Theory of Operation
4-17
♦
16 bit addressing (full programmable)
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10 selectable IRQs
♦
4 selectable DMA Channels
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3 SIRQ Inputs allows external devices to mapping IRQs
♦
100-pin TQFP package - PC87338VJG
4.2.8 Hard Disk Drive Subsystem
The Hard Disk Drive Subsystem, implemented on the Main Board Board and on the
associated hard disk drive module(s), provides disk storage for all system software and
user files.
The notebook is equipped with a high-capacity hard disk drive. The hard disk drive also
features built-in power conservation features configured from the standard CMOS
Setup Routine. An Automatic Power Down mode can be selected which powers down
the drive motor during periods of inactivity. An additional level of power conservation
may also be selected which powers down the motor plus all control circuits.
The hard disk drives are factory formatted as a single drive (Drive C:) and are preloaded
with installation versions of Windows 95 or Windows for Workgroups (in dual load
versions, the user selects operating system during software installation).
The Hard Disk Controller is implemented with the PCIO643 Controller Chip described
in greater detail in the following paragraph.
4.2.8.1 PCI0643 Features
♦
Capable of 16 MB/second transfer rates in DMA mode - up to 20 MB/second
in PIO mode
♦
Supports bus master DMA at 133 MB/second PCI burst rate
♦
Support PCI DMA transfers for both DMA-capable and PIO-only drives
♦
Fully supports ATAPI DMA/PIO transfers
♦
2 channels - supports up to 4 IDE drives
♦
Surpasses and supports Enhanced IDE Mode 3, Mode 4 and propose Mode 5
timing from the widest range of disk drive manufacturers
♦
Supports multi-word and single-word DMA modes 0, 1 and 2
♦
Fully supports the latest PCI-IDE specification and all the Plug-and-Play (PnP)
specifications.
♦
Supports Windows 95, Windows NT 3.1 and 3.5 (Daytona), and OS/2™
Summary of Contents for Extensa 900 Series
Page 1: ...Maintenance Manual ExtensaTM 900 Series Notebook Computers 9813715 0001 December 1996 ...
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Page 138: ...A 2 Notebook Schematic Diagrams Figure A 1 Notebook Main Board Logic Diagrams Sheet 1 of 30 ...
Page 139: ...Notebook Schematic Diagrams A 3 Figure A 1 Notebook Main Board Logic Diagrams Sheet 2 of 30 ...
Page 140: ...A 4 Notebook Schematic Diagrams Figure A 1 Notebook Main Board Logic Diagrams Sheet 3 of 30 ...
Page 141: ...Notebook Schematic Diagrams A 5 Figure A 1 Notebook Main Board Logic Diagrams Sheet 4 of 30 ...
Page 142: ...A 6 Notebook Schematic Diagrams Figure A 1 Notebook Main Board Logic Diagrams Sheet 5 of 30 ...
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Page 146: ...A 10 Notebook Schematic Diagrams Figure A 1 Notebook Main Board Logic Diagrams Sheet 9 of 30 ...
Page 147: ...Notebook Schematic Diagrams A 11 Figure A 1 Notebook Main Board Logic Diagrams Sheet 10 of 30 ...
Page 148: ...A 12 Notebook Schematic Diagrams Figure A 1 Motherboard PWB Logic Diagrams Sheet 11 of 23 ...
Page 149: ...Notebook Schematic Diagrams A 13 Figure A 1 Notebook Main Board Logic Diagrams Sheet 12 of 30 ...
Page 153: ...Notebook Schematic Diagrams A 17 Figure A 1 Notebook Main Board Logic Diagrams Sheet 16 of 30 ...
Page 154: ...A 18 Notebook Schematic Diagrams Figure A 1 Notebook Main Board Logic Diagrams Sheet 17 of 30 ...
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Page 171: ...MPB Schematic Diagrams B 3 Figure B 1 MPB CPU Board Logic Diagrams Sheet 2 of 3 ...
Page 176: ...B 8 MPB Schematic Diagrams Figure B 3 MPB Main Board Motherboard Logic Diagrams Sheet 3 of 10 ...
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