x86实模式Memory Map和Port Address Assignments

最新推荐文章于 2020-06-20 21:14:10 发布

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最新推荐文章于 2020-06-20 21:14:10 发布

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分类专栏：虚拟机文章标签： x86 network system parallel video ide

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本文详细介绍了x86架构下真实模式的内存布局及默认端口地址分配情况，包括中断向量表、BIOS数据区、视频RAM等内存区域的划分，以及DMA控制器、键盘、浮点单元等设备的端口地址范围。

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转自：http://hi.baidu.com/xshaonan/blog/item/443c8b091ff8bbc53bc763b7.html

General x86 Real Mode Memory Map:

0x00000000 - 0x000003FF - Real Mode Interrupt Vector Table
0x00000400 - 0x000004FF - BIOS Data Area
0x00000500 - 0x00007BFF - Unused
0x00007C00 - 0x00007DFF - Our Bootloader
0x00007E00 - 0x0009FFFF - Unused
0x000A0000 - 0x000BFFFF - Video RAM (VRAM) Memory
0x000B0000 - 0x000B7777 - Monochrome Video Memory
0x000B8000 - 0x000BFFFF - Color Video Memory
0x000C0000 - 0x000C7FFF - Video ROM BIOS
0x000C8000 - 0x000EFFFF - BIOS Shadow Area
0x000F0000 - 0x000FFFFF - System BIOS

Default x86 Port Address Assignments
Address Range	First QWORD	Second QWORD	Third QWORD	Fourth QWORD
0x000-0x00F	DMA Controller Channels 0-3
0x010-0x01F	System Use
0x020-0x02F	Interrupt Controller 1	System Use
0x030-0x03F	System Use
0x040-0x04F	System Timers	System Use
0x050-0x05F	System Use
0x060-0x06F	Keyboard/PS2 Moude (Port 0x60) Speaker (0x61)	Keyboard/PS2 Mouse (0x64)	System Use
0x070-0x07F	RTC/CMOS/NMI (0x70, 0x71)	DMA Controller Channels 0-3
0x080-0x08F	DMA Page Register 0-2 (0x81 - 0x83)	DMA Page Register 3 (0x87)	DMA Page Register 4-6 (0x89-0x8B)	DMA Page Register 7 (0x8F)
0x090-0x09F	System Use
0x0A0-0x0AF	Interrupt Controller 2 (0xA0-0xA1)	System Use
0x0B0-0x0BF	System Use
0x0C0-0x0CF	DMA Controller Channels 4-7 (0x0C0-0x0DF), bytes 1-16
0x0D0-0x0DF	DMA Controller Channels 4-7 (0x0C0-0x0DF), bytes 16-32
0x0E0-0x0EF	System Use
0x0F0-0x0FF	Floating Point Unit (FPU/NPU/Mah Copprocessor)
0x100-0x10F	System Use
0x110-0x11F	System Use
0x120-0x12F	System Use
0x130-0x13F	SCSI Host Adapter (0x130-0x14F), bytes 1-16
0x140-0x14F	SCSI Host Adapter (0x130-0x14F), bytes 17-32		SCSI Host Adapter (0x140-0x15F), bytes 1-16
0x150-0x15F	SCSI Host Adapter (0x140-0x15F), bytes 17-32
0x160-0x16F	System Use		Quaternary IDE Controller, master slave
0x170-0x17F	Secondary IDE Controller, Master drive		System Use
0x180-0x18F	System Use
0x190-0x19F	System Use
0x1A0-0x1AF	System Use
0x1B0-0x1BF	System Use
0x1C0-0x1CF	System Use
0x1D0-0x1DF	System Use
0x1E0-0x1EF	System Use		Tertiary IDE Controller, master slave
0x1F0-0x1FF	Primary IDE Controller, master slave		System Use
0x200-0x20F	Joystick Port		System Use
0x210-0x21F	System Use
0x220-0x22F
	Sound Card
	Non-NE2000 Network Card	System Use
0x230-0x23F	SCSI Host Adapter (0x220-0x23F), bytes 17-32)
0x240-0x24F
	Sound Card
	Non-NE2000 Network Card	System Use
	NE2000 Network Card (0x240-0x25F) Bytes 1-16
0x250-0x25F	NE2000 Network Card (0x240-0x25F) Bytes 17-32
0x260-0x26F
	Sound Card
	Non-NE2000 Network Card	System Use
	NE2000 Network Card (0x240-0x27F) Bytes 1-16
0x270-0x27F
	System Use	Plug and Play System Devices	LPT2 - Second Parallel Port
	System Use		LPT3 - Third Parallel Port (Monochrome Systems)
	NE2000 Network Card (0x260-0x27F) Bytes 17-32
0x280-0x28F
	Sound Card
	Non NE2000 Network Card	System Use
	NE2000 Network Card (0x280-0x29F) Bytes 1-16
0x290-0x29F	NE2000 Network Card (0x280-0x29F) Bytes 17-32
0x2A0-0x2AF
	Non NE2000 Network Card	System Use
	NE2000 Network Card (0x280-0x29F) Bytes 1-16
0x2B0-0x2BF	NE2000 Network Card (0x280-0x29F) Bytes 17-32
0x2C0-0x2CF	System Use
0x2D0-0x2DF	System Use
0x2E0-0x2EF	System Use		COM4 - Fourth Serial Port
0x2F0-0x2FF	System Use		COM2 - Second Serial Port
0x300-0x30F
	Sound Card / MIDI Port	System Use
	Non NE2000 Network Card	System Use
	NE2000 Network Card (0x300-0x31F) Bytes 1-16
0x310-0x31F	NE2000 Network Card (0x300-0x32F) Bytes 17-32
0x320-0x32F
	Sound Card / MIDI Port (0x330, 0x331)	System Use
	NE2000 Network Card (0x300-0x31F) Bytes 17-32
	SCSI Host Adapter (0x330-0x34F) Bytes 1-16
0x330-0x33F
	Sound Card / MIDI Port	System Use
	Non NE2000 Network Card	System Use
	NE2000 Network Card (0x300-0x31F) Bytes 1-16
0x340-0x34F
	SCSI Host Adapter (0x330-0x34F) Bytes 17-32
	SCSI Host Adapter (0x340-0x35F) Bytes 1-16
	Non NE2000 Network Card	System Use
	NE2000 Network Card (0x340-0x35F) Bytes 1-16
0x350-0x35F
	SCSI Host Adapter (0x340-0x35F) Bytes 17-32
	NE2000 Network Card (0x300-0x31F) Bytes 1-16
0x360-0x36F
	Tape Accelerator Card (0x360)	System Use		Quaternary IDE Controller (Slave Drive)(0x36E-0x36F)
	Non NE2000 Network Card	System Use
	NE2000 Network Card (0x300-0x31F) Bytes 1-16
0x370-0x37F
	Tape Accelerator Card (0x370)	Secondary IDE Controller (Slave Drive)	LPT1 - First Parallel Port (Color systems)
	System Use		LPT2 - Second Parallel Port (Monochrome Systems)
	NE2000 Network Card (0x360-0x37F) Bytes 1-16
0x380-0x38F	System Use		Sound Card (FM Synthesizer)	System Use
0x390-0x39F	System Use
0x3A0-0x3AF	System Use
0x3B0-0x3BF	VGA/Monochrome Video			LPT1 - First Parallel Port (Monochrome Systems)
0x3C0-0x3CF	VGA/CGA Video
0x3D0-0x3DF	VGA/CGA Video
0x3E0-0x3EF
	Tape Accelerator Card (0x370)	System Use	COM3 - Third Serial Port
	System Use			Tertiary IDE Controller (Slave Drive)(0x3EE-0x3EF)
0x3F0-0x3FF
	Floppy Disk Controller		COM1 - First Serial Port
	Tape Accelerator Card (0x3F0)	Primary IDE Controller (Slave Drive)(0x3F6-0x3F7)	System Use