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- From: izumi@pinoko.berkeley.edu (Izumi Ohzawa)
- Newsgroups: comp.sys.next.misc,comp.sys.next.hardware
- Subject: Re: NeXT DSP memory
- Date: 24 Nov 1992 02:37:09 GMT
- Organization: University of California, Berkeley
- Lines: 41
- Distribution: world
- Message-ID: <1es4glINNctc@agate.berkeley.edu>
- References: <1992Nov23.225548.16414@ringer.cs.utsa.edu>
- Reply-To: izumi@pinoko.berkeley.edu
- NNTP-Posting-Host: moica.berkeley.edu
-
- In article <1992Nov23.225548.16414@ringer.cs.utsa.edu> dan@ennex1.eng.utsa.edu (Daniel Shelton)
- writes:
- >In article <1992Nov23.172959.3855@pencom.com> ph@pencom.com (Patrick
- >Hester) writes:
- >> Does anyone know about adding DSP memory to a (non-turbo) 68040 cube?
- >> I've checked the FAQ but no mention of DSP memory.
- >> I'd like to pump up the DSP so I can have lots of synthesis going on at
- >> the same time.
- >> So if anyone knows how much memory can be added, what kind, where to
- >> get it, prices or any other clues, please let me know. Also if you
- >> happen to have an idea how extra memory will change the limits...
- >
- > You can add another 32K of memory, they will say 96K, but the DSP
- >memory is 24 bits wide so it is only 32K, to the DSP via a SIMM module
- >from NeXT for $195. Call them at 1-800-848-NeXT for details. Part
- >#N7013.
-
- It will NOT ADD 32kwords of memory -- N7013 will REPLACE the existing
- 8kwords of DSP RAM with 32kwords on a SIMM. So you end up with the
- total of 32kwords (96kbytes) after installation of N7013, not
- 40kwords = 8 (existing) + 32 (N7013). I suppose the 8k on the CPU
- board is disabled.
-
-
- Also, current 3.0 MusicKit from CCRMA will NOT use the expanded DSP RAM
- automatically. It is hardcoded for 8kwords (It has always been for
- previous releases). Therefore, installing N7013 will not automatically
- increase synthesis capacity of a NeXT. I believe you must obtain the
- MusicKit sources and change the hardcoded DSP RAM size (8k) and re-make
- the kit. Doc mentions that auto-detection of DSP RAM size is an item
- on the to-do list for future, but not yet supported.
-
- It is pretty simple to determine whether a NeXT has 8k or 32k of DSP
- RAM at run time, but you need to run a DSP program to do this.
- See DSPMemorySize.tar.Z on the archives.
-
- --
- Izumi Ohzawa [ $@Bg_78^=;(J ]
- USMail: University of California, 360 Minor Hall, Berkeley, CA 94720
- Telephone: (510) 642-6440 Fax: (510) 642-3323
- Internet: izumi@pinoko.berkeley.edu (NeXT Mail OK)
-