Dave,

I've been trying to get the latest sources but when I try:
svn co http://squeakvm.org/svn/squeak/trunk/platforms

I get:
svn: E020014: Can't find a temporary directory: Internal error

I've checked everything I can think of on my end (temp exists, has
permissions, and is not full) and a couple of search results indicate that
sometimes this might be due to a server error so just thought I'd ask if
you are able to pull a copy?

Thanks,
Phil

On Dec 18, 2017 8:46 PM, "David T. Lewis" <lewis at mail.msen.com> wrote:

> On Mon, Dec 18, 2017 at 04:50:29PM -0500, Phil B wrote:
> > Dave,
> >
> > I have been trying using a built classic VM (which works fine with 3.x
> > images but hangs on startup on every 1.x or 2.x image I've tried).  I
> last
> > built it from sources a year ago or more so I'll try downloading the
> latest
> > sources and try again.
>
> Yes please try it again. The enhancements to support older images with the
> classic VM were done in January 2017.
>
> >
> > It would be great to have this as an option for old images as the shipped
> > VMs from that time period seem have an annoying transparent window issue
> on
> > recent Linux distros so unless I put a black window behind the Squeak
> > window, it's very difficult to see what's going on (screenshot attached
> to
> > illustrate.).  Should anyone recalling the specifics of the VM builds
> back
> > then be reading: is this because true color depths weren't common back
> then
> > or is something else going on?
> >
>
> The change history is in http://source.squeak.org/VMMaker in package
> 'VMMaker',
> so you can browse the history with a Monticello browser.
>
> The recent updates that pertain to older image support are:
>
> ===
>
> Name: VMMaker-dtl.392
> Author: dtl
> Time: 12 January 2017, 8:34:22.25 pm
> UUID: 7c31d31d-9de0-4f45-89e2-6caa1886f12f
> Ancestors: VMMaker-dtl.391
>
> VMMaker 4.16.3
>
> Support very early images in which method context copy fails due to stack
> pointer not yet adjusted to position. For these images, disable stack limit
> bounds check. Based on SqueakJS implementation as described below.
>
> From: Bert Freudenberg <bert at freudenbergs.de>
> Date: Wed, 11 Jan 2017 17:10:24 +0100
> To: The general-purpose Squeak developers list <squeak-dev at lists.
> squeakfoundation.org>
> Subject: Re: [squeak-dev] Backward image and VM compatibility
>
> Some early images fill the context stack before advancing its stack
> pointer.
> I have a flag to allow that, it's pretty certainly used in primitive 61.
> Normally the VM does not allow access beyond the SP because there is
> garbage
> there (stack pops do not nil out the context slot):
>
> https://github.com/bertfreudenberg/SqueakJS/search?q=allowAccessBeyondSP
>
> But since the regular VM does not allow it, no image (except the really old
> ones) ever does it, so I just leave the flag enabled whenever "oldPrims" is
> in effect ;) Would be better if we could come up with a better way to
> identify
> these images.
>
> ===
>
> Name: VMMaker-dtl.391
> Author: dtl
> Time: 5 January 2017, 7:35:14.1 pm
> UUID: eb3fd060-b323-4a7d-9b06-b4b23f599fc8
> Ancestors: VMMaker-dtl.390
>
> VMMaker 4.16.2
>
> Old image support: Rescue five sound primitive assignments for
> updatePrimitiveTable
> for primitives that should be loaded from SouondGenerationPlugin, not from
> SoundPlugin.
>
> The following ancient primitives are still not loadable into the primitiive
> table for old image support:
>
>   #primWaveTableSoundmixSampleCountintostartingAtpan
>   #primFMSoundmixSampleCountintostartingAtpan
>   #primPluckedSoundmixSampleCountintostartingAtpan
>   #primSampledSoundmixSampleCountintostartingAtpan
>   #oldprimSampledSoundmixSampleCountintostartingAtleftVolrightVol
>
> In addition #primitiveReadJoystick does not load from JoystickTabletPlugin
> when running on Linux, but this is confirmed to be an artifact of the
> function
> loader, which abandons the attempt to load a module if #initialiseModule
> answers false, as is the case in the Unix stub code implementation (so it
> should work on platforms that do support the joystick plugin).
>
> ===
>
> Name: VMMaker-dtl.390
> Author: dtl
> Time: 2 January 2017, 8:52:00.539 pm
> UUID: 1fb628a6-18d2-4d86-b651-dc3b3d0cce69
> Ancestors: VMMaker-dtl.389
>
> VMMaker 4.16.1 - Support older Squeak images back to version 1.13 (circa
> 1996)
>
> This set of updates is based on SqueakJS as a reference implementation that
> supports a full range of images from Squeak 1.13 through the latest Spur
> images.
>
> Numbered primitives are identified in the primitive table, established by
> the
> implementations of #initializePrimitiveTable in the various images. Class
> PrimitiveTableHistory has been added to document known versions of the
> primitive table.
>
> Background: In general, primitives that originated as numbered primitives
> in early
> Squeak versions have been reimplemented as named primitives in the base
> interpreter and in various interpreter plugins. The goal is to reduce or
> eliminate
> use of numbered primitives. Support for old images therefore amounts to
> reassiging
> the old primitive numbers to named primitives where necessary to support
> running an older image.
>
> Strategy: Check if the current image #hasClosures based on the image format
> number, then provide an older set of numbered primitives suitable for a
> range of
> pre-closure images dating back to Squeak 1.13. Do this by starting with the
> default primitive table, checking at entry to interpreter() to see if this
> is a
> pre-closure image, then installing old primitives as needed in
> #updatePrimitiveTable.
>
> Interpreter primitives that require a primitive number for older images are
> added to the primitive table with #installPrimitive:at: and primitives
> that are now
> implemented in interpreter plugins are loaded and installed in the
> primitive
> table with #installPrimitive:from:at:.
>
> ===
>
> Name: VMMaker-dtl.389
> Author: dtl
> Time: 21 December 2016, 6:31:30.057 pm
> UUID: 3cce2df0-2d06-46f6-bed2-8946fb48c878
> Ancestors: VMMaker-dtl.388
>
> VMMaker 4.15.11
>
> Fix the interpreter for running images of the Squeak 3.6 and 3.8 era.
> Several
> obsolete primitives were removed in VMMaker-dtl.387, but these are still
> required for older images.
>
> For this update, the primitive table initialiation is unchanged, but a run
> time update is done for the ContextInterpreter to restore the old primitive
> assignments. It is not clear if this will be a good strategy but for now
> add
> InterpreterPrimitives>>installPrimitive:at: and use it to update the table
> on first entry to the interpret() loop.
>
> Possible future updates could support run time fixup to the primitive table
> for Squeak 3.2 and earlier images.
>
> ===
>
> Dave
>
>
>
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