[Vm-dev] [ANN] ARM Stack VMs available

Ken Dickey Ken.Dickey at whidbey.com
Wed Nov 12 00:28:29 UTC 2014

On Sun, 9 Nov 2014 20:56:47 -0800
Douglas McPherson <djm1329 at san.rr.com> wrote:

> > The stkspurlinuxhtARM VM, however, complains:
> >  This interpreter (vers. 6521) cannot read image file (vers. 6505).
> > 
> > I presume some conversion is required to get the image into SPUR format?
> > 
> Yes, the Spur VMs require a new image format. There are recent Squeak trunk images in the spur format on Eliot’s site. I’ll let Eliot and others comment about how a Cuis image might be converted. 

I tried out the Squeak SPUR image from the Cog site and everything Squeak seems fine.

There is a timing bug with Cuis redraw that shows up on both the stklinuxhtARM vm and the one you sent me earlier. 

Basically, I am using DisplayObject>>slideFrom:to:nSteps:delay: to do some animation.  When multiple timer events fire during an animation it sometimes appears that the x,y redraw origin is used from the currently drawing morph's position, not 0,0.  I.e. part of the redisplay is offset.  [Display redraw via menu corrects the display].

This _only_ happens on the Samsung ARM Chromebook, never on Intel CPUs.  

My life is really, really busy right now, so I have never had time to dig into this.  I can redraw the display, so a workaround exists.

[One possible resource.  The Apache Portable Runtime, http://apr.apache.org/ , implements compareAndSwap and various other atomic operations across various OSs.]

I am happy to do quick tests, but must apologize for lack of time to dig into this.


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