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5.38 How to expand DSP memory?

The Speech Recognition Lab at San Francisco State University has developed a DSP memory expansion board for the NeXT computer that provides the maximum memory supported by the DSP56001 processor. We are now offering this board to those whose are interested in high-performance custom DSP development.

• The board is a 576KB DSP expansion memory board organized as three non-overlapping 192KB banks: X-data, Y-data and Program. The board uses relatively fast (<35ns) SRAM. This board compares with NeXT's DSP memory expansion board, which offers only 96KB in an imaged memory configuration.

• The board is a high-quality, 4-layer board, open-circuit tested prior to assembly. It fits into the DSP memory daughterboard slot on all NeXT machines.

• The price will be $600. Please let us know if you are interested. Delivery will be in about 3-4 weeks.

• Contact Tom Holton (th@ernie.sfsu.edu). E-mail is preferred. The address is: Tom Holton Division of Engineering San Francisco State University 1600 Holloway Avenue San Francisco, CA 94132 415 338 1529 (phone) 415 338 0525 (fax) NOTE: Because we've organized our memory as three separate (non-overlapping) banks (X, Y and P) of 192KB apiece, none of the DSP memory image functionality provided by NeXT with its existing 8K base configuration, or its 96KB DSP expansion module is supported. While we cannot guarantee that every existing DSP application ever written will be plug-and-play compatible with our DSP expansion memory, we are not aware of any existing applications that use the image functionality. The MusicKit, and demo programs that use the DSP, such as Mandlebrot and ScorePlayer, work fine with our memory module.

• (weiter mit 5.39 How to boot a NeXT without a monitor?)