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Kernel level JIT? Didn't know, sounds cool. >Sounds familiar? I suppose you mean like Java and Python bytecode running on their VMs (of the language, not OS k

by vram22 11y ago

Kernel level JIT? Didn't know, sounds cool. >Sounds familiar? I suppose you mean like Java and Python bytecode running on their VMs (of the language, not OS kind). I've sometimes thought, as well as heard others say, that some of the tech advancements of earlier decades haven't been "re-invented" :) yet ...

pjmlp 11y ago
Actually I was thinking more about some Oberon versions that used a JIT, the way .NET is integrated into Windows, specially on the mobile since version 7. Also the way Java gets used on Android and other embedded platforms. Or the new deployment model for iDevices.
- vram22 11y ago
  Ah, Oberon. Don't know much about it. But do somewhat remember an interesting feature of it from a BYTE or other computer mag article: You could write a subroutine once and then have it available in the whole operating system - something like that. My description might not be right but I remember thinking the feature was powerful at the time.
  - pjmlp 11y ago
    Yes, that is correct. But the original idea was from Mesa/Cedar at Xerox PARC.
    - vram22 11y ago
      Didn't know, thanks. Also saw that you just posted a link to an article about Mesa on HN. Viewed it briefly. It says the Alto file system was written in "BPCL". Should that BCPL, a precursor of C? Had read a book it, by Martin Richards, IIRC, long ago. Good read. I think it had only one type - machine words. Fun to implement higher level stuff on such a base, though tedious by today's HLL standards.
      - vram22 11y ago
        https://en.wikipedia.org/wiki/BCPL https://en.wikipedia.org/wiki/BCPL C followed B which followed BCPL.
      - vram22 11y ago
        Just checked out Martin Richards' web site: http://www.cl.cam.ac.uk/~mr10/ http://www.cl.cam.ac.uk/~mr10/ (Richards invented BCPL.) He has an interpreter for BCPL. The page says: BCPL, an interpretive implementation of the BCPL language and system, including many demonstration programs. Click on BCPL.html to obtain a copy of the current version. This version can be installed easily on most machines running Linux, Windows and MAC OSX. In particular, it is easy to install this version on the Raspberry Pi machine. See the Young Person's Guide to BCPL Programming on the Raspberry Pi (bcpl4raspi.pdf) for details. His Wikipedia page: https://en.wikipedia.org/wiki/Martin_Richards_(computer_scientist) https://en.wikipedia.org/wiki/Martin_Richards_(computer_scie... says: He was awarded the IEEE Computer Society's Computer Pioneer Award in 2003 for "pioneering system software portability through the programming language BCPL".[9]
fowl2 11y ago
I think he's refering to things like Apple's "bitcode". http://lowlevelbits.org/bitcode-demystified/ http://lowlevelbits.org/bitcode-demystified/
- praseodym 11y ago
  Bitcode isn't JIT (yet); it simply allows Apple to compile binaries targeted at new devices or with newer compilers, without the developer having to do anything.

by vram22 11y ago

pjmlp 11y ago

Actually I was thinking more about some Oberon versions that used a JIT, the way .NET is integrated into Windows, specially on the mobile since version 7. Also the way Java gets used on Android and other embedded platforms. Or the new deployment model for iDevices.

vram22 11y ago
Ah, Oberon. Don't know much about it. But do somewhat remember an interesting feature of it from a BYTE or other computer mag article: You could write a subroutine once and then have it available in the whole operating system - something like that. My description might not be right but I remember thinking the feature was powerful at the time.
- pjmlp 11y ago
  Yes, that is correct. But the original idea was from Mesa/Cedar at Xerox PARC.
  - vram22 11y ago
    Didn't know, thanks. Also saw that you just posted a link to an article about Mesa on HN. Viewed it briefly. It says the Alto file system was written in "BPCL". Should that BCPL, a precursor of C? Had read a book it, by Martin Richards, IIRC, long ago. Good read. I think it had only one type - machine words. Fun to implement higher level stuff on such a base, though tedious by today's HLL standards.
    - vram22 11y ago
      https://en.wikipedia.org/wiki/BCPL https://en.wikipedia.org/wiki/BCPL C followed B which followed BCPL.
    - vram22 11y ago
      Just checked out Martin Richards' web site: http://www.cl.cam.ac.uk/~mr10/ http://www.cl.cam.ac.uk/~mr10/ (Richards invented BCPL.) He has an interpreter for BCPL. The page says: BCPL, an interpretive implementation of the BCPL language and system, including many demonstration programs. Click on BCPL.html to obtain a copy of the current version. This version can be installed easily on most machines running Linux, Windows and MAC OSX. In particular, it is easy to install this version on the Raspberry Pi machine. See the Young Person's Guide to BCPL Programming on the Raspberry Pi (bcpl4raspi.pdf) for details. His Wikipedia page: https://en.wikipedia.org/wiki/Martin_Richards_(computer_scientist) https://en.wikipedia.org/wiki/Martin_Richards_(computer_scie... says: He was awarded the IEEE Computer Society's Computer Pioneer Award in 2003 for "pioneering system software portability through the programming language BCPL".[9]

fowl2 11y ago

I think he's refering to things like Apple's "bitcode". http://lowlevelbits.org/bitcode-demystified/ http://lowlevelbits.org/bitcode-demystified/

praseodym 11y ago
Bitcode isn't JIT (yet); it simply allows Apple to compile binaries targeted at new devices or with newer compilers, without the developer having to do anything.