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NeXT DSP Memory Expansion Module
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balrog



Joined: 20 Jul 2010
Posts: 23

PostPosted: Thu Aug 12, 2010 10:44 am    Post subject: Reply with quote

I did some more research and it seems that the board thickness may be an issue. A 4-layer board from most fab houses would be about 1.2mm thicker than the original. A 2-layer design would probably be feasible, and flatpack SMT ICs may make it easier.

EDIT:

Does anyone have potentially useful information? I think pentium said something about this... any such information may be useful.
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pentium



Joined: 23 Jun 2006
Posts: 1137
Location: Kamloops, BC

PostPosted: Sun Aug 15, 2010 9:59 am    Post subject: Reply with quote

Rolling Eyes
There is like, five pages of content and links. Go back and read them and you will find all you need.
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balrog



Joined: 20 Jul 2010
Posts: 23

PostPosted: Sun Aug 15, 2010 10:25 am    Post subject: Reply with quote

pentium wrote:
Rolling Eyes
There is like, five pages of content and links. Go back and read them and you will find all you need.


Ohh I've read all that. I mean, any additional information that isn't here. Smile

I'm sure I can do without it, though.
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pentium



Joined: 23 Jun 2006
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Location: Kamloops, BC

PostPosted: Wed Aug 18, 2010 9:26 pm    Post subject: Reply with quote

This is all we got.
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NeXTnewbe



Joined: 27 Oct 2006
Posts: 274
Location: UK

PostPosted: Wed Oct 06, 2010 6:36 am    Post subject: Reply with quote

Hi

any news or updates about this topic
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sdinet



Joined: 25 Jun 2008
Posts: 184

PostPosted: Fri Oct 08, 2010 7:10 am    Post subject: Reply with quote

If someone is willing to donate a DSP simm, I can work with grant stokely (make of the altair and kenbak reproduction kits) to build a lot of these simms. It may cost a bit, so we would all need to split the costs.

Too bad I sold the only DSP simm I had 6 months ago =(
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NeXTsociety



Joined: 29 Nov 2007
Posts: 453
Location: Grass Valley, CA.

PostPosted: Fri Oct 08, 2010 9:14 am    Post subject: Reply with quote

This may be a dumb question but what would this device do for us? Sounds like it offers more memory to DSP functions but is the DSP that heavily used where we would see speed improvements someplace?

Just trying to understand what an upgrade like this would do for us commoners. Cool

tj
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pentium



Joined: 23 Jun 2006
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Location: Kamloops, BC

PostPosted: Sun Oct 10, 2010 11:14 am    Post subject: Reply with quote

sdinet wrote:
If someone is willing to donate a DSP simm, I can work with grant stokely (make of the altair and kenbak reproduction kits) to build a lot of these simms. It may cost a bit, so we would all need to split the costs.

Too bad I sold the only DSP simm I had 6 months ago =(


We have all the reference material we need to reproduse the SIMM here in the thread. That is about sa good as we are going to get when it comes to getting hold of a real SIMM.

We really don't know what it will do. Even I think it's really just a fun and novelty item.
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cubist



Joined: 20 Sep 2007
Posts: 244
Location: Cambridge, MA

PostPosted: Sun Oct 10, 2010 3:41 pm    Post subject: essential question Reply with quote

NeXTsociety wrote:
This may be a dumb question but what would this device do for us?


That's really the most important question. My recollection is that only the CCRMA MusicKit and some other custom stuff (perhaps IRCAM) will use the added memory. I may be wrong but that's the story I know.
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SlateBlue



Joined: 23 Aug 2015
Posts: 49

PostPosted: Mon Feb 06, 2017 2:24 pm    Post subject: Reply with quote

I'm bumping this thread thinking I may be able to help. In a lot of NeXT hardware and software I recently acquired was a DSP expansion kit that contained the module itself; it appears to have never been used.
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pentium



Joined: 23 Jun 2006
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Location: Kamloops, BC

PostPosted: Tue Feb 07, 2017 6:23 pm    Post subject: Reply with quote

You able to get an xray of the SIMM? Not much can be done for reverse engineering at this point without figuring out what that middle layer is doing.

Well okay, we CAN do extra homework and figure out where everything went but the xrays would make it much easier.
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SlateBlue



Joined: 23 Aug 2015
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PostPosted: Tue Feb 07, 2017 7:25 pm    Post subject: Reply with quote

Hmmm... my immediate answer is no. But, maybe I can figure something out.
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