Thread View: comp.arch.bus.vmebus
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Started by nickgill
Thu, 24 Dec 1992 22:22
VME vs other bus architecture
Author: nickgill
Date: Thu, 24 Dec 1992 22:22
Date: Thu, 24 Dec 1992 22:22
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Hello, Can anyone give me a breakdown on the different buses? Specifically, the VME, STD, Cybermotion, MPL I understand that the: VME is for Motorola STD is for Intel Cybermotion is for Cybermotion robots MPL is for Motorola with emphasis on motion, moving, jarring, etc Thanks, Nick
Re: VME vs other bus architecture
Author: Michael Bodine
Date: Mon, 04 Jan 1993 19:47
Date: Mon, 04 Jan 1993 19:47
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nickgill@doc.bmd.trw.com writes: >Can anyone give me a breakdown on the different buses? >Specifically, the VME, STD, Cybermotion, MPL >I understand that the: >VME is for Motorola >STD is for Intel >Cybermotion is for Cybermotion robots >MPL is for Motorola with emphasis on motion, moving, jarring, etc First, you're asking an awful lot of someone to spend quite a bit of time writing a paper describing all the differences among the most popular buses. I used to give two hour presentations comparing several of the major architectures, and that was just an overview. Second, you've only mentioned two of those in common use, VME and STD. I've never heard of the other two. What about STE, Multibus, Multibus II, VXI, Futurebus+, NuBus? Not to mention the PC buses in use. The high end stuff. PLC buses. The list gets rather long! Third, VME is NOT for Motorola. You'll find 68K and 88K Motorola processors co-residing with Sparc, VAX-chips, ix86s, AMDs, MIPS, various math processors, DSPs, and semi-custom chips. And that's the short list. Similarly, STD has been around a long time, and just about everything in the low to mid performance ranges has been put on an STD board. I'd recommend a search thru the technical literature if you'd like to find articles comparing the various bus architectures. Maybe someone has one already in machine readable form! Decisions made about bus architecture, however, are mostly made on issues like availability, price, and maybe scalability and performace. Lots of other considerations come to play -- probably the biggest hurdle for most new projects is overcoming the inertia of what was used yesterday. I could spend a lot of time talking about advantages of one over the other, but i'm pretty obviously prejudiced, so i'll leave that part of the discussion to other, more disinterested parties. -- [ Michael Bodine, michael@chg.mcd.mot.com, Dial: (708) 576-7840, FAX: x8875 ] [ Motorola TSD; Loc IL38; 1100 Woodfield; Suite 334; Schaumburg, Il 60173 ]
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