
                  Operating System Comparisons (2) (Fidonet)

                 Saturday, 30-Oct-1999 to Friday, 05-Nov-1999

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From: Dirk Cap                                          21-Oct-99 23:14:25
  To: David Bowerman                                    30-Oct-99 07:34:08
Subj: Ring 0......

Hello David,

On (15 Oct 99) David Bowerman wrote to Dirk Cap...

 DB>  DC> What is the real purpose of the clock inside the multitasking
 DB>  DC> system ?
 DB> 
 DB> Not sure just what you mean by your question.  For Intel 80x86

 Maybe I have misspelled my question. My native language isn't the
 English you know.

 DB> architecture machines, the Ring number relates to what a program is
 DB> allowed to do (it's privilege level).  A Ring 0 program has access to
 DB> all memory, all I/O, all registers.  A Ring 3 program is much more

 That was the meaning of my question. Because I am not a true IT
 specialist I don't know exactly what the purpose is of some internal
 techniques used in operating systems. Knowledge of these techniques
 haven't influence in the usage of a computer but can give sometimes
 a solution to solve a problem.

 DB> limited.  The operating system would run at Ring 0 while a user
 DB> program would run at Ring 3 to allow protecting user programs from
 DB> each other.

 Thanks for the information.
 Right now there is one item I can understand in the codefragment
 of the Multics sheduler and dispatcher. I have readed once inside
 OS/2 IBM uses the same technology to task all his running processes.
 How about Win 95-98 or NT ?

 Greetings,
 Dirk

... Old bakers never die, they just quit making dough!

--- PPoint 1.70
 * Origin: Cap Dirk from Belgium (2:292/865.19)

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From: Dirk Cap                                          21-Oct-99 23:34:23
  To: Rodrigo Cesar Banhara                             30-Oct-99 07:34:08
Subj: Honest Opinion

Hello Rodrigo,

On (16 Oct 99) Rodrigo Cesar Banhara wrote to Dirk Cap...

 RC> I dont like Visual environment. It is bad for development of
 RC> expertise in programming. However, =real= OOP isn't the same
 RC> than Visual programming. Heritage, Methods, Polymorphism &
 RC> things like this. Source code in OOP is dont *easy* to write.
 RC> 
 RC> I am studying this yet, but Visual & OOP are not the same thing.

 I know what you mean. But working on a C++ program inside the
 Visual Studio is really OOP with C++. In the past I have also seen
 software to create applications based on objects like buttons, etc.
 The technique of drawing an button and link this button on some
 actions depending on some specific events is used by some products
 from Borland and some Basic products from MS. Visual Studio is
 just and environment to create soft using the standard C-C++
 compiling technology. Via the same environment you can create
 apps using Java, Basic and Interdev. There are profesional developers
 who are using the VS to create there products. Maybe you are a true
 IT-prof working with Unix products. I must confess I never wrote
 some Makefile by hand but let them create by the environment and
 correct this file after creation. Maybe this is off topic but
 can you tell me products who are better for use instead of the VS ?

 Greetings,
 Dirk

... Old bakers never die, they just quit making dough!

--- PPoint 1.70
 * Origin: Cap Dirk from Belgium (2:292/865.19)

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