DSP Cache memory upgrades?

Started by helf, April 05, 2007, 02:13:35 pm

Previous topic - Next topic

Nitro

I received a reply back from Julius O. Smith about the NeXT RAM module.

Quote from: "Nitro"
Hi Julius,

I'm trying to design a clone of the NeXT DSP RAM Expansion Module (part number N7013) for original NeXT Black Hardware.  I don't have a schematic of the module (or an actual module), just some chip numbers.  I know it was a long time ago, but would you happen to have any information or schematics of the NeXT RAM module or the 576Kb unit built by San Francisco State University?  I know it's a long shot, but I thought I would ask.  I'm not an Electrical Engineer, so I need all the help I can get. :)  Thanks very much for your time.

Regards,

Nitro



Quote from: "Julius O. Smith"
Hmmm, that's an odd one.  Can't you just figure it out from the DSP56000 data book?  If it's the one I had, it just used the same address space.  There was one feature whereby it could be used either as two banks or as one big memory from either x or y.  Do you just need the memory map for that?  It's probably documented in the DSP source code at least.

Julius O. Smith III <e-mail address removed>
Prof. of Music and Assoc. Prof. (by courtesy) of Electrical Engineering
CCRMA, Stanford University
http://ccrma.stanford.edu/~jos/


I'm currently uploading all of the DSP56001 documentation that I have to the following location:

http://www.nextcomputers.org/NeXTfiles/Docs/Audio/DSP56001/
Nitro