"Second, Intel's 36 bit addressing does not require segments, it requires paging. It's a flat
space from a process's point of view (limited to 4GB per process, of course)."
Well, in that case it might as well be a 32-bit segment offset. Did you every write code on a 16-bit DOS machine? It was exactly the same problem, but with 16-bit segment offsets (ie 64K of RAM)
48-bit addressing is 2^16 times better than 32-bit addressing. The 40-bit physical addressing is just the first hardware implementation (in the same way that the 68000 has 32bit address regeisters, but physically could only address 24bits (16MB) of RAM). Have you looked at the Hammer registers?
Remember, there are only ~10^30 hydrogen atoms in the universe or something.
...they forced Microsoft to end the clauses they have in their licensing agreements with PC manufacturers prohibiting them from offering for sale PC's with other operating systems installed.
There are numerous cases where if a vendor wishes to sell PC's running Windows, they are prohibited, in their M$ contract, from selling machines (a) without Windows installed or (b) with another OS installed along side Windows i.e. Windows and Windows only on 100% of machines.
"Keep in mind, though, that you will not be able to use 64-bit addressing in 32-bit compatability mode with the AMD offering... you'll still be stuck with the 4 gig limit when running "legacy" code."
True, but with 64-bit OS's on Hammer, you can run 32-bit apps along side the 64-bit ones. Have a look at the work SuSE is doing.
http://www.x86-64.org
It's pretty impressive, and it's all working (on the simulator). I've seen 64-bit Linux boot and run X on a laptop running the simulator:-)
3GHz is all well an good, but we're coming up against the 4GB RAM addressing limit of 32-bit machines. Granted, the Pentium architecture can address 36-bits using segments, but we're back to the bad old days of LIM Expanded Memory and segments (who could ever need more than 640k?).
I think AMD are on to a reall winner with their 64-bit Hammer architecture since that's completely backwards compatible and has a flat, 64-bit address space.
"Itanium can run un-modified x86 and in certain cases PA-RISC binaries unmodified."
Yes, but only by using a software emulator. The hardware has no support for these instruction sets at all. This is just like the FX!32 x86 emulation software for the Alpha. It suffers from a fair old overhead and performance decreease, not lesst because in the case of Itanium you are trying to map a program written for a (essentially) serail processor onto a VLIW processor. Not easy.
Yes, but you could use the nuclear fuel as propulsion once out of the earth's atmosphere. If your craft has a new (unirradiated) reactor core, the nuclear fuel is no more radioactive that the natural environment (probably much less depending on where you live).
I worked as a reactor physics engineer for 5 years. I know what I'm talking about.
Sounds like a good-ish idea: make a synthetic aperture radio telescope with one side on the earth and the other on the moon...
Of course, we could also use the lagrange points in the earth's orbit around the sun. Now, that would be cool.
...if you like...
..but..
if your widget set gets a re-write, why should you have to recode your entire GUI? Have they not settled on a standard interface yet?
"Seatbelts are the perfect example. The legislators decided they wanted people to wear them (to benefit the individual of course) but they forgot that I am not hurting anyone else if I die in a fucking accident b/c I wasn't wearing mine. Who the fuck are they to tell me that I have to wear a restraint when driving my car?"
Wrong! Bad analogy. If you weren't wearing your seatbelt you could hit someone else as you are hurled through the air. It is very common for unrestrained rear seat passengers to kill front seat occupants as they are thrown forwards, smashing their skulls or tearing their heads off.
You could be rattled about the inside of your car squashing everyone else. You could be hurled through the windscreen and hit someone outside or even someone in the other car (if one is involved).
What a damned petty and stupid thing to get worked up about.
SuSE has done some absolutely brilliant work in porting the Linux kernel to AMD's x86-64 architecture, and in doing so they ported binutils, gcc etc.
Hopefull any business restructuring they do will help them survive in the long term. There is a recession going on, after all, and cut-backs are to be expected.
Their distro is very good (I don't use it personally, I'm a Slackware man through and through) but at work we make heavy use of SuSE.
Good luck to SuSE. This is one great Linux company that deserves sucess.
All they showed was that women sitting on a chair for long periods were more likely to mis-carry. It was the seating position rather than the EM radiation that was most likely the culprit.
I can't understand the British education system's obsession with buying computers (and expensive, inferior software). Good teachers, good books, good libraries and good working environments are far more important than having the most bang-up-to-date and expensive computers for most things. The exception, of course, is in science and engineering, where decent supercomputers and networks of beefy workstations are required.
Thin clients are what they need for net access, word processing etc.
Before the Arts students get a new Pentium IV network for writing their Word documents, they should up the pay of the lecturers.
(I'm not in Higher Education, just having my morning rant)
This sounds like a really good read. It's all very well being able to dump bytes to a device or read packets from the network, but a good understanding of what's going on in a physical sense is invaluable.
Maybe one of these days when I've read the other 2 dozen books I have lying around waiting, I'll get this one.
With this sort of understanding, great things should be possible.
Please post more reviews of proper text books such as these.
PS Those of you in the UK, in case you didn't already know, your local public library is obliged to get you any book you ask for, no matter how obscure. It's the law. So get this one:-)
What I would like to know is, if we adopt wind turbines wholesale, what the effect will be on the local climate?
A good wind turbine takes up to 45% of the kinetic energy out of the wind. In built up areas, just think, the lower winds would result in increased build-up of pollution from vehicles.
What will it do to weather patterns if we significantly alter the flow of air around the place?
The presence of wind generators near vehicles will result in the vehicles having to expend more energy to displace the air around them since the wind turbines will be causing extra resistance. Since no system is 100% efficient, more energy will have to be expended by the vehicles than is reclaimed from the turbines.
What will happen to passers-by if one sheds a blade?
Will any country ever build buildings that large again in light of recent events in the USA?
This isn't a troll or flame. I would just like some answers...
Slashdot Mirror
Aw, only 48 orders of magnitude. :-)
No it isn't. It only mentions Middleware and competing applications. I see no mention of rival Operating Systems.
Liar
I must have missed it.
"Second, Intel's 36 bit addressing does not require segments, it requires paging. It's a flat
space from a process's point of view (limited to 4GB per process, of course)."
Well, in that case it might as well be a 32-bit segment offset. Did you every write code on a 16-bit DOS machine? It was exactly the same problem, but with 16-bit segment offsets (ie 64K of RAM)
48-bit addressing is 2^16 times better than 32-bit addressing. The 40-bit physical addressing is just the first hardware implementation (in the same way that the 68000 has 32bit address regeisters, but physically could only address 24bits (16MB) of RAM). Have you looked at the Hammer registers?
Remember, there are only ~10^30 hydrogen atoms in the universe or something.
...they forced Microsoft to end the clauses they have in their licensing agreements with PC manufacturers prohibiting them from offering for sale PC's with other operating systems installed.
There are numerous cases where if a vendor wishes to sell PC's running Windows, they are prohibited, in their M$ contract, from selling machines (a) without Windows installed or (b) with another OS installed along side Windows i.e. Windows and Windows only on 100% of machines.
probably
"Keep in mind, though, that you will not be able to use 64-bit addressing in 32-bit compatability mode with the AMD offering... you'll still be stuck with the 4 gig limit when running "legacy" code."
:-)
True, but with 64-bit OS's on Hammer, you can run 32-bit apps along side the 64-bit ones. Have a look at the work SuSE is doing.
http://www.x86-64.org
It's pretty impressive, and it's all working (on the simulator). I've seen 64-bit Linux boot and run X on a laptop running the simulator
3GHz is all well an good, but we're coming up against the 4GB RAM addressing limit of 32-bit machines. Granted, the Pentium architecture can address 36-bits using segments, but we're back to the bad old days of LIM Expanded Memory and segments (who could ever need more than 640k?).
I think AMD are on to a reall winner with their 64-bit Hammer architecture since that's completely backwards compatible and has a flat, 64-bit address space.
here here!
:-)
Yes, off-topic.
I say My S Q L
etcetera
you-zer
but then I'm Scottish and you're an idiot.
"Itanium can run un-modified x86 and in certain cases PA-RISC binaries unmodified."
Yes, but only by using a software emulator. The hardware has no support for these instruction sets at all. This is just like the FX!32 x86 emulation software for the Alpha. It suffers from a fair old overhead and performance decreease, not lesst because in the case of Itanium you are trying to map a program written for a (essentially) serail processor onto a VLIW processor. Not easy.
Yes, but you could use the nuclear fuel as propulsion once out of the earth's atmosphere. If your craft has a new (unirradiated) reactor core, the nuclear fuel is no more radioactive that the natural environment (probably much less depending on where you live).
I worked as a reactor physics engineer for 5 years. I know what I'm talking about.
Sounds like a good-ish idea: make a synthetic aperture radio telescope with one side on the earth and the other on the moon...
Of course, we could also use the lagrange points in the earth's orbit around the sun. Now, that would be cool.
AKAIK it's C++ and there hasn't been a standard ABI until GCC 3.0.
Aw well..
...if you like...
..but..
if your widget set gets a re-write, why should you have to recode your entire GUI? Have they not settled on a standard interface yet?
It's impossible to live forever unless you were alive before you were born.
"Seatbelts are the perfect example. The legislators decided they wanted people to wear them (to benefit the individual of course) but they forgot that I am not hurting anyone else if I die in a fucking accident b/c I wasn't wearing mine. Who the fuck are they to tell me that I have to wear a restraint when driving my car?"
Wrong! Bad analogy. If you weren't wearing your seatbelt you could hit someone else as you are hurled through the air. It is very common for unrestrained rear seat passengers to kill front seat occupants as they are thrown forwards, smashing their skulls or tearing their heads off.
You could be rattled about the inside of your car squashing everyone else. You could be hurled through the windscreen and hit someone outside or even someone in the other car (if one is involved).
What a damned petty and stupid thing to get worked up about.
Well, that's what they're telling their (potential) customers just now...
..because the official line of the HP sales people at the moment is that the entire world will be using 64-bit Windows XP within 2 years.
SuSE has done some absolutely brilliant work in porting the Linux kernel to AMD's x86-64 architecture, and in doing so they ported binutils, gcc etc.
Hopefull any business restructuring they do will help them survive in the long term. There is a recession going on, after all, and cut-backs are to be expected.
Their distro is very good (I don't use it personally, I'm a Slackware man through and through) but at work we make heavy use of SuSE.
Good luck to SuSE. This is one great Linux company that deserves sucess.
"I bet that does wonders for HP's Unix Workstation business..."
Well, what about adopting itanic and Windows XP and becoming Yet Another Wintel Box Shifter?
I'm sure that's done more damage....
All they showed was that women sitting on a chair for long periods were more likely to mis-carry. It was the seating position rather than the EM radiation that was most likely the culprit.
I can't understand the British education system's obsession with buying computers (and expensive, inferior software). Good teachers, good books, good libraries and good working environments are far more important than having the most bang-up-to-date and expensive computers for most things. The exception, of course, is in science and engineering, where decent supercomputers and networks of beefy workstations are required.
Thin clients are what they need for net access, word processing etc.
Before the Arts students get a new Pentium IV network for writing their Word documents, they should up the pay of the lecturers.
(I'm not in Higher Education, just having my morning rant)
This sounds like a really good read. It's all very well being able to dump bytes to a device or read packets from the network, but a good understanding of what's going on in a physical sense is invaluable. :-)
Maybe one of these days when I've read the other 2 dozen books I have lying around waiting, I'll get this one.
With this sort of understanding, great things should be possible.
Please post more reviews of proper text books such as these.
PS Those of you in the UK, in case you didn't already know, your local public library is obliged to get you any book you ask for, no matter how obscure. It's the law. So get this one
What I would like to know is, if we adopt wind turbines wholesale, what the effect will be on the local climate?
A good wind turbine takes up to 45% of the kinetic energy out of the wind. In built up areas, just think, the lower winds would result in increased build-up of pollution from vehicles.
What will it do to weather patterns if we significantly alter the flow of air around the place?
The presence of wind generators near vehicles will result in the vehicles having to expend more energy to displace the air around them since the wind turbines will be causing extra resistance. Since no system is 100% efficient, more energy will have to be expended by the vehicles than is reclaimed from the turbines.
What will happen to passers-by if one sheds a blade?
Will any country ever build buildings that large again in light of recent events in the USA?
This isn't a troll or flame. I would just like some answers...