Thread View: vmsnet.alpha
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Started by roger erickson
Tue, 12 Jan 1993 02:30
real-time
Author: roger erickson
Date: Tue, 12 Jan 1993 02:30
Date: Tue, 12 Jan 1993 02:30
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Will there ever be a simple, SMALL (note emphasis!!!), fast real-time OS that will run on Alpha machines? I mean something like Rt-11 (NOT Rsx) on the PDP or OS/9 on Motorola machines. I'd buy it in a minute.
Re: real-time
Author: George J. Carrette
Date: Tue, 12 Jan 1993 09:58
Date: Tue, 12 Jan 1993 09:58
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In article <1993Jan12.023034.126@alw.nih.gov>, rge@helix.nih.gov (roger erickson) writes: > Will there ever be a simple, SMALL (note emphasis!!!), fast real-time OS > that will run on Alpha machines? > I mean something like Rt-11 (NOT Rsx) on the PDP or OS/9 on > Motorola machines. > I'd buy it in a minute. Well, my ALPHA has 224 MB of RAM. And a tailored VMS system is plenty small enough to fit entirely in a ram disk on it. Seriously, if you need a realtime machine as fast as an ALPHA you are probably going to be doing a lot of numeric processing for which you do need a lot of RAM anyway. VMS can boot from the network and run without a disk. Device drivers are dynamically loadable. Any process can lock down memory in various ways. The scheduler is reliable. Sure, it is a lot more complex than Rt-11, (and if you don't like RSX ...). There are a few companies that sell and support portable realtime O/S's for Intel and Motorola microprocessors. Some have even done sparc ports, although the sparc is in the noise level for imbedded systems when compared to Intel and Motorola chips. If you really have good reason to use an ALPHA chipset I'm sure that one of these companies could support you with an O/S. -gjc
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