Click here to Skip to main content
15,504,286 members
Home / Discussions / System Admin
   

System Admin

 
SuggestionRe: arp/rarp simulators Pin
Richard MacCutchan28-Dec-14 23:21
mveRichard MacCutchan28-Dec-14 23:21 
QuestionRemote Desktop - How to Restart Win 8 Pin
Richard Andrew x6422-Dec-14 10:27
professionalRichard Andrew x6422-Dec-14 10:27 
AnswerRe: Remote Desktop - How to Restart Win 8 Pin
Kornfeld Eliyahu Peter22-Dec-14 11:17
professionalKornfeld Eliyahu Peter22-Dec-14 11:17 
GeneralRe: Remote Desktop - How to Restart Win 8 Pin
Richard Andrew x6422-Dec-14 11:25
professionalRichard Andrew x6422-Dec-14 11:25 
JokeRe: Remote Desktop - How to Restart Win 8 Pin
Kornfeld Eliyahu Peter22-Dec-14 11:27
professionalKornfeld Eliyahu Peter22-Dec-14 11:27 
AnswerRe: Remote Desktop - How to Restart Win 8 Pin
Member 1141561730-Jan-15 11:17
Member 1141561730-Jan-15 11:17 
GeneralRe: Remote Desktop - How to Restart Win 8 Pin
Richard Andrew x6431-Jan-15 8:01
professionalRichard Andrew x6431-Jan-15 8:01 
QuestionMemory Mapped vs I/O Mapped Input Output Pin
R_Y_A_N4-Dec-14 9:53
R_Y_A_N4-Dec-14 9:53 
I'm currently reading a computer organization book and i'm so confused about Input/Output mechanism and have lots of questions in my mind.

As i understood there are two concepts for communicating with peripherals, first one is Memory Mapped I/O and the other one is I/O(Port) Mapped I/O.If the architecture is based on Memory Mapped I/O there are no special I/O instructions like "in","out" etc and device registers are mapped to memory address space so we can read or write to peripheral ports by "mov" instruction.On the other hand if architecture is based on I/O Mapped I/O, device registers are mapped to I/O address space which is completely separated from memory address space and cpu uses special instructions("in","out","ins","outs" ) for reading or writing to I/O Mapped device registers.

So here is my questions;

1.)If X86 architecture uses I/O(Port,Isolated etc) Mapped I/O technique why there are memory address spaces for devices like graphic card?

2.)If graphic card maps 1 gb memory to main memory address space what does it mean?Does it mean Memory Mapped I/O ?

3.)If x86 architecture doesn't use Memory Mapped I/O how a device can maps itself to memory address space?

4.)If x86 architecture can use Memory Mapped I/O ,how can it use and with which instructions?

5.)If I/O mapping is about mapping peripheral registers why graphic card wants so much space for mapping ?

modified 5-Dec-14 3:31am.

Questionmachine code : disabling interupts ? Pin
Member 109640992-Dec-14 18:06
Member 109640992-Dec-14 18:06 
AnswerRe: machine code : disabling interupts ? Pin
Richard MacCutchan2-Dec-14 22:54
mveRichard MacCutchan2-Dec-14 22:54 
QuestionElevating privileges for a non-priv'd user? Pin
charlieg20-Nov-14 5:34
charlieg20-Nov-14 5:34 
AnswerRe: Elevating privileges for a non-priv'd user? Pin
den2k8820-Nov-14 5:45
professionalden2k8820-Nov-14 5:45 
AnswerRe: Elevating privileges for a non-priv'd user? Pin
Richard Deeming20-Nov-14 6:24
mveRichard Deeming20-Nov-14 6:24 
QuestionObtaining IP Address... Pin
Roger Wright23-Oct-14 21:23
professionalRoger Wright23-Oct-14 21:23 
AnswerRe: Obtaining IP Address... Pin
Michael Martin25-Oct-14 23:47
professionalMichael Martin25-Oct-14 23:47 
GeneralRe: Obtaining IP Address... Pin
Roger Wright26-Oct-14 8:24
professionalRoger Wright26-Oct-14 8:24 
GeneralRe: Obtaining IP Address... Pin
Roger Wright27-Oct-14 19:58
professionalRoger Wright27-Oct-14 19:58 
AnswerRe: Obtaining IP Address... Pin
Albert Holguin3-Nov-14 13:14
professionalAlbert Holguin3-Nov-14 13:14 
GeneralRe: Obtaining IP Address... Pin
Roger Wright3-Nov-14 14:29
professionalRoger Wright3-Nov-14 14:29 
GeneralRe: Obtaining IP Address... Pin
Albert Holguin4-Nov-14 5:26
professionalAlbert Holguin4-Nov-14 5:26 
QuestionAddress translation via router Pin
Orjan Westin25-Sep-14 7:04
professionalOrjan Westin25-Sep-14 7:04 
AnswerRe: Address translation via router Pin
Bernhard Hiller25-Sep-14 22:31
Bernhard Hiller25-Sep-14 22:31 
GeneralRe: Address translation via router Pin
Orjan Westin25-Sep-14 23:27
professionalOrjan Westin25-Sep-14 23:27 
GeneralRe: Address translation via router Pin
Roger Wright23-Oct-14 21:39
professionalRoger Wright23-Oct-14 21:39 
GeneralRe: Address translation via router Pin
Orjan Westin27-Oct-14 2:18
professionalOrjan Westin27-Oct-14 2:18 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Praise Praise    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.