Thread View: comp.arch.bus.vmebus
3 messages
3 total messages
Started by bukys
Thu, 17 Dec 1992 06:39
Looking for high-res timer board
Author: bukys
Date: Thu, 17 Dec 1992 06:39
Date: Thu, 17 Dec 1992 06:39
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1032 bytes
We're looking for a high-res VME timer board. It will be stuck in a multiprocessor and will get frequent memory-mapped reads from heavily instrumented code. Therefore, the ideal candidate would be something like: 32-bit counter, accessed D32. No state to maintain between accesses (so I don't have to make the multiple processors do mutual exclusion just to look at the timer). Alternatively, can anyone recommend a D32 VME prototype board onto which we could paste our own counter circuit? Liudvikas Bukys bukys@cs.rochester.edu
Re: Looking for high-res timer board
Author: mark milligan
Date: Fri, 18 Dec 1992 16:52
Date: Fri, 18 Dec 1992 16:52
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In article <9212171639.AA21526@stork.cs.rochester.edu>, bukys@cs.rochester.edu writes: > We're looking for a high-res VME timer board. > It will be stuck in a multiprocessor and will get frequent memory-mapped > reads from heavily instrumented code. Therefore, the ideal candidate > would be something like: > 32-bit counter, accessed D32. > No state to maintain between accesses (so I don't have to > make the multiple processors do mutual exclusion just to > look at the timer). > > Alternatively, can anyone recommend a D32 VME prototype board > onto which we could paste our own counter circuit? > > Liudvikas Bukys > bukys@cs.rochester.edu We are using the XYCOM-085 VME prototype board. I only allows 16 bit data accesses (A16/D16 and A24/D16) but is easy to use. Contact Xycom at 750 North Maple Road Saline, Michigan 448176 (313) 429-4971
Re: Looking for high-res timer board
Author: tanimori
Date: Sun, 27 Dec 1992 07:18
Date: Sun, 27 Dec 1992 07:18
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In article <1992Dec18.165248.11076@ee.ubc.ca>, markm@ee.ubc.ca (mark milligan) writes... >In article <9212171639.AA21526@stork.cs.rochester.edu>, bukys@cs.rochester.edu writes: >> We're looking for a high-res VME timer board. >> It will be stuck in a multiprocessor and will get frequent memory-mapped >> reads from heavily instrumented code. Therefore, the ideal candidate >> would be something like: >> 32-bit counter, accessed D32. >> No state to maintain between accesses (so I don't have to >> make the multiple processors do mutual exclusion just to >> look at the timer). >> >> Alternatively, can anyone recommend a D32 VME prototype board >> onto which we could paste our own counter circuit? >> >> Liudvikas Bukys >> bukys@cs.rochester.edu > >We are using the XYCOM-085 VME prototype board. I only allows 16 bit >data accesses (A16/D16 and A24/D16) but is easy to use. > >Contact Xycom at > >750 North Maple Road >Saline, Michigan 448176 >(313) 429-4971
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