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Lenovo NetVista A22 User guide for NetVista 2254, 2256, 2257, 6336, 6337, 6339 - Page 78

Address hex, Description, Byte pointer, Table 3. DMA I/O address map continued

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Table 3. DMA I/O address map (continued) Address (hex) Description 008B Channel 5, page table address register 008F Channel 4, page table address/refresh register 00C0 Channel 4, memory address register 00C2 Channel 4, transfer count register 00C4 Channel 5, memory address register 00C6 Channel 5, transfer count register 00C8 Channel 6, memory address register 00CA Channel 6, transfer count register 00CC Channel 7, memory address register 00CE Channel 7, transfer count register 00D0 Channels 4-7, read status/write command register 00D2 Channels 4-7, write request register 00D4 Channels 4-7, write single mask register bit 00D6 Channels 4-7, mode register (write) 00D8 Channels 4-7, clear byte pointer (write) 00DA Channels 4-7, master clear (write)/temp (read) 00DC Channels 4-7, clear mask register (write) 00DE Channels 4-7, write all mask register bits 00DF Channels 5-7, 8- or 16-bit mode select Bits 00 - 07 00 - 07 00 - 15 00 - 15 00 - 15 00 - 15 00 - 15 00 - 15 00 - 15 00 - 15 00 - 07 00 - 02 00 - 02 00 - 07 N/A 00 - 07 00 - 03 00 - 03 00 - 07 Byte pointer Yes Yes Yes Yes Yes Yes Yes Yes 66 User Guide

Section	Page
Contents	5
Safety Information	7
Lithium battery notice	8
Modem safety information	8
Laser compliance statement	9
About this book	11
How this book is organized	11
Information resources	12
Chapter 1. Overview	13
Identifying your computer	13
Small desktop model computer	14
Desktop model computer	14
Microtower model computer	15
Features	15
Specifications	17
Physical specifications — small desktop model	18
Physical specifications — desktop model	19
Physical specifications — microtower model	20
Available options	21
Tools required	21
Handling static-sensitive devices	21
Chapter 2. Installing external options	23
Locating the connectors on the front of your computer	23
Locating the connectors on the rear of your computer	25
Home PNA network adapter	28
Obtaining device drivers	29
Chapter 3. Installing internal options — small desktop model	31
Removing the cover	31
Locating components	32
Identifying parts on the system board	32
Installing memory	33
Installing DIMMs	33
Installing adapters	34
Installing internal drives	35
Drive specifications	35
Installing a drive	36
Installing a Rope Clip	37
Replacing the cover and connecting the cables	38
Chapter 4. Installing internal options — desktop model	41
Removing the cover	41
Locating components	42
Identifying parts on the system board	42
Installing memory	43
Installing DIMMs	43
Installing adapters	44
Installing internal drives	45
Drive specifications	46
Installing a drive	47
To connect the first IDE CD drive or DVD drive	48
To connect an additional IDE CD drive or DVD drive	49
To connect an additional IDE hard disk drive	49
Installing a Rope Clip	49
Replacing the cover and connecting the cables	50
Chapter 5. Installing internal options — microtower model	53
Removing the cover	53
Locating components	54
Moving the power supply	54
Identifying parts on the system board	56
Installing memory	57
Installing DIMMs	57
Installing adapters	58
Installing internal drives	59
Drive specifications	60
Installing a drive	61
To connect the first IDE CD drive or DVD drive	62
To connect an additional IDE CD drive or DVD drive	63
To connect an additional IDE hard disk drive	63
Installing a Rope Clip	63
Replacing the cover and connecting the cables	64
Chapter 6. Updating the computer configuration	67
Verifying that an option is installed correctly	67
Configuring PCI adapters	68
Configuring startup devices	68
Erasing a lost or forgotten password (clearing CMOS)	68
Appendix A. Changing the battery	71
Appendix B. Updating System Programs	73
System programs	73
Recovering from a POST/BIOS update failure	73
Appendix C. System address maps	75
System memory map	75
I/O address map	75
DMA I/O address map	77
Appendix D. Interrupt request and direct memory access channel assignments	79
Appendix E. Notices and trademarks	81
Television output notice	81
Trademarks	82

Match case Limit results 1 per page

Table 3. DMA I/O address map (continued)

Address (hex)

Description

Bits

Byte pointer

008B

Channel 5, page table address register

–

008F

Channel 4, page table address/refresh register

–

00C0

Channel 4, memory address register

–

Yes

00C2

Channel 4, transfer count register

–

Yes

00C4

Channel 5, memory address register

–

Yes

00C6

Channel 5, transfer count register

–

Yes

00C8

Channel 6, memory address register

–

Yes

00CA

Channel 6, transfer count register

–

Yes

00CC

Channel 7, memory address register

–

Yes

00CE

Channel 7, transfer count register

–

Yes

00D0

Channels 4

–

7, read status/write command register

–

00D2

Channels 4

–

7, write request register

–

00D4

Channels 4

–

7, write single mask register bit

–

00D6

Channels 4

–

7, mode register (write)

–

00D8

Channels 4

–

7, clear byte pointer (write)

N/A

00DA

Channels 4

–

7, master clear (write)/temp (read)

–

00DC

Channels 4

–

7, clear mask register (write)

–

00DE

Channels 4

–

7, write all mask register bits

–

00DF

Channels 5

–

7, 8- or 16-bit mode select

–

User Guide