[Vm-dev] Setting the Cog bit

David T. Lewis lewis at mail.msen.com
Wed Jun 23 02:47:25 UTC 2010

On Tue, Jun 22, 2010 at 07:07:48PM -0700, Eliot Miranda wrote:
> On Tue, Jun 22, 2010 at 6:52 PM, David T. Lewis <lewis at mail.msen.com> wrote:
> > Does the Cog VM update to a new image format version number when
> > snapshotting?
> Yes it does.  It and the Stack VM set the image format to 6505.  This
> reflects the platform-order floats change which is not backwards-compatible.
> Note that Cog also insists on a 6504 or 6505 format image to start-u, i.e.
> it won;t attempt to start-up non-closure images.
> > If not, then I have the following proposal:


> :)  Looks like I accidentally chose the right bit :)

Perfect. In any case, I stand by my proposal to name it the "Cog bit".
I feel confident in predicting that 30 years from now, folks will be
spinning tall tales to explain the true origins of the Cog bit.


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