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IBM PC 300GL manual Appendix B. System address maps, System memory map

Models: PC 300GL

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Appendix B. System address maps

Appendix B. System address maps

The following charts represent how the hard disk stores different types of information. Address ranges and byte sizes are approximate.

System memory map

The first 640 KB of system board RAM is mapped starting at address hex 0000000. A 256 byte area and a 1 KB area of this RAM are reserved for BIOS data areas. Memory can be mapped differently if POST detects an error.

Table 32. System memory map

	Address range	Address range (hex)	Size	Description
	(decimal)	Address range (hex)	Size	Description
	(decimal)

	0–512 KB	00000–7FFFF	512 KB	Conventional

	512–639 KB	80000–9FBFF	127 KB	Extended conventional

	639–640 KB	9FC00–9FFFF	1 KB	Extended BIOS data

	640–767 KB	A0000–BFFFF	128 KB	Dynamic video memory display
				cache

	768–800 KB	C0000–C7FFFF	32 KB	Video ROM BIOS (shadowed)

	800–896 KB	C8000–DFFFF	96 KB	PCI space, available to adapter
				ROMs

	896 KB–1 MB	E0000–FFFFF	128 KB	System ROM BIOS (main memory
				shadowed)

	1–16 MB	100000–FFFFFF	15 MB	PCI space

	16–4096 MB	1000000–FFDFFFF	4080 MB	PCI space (positive decode)

	4096–4120 MB	FFFE0000–FFFFFFFF	128 KB	System ROM BIOS

© Copyright IBM Corp. 2000

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IBM PC 300GL manual Appendix B. System address maps, System memory map

Contents

hcchM mlmiM mlni hcc mlml hcchM mlmiM mlni hcc mlml Second Edition March Contents Page Hardware Maintenance Manual PrefaceRelated publications Network Administrator’s GuideTerminology Features Chapter 1. System OverviewCD-RW DVD-ROMWake on Ring ADSL modemsWake on LAN Chapter 1. System Overview4 PC 300 GL and 300 PL L2 Cache Chapter 2. System board featuresIntel Pentium III microprocessor with MMX technology Chip set controlMem O Table. 1. Memory Configuration MBTotal Memory 6 PC 300 GL and 300 PLPCI Bus IDE bus master interfaceUSB interface Video Subsystem Table 2. Video subsystem resources ResourceAssignment Audio Subsystem 10 PC 300 GL and 300 PLIntegrated peripheral controller Diskette Drive InterfaceSerial ports Parallel port Keyboard and mouse ports12 PC 300 GL and 300 PL Flash EEPROM Network connectionReal-time clock and CMOS Expansion adaptersPhysical layout Rocker switches speed Table 6. Large rocker switch settingsMicroprocessor 16 PC 300 GL and 300 PLTable 6. Large rocker switch settings Cable connectorsConnector panel Table 7. Small rocker switch settings18 PC 300 GL and 300 PL SerialSVGA Monitor Mouse Keyboard USB Chapter 2. System board featuresSerial Serial USB Line In Headphone Line Out Microphone Parallel SVGA Monitor20 PC 300 GL and 300 PL Chapter 3. Physical specifications PC 300 GL and PL desktopPC300 PL and GL tower 22 PC 300 GL and 300 PLAirflow Chapter 3. Physical specificationsHeat output Acoustical noise-emission values24 PC 300 GL and 300 PL Chapter 4. Power supply Power inputPower output Component outputs 26 PC 300 GL and 300 PLConnector description Output protectionChapter 4. Power supply 28 PC 300 GL and 300 PL Plug and Play BIOSChapter 5. System software POSTAdvanced Configuration and Power Interface ACPI Configuration/Setup Utility programAdvanced Power Management APM Flash update utility programChapter 6. System compatibility Hardware compatibilityHardware interrupts Software compatibility Software interruptsMachine-sensitive programs Appendix A. Connector pin assignments SVGA monitor connectorDVI-I monitor connector System memory connector34 PC 300 GL and 300 PL x64 nonparity Table 20. System memory connector pin assignmentsAppendix A. Connector pin assignments x72 ECCx72 ECC Table 20. System memory connector pin assignmentsx64 nonparity x64 nonparityTable 20. System memory connector pin assignments Signal name Table 21. System memory connector pin input/outputSignal name 38 PC 300 GL and 300 PLTable 21. System memory connector pin input/output Signal nameSignal name PCI connectors 40 PC 300 GL and 300 PLTable 22. PCI connector pin assignments SignalSignal IDE connectors 42 PC 300 GL and 300 PLSignal Diskette drive connectorTable 24. Diskette drive connector pin assignments SignalUSB port connectors Power supply connectorWake on LAN connectors 44 PC 300 GL and 300 PLMouse and keyboard port connectors Serial port connectorParallel port connector 46 PC 300 GL and 300 PLAppendix B. System address maps System memory mapInput/output address map 48 PC 300 GL and 300 PLSize Table 33. I/O address mapAddress hex DescriptionDMA I/O address map 50 PC 300 GL and 300 PLPCI configuration space map 52 PC 300 GL and 300 PL Appendix C. IRQ and DMA channel assignments Table 36. IRQ channel assignmentsSystem resource Data width Table 37. DMA channel assignmentsDMA channel System resourceAppendix D. Error codes POST error codesBeep codes 56 PC 300 GL and 300 PL Appendix E. Notices and Trademarks IBM Director of Licensing IBM Corporation North Castle DriveArmonk, NY U.S.A 58 PC 300 GL and 300 PL Bibliography Extended Capabilities Port Specification KitPCI BIOS Specification 2.0, Source PCI Special Interest Group 60 PC 300 GL and 300 PL Index A