I think they treated the woman who was obviously the victim of a misunderstanding quite poorly, but I wasn't there. Maybe her initial remark was quite aggressive, in which case she probably deserved to be wound up. It might stop her from leaping in with both feet on the basis of incomplete information in future.
But the 6502 only had 3 8-bit registers! It did not have any registers that could fully hold an address
True but it had special address modes which allowed it to access locations in the zeroth page using an eight bit address which saved a clock cycle when loading the data from the address. Also, there were address modes to allow you to do indirect addressing off pairs of zero page locations. This gave the programmer 128 address registers (albeit slow ones) to play with.
Yes the Z80 had 16 bit arithmetic, but IIRC the internal data paths were 8 bit (like the 6502) so there wasn't much speed advantage. And the registers were not general purpose. Each register/register pair behaved slightly differently in some way.
Oh and the 1MHz 6502 was contemporary with the 2 MHz Z80. There was a 2MHz 6502 which was more or less contemporary with the 4MHz Z80.
And you know what. For decades, people (in the UK) have been copying their records/CDs on to cassette tapes/minidisc/MP3 illegally, just so they can listen to them at a time that is convenient to them e.g. in the car or on a plane or train, and nobody has ever done anything to stop them. This law, at least in the context of copying your own CDs for personal use, is not going to be enforced, so they may as well have put a fair use provision in it to stop us all from becoming criminals and thus kept 99% of the people happy.
If x is the initial IQ then it is a constant so x^(1/2) is the square root of a constant so it is not increasing or decreasing. I think you need something like:
...snaffling all port 25 traffic and redirecting it to their own crappy server (NTL in the UK do this already)?
No they don't. I have a UK NTL home cable connection. I've just tried connecting outbound on it to a Messagelabs server and it went directly there.
Your description of your problems with BT suggests that a strongly worded letter of complaint together with a demand for some compensation is in order. They won't improve their service unless people do complain. My company had problems with the same outage you described and the attitude BT took could only be described as unbelievable. They seemed to think it was acceptable for the mail server to be out for a week. They need to be taught that it is not.
In general many of the problems people describe here are down to incompetent ISPs: "my ISP's subcontractor blocked a site without me asking", my ISP takes over three hours to deliver mail and sometimes loses it", "My ISP rewrites the from address of my outbound mail"..... All of these problems are symptoms of an unacceptable level of service and can be remedied by finding a new ISP.
I pay my ISP to provide me with a connection to the Internet. If they blocked my access to *any* public IP address/TCP port without my say-so, I'd get pretty upset.
Traditional
methods of registration, such as asking the user to go to a website or
navigate to the Router's internal Web page to enter information didn't
meet the ease-of-use goal.
So making this feature available by placing an ad on the web admin page with a link to the subscription site is considered to be too difficult for users of the router. These are users who are expected to be able to configure it for DHCP, NAT etc.
OTOH the instructions to turn off this misfeature using the admin page involve navigating to a URL and clicking on a couple of links. Aparently there is "nothing to it".
I use MS Office on the Mac. It has a "printer" driver that outputs the doc to PDF which is actually incredibly useful. IMHO you should never be sending Office documents to third parties since a) they might not have MS office, b) you might have a macro virus, c) Office documents can contain remnants of text from other older versions of the doc, d) it gives you better control over who is able to modify the docs.
Some of these arguments will not apply to Open Office, but think about sending an Open Office doc to a customer who uses MS Office. Either they have to get Open Office to read it or you have to convert it to MS Office format which means having at least one copy of MS Office to check it looks OK. Or you could use PDF. Everybody has Acrobat reader (or equivalent).
Pascal is an excellent language for learning the fundamentals of programming. Fo a start, the syntax is a little more friendly to the beginner e.g. uses begin....end instead of {....} for blocks. Secondly you are more insulated from the underlying machine e.g. running off the end of an array will generate some sort of error instead of carrying on possibly with unexplained weird behaviour.
Once somebody has picked up the fundamentals, then I'd move them on to the "real" langiuages.
Now I think about it, the ISP for our office is not the most reliable in the World, so we have lost our connection a couple of times. You inevitably hear the cry "the internet is down" when this happens. We are an IT company, so it is, of course just shorthand for "our ISP has screwed up again". It's also reminiscent of an old British newspaper headline "fog in the channel, continent cut off".
Just tried it on my remote desktop from my MacOSX box (there's a free client available from M$) to my XP box and it works both ways.
Just tried it in Acrobat Reader and it works. Of course PDF documents can be given attributes that deliberately prevent you from pasting text out of the doc.
I agree with you about the tabbing thing though. Neither the Mac interface nor the Windows one were designed with high volume data entry in mind.
In his defence he could claim that they weren't intended for him. If they had been , they would have been encrypted with his own public key so he would be able to decrypt them.
Except that the computing meaning of the term "file" is different from the general usage meaning of the term file. Out there in real-space a file is a collection of documents relating to one subject, pretty much synonymous with what in Unix is a directory. e.g. my personnel file is probably a folder or section in a filing cabinet which contains a number of documents such as my contract of employment and absentee record etc.
I think you have your airplane analogy the wrong way around. The alternative to lots of VMs on a big mainframe is lots of smaller real machines. Which is more likely to crash, your IBM-Boeing 747 with four engines and four hundred passengers, or one of four hundred single engined light aircraft each carrying one passenger?
TLS encrypts the connection, not individual messages. The idea is to authenticate the client mail server, not the sender of the e-mail.
I don't know the exact technicalities of TLS, but I imagine it would work something like this
The client presents the server with a certificate which contains a) its DNS name, b) a public key, c) the name of a certificate authority, d) an electronic signature from the authority.
The server checks the cert to see if the name does match the DNS name of the client and that the CA is one that the server trusts and that the signature is genuine.
An electronic signature is a secure hash of the data to be signed encrypted with a private key. The signature can only be decrypted with the public key.
So now the server knows that the client has presented a valid certificate. Of course the client might have "borrowed" that certificate from the genuine owner, but if so the client will not be in possession of the corresponding private key and so will not be able to sign anything with the cert or decrypt anything that has been encrypted with the cert's public key. That gives two ways that the server can verify the client is the genuine owner of the certificate, either a) ask the client to sign something or b) encrypt something for the client to decrypt.
Anyway, with TLS once the certificate exchange has taken place, a symmetric encryption technique is negotiated and the rest of the connection is encrypted using the symmetric method. One or more e-mails is then transmitted across the encrypted link.
Note that all of the above is already available with SMTP. The only thing is that under the SMTP RFC mail servers are not allowed to reject messages across non-TLS connections if they are destined for the domain for which the server is a public mail exchanger i.e. the domain's MX record points at that server.
Damnit, with the mention of another hole found in Sendmail I hope it wasn't that.
Are you talking about the DNS map problem? A problem with a feature that nobody uses, in versions of sendmail (less than 8.12.9) that nobody should be using.
There would be no cloud. With no atmosphere to slow down the debris from the explosion it would continue to expand at the same velocity until it hit something. OK, if the explosion were near the moon, the velocity would be modified by gravitational effects, but the stuff would go a lot further than a few feet.
I suspect, that if you were in one of the objects e.g. a space ship, that was hit by the debris, it would sound pretty much the same as a shockwave as all the bits of debris would hit the spaceship at the same time or at least close enough to gether to be indistinguishable to the human ear.
Slashdot Mirror
i just typed in my Slashdot user name and the first three links were my two(!) vanity sites and my Slashdot page.
Typing my real name in was less successful.
The colour of his skin was relevant to the story.
I think they treated the woman who was obviously the victim of a misunderstanding quite poorly, but I wasn't there. Maybe her initial remark was quite aggressive, in which case she probably deserved to be wound up. It might stop her from leaping in with both feet on the basis of incomplete information in future.
But the 6502 only had 3 8-bit registers! It did not have any registers that could fully hold an address
True but it had special address modes which allowed it to access locations in the zeroth page using an eight bit address which saved a clock cycle when loading the data from the address. Also, there were address modes to allow you to do indirect addressing off pairs of zero page locations. This gave the programmer 128 address registers (albeit slow ones) to play with.
Yes the Z80 had 16 bit arithmetic, but IIRC the internal data paths were 8 bit (like the 6502) so there wasn't much speed advantage. And the registers were not general purpose. Each register/register pair behaved slightly differently in some way.
Oh and the 1MHz 6502 was contemporary with the 2 MHz Z80. There was a 2MHz 6502 which was more or less contemporary with the 4MHz Z80.
And you know what. For decades, people (in the UK) have been copying their records/CDs on to cassette tapes/minidisc/MP3 illegally, just so they can listen to them at a time that is convenient to them e.g. in the car or on a plane or train, and nobody has ever done anything to stop them. This law, at least in the context of copying your own CDs for personal use, is not going to be enforced, so they may as well have put a fair use provision in it to stop us all from becoming criminals and thus kept 99% of the people happy.
That wasn't their fault. US law classified 128bit encryption as a munition at the time.
If x is the initial IQ then it is a constant so x^(1/2) is the square root of a constant so it is not increasing or decreasing. I think you need something like:
xe^-t
where t is the time since you started measuring
No they don't. I have a UK NTL home cable connection. I've just tried connecting outbound on it to a Messagelabs server and it went directly there.
Your description of your problems with BT suggests that a strongly worded letter of complaint together with a demand for some compensation is in order. They won't improve their service unless people do complain. My company had problems with the same outage you described and the attitude BT took could only be described as unbelievable. They seemed to think it was acceptable for the mail server to be out for a week. They need to be taught that it is not.
In general many of the problems people describe here are down to incompetent ISPs: "my ISP's subcontractor blocked a site without me asking", my ISP takes over three hours to deliver mail and sometimes loses it", "My ISP rewrites the from address of my outbound mail"..... All of these problems are symptoms of an unacceptable level of service and can be remedied by finding a new ISP.
I pay my ISP to provide me with a connection to the Internet. If they blocked my access to *any* public IP address/TCP port without my say-so, I'd get pretty upset.
Traditional methods of registration, such as asking the user to go to a website or navigate to the Router's internal Web page to enter information didn't meet the ease-of-use goal.
So making this feature available by placing an ad on the web admin page with a link to the subscription site is considered to be too difficult for users of the router. These are users who are expected to be able to configure it for DHCP, NAT etc.
OTOH the instructions to turn off this misfeature using the admin page involve navigating to a URL and clicking on a couple of links. Aparently there is "nothing to it".
Stephen Moore is the only choice for Marvin
I use MS Office on the Mac. It has a "printer" driver that outputs the doc to PDF which is actually incredibly useful. IMHO you should never be sending Office documents to third parties since a) they might not have MS office, b) you might have a macro virus, c) Office documents can contain remnants of text from other older versions of the doc, d) it gives you better control over who is able to modify the docs.
Some of these arguments will not apply to Open Office, but think about sending an Open Office doc to a customer who uses MS Office. Either they have to get Open Office to read it or you have to convert it to MS Office format which means having at least one copy of MS Office to check it looks OK. Or you could use PDF. Everybody has Acrobat reader (or equivalent).
Pascal is an excellent language for learning the fundamentals of programming. Fo a start, the syntax is a little more friendly to the beginner e.g. uses begin....end instead of {....} for blocks. Secondly you are more insulated from the underlying machine e.g. running off the end of an array will generate some sort of error instead of carrying on possibly with unexplained weird behaviour.
Once somebody has picked up the fundamentals, then I'd move them on to the "real" langiuages.
I've been running 10.2.6.for months with no problems.
That's interesting.
Now I think about it, the ISP for our office is not the most reliable in the World, so we have lost our connection a couple of times. You inevitably hear the cry "the internet is down" when this happens. We are an IT company, so it is, of course just shorthand for "our ISP has screwed up again". It's also reminiscent of an old British newspaper headline "fog in the channel, continent cut off".
Just tried it on my remote desktop from my MacOSX box (there's a free client available from M$) to my XP box and it works both ways.
Just tried it in Acrobat Reader and it works. Of course PDF documents can be given attributes that deliberately prevent you from pasting text out of the doc.
I agree with you about the tabbing thing though. Neither the Mac interface nor the Windows one were designed with high volume data entry in mind.
DNS is used for a lot more than telling your web browser to get its pages from.
It's a fundamental misuse of the protocol.
In his defence he could claim that they weren't intended for him. If they had been , they would have been encrypted with his own public key so he would be able to decrypt them.
Except that the computing meaning of the term "file" is different from the general usage meaning of the term file. Out there in real-space a file is a collection of documents relating to one subject, pretty much synonymous with what in Unix is a directory. e.g. my personnel file is probably a folder or section in a filing cabinet which contains a number of documents such as my contract of employment and absentee record etc.
I think you have your airplane analogy the wrong way around. The alternative to lots of VMs on a big mainframe is lots of smaller real machines. Which is more likely to crash, your IBM-Boeing 747 with four engines and four hundred passengers, or one of four hundred single engined light aircraft each carrying one passenger?
TLS encrypts the connection, not individual messages. The idea is to authenticate the client mail server, not the sender of the e-mail.
I don't know the exact technicalities of TLS, but I imagine it would work something like this
The client presents the server with a certificate which contains a) its DNS name, b) a public key, c) the name of a certificate authority, d) an electronic signature from the authority.
The server checks the cert to see if the name does match the DNS name of the client and that the CA is one that the server trusts and that the signature is genuine.
An electronic signature is a secure hash of the data to be signed encrypted with a private key. The signature can only be decrypted with the public key.
So now the server knows that the client has presented a valid certificate. Of course the client might have "borrowed" that certificate from the genuine owner, but if so the client will not be in possession of the corresponding private key and so will not be able to sign anything with the cert or decrypt anything that has been encrypted with the cert's public key. That gives two ways that the server can verify the client is the genuine owner of the certificate, either a) ask the client to sign something or b) encrypt something for the client to decrypt.
Anyway, with TLS once the certificate exchange has taken place, a symmetric encryption technique is negotiated and the rest of the connection is encrypted using the symmetric method. One or more e-mails is then transmitted across the encrypted link.
Note that all of the above is already available with SMTP. The only thing is that under the SMTP RFC mail servers are not allowed to reject messages across non-TLS connections if they are destined for the domain for which the server is a public mail exchanger i.e. the domain's MX record points at that server.
Damnit, with the mention of another hole found in Sendmail I hope it wasn't that.
Are you talking about the DNS map problem? A problem with a feature that nobody uses, in versions of sendmail (less than 8.12.9) that nobody should be using.
It's: Should 5% appear to small
Your version doesn't scan properly. :-)
Yes, it looks like even the poster of the article didn't bother to check out the second page.
There would be no cloud. With no atmosphere to slow down the debris from the explosion it would continue to expand at the same velocity until it hit something. OK, if the explosion were near the moon, the velocity would be modified by gravitational effects, but the stuff would go a lot further than a few feet.
I suspect, that if you were in one of the objects e.g. a space ship, that was hit by the debris, it would sound pretty much the same as a shockwave as all the bits of debris would hit the spaceship at the same time or at least close enough to gether to be indistinguishable to the human ear.
PS sound *is* actual matter hitting you.
That's an old passport then. Mine says I'm a British citizen. So did my last one.