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Re: question: in order to use java on/in a graphics card

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On 23/08/2015 16:18, gdotone@gmail.com wrote:
> question: in order to use java on/in a graphics card, where java is directly producing the action of the card, the card must have a JVM to produce byte code the the graphics processor can deal with?
>

Interesting question

Imagine a grossly oversimplified computer with 3 layer architecture, 
there is software at each layer. We also ignore VM optimisations like 
JIT compilation etc.

Top layer is the application layer, this is where the programs you use 
day to day exist.

Middle layer is the driver layer, a driver is the (bi directional)
software interface between the application layer and the hardware 
device. (we are ignoring the operating system but who needs one of those 
anyway :-))

The hardware layer contains software that drives the device, usually 
stored in some kind of ROM, sometimes a PLA sometimes flashable etc

Java is an interpreted language, bytecode is directly executed by a 
virtual machine, when a VM sees a bytecode instruction, it 'looks up' 
the relevant machine instruction for the underlying platform it is 
currrently running on and this is what gets executed by the hardware. 
Java bytecode is not directly executed by the hardware on the hardware 
device

So, presumably you want to write the ROM resident code in Java. I can't 
see how this would work as sooner or later something is going to have to 
translate the bytecode into directly executable code and this something 
would have to produce the 'binary' bytes that is directly executable by 
the hardware. Java doesn't do this so you would 'probably' use C or 
assembler to produce the 1s and 0s (if you like) that will cause the 
device to actually do it's thing.

So, no, I don't think it's possible to expunge all traces of C and/or 
assembler, or rather the executable output thereof from the device.

As always, I await correction and chastisement


-- 
Laughing Spam Fritter

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question: in order to use java on/in a graphics card gdotone@gmail.com - 2015-08-23 08:18 -0700
  Re: question: in order to use java on/in a graphics card Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-08-23 13:43 -0400
    Re: question: in order to use java on/in a graphics card gdotone@gmail.com - 2015-08-23 10:58 -0700
      Re: question: in order to use java on/in a graphics card Thomas Richter <thor@math.tu-berlin.de> - 2015-08-23 20:05 +0200
        Re: question: in order to use java on/in a graphics card "g.g." <gdotone@gmail.com> - 2015-08-23 11:19 -0700
          Re: question: in order to use java on/in a graphics card Thomas Richter <thor@math.tu-berlin.de> - 2015-08-24 09:15 +0200
            Re: question: in order to use java on/in a graphics card Haddock <ffm2002@web.de> - 2015-08-25 02:30 -0700
              Re: question: in order to use java on/in a graphics card gdotone@gmail.com - 2015-08-25 13:02 -0700
                Re: question: in order to use java on/in a graphics card gdotone@gmail.com - 2015-08-25 13:03 -0700
      Re: question: in order to use java on/in a graphics card Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-08-23 16:03 -0400
  Re: question: in order to use java on/in a graphics card Eternal Hope <laughingspam99@gmail.com> - 2015-08-23 21:26 +0100
    Re: question: in order to use java on/in a graphics card Martin Gregorie <martin@address-in-sig.invalid> - 2015-08-23 21:38 +0000

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