82845G Datasheet, PDF (7/193 Pages) Intel Corporation – Intel 82845G/82845GL/82845GV Graphics and Memory Controller Hub (GMCH)

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System Address ................................................................................................139
5.1 System Memory Address Ranges ...............................................................139
5.1.1 Compatibility Area...........................................................................141
5.1.2 Extended Memory Area ..................................................................143
5.1.2.1 15 MB–16 MB Window ....................................................143
5.1.2.2 Pre-Allocated Memory .....................................................143
5.1.3 AGP Memory Address Ranges.......................................................146
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Electrical Characteristics ..............................................................................147
6.1 Absolute Maximum Ratings .........................................................................147
6.2 Thermal Characteristics ...............................................................................147
6.3 Power Characteristics ..................................................................................148
6.4 Signal Groups ..............................................................................................148
6.5 DC Parameters ............................................................................................150
6.6 DAC Characteristics.....................................................................................153
6.6.1 DAC DC Characteristics .................................................................153
6.6.2 DAC Reference and Output Specifications.....................................154
6.6.3 DAC AC Characteristics..................................................................154
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Ballout and Package Information...............................................................155
7.1 Intel^® 82845G GMCH Ballout ......................................................................155
7.2 Package Information ....................................................................................170
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Testability............................................................................................................. 173
8.1 XOR Test Mode Initialization .......................................................................173
8.2 XOR Chain Definition...................................................................................173
8.3 XOR Chains Excluded Pins .........................................................................180
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Intel^® 82845GL/82845GV GMCH .................................................................181
9.1 Processor System Bus (PSB) Frequency ....................................................181
9.2 No AGP Interface.........................................................................................182
9.3 Intel^® 82845G and Intel^® 82845GL/82845GV Signal Differences ...............182
9.3.1 Functional Straps (82845GL only) ..................................................182
9.4 Intel^® 82845G and Intel^® 82845GL/82845GV Register Differences............183
9.4.1 DRAM Controller/Host-Hub Interface Device Registers (Device 0) 183
9.4.1.1 Device 0 Registers Not in 82845GL/82845GV ................183
9.4.1.2 Device 0 Register Bit Differences....................................184
9.4.2 Host-to-AGP Bridge Registers (Device 1).......................................186
9.5 Synchronous Display Differences ................................................................186
9.6 Intel^® 82845GL\82845GV GMCH Ballout ....................................................186
Intel^® 82845G/82845GL/82845GV GMCH Datasheet
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