[Vm-dev] Simulator tutorial

[Chris Cunnington]

Nothing will make me happier. This time next week this problem will be solved. 

Chris 
> On Apr 7, 2016, at 9:35 AM, Eliot Miranda <eliot.miranda at gmail.com> wrote:
> 
> Hi Chris,
> 
>     how about we meet v soon and u show you how straight forward it is, and you make a new video.  I feel frustrated (& worse; the phrase FUD comes to mind) to read messages like Ben's and your's, when the http://www.mirandabanda.org/cogblog/build-image/ <http://www.mirandabanda.org/cogblog/build-image/> page documents how to build a VMMaker image via a script, and when the built image includes a workspace with doits for launching the simulator in many configurations.
> 
> :-(
> 
> _,,,^..^,,,_ (phone)
> 
> On Apr 7, 2016, at 6:02 AM, Chris Cunnington <brasspen at gmail.com <mailto:brasspen at gmail.com>> wrote:
> 
>> I’m happy to see that people are still watching that video of mine. 
>> I made it work, sort of, by using very old images. I think it’s 2.2 or something. 
>> 
>> To my knowledge the simulator is broken and unusable. Like Alien FFI, it’s something you hear about, assume is a real thing, and then eventually find out it is not. In the hands of experts? Yes. But neither the simulator nor Alien is a mass market product. 
>> 
>> The simulator does not work with the Interpreter vm with any image. The simulator works for Cog if you are an expert. 
>> I’d be utterly fascinate if somebody could prove me wrong on this. I’d probably make a new video. 
>> 
>> Let me put it this way: 
>> https://www.youtube.com/watch?v=6-gJMs6DwuE <https://www.youtube.com/watch?v=6-gJMs6DwuE>
>> 
>> Chris 
>> 
>>> On Apr 7, 2016, at 8:53 AM, Ben Coman <btc at openinworld.com <mailto:btc at openinworld.com>> wrote:
>>> 
>>> 
>>> One of the advertised niceties is running the VM in a simulator.  I've
>>> been wondering for a while how to try it.  I found this ancient
>>> tutorial...
>>>  https://www.youtube.com/watch?v=2J1yjWtuwJU <https://www.youtube.com/watch?v=2J1yjWtuwJU>
>>> which saves current image as 'source.image'
>>> then in original image does...
>>>    (InterpreterSimulatorLSB new openOn: 'source.image') test
>>> as advised at 2:15, but I get "Error: basicNew: failed"
>>> at the line methodCache := Array new: MethodCacheSize.
>>> where MethodCacheSize is nil.
>>> 
>>> Is this still the correct way to invoke the simulator?
>>> 
>>> I tried also "(StackInterpreterSimulatorLSB new openOn: 'source.image') test"
>>> with same result.
>>> 
>>> If I use the example at the bottom of StackInterpreterSimulator class comment
>>> I get "Error: incomaptible image format"
>>> 
>>> Also btw, the class comment of SimulatorMorph references
>>> Simulator>>openAsMorph which doesn't exist. Should this be
>>> StackInterpreterSimulator?
>>> 
>>> I'm running on Linux-x86 platform.
>>> 
>>> cheers -ben
>> 

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