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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘History’ Category

Dutch daily weather data: KNMI – Daggegevens van het weer in Nederland

Posted by jpluimers on 2017/12/29

Cool data, in large parts suitable for statistical processing: [WayBack] KNMI – Daggegevens van het weer in Nederland

Thanks to Helga van Leur:




Posted in History, LifeHacker, Power User, science | Leave a Comment »

cyber- (prefix): (1) A linguistic cue informing the reader that the meaning of…

Posted by jpluimers on 2017/12/29

cyber- (prefix): (1) A linguistic cue informing the reader that the meaning of the word to follow should only be construed in the context of vaguely imminent threats and the need for more federal funding. (2) Something “computery.”

via: [WayBackcyber- (prefix): (1) A linguistic cue informing the reader that the meaning of…

Many more words are here:

The New Devil’s Dictionary: 249 words for the end of the world

[WayBackThe New Devil’s Dictionary


Posted in Fun, History, Quotes | Leave a Comment »

Historic storage prices: graphs and tables

Posted by jpluimers on 2017/12/18

[WayBack] retired Dr John C McCallum keeps historic information (prices, speeds, …) of computing stuff (storage, CPUs) since the 1950s on his web-site in table and graph forms:

What I like is the deviations in the graphs that show local phenomena.

This post is also a reminder to see what happened after this news item got published a year ago: [WayBack‘Prijzen ssd’s blijven komend kwartaal stijgen’ – Computer – Nieuws – Tweakers


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Crypto Museum (Amsterdam, 2016) – Google Photos

Posted by jpluimers on 2017/12/15

Last year Robin Sheat made this nice set of pictures: Crypto Museum (Amsterdam, 2016) – Google Photos



Posted in Encryption, History, Power User, Security | Leave a Comment »

MCL65 – a cycle exact 6502 in an FGPA

Posted by jpluimers on 2017/11/24

Cool stuff: [WayBackMCL65

MicroCore Labs MCL65 6502 core

The MC65 is an ultra-small footprint, microsequencer-based, 100% instruction-set compatible, cycle-exact NMOS 6502 core that can be implemented in any FPGA or ASIC technology which can utilize as little as 252 LUTs  (0.77%) of a Xilinx Spartan-7 FPGA. It has also been ported to a Xilinx Spartan-3 device where it uses about 10% of the part.

The MCL65 is instruction set compatible with the original NMOS version of the 6502 which was the processor used in computers and game machines such as the Commodore VIC20, Apple II, Atari-2600, and the Commodore-64 as well as  many others.

It runs inside an Apple ][ fine: see the below videos by MicroCore Labs

  • [WayBack] Download
  • [WayBack] MCL65 Working!: The MCL65 is currently running inside of a Commodore VIC-20 computer!  I have no game cartridges at the moment, so I am just running the classic a=a+1 BASIC counting program…
  • [WayBack] MCL65 running on VIC-20: Here are a few pictures of the MCL65 running on a VIC20. Video is available at MicroCore Labs YouTube Channel
  • [WayBack] MCL65 in a Spartan-3: Just ported the MCL65 to a Xilinx Spartan-3 board which contains an XC3S250E. 490 LUTs are used, which is 10% of the device.
  • [WayBack] MCL65 running on Atari 2600: The Atari 2600 just arrived in the mail, so replaced the MOS6507 CPU with the MCL65 core which is fitted the Xilinx Spartan-7 board and then to a 28-pin header for the 6507 package…
  • [WayBack] MCL65 works in Apple II+: Received the Apple II+ in the mail today but it did not come with any diskettes. I used a terrific tool, ADTPro, to transfer disk images from my PC over to the Apple using the cassette port…
  • [WayBack] MCL65 running Apple II+ Programs:I uploaded some videos of the system running a few applications and games. My hope was to test the MCL65 on a variety of programs that could demonstrate the instruction as well as cycle accuracy…



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Posted in 6502, History | Leave a Comment »

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