IBM Partner Pavilion 6795, 6343, 6793, 6349, 6791, 6790 Address hex Description Bits Byte pointer

Page 78

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

Address (hex)

Description

Bits

Byte pointer

 

 

 

 

008A

Channel 7, page table address register

00 – 07

 

 

 

 

 

008B

Channel 5, page table address register

00 – 07

 

 

 

 

 

008F

Channel 4, page table address/refresh register

00 – 07

 

 

 

 

 

00C0

Channel 4, memory address register

00 – 15

Yes

 

 

 

 

00C2

Channel 4, transfer count register

00 – 15

Yes

 

 

 

 

00C4

Channel 5, memory address register

00 – 15

Yes

 

 

 

 

00C6

Channel 5, transfer count register

00 – 15

Yes

 

 

 

 

00C8

Channel 6, memory address register

00 – 15

Yes

 

 

 

 

00CA

Channel 6, transfer count register

00 – 15

Yes

 

 

 

 

00CC

Channel 7, memory address register

00 – 15

Yes

 

 

 

 

00CE

Channel 7, transfer count register

00 – 15

Yes

 

 

 

 

00D0

Channels 4–7, read status/write command register

00 – 07

 

 

 

 

 

00D2

Channels 4–7, write request register

00 – 02

 

 

 

 

 

00D4

Channels 4–7, write single mask register bit

00 – 02

 

 

 

 

 

00D6

Channels 4–7, mode register (write)

00 – 07

 

 

 

 

 

00D8

Channels 4–7, clear byte pointer (write)

N/A

 

 

 

 

 

00DA

Channels 4–7, master clear (write)/temp (read)

00 – 07

 

 

 

 

 

00DC

Channels 4–7, clear mask register (write)

00 – 03

 

 

 

 

 

00DE

Channels 4–7, write all mask register bits

00 – 03

 

 

 

 

 

00DF

Channels 5–7, 8- or 16-bit mode select

00 – 07

 

 

 

 

 

66User Guide

Image 78
Contents Page Page Page Page Contents Index Safety Information To connect To disconnectLithium battery notice Modem safety informationLaser compliance statement Consignes de sécurité relatives au modemViii User Guide About this book How this book is organizedInformation resources Overview Identifying your computerUser Guide Features MicroprocessorExpansion Specifications Physical specifications small desktop modelPhysical specifications desktop model Physical specifications microtower model Available options Tools requiredHandling static-sensitive devices Overview User Guide Installing external options Locating the connectors on the front of your computerUSB connector Locating the connectors on the rear of your computer User Guide Installing external options Connector Description Obtaining device driversInstalling internal options small desktop model Removing the coverLocating components Identifying parts on the system boardInstalling memory Installing DIMMsInstalling adapters What to do nextInstalling internal options small desktop model What to do next Installing internal drives Drive specificationsInstalling a drive Installing a Rope Clip Replacing the cover and connecting the cables Installing internal options small desktop model User Guide Installing internal options desktop model Locating components Installing internal options desktop model Installing adapters Installing internal drives Drive specifications Installing a drive To connect the first IDE CD drive or DVD drive To connect an additional IDE CD drive or DVD drive Replacing the cover and connecting the cables Installing internal options desktop model User Guide Installing internal options microtower model Moving the power supply Installing internal options microtower model Installing memory Installing adapters User Guide Installing internal drives Installing a drive Installing internal options microtower model To connect the first IDE CD drive or DVD drive Installing a Rope Clip Replacing the cover and connecting the cables Installing internal options microtower model User Guide Using the IBM Setup Utility program Administrator password Setting, changing, and deleting a passwordErasing a lost or forgotten password clearing Cmos Startup sequence Using Security Profile by DeviceOther settings in the IBM Setup Utility program Changing the startup sequenceUser Guide Appendix A. Changing the battery User Guide Recovering from a POST/BIOS update failure Appendix B. Updating System ProgramsSystem programs User Guide Appendix C. System address maps System memory mapAddress map LPT3 DMA I/O address map COM1Address hex Description Bits Byte pointer Following tables list the IRQ and DMA channel assignments User Guide Appendix E. Notices and trademarks Television output noticeTrademarks IBMIndex DMA IRQLocation 19, 31 Memory Page Part Number 25P4024