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- From: fmlin@terapin.com (Frank M. Lin)
- Newsgroups: comp.sys.apple2
- Subject: 65816 based on new RISC chip??
- Message-ID: <fmlin.2ane@terapin.com>
- Date: 20 Nov 92 14:25:30 PST
- Organization: BBS
- Lines: 81
-
- I first heard about this chip in BYTE. This posts has a little more
- details... Does Zip know about it? It'll be really nice to see it be used
- on the GS. Or better yet, in the Avatar, which don't have the slow 1 mhz
- I/O limit.
-
- --------------------------------------------------------------------------
-
- #1458 comp.sys.next.hardware 3k
- From: bruce@pages.com (Bruce Henderson)
- Subject: New RISC chip / IMS 3250
- Date: 17 Nov 92 20:59:59 GMT
-
- OK,
-
- I can't say much about the chip because I am under non disclosure... But what
- I can say is this:
-
- The chip is the IMS 3250
- It is made by
- International Meta Systems, Inc.
- 23842 Hawthorne Blvd, #200
- Torrance, CA 90505
- Phone (310) 375-4700
- FAX (310) 378-7643
-
- Some gibblies on the chip:
-
- Superscaler RISC
- 2 instructions per clock peak, average of 1.5 instructions per clock
- Average 90 raw MIPS for the 60MHz part.
-
- Emulation
- On chip ROM contains 3250 native microcode, 80486 microcode, and 68040
- microcode.
- (There seems to be a lot more room on the ROM for other microcode
- chunks like SPARC, or custom instructions. Here's a teaser....
- What if an objective-C message pass (a somewhat computationally
- expensive thing) was a processor level thing, and say happened in
- 3 clocks? Or say they microcode a lot of mach low level stuff into
- silicon....)
-
- Other neat items...
- 1) The chip is only 50,000 gates... So it is small, and can
- esily fit in ASIC standard cells.
- (What does this mean? Well, say you had one of these things that
- was microcode tuned for Mach, and another for Display Postscript,
- and say another for DMA and another for I/O. Then you build an ASIC
- with 4 of these cells on it and put it in a NeXT. Think of all of
- the grunge the CPU no longer has to deal with.....)
-
- 2) Only dissapates 1.5 Watts, that isn't much so it may be rather
- useful for building things like NeXT poratbles or laptops.
-
- 3) IMS seems to be interested in a cost to vendors of around
- $45.00 per part. (as compared to the cost of a 50MHz 486...)
-
- So for more information, contact IMS. I don't work for them, but I do believe
-
- that there are ways that this chip could be used to improve performance of NeXT
-
- hardware. (Really.... 50,000 gates and loadable microcode...)
-
- Some of you are going to ask what the SPEC marks are, and that is the kind of
- stuff I can't talk about.... Sorry.
-
- I tend to think if this thing as a "Nano-processor" Meaning that you write
- some micro instructions for the little beast that makes it perfect of some
- meanial job like talking to hard disks or handling VM and then you burn it into
-
- a 100 pin flat pack ASIC and it makes your life easier.
-
- Hope this helps
-
- Bruce H (not Webster)
-
- PS. If you call, tell them you heard it from me.
- ----------------------------------------------------------------------
-
- frank m. lin
- fmlin@terapin.com
-
-