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HP 550 HP 550 Notebook PC - Maintenance and Service Guide - Page 103

System memory map specifications, Memory address, System function

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System memory map specifications Size 640 KB 128 KB 48 KB 160 KB 64 KB 15 MB 58 MB 58 MB 2 MB 4 GB 64 KB Memory address 00000000-0009FFFF 000A0000-000BFFFF 000C0000-000CBFFF 000C8000-000E7FFF 000E8000-000FFFFF 00100000-00FFFFFF 04800000-07FFFFFF 04800000-07FFFFFF 08000000-080FFFFF 08200000-FFFEFFFF FFFF0000-FFFFFFFF System function Base memory Video memory Video BIOS Unused System BIOS Extended memory Super extended memory Unused Video memory (direct access) Unused System BIOS System memory map specifications 95

Section	Page
Product description	9
External component identification	14
Top components	14
TouchPad	14
Buttons, lights, and speaker	15
Keys	16
Front components	17
Right-side components	18
Left-side components	19
Bottom components	20
Wireless antennae (select models only)	21
Illustrated parts catalog	22
Serial number location	22
Computer major components	23
Plastics Kit	29
Cable Kit	30
Mass storage devices	31
Miscellaneous parts	32
Sequential part number listing	33
Removal and replacement procedures	38
Preliminary replacement requirements	38
Tools required	38
Service considerations	38
Plastic parts	38
Cables and connectors	39
Drive handling	39
Grounding guidelines	40
Electrostatic discharge damage	40
Packaging and transporting guidelines	41
Workstation guidelines	41
Equipment guidelines	42
Unknown user password	43
Component replacement procedures	44
Serial number	44
Computer feet	45
Battery	46
Hard drive	47
WLAN module	49
Memory module	52
Optical drive	53
Switch cover	54
Keyboard	57
Speaker	60
Display lid switch module	61
Display assembly	62
Top cover	67
TouchPad board and TouchPad button board	70
Bluetooth module	72
System board	73
Fan	77
Heat sink	79
Processor	81
Modem module	83
RTC battery	85
ExpressCard assembly	86
Computer Setup	88
Starting Computer Setup	88
Using Computer Setup	89
Navigating and selecting in Computer Setup	89
Restoring factory settings in Computer Setup	89
Computer Setup menus	90
File menu	90
Security menu	91
Diagnostics menu	91
System Configuration menu	92
Specifications	94
Computer specifications	94
15.4-inch, WXGA display specifications	95
Hard drive specifications	96
DVD±RW and CD-RW Double-Layer Combo Drive specifications	97
DVD/CD-RW Combo Drive specifications	98
System DMA specifications	99
System interrupt specifications	100
System I/O address specifications	101
System memory map specifications	103
Screw listing	104
Phillips PM2.0×5.0 captive screw	105
Phillips PM2.5×12.0 captive screw	106
Phillips PM3.0×4.0 screw	107
Phillips PM2.5×4.0 screw	108
Slotted Torx ST8M2.5×7.0 screw	109
Phillips PM2.0×4.0 screw	111
Torx T8M2.5×9.0 screw	113
Torx T8M2.5×3.0 broad-head screw	114
Torx T8M2.5×4.0 screw	115
Phillips PM2.0×2.0 broad-head screw	117
Torx T8M2.5×6.0 screw	118
Phillips PM2.0×6.0 screw	119
Torx T8M2.0×4.0 screw	120
Phillips PM2.5×7.0 screw	121
Phillips PM2.5×7.0 captive screw	122
Phillips PM2.5×10.0 captive screw	123
Phillips PM2.0×8.0 screw	124
Backup and recovery	125
Backup and recovery in Windows Vista	126
Overview	126
Backing up your information	126
Performing a recovery	127
Using the Windows recovery tools	127
Using f11	128
Using a Windows Vista operating system DVD (purchased separately)	128
Backup and Recovery in Windows XP	130
Overview	130
Backing up your information	130
Performing a recovery	131
Recovering your information	131
Recovering the operating system and programs	131
Connector pin assignments	132
Audio-out (headphone)	132
Audio-in (microphone)	132
External monitor	133
RJ-11 (modem)	134
RJ-45 (network)	135
Universal Serial Bus	135
Power cord set requirements	136
Requirements for all countries and regions	136
Requirements for specific countries and regions	137
Recycling	138
Battery	138
Display	138