12.7mm) 6.4-GB
Drive Type U-DMA/33
Logical Configuration

Cylinders
Heads
Sectors per Track
Bytes per Sector

 

Not Available
Not Available
Not Available
Not Available

 

13424
4
63
512

 

16383
6
63
512

Seek Times

(Typical, including settling in ms)

Single Track


Full Stroke

 

Read    N/A
Write    N/A

Read    N/A
Write    N/A

Read    N/A
Write    N/A

 

Read
Write

 

Read  
Write   N/A

Read   
Write    N/A

Read   
Write   N/A

Transfer Rate
At interface

CD ROM or DVD Drive

 

CD ROM Drive (24X) DVD Drive (4X)
Models CRN-8142B CDR-U242Z DRD-424 SD-C2202
Dimensions

Width
Height
Depth

 

128mm
12.7mm
129mm

 

Not Available
Not Available
Not Available

 

128mm
12.7mm
129mm

 

128mm
12.7mm
129mm

Weight 300g Not Available 280g 270g
Rotational Speed 5000RPM Not Available 2300 RPM 2300RPM
Typical Transfer Rate
Sustained Data Transfer Rate
16.67MB/s
3600KB/s
Not Available
Not Available
16.6MB/s(PIO)
5400KB/s
16.7MB/s(PIO)
5400KB/s
Access Time
Average Random Access Time

110ms

Not Available

150ms

140ms
Spin Up Time 5s Not Available <15s*1 3.8s
Data Buffer Capacity 1Mbit Not Available 128KB 128KB

 

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