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  • vol.litwr's Avatar
    Today, 07:16 AM
    vol.litwr replied to a thread PDP-11 π benchmark in DEC
    It is very interesting to get results from DEC Professional computers. Please help. The programs just measure performance of the pi-spigot...
    45 replies | 4703 view(s)
  • vol.litwr's Avatar
    March 29th, 2020, 11:37 AM
    vol.litwr replied to a thread PDP-11 π benchmark in DEC
    There is no any limit for OS. You can use any standard OS. If you call a standard OS feature stealing then it sounds very strange. Just check your...
    45 replies | 4703 view(s)
  • vol.litwr's Avatar
    March 28th, 2020, 09:48 PM
    vol.litwr replied to a thread PDP-11 π benchmark in DEC
    It was shown to you that the difference is below 0.8%. Please read again my information for you carefully. My 2.11BSD program for pi-spigot doesn't...
    45 replies | 4703 view(s)
  • vol.litwr's Avatar
    March 28th, 2020, 04:18 AM
    vol.litwr replied to a thread PDP-11 π benchmark in DEC
    The ER value uses only the separate CPU timing, I/O timing is ignored. It is thanks to your comments. However i/o timing for a case, when the 11/93...
    45 replies | 4703 view(s)
  • vol.litwr's Avatar
    March 28th, 2020, 03:13 AM
    vol.litwr replied to a thread PDP-11 π benchmark in DEC
    However the difference is actually almost invisible and RSX-11 results are a bit larger. What is wrong for you? Some things may be happened...
    45 replies | 4703 view(s)
  • vol.litwr's Avatar
    March 28th, 2020, 02:35 AM
    vol.litwr replied to a thread PDP-11 π benchmark in DEC
    It is just faster. It is a fact, not your speculations. ;) BTW it shows that a program under RT-11 works notably faster than under RSX-11 or 2.11BSD...
    45 replies | 4703 view(s)
  • vol.litwr's Avatar
    March 22nd, 2020, 07:08 AM
    vol.litwr replied to a thread PDP-11 π benchmark in DEC
    Thank you very much. The digits printed are digits of the famous pi number. :) Your results showed that the PDP11/Hack is about 10% faster than the...
    45 replies | 4703 view(s)
  • vol.litwr's Avatar
    March 22nd, 2020, 03:12 AM
    vol.litwr replied to a thread PDP-11 π benchmark in DEC
    Where can we find those actual tests? Dear bqt, you just don't want to understand very simple things. :( It is really very sad for me. :( The last...
    45 replies | 4703 view(s)
  • vol.litwr's Avatar
    March 15th, 2020, 01:51 AM
    vol.litwr replied to a thread PDP-11 π benchmark in DEC
    So such kind of texts is meaningless?
    45 replies | 4703 view(s)
  • vol.litwr's Avatar
    March 14th, 2020, 01:21 AM
    vol.litwr replied to a thread PDP-11 π benchmark in DEC
    You are totally wrong. Such measurements are used for ages and they are quite respectable. There are numerous tables with such measurements on the...
    45 replies | 4703 view(s)
  • lutiana's Avatar
    March 13th, 2020, 10:59 AM
    lutiana replied to a thread Covid-19 in General Off Topic
    School districts across the country are closing. By this time next week I'd say 80 - 90% of all schools will be closed.
    191 replies | 6577 view(s)
  • lutiana's Avatar
    March 10th, 2020, 09:22 AM
    My recommendation would be to go Ryzen, probably the Ryzen7 3700 or 3800, and then throw in a GTX-1060 or higher so you have access to the Cuda...
    26 replies | 1148 view(s)
  • vol.litwr's Avatar
    March 7th, 2020, 10:20 PM
    vol.litwr replied to a thread PDP-11 π benchmark in DEC
    Thank you very much. However I can't agree with your last point. Architectures are different but they build from the same logic components, which...
    45 replies | 4703 view(s)
  • vol.litwr's Avatar
    March 6th, 2020, 10:45 PM
    vol.litwr replied to a thread PDP-11 π benchmark in DEC
    Thank you very much. Sorry I am still not able to find that delay line on figure 4-27. :( I also can't find a frequency of MAN CLK L (FS1) line. ...
    45 replies | 4703 view(s)
  • lutiana's Avatar
    March 6th, 2020, 10:23 PM
    You're probably going to have a hard time selling it as one lot, especially since someone would have to come and get it all. That said, I am...
    6 replies | 792 view(s)
  • lutiana's Avatar
    March 6th, 2020, 10:07 AM
    The update you mention does not delete the files, it "hides" them, and getting them back has to do with some registry changes, this only affects a...
    12 replies | 641 view(s)
  • lutiana's Avatar
    March 6th, 2020, 09:20 AM
    What exactly did they remove that you are missing so badly? Their updates do not remove user data, or touch it in any way. If the update did this,...
    12 replies | 641 view(s)
  • vol.litwr's Avatar
    March 6th, 2020, 04:12 AM
    vol.litwr replied to a thread PDP-11 π benchmark in DEC
    According to wa2flq's remark the microcode executes on the 11/70 at 33.3 MHz. Is it true for the 11/34A? I have checked KD11EA maintance manual and...
    45 replies | 4703 view(s)
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About per

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February 19, 1992 (28)
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Western Norway

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Current systems owned by me:
Vintage:IBM PC/XT submodel 087 ( 1983 ), [Kon]tiki-100 rev. C (1983), Compaq Portable I ( 1984 ), IBM PC/XT submodel 078 ( 1985 ), IBM PC/XT286 ( ~1986 ), 3x Nintendo Entertainement Systems ( 1987 ).
Obsolete:Commodore A500 ( ~1990 ), IBM PS/2 model 70/386 type 8570-161 ( 1991 ), Atari Lynx II ( ~1992 ), Generic Intel 486SX PC ( ~1993 ), AT/T Globalyst Pentium w/FDIV bug MB ( 1994 ), Compaq 486DX4 laptop ( ~1995 ).

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