My place to post silly pictures and rants, even though I’m no longer a PhD-student.
Tuesday, August 29, 2006
Monday, August 28, 2006
Saturday, August 19, 2006
Composite Sync
So, I have this nice monitor, a SUN GDM20D10 which relates to a old Sun workstation that is dog-slow by todays standards and which I therefore no longer use for anything. I had built a adapter-cable for it's strange connector a long time ago, but never found a graphics card that outputs composite sync signals.
Those sync signals tell your monitor when it has to start drawing a new line, or when it has to begin at the top of the screen after it has reached the bottom and todays PCs usually carry those signals on separate lines. And because SUN monitors are different, they want those signals merged together on a single input pin which my graphics cards is not able to provide. (Well, it is, but there is currently no simple way to tell it to do so).
I always planned to build one of the circuits whose schematics you can find on the web for that purpose, but always forgot buying the necessary parts. Now while cleaning up the cellar, I stumbled upon that lonely 47LS00 you can see soldered to the white cables and held by the oscilloscope probes.
Granted, my VGA connector now looks a little bit odd, but finally it sends something looking almost like a good composite sync signal onwards to the CRT.
And it's good enough to persuade the monitor to display something (and not just turn off and going into power-save-mode).
Finally, no more tiny icons and blurry text on that old and crappy 17"-tube. That makes me happy.
Granted, my VGA connector now looks a little bit odd, but finally it sends something looking almost like a good composite sync signal onwards to the CRT.
And it's good enough to persuade the monitor to display something (and not just turn off and going into power-save-mode).
Finally, no more tiny icons and blurry text on that old and crappy 17"-tube. That makes me happy.
Wednesday, August 16, 2006
Bruce Schneier Facts
Ok, you have probably seen this already, but it's just too good to take the chance you'll miss it: Bruce Schneier Facts, which is a parody on Chuck Norris Facts, which itself is a parody on Chuck Norris.
Update: The exhaustive list has been posted in Bruce Schneier's Blog
Thursday, July 27, 2006
Computer Ticket
Desert Climate
Because of the hot weather here in germany, the HERA accelerator has problems dissipating all the heat the overdesigned and energy wasting machinery generates.
All provisions to reduce the cooling-water temperature have been exhausted. Feedback transmitters are off, circumfence-voltage is down to the bare minimum and the HF-power has been moved to the west . Mr. Hurdelbrink has (developed?) operation-modes for winter and summer, but not for desert climate.
Monday, July 24, 2006
Saturday, July 15, 2006
Thursday, July 13, 2006
T-Mobile tries to pull a fast one.
So I get a phonecall from my friendly T-Mobile user-care-agent, a very friendly saxony-accent woman who is tremendously grateful that I'm a loyal customer since 5 years. And to thank me for my loyalty, they want to offer me a extra SIM-card for my mobile phone which I can give to friends or family members.
I ask her if that's the same offer another friendly, saxony-accent woman, who was very grateful for my loyalty, made me half a year ago, the one with the minimum turnover of 8 EURO or so?
But no, this time, it's completely different. That card is and does NOT have any minimum takeover. Quite the contrary, for 7 EUR per month I get 20 minutes of call-time!
Unfortunately she was not able to explain the difference between the two offers in a way I could understand and I politely rejected her offer and wished her a nice day. She ended the call by assuring me that she noted the fact that I'm not interested. Just as the other friendly woman with the saxony accent had told me half a year ago.
Tuesday, July 11, 2006
Office Temperature 30°C
Monday, June 26, 2006
Holes
I just want to use the opportunity to direct the valued readers of this blog to the Wikipedia entry regarding holes. There are always too many where you don't need any, and when you desperately need them they are not there. Be wise and keep some Portable Holes in stock.
Tuesday, June 06, 2006
1st time on the berg
Monday, June 05, 2006
IPSEC
Jun 5 21:12:55 entropy racoon: INFO: IPsec-SA established: ESP/Transport 192.168.1.36[0]->192.168.2.33[0] spi=254685122(0xf2e2fc2)
21:21:20.338991 IP 192.168.1.36 > 192.168.2.33: AH(spi=0x07252808,seq=0x6): ESP(spi=0x0f2e2fc2,seq=0x6), length 76
21:21:20.339403 IP 192.168.2.33 > 192.168.1.36: AH(spi=0x723baa29,seq=0x8): ESP(spi=0x29eed679,seq=0x8), length 76
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I played around with IPSEC today, it's quite some fun after you have found out all the rough edges :-). But now, hooray, ipsec between the windows-notebook and one linux-machine.
Sunday, June 04, 2006
golden cone
Thursday, June 01, 2006
Very bad code.
Just had a look at legacy code that spans several pages in this style:
DO 13 K = 1,N
Z(6) = U(K,I)
U(K,I) = Z(5) * Z(6) - Z(4) * U(K,J)
U(K,J) = Z(4) * Z(6) + Z(5) * U(K,J)
IF(K .EQ. I .OR. K .EQ. J) GOTO 13
H(I,K) = Z(5) * H(K,I) - Z(4) * H(K,J)
H(J,K) = Z(4) * H(K,I) + Z(5) * H(K,J)
H(K,I) = H(I,K)
H(K,J) = H(J,K)
13 CONTINUE
All variables have 1 or two characters and it is full of magic constants and meaningless array indices.
Thursday, May 18, 2006
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