[squeak-dev] Backward image and VM compatibility

Javier Diaz-Reinoso javier_diaz_r at mac.com
Wed Dec 21 23:58:07 UTC 2016

The link in http://www.squeakvm.org/mac/ <http://www.squeakvm.org/mac/>:
> Squeak 4.2.5beta1U <http://www.squeakvm.org/mac/release/Squeak%204.2.5beta1U.zip>is for the last original Mac interpreter, this can only open the old images (no closures), there is a 4.2.5b2 version in:

> http://squeakvm.org/~lewis/MacOS-test-Javier/ <http://squeakvm.org/~lewis/MacOS-test-Javier/>
with I recompiled for David Lewis with the then (Sep/2014) updated VMMaker, this version can open the old images and also the Cog images.

> On 21 Dec 2016, at 18:17, Bob Arning <arning315 at comcast.net> wrote:
> Is the current interpreter VM (for the mac) one of the ones on http://www.squeakvm.org/mac/ <http://www.squeakvm.org/mac/>? I'm not clear how to parse the names of things into what they can or cannot do.
> On 12/21/16 5:56 PM, David T. Lewis wrote:
>> On Wed, Dec 21, 2016 at 05:15:29PM -0500, Bob Arning wrote:
>>> Is there a specific oldest image which current VMs are expected to run?
>> A current interpreter VM should run a Squeak 3.2 image, although with some
>> problems. It should be able to run images from the Squeak 3.6 and 3.8 era
>> without problems. And it should run anything else up to but not including Spur.
>> Dave
>>> On 12/21/16 11:38 AM, David T. Lewis wrote:
>>>> Following up on this, the backward compatibility for interpreter VM 
>>>> supporting
>>>> old images was broken in VMMaker-dtl.387 of 8 November 2016, due to my 
>>>> attempt
>>>> to align the primitive table closer to Cog/Spur:

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