Dell 200, 4100, 180 service manual DMA Channel Assignments, Dreq Line Assignments

Page 25

 

Table 1-3. Interrupt Assignments (continued)

 

 

IRQ Line

Used/Available

 

 

IRQ10

Available for use by expansion card

IRQ11

Available for use by expansion card

IRQ12

Generated by keyboard controller to indicate that mouse’s output

 

buffer is full

IRQ13

Generated by math coprocessor to indicate coprocessor error

IRQ14

Available for use by expansion card

IRQ15

Available for use by expansion card

 

 

DMA Channel Assignments

 

Table 1-4. DREQ Line Assignments

 

 

DREQ Line

Used/Available

 

 

DREQ0

Available

DREQ1

Available

DREQ2

Generated by super I/O controller to initiate DMA cycle for

 

attached diskette drive

DREQ3

Available

DREQ4

Generated by bus controller chip to activate second DMA

 

controller

DREQ5

Available

DREQ6

Available

DREQ7

Available

 

 

System Overview 1-23

Image 25
Contents Dell PowerEdge 4100/180 and 4100/200 Systems Page System Overview System FeaturesPage Computer Orientation Front-Panel Features Front/Left Internal View Back/Right Internal View I/O Panel Advanced Expansion Subsystem System MemoryIntegrated Server Management Video Controller Scsi Configuration GuidelinesIntegrated Scsi Controllers Scsi Hard-Disk DrivesScsi ID Numbers System Unit System Power SupplyDC Voltage Ranges Power Supply Connectors DC Power Connector J11 P1 DC Power Connectors J12 P2, J13 P3, and J14 P4 Ddbp 12. Power-Supply Paralleling Board Connectors 13. DC Power Connector PWR1 15. DC Power Connector Pwrscsi Ddbp DC Power Distribution Redundant System 18. System Board Components System Board LayoutMain Memory Jumper Descriptions Interrupt AssignmentsInterrupt Assignments Dreq Line Assignments DMA Channel AssignmentsTechnical Specifications Technical SpecificationsSystem Clocks CD-ROM Power Technical Specifications Initial User Contact Basic TroubleshootingExternal Visual Inspection Observing the Boot Routine Internal Visual Inspection Eliminating Resource Conflicts Running the System DiagnosticsGetting Help Beep Codes Post Beep CodesBeep Codes System Error Messages System Error MessagesReal-time clock on Defective micro Wrong microprocessor Replace microprocessor Page Recommended Tools Removing and Replacing PartsComputer Covers Precautionary MeasuresKeylocks on Computer’s Back Panel Front Bezel Removal Front BezelDrive Hardware DrivesFront-Panel Insert Removal Front-Panel InsertsExternally Accessible Drives Removal Externally Accessible DrivesDrive-Mounting Rails Removal Hard-Disk Drive Carrier Removal Hard-Disk DrivesHard-Disk Drive Removal 10. Scsi Backplane Board Removal Scsi Backplane Board11. Power Supply Removal Power Supply12. Power-Supply Paralleling Board Removal Redundant Systems Power-Supply Paralleling Board13. Power Connector Panel Removal Nonredundant Systems Power Connector Panel14. Control Panel Removal Control Panel15. Cooling Fan Removal Cooling Fans16. System Board Components System Board Components17. Expansion Card Removal Expansion Cards18. Dimm Removal DIMMsMicroprocessor and Heat Sink 20. Microprocessor Configuration21. Microprocessor Securing Clip 23. Pin-1 Identification 24. System Battery Removal System Battery25. System Board Removal System BoardScreen Conventions System Setup ScreensTable A-1. Key Functions Key FunctionsMain Menu Screen Color CombinationsTable A-2. Main Menu Categories Post Boot Options SubmenuFigure A-3. Advanced Menu Advanced MenuTable A-4. Advanced Menu Categories Figure A-4. Security Menu Security MenuUser’s Guide Table A-5. Security Menu CategoriesFigure A-5. Exit Menu Exit MenuTable A-6. Exit Menu Categories Page Index Dreq line assignments Scsi Key functions, A-2main menu, A-3menus, A-1
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