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- Xref: sparky comp.sys.next.programmer:5796 comp.sys.next.hardware:1504
- Path: sparky!uunet!sun-barr!ames!agate!agate!usenet
- From: izumi@pinoko.berkeley.edu (Izumi Ohzawa)
- Newsgroups: comp.sys.next.programmer,comp.sys.next.hardware
- Subject: DSP memory map with 96KB expansion kit ??
- Date: 26 Aug 1992 06:48:05 GMT
- Organization: University of California, Berkeley
- Lines: 33
- Distribution: world
- Message-ID: <17f9f5INN506@agate.berkeley.edu>
- Reply-To: izumi@pinoko.berkeley.edu
- NNTP-Posting-Host: moica.berkeley.edu
- Keywords: DSP, 56001, NeXT, memory map
-
- I want a DSP Memory Map that is equivalent to Appendix C of "Sound, Music, and
- Signal Processing: Reference" but with (N7013) DSP 96KB Memory Expansion Kit
- installed. 96KB corresponds to 32Kwords at 3 bytes/word for 56001.
-
- Does the expansion kit memory add to addresses immediately above the existing
- DSP RAM?
-
- You see, a stock NeXT has 8Kwords of RAM starting at 8K and go upto 16Kwords
- for Image-1. Image-2 for the same memory starts at $A000 which is 40Kwords.
- Now, the empty memory area to be filled is only (40-16) = 24Kwords.
-
- How is NeXT fitting the 32Kwords of expansion kit memory into the gap of 24Kwords?
- Where do the remaining 8Kwords go?
-
- Does the Expansion Kit memory replaces the existing RAM instead of adding to it?
- Or, gasp, does the 96KB expansion kit only contain 24Kwords (72KB) of memory,
- and "96KB" only refers to the total RAM after addition of the expansion kit?
- Someone should be shot if NeXT is calling a kit that contains 72KB of memory as
- "96KB" kit.
-
- Needless to say, I am totally confused on this, and I can't find any docs on it.
- Hardware.667 of NextAnswers is of no help.
-
- Please someone, just tell me the usable memory area for Image-1 after installation
- of the expansion kit. I don't have a couple of hundred $'s to ask help from NeXT,
- besides I don't want to pay for info that should have been the docs in the first place.
-
-
- --
- Izumi Ohzawa [ $BBg_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)
-