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- Path: clri6a.gsi.de!kraemer
- From: kraemer@clri6a.gsi.de (Michael Kraemer)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: DEC Alpha Feasable for A4000?
- Date: 29 Jan 1996 12:18:43 GMT
- Organization: Technische Hochschule Darmstadt
- Message-ID: <4eidv3$dpn@rs18.hrz.th-darmstadt.de>
- References: <DLwLJK.BC1@lazrus.cca.rockwell.com>
- NNTP-Posting-Host: clri6a.gsi.de
-
- In article <DLwLJK.BC1@lazrus.cca.rockwell.com>, sac@cca.rockwell.com (Scott Cabit) writes:
- >
- >
- > This question is for Dave Haynie or any other knowledgable
- > Amiga hardware people. I have heard rumor of a new DEC ALPHA
- > card which will be installable in the Zorro III slot of any
- > A4000. This card is supposed to simulate a math co-processor
- > via an Amiga library and allow tremendous speedup of current
- > software which requires math intensive operations (most notably
- > LightWave and other rendering software).
- > My question is, is this technically feasable or is someone
- > just starting a new rumor? If it can be done, what limitations
- > would the system impose on throughput to the Alpha?
-
- (Sorry, I'm neither Dave Haynie nor a knowledgable person).
- On the basis of some sort of mathieeedoub*.library I'd say forget it.
- The parameter and result passing is based on 68k registers and this would
- take more cycles than the mere calculation itself. Not to forget that the
- Alpha is a 64bit processor and has Intel-style byte sex.
-
- So existing software wouldn't make use of the "coprocessor".
-
- The only mechanism I can imagine is some sort of device to which you pass a heap
- of data to crunch along with the (alpha-only) program code, and then wait
- until the crunched data come back. But this would require special software,
- probably for the Video people only.
-
- The only announced use of an alpha board is in the DraCo clone, however,
- I've heard nothing but announcements and "real soon"s. Moreover, those people
- never made clear how it would connect to the DraCo main processor softwarewise
- and which software should run on the alpha.
-