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computer organization and architecture

Name: anon 2011-03-09 17:10

Guys, I must ask. What do you make of this statement?

"Suppose there is a virtual machine containing levels V1 and V2, where V2 is above V1 in the machine heirarchy. The programs written in language V2 must be translated by a program running at level V1."

True or False?

My professor insists that it is true and not ambiguous. I tried to disprove him by showing that the negation was true, but he wouldn't have it. Not sure what else to do, need someone to explain to me why this is not ambiguous.

Name: Anonymous 2011-03-09 17:12

What do you mean the negation is true? That if V1 is above V2 then programs written in V1 must be translated to v1? Well duh.

Name: OP 2011-03-09 17:16

No, that's not what you need to negate.  Try negating the last sentence and you'll see what I mean.

Name: Anonymous 2011-03-09 17:18

"I have Asperger's and thought I'd show my professor I was better than him, but I'm not and I can't handle the fact... I'm not sure what else to do"

Name: Anonymous 2011-03-09 17:19

mailto:noko
Name: OP

9/10

Name: OP 2011-03-09 17:19

I'm just trying to understand why it's true, that's all man.  I know damn well my professor knows more about this than I do.

Name: Anonymous 2011-03-09 17:20

I'm afraid I don't. A program written for a lower level does not have to be translated to a higher level at all in order to be executed, although one could presumably do that.

Name: Anonymous 2011-03-09 17:23

mailto:noko
Name: OP
mailto:noko
Name: OP

9.9/10

Name: Anonymous 2011-03-09 17:31

mailto:noko[o]
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Shiiiiiiiiiiiiiiiiiit.

Name: OP 2011-03-09 17:34

I swear I'm not trolling guys idk how to work this board lol

Name: Anonymous 2011-03-09 17:36

>>10
Remove your name and use sage, not noko.

Name: OP 2011-03-09 17:36

Name: Anonymous 2011-03-09 17:42

>>12
Also remove your ``thread at /g/''.

noko -> sage
OP -> Anonymous

Name: Anonymous 2011-03-09 18:57

Popek and Goldberg virtualization requirements, read them, understand them.

Name: Anonymous 2011-03-09 19:39

You're right though.  There's no need to translate it as it could be executed one instruction at a time.  Or the machines could have the same instruction set and the V2 program only needs to checked for forbidden operations before running it verbatim.  Or it could be sent to an external machine for translation.  "Must be translated by" is a pretty odd claim.

Don't change these.
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