There are two groups of next generation DVD which are battling to win as standard for next generation DVD. One group with Sony and Philips as ones of its members is proposing Blu-Rays, another one while Toshiba and others is proposing HD-DVD. To summarize the differences between them, I put a table here:
HD-DVD
Standardization Body www.dvdforum.org
Key Hardware Supporters Toshiba, NEC, Sanyo
Key Hollywood Studio Backers Paramount, New Line, Universal, Time Warner
ROM Capacity 15 GB (SL), 30 GB (DL)
Laser Pickup Blue Laser
Numerical Aparture of Lens 0.65
Design Emphasis Download compatibility with existing DVD standard
CODEC MPEG-2, ITU H.264 (AVC), VC-1
Copy Protection Advanced Access Content System (AACS)
Interative Software Based on derivative of Microsoft's MSTV
Blu-Ray
--------
Standardization Body www.blu-raydisc.com
Key Hardware Supporters Sony, Hitachi, LG, Mitsubishi, Panasonic, Pioneer,
Philips, Samsung, Sharp, Thomson, Apple, Dell, HP
Key Hollywood Studio Backers Sony Pictures, Tri-Star, Disney, MGM
ROM Capacity 25 GB (SL), 50 GB (DL)
Numerical Aparture of Lens 0.85
Design Emphasis Larger Storage Capacity
CODEC MPEG-2, ITU H.264 (AVC), VC-1
Copy Protection Advanced Access Content System (AACS)
Interative Software Based on Java-based MHP/GEM
Tuesday, May 3, 2005
Sunday, May 1, 2005
AMD Clock and Voltage
After almost a month having the laptop, I have not been able to make my R3000Z laptop utilize the maximum clock frequency and voltage allowed on the CPU. So far, I have downloaded AMD PowerNow Deskboard to monitor CPU utilization, clock and its voltage. It keeps using 36% of the maximum CPU speed. The voltage has been hanging at 1.1 volts. Although, this really saves the batteries alot (90%).
I tried Rightmark CPU Clock Utility. I could pump up the clock and voltage automatically, or by manual. By so far, why the pre-installed AMD driver could not adjust frequency and clock to what I want. I tried to overload the CPU with a lot of processes, but still no change.
I tried Rightmark CPU Clock Utility. I could pump up the clock and voltage automatically, or by manual. By so far, why the pre-installed AMD driver could not adjust frequency and clock to what I want. I tried to overload the CPU with a lot of processes, but still no change.
Sunday, April 10, 2005
Compaq Presario R3000Z
Last week my order of new laptop I ordered from hpshopping.com arrived. It is Compaq Presario R3000Z with AMD64 3400+ MHz processor, WinXP home edition, 1 GB RAM, 80 GB 5400 RPM harddisk, 12 cell battery, 54g broadcom wifi + bluetooth, 64 MB Nvidia 440 Go, and 12680x1050 screen resolution. Not bad at all for total 1460 USD which I got 12 months interest-free loan from HP. The price is Employee Promotion Program as my employer has special with HP for their employees.
I did some tests such as leaving the closing and reopening the lid, ethernet (wired) link and wifi. They went OK, although sometimes the wifi interfered with my Linksys PCMCIA card that was on my another laptop (Tecra 8000. See my other blog about where and when I got this free laptop :-).
After a few days trying and installing some applications, I then repartitioned the harddisk using Norton's Partition Magic 8.0. I partitioned about 12 GB for Linux, 512 MB for its swap disk. I used Novell SuSe Linux Pro 9.2 for the Linux. Most of the hardware got detected (I was suprised that the touchpad even did work. I read somewhere on the Internet, the guy said it was kinda hard to make the touchpad work, but it was OK on my Linux. Perhaps because I use SuSe Linux 9.2?). For the wifi, as usual Broadcom does not provide the driver for Linux, but thanks to Ndiswrapper it could use the driver from Windows instead. But I still have problem even with ndiswrapper. Somehow, dhcp client could not get IP address, although the Wi-Fi recognized and found my Access Point (which is Netgear 802.11b) and found its MAC Address. I am not sure whether this is because of the kernel I use (oh, forget to mention that SuSE 9.2 comes with kernel 2.6.9, so I upgrade the kernel to the latest at this time, 2.6.11.7)
When I compiled the kernel and ndiswrapper, I used all the processor-specific optimizations by defining the environment variable CFLAGS and CPPFLAGS. My CFLAGS contains "-mcpu=athlon64 -mfpmath=sse -msse3 -m3dnow -m64 -mthreads", so is CPPFLAGS. No errors during compilation and everything went well. But I was still wondering why gcc could not recognize -m64 when I tested by creating a small C program and compiled it with CFLAGS as above?
The laptop's software packages come with Microsoft Works (not bad for many daily simple uses), Microsoft Money 2005 Standard Edition, InterDVD 4, RecordNow! CD&DVD burning software, Muvee Autoproducer and some other programs. Yes, I custom ordered the laptop with dual layer DVD writer.
The most I like from the laptop is its screen. It's so cool!. It is WSXGA 15'4 in screen, so it is so bright and displayed fonts are so crispy and bold. Even on Linux (which I set the resolution also to its maximum allowed, 1680x1050), it really rocks!
The processor uses powerNow technology from AMD. During normal use (which takes most of the time), the clock is adjusted to low (about 700 MHz). According to AMD spec, the maximum clock on Athlon64 3400+ Mobile is 2.2 GHz. But I haven't been able to test to make the processor reach its maximum speed. I think when it is rendering video it may go to that speed. When the CPU increases its CPU clock, the laptop gets hotter and this will trigger the CPU fan to blow the hot air. So far, I have not experienced the laptop goes too hot. May be if I am running Doom3 or Half-Life 2?
What think I don't like from the laptop is its weight. It is 2 times heavier than my IBM T40 laptop at-work. Well, what the heck, I don't really intend to use this laptop for mobile, but mostly to make me more flexible wanding around with it and still be able to do my hobby (hacking :-)
Overall, I love this laptop. I really recommend this for people are seeking a balance between budget and performance. Besides, it supports 64-bit processing, so when Microsoft finally releases its WinXP officially we still are not behind and not need to upgrade our hardware so the workhorse can still be used for few years (until IA32 finally obsoletes and a new architecture comes).
I did some tests such as leaving the closing and reopening the lid, ethernet (wired) link and wifi. They went OK, although sometimes the wifi interfered with my Linksys PCMCIA card that was on my another laptop (Tecra 8000. See my other blog about where and when I got this free laptop :-).
After a few days trying and installing some applications, I then repartitioned the harddisk using Norton's Partition Magic 8.0. I partitioned about 12 GB for Linux, 512 MB for its swap disk. I used Novell SuSe Linux Pro 9.2 for the Linux. Most of the hardware got detected (I was suprised that the touchpad even did work. I read somewhere on the Internet, the guy said it was kinda hard to make the touchpad work, but it was OK on my Linux. Perhaps because I use SuSe Linux 9.2?). For the wifi, as usual Broadcom does not provide the driver for Linux, but thanks to Ndiswrapper it could use the driver from Windows instead. But I still have problem even with ndiswrapper. Somehow, dhcp client could not get IP address, although the Wi-Fi recognized and found my Access Point (which is Netgear 802.11b) and found its MAC Address. I am not sure whether this is because of the kernel I use (oh, forget to mention that SuSE 9.2 comes with kernel 2.6.9, so I upgrade the kernel to the latest at this time, 2.6.11.7)
When I compiled the kernel and ndiswrapper, I used all the processor-specific optimizations by defining the environment variable CFLAGS and CPPFLAGS. My CFLAGS contains "-mcpu=athlon64 -mfpmath=sse -msse3 -m3dnow -m64 -mthreads", so is CPPFLAGS. No errors during compilation and everything went well. But I was still wondering why gcc could not recognize -m64 when I tested by creating a small C program and compiled it with CFLAGS as above?
The laptop's software packages come with Microsoft Works (not bad for many daily simple uses), Microsoft Money 2005 Standard Edition, InterDVD 4, RecordNow! CD&DVD burning software, Muvee Autoproducer and some other programs. Yes, I custom ordered the laptop with dual layer DVD writer.
The most I like from the laptop is its screen. It's so cool!. It is WSXGA 15'4 in screen, so it is so bright and displayed fonts are so crispy and bold. Even on Linux (which I set the resolution also to its maximum allowed, 1680x1050), it really rocks!
The processor uses powerNow technology from AMD. During normal use (which takes most of the time), the clock is adjusted to low (about 700 MHz). According to AMD spec, the maximum clock on Athlon64 3400+ Mobile is 2.2 GHz. But I haven't been able to test to make the processor reach its maximum speed. I think when it is rendering video it may go to that speed. When the CPU increases its CPU clock, the laptop gets hotter and this will trigger the CPU fan to blow the hot air. So far, I have not experienced the laptop goes too hot. May be if I am running Doom3 or Half-Life 2?
What think I don't like from the laptop is its weight. It is 2 times heavier than my IBM T40 laptop at-work. Well, what the heck, I don't really intend to use this laptop for mobile, but mostly to make me more flexible wanding around with it and still be able to do my hobby (hacking :-)
Overall, I love this laptop. I really recommend this for people are seeking a balance between budget and performance. Besides, it supports 64-bit processing, so when Microsoft finally releases its WinXP officially we still are not behind and not need to upgrade our hardware so the workhorse can still be used for few years (until IA32 finally obsoletes and a new architecture comes).
Saturday, April 2, 2005
How Physicists contributed to the Internet
Many people don't realize that their daily internet life has been affected more or less by works from physicists. Do you know who is the inventor of word-wide-web (HTTP, HTML and URL things)? Tim Berners-Lee, and he was a physicist working at CERN in europe. One of the gurus in TCP? Van Jacobson, who was working in high energy physics at Berkeley's Lawrence Laboratory.
I believe many physicists did contribute for the improvement and inventions of the current TCP/IP and other protocols currently in use.
I believe many physicists did contribute for the improvement and inventions of the current TCP/IP and other protocols currently in use.
Wednesday, March 23, 2005
Computer Reuse Through Linux
One day I found a laptop dumped in recycle bin at my office. It is Toshiba Tecra 8100 with Pentium3 450 MHz, 64-MB RAM and 12 MB harddisk. It had Windows NT in it. I took it home, reformatted it with my SuSE Linux 9.2. Well, the memory seemed not enough, so I went to ebay.com and found somebody was selling the 128 RAM SIMM100 for around 20 bucks. Not bad, I though. So I bought it and installed it on the laptop.
I got 192 MB now so I could run the GUI (I use KDE, but also added many GNOME libraries to run GNOME-based applications). I then downloaded the latest kernel available at that time (2.6.10). I also bought Cisco Linksys PCMCIA WLAN card (WPC54 SpeedBooster). Unfortunately, Linksys has not provided the driver for Linux yet, but luckily there is ndiswrapper downloadable somewhere. So I copied the driver for Windows to my Linux, run the ndiswrapper and ...voila, the wireless card worked. Well, still had problem here. Apparently, there was a conflict between ndiswrapper and ndiswrapper. I rebuilt the kernel and disabled sound drivers, but still sporadically the ndiswrapper did work very well (sometimes, the WLAN lost connection). For your info, I rebuilt them with specific processor criterias enabled, such as mcpu=pentium3 -msse and mfpmath=sse.
A few days I go, I gave a try to use kernel 2.6.11.5. I even rebuilt Krolltech's QT and many libraries. After many days of recompiling, I successfuly made the wireless work with sound drivers. I was one of the happiest days in my life making reuse the old laptop. I have been using the laptop for many of my daily activities, including browsing, reading emails and even a lightweight server. Yes, it is a server. Imagine if I use Windows for this purpose, I might have burned the laptop to the hell for its slowiness.
The laptop has SSH server, FTP, Telnet and many other services. I even also connect my external USB harddrive, thus I got additional 12 GB of space for storage. Not bad at all.
At work, I also partition my other laptop (it is IBM T30 with 512 MB RAM and 40 GB of total space). I parition 6 GB for Linux, and the rest for Windows 2000. You know what? I ended up using Linux for my work activities almost everyday. Linux is really cool, and I have learned a lot about many things because of opensource applications and tools available from the internet.
I really thank people outthere who have developed such great operating systems, applications and tools.
I got 192 MB now so I could run the GUI (I use KDE, but also added many GNOME libraries to run GNOME-based applications). I then downloaded the latest kernel available at that time (2.6.10). I also bought Cisco Linksys PCMCIA WLAN card (WPC54 SpeedBooster). Unfortunately, Linksys has not provided the driver for Linux yet, but luckily there is ndiswrapper downloadable somewhere. So I copied the driver for Windows to my Linux, run the ndiswrapper and ...voila, the wireless card worked. Well, still had problem here. Apparently, there was a conflict between ndiswrapper and ndiswrapper. I rebuilt the kernel and disabled sound drivers, but still sporadically the ndiswrapper did work very well (sometimes, the WLAN lost connection). For your info, I rebuilt them with specific processor criterias enabled, such as mcpu=pentium3 -msse and mfpmath=sse.
A few days I go, I gave a try to use kernel 2.6.11.5. I even rebuilt Krolltech's QT and many libraries. After many days of recompiling, I successfuly made the wireless work with sound drivers. I was one of the happiest days in my life making reuse the old laptop. I have been using the laptop for many of my daily activities, including browsing, reading emails and even a lightweight server. Yes, it is a server. Imagine if I use Windows for this purpose, I might have burned the laptop to the hell for its slowiness.
The laptop has SSH server, FTP, Telnet and many other services. I even also connect my external USB harddrive, thus I got additional 12 GB of space for storage. Not bad at all.
At work, I also partition my other laptop (it is IBM T30 with 512 MB RAM and 40 GB of total space). I parition 6 GB for Linux, and the rest for Windows 2000. You know what? I ended up using Linux for my work activities almost everyday. Linux is really cool, and I have learned a lot about many things because of opensource applications and tools available from the internet.
I really thank people outthere who have developed such great operating systems, applications and tools.
Thursday, March 3, 2005
Got Answer from one of the 'Hacker'
A few weeks ago I modified an article about SHA-1 on www.wikipedia.org by adding a link to another page telling a brief biography about one of the SHA-1 hackers, a chinese researcher name Xiaoyun Wang. After a few minutes, somebody removed the link and even the new page I added due to infringement of copyrighted materials.
I was suprised, but then I sent email to the researcher asking wether she objects my writing. I got a reply few days later saying that her team and the university (Shandong University of China) are going to create a new website dedicated to this security stuff. Well, she did not really answer my questions, but at least I got a response from an expert and Ph.D in security.
Let's wait and see how their website and papers will look like.
I was suprised, but then I sent email to the researcher asking wether she objects my writing. I got a reply few days later saying that her team and the university (Shandong University of China) are going to create a new website dedicated to this security stuff. Well, she did not really answer my questions, but at least I got a response from an expert and Ph.D in security.
Let's wait and see how their website and papers will look like.
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