CAD CAM EDM DRO - Yahoo Group Archive

Re: Whither goest DOS?

Posted by ccstratton
on 2002-01-23 11:50:52 UTC
> Frankly, I will be dancing in the clouds when MS finally stops
supporting that
> library-cum-virus-cum-"operating environment" that passes for
an "operating
> system", i.e. Windows 2, 3, 3.1, WFW 3.11, Win95, Win95 OSR2,
Win98, and Win ME.
> It is unfortunate that some form of DOS does not remain available
as a remnant.
> I think most of us here would be happy if we could buy a DOS
license on a
> completely-unsupported basis...

Kevin,

I understand your frustration with windows, but I think your goals
are somewhat in conflict. On the one hand you want a well written
operating system that enforces rules to keep poorly written
applications from stepping on eachother's turf. On the other,
you want 'real' dos with 'real' basically meaning freedom
to step on priveleged system turf such as IO ports or the system
timer.

The conflict can of course be worked out in at least two ways:

1) Run 'real' dos on dedicated machines that do nothing but cnc
control. I'm not sure if you were complaining that you could no
longer buy it for this purpose.

or

2) Implement ways to grant privileges only to selected applications so
that they can do things like mess with the timer or directly write
to IO ports.

The linux/EMC system uses option (2) - the realtime scheduler runs
above the operating system with no rules. Tasks running under the
linux kernel with root permissions can setup realtime tasks above the
kernel, which are easily capable of crashing the system. To gain
IO port access from a normal linux task you need to have root
permission and specifically request access to that port. Presumably
such a request could be refused or at least logged if one were
attempting to debug an unstable system. Meanwhile ordinary tasks
running with user permissions are limited in the amount of damage
they can do, much as theoretically takes place under NT.

It may be that NT and its dervitatives, when working properly,
provide the necessary hooks to get at the hardware features needed to
write a high performance, reliable motion system if one takes the
time (and perhaps signs enough NDA's) to learn how. I know one
ancestor of EMC used such a base system. But the open source nature
of linux has substantial advantages whenver one desires to do things
not anticipated by the operating system vendor.

Chris Stratton

Discussion Thread

ballendo 2002-01-23 04:42:43 UTC Whither goest DOS? Tony Jeffree 2002-01-23 06:31:07 UTC Re: [CAD_CAM_EDM_DRO] Whither goest DOS? Marcus & Eva 2002-01-23 08:21:41 UTC Re: [CAD_CAM_EDM_DRO] Whither goest DOS? studleylee 2002-01-23 08:27:58 UTC Re: Whither goest DOS? Randy Gordon-Gilmore 2002-01-23 08:45:28 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? David Goodfellow 2002-01-23 08:48:19 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? Carol & Jerry Jankura 2002-01-23 09:19:20 UTC Whither goest DOS? pfrederick1 2002-01-23 09:50:41 UTC Re: Whither goest DOS? Fitch R. Williams 2002-01-23 10:22:41 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? CL 2002-01-23 10:38:32 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? CL 2002-01-23 10:47:29 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? dlantz@a... 2002-01-23 10:51:14 UTC RE: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? Jon Elson 2002-01-23 10:58:07 UTC Re: [CAD_CAM_EDM_DRO] Whither goest DOS? Carol & Jerry Jankura 2002-01-23 11:02:45 UTC RE: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? Jon Elson 2002-01-23 11:14:20 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? Drew Rogge 2002-01-23 11:17:00 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? Kevin P. Martin 2002-01-23 11:21:51 UTC RE: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? ccstratton 2002-01-23 11:50:52 UTC Re: Whither goest DOS? Tim 2002-01-23 14:19:22 UTC RE: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? ccs@m... 2002-01-23 14:31:16 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? Hugh Currin 2002-01-23 14:37:02 UTC Re: Whither goest DOS? Smoke 2002-01-23 15:28:08 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? Ray 2002-01-23 15:38:38 UTC Re: Re: Re: Whither goest DOS? Randy Gordon-Gilmore 2002-01-23 15:41:07 UTC DOS is dead; long live DOS :-) Chris L 2002-01-23 15:42:06 UTC Re: [CAD_CAM_EDM_DRO] Re: Re: Re: Whither goest DOS? Russell Shaw 2002-01-23 16:03:25 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? wanliker@a... 2002-01-23 17:21:13 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? Bill Vance 2002-01-23 17:59:53 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? pfrederick1 2002-01-23 18:10:01 UTC Re: Whither goest DOS? Russell Shaw 2002-01-23 18:30:49 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? Mr. sausage 2002-01-23 20:16:28 UTC RE: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? waynegramlich 2002-01-23 20:53:03 UTC Open source CNC buffer [Was: Whither goest DOS?] ballendo 2002-01-23 20:56:09 UTC Re: Whither goest DOS? Chris L 2002-01-23 21:22:04 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? ballendo 2002-01-23 21:35:17 UTC Re: Whither goest DOS? Bill Vance 2002-01-23 21:40:43 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? Carol & Jerry Jankura 2002-01-23 21:48:13 UTC RE: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? ccs@m... 2002-01-23 22:00:11 UTC Re: USB or Ethernet machine control Jon Elson 2002-01-23 22:11:30 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? ballendo 2002-01-23 22:36:41 UTC Re: Whither goest DOS? ballendo 2002-01-23 23:02:09 UTC Re: Re: Whither goest DOS? ballendo 2002-01-23 23:06:15 UTC microcontrollers for cnc was Re: Whither goest DOS? ballendo 2002-01-23 23:18:21 UTC Re: Whither goest DOS? ballendo 2002-01-24 00:50:52 UTC Re: USB or Ethernet machine control Ian Wright 2002-01-24 02:18:35 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? pfrederick1 2002-01-24 05:02:06 UTC Re: Whither goest DOS? dlantz@a... 2002-01-24 05:22:28 UTC RE: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? pfrederick1 2002-01-24 05:25:09 UTC Re: Whither goest DOS? Carol & Jerry Jankura 2002-01-24 05:54:58 UTC RE: [CAD_CAM_EDM_DRO] Re: USB or Ethernet machine control pfrederick1 2002-01-24 08:11:09 UTC Re: Whither goest DOS? JanRwl@A... 2002-01-24 10:22:41 UTC Re: [CAD_CAM_EDM_DRO] Re: USB or Ethernet machine control Jon Elson 2002-01-24 10:54:27 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? CL 2002-01-24 11:02:25 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? ccs@m... 2002-01-24 11:10:34 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? CL 2002-01-24 12:11:09 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? ccs@m... 2002-01-24 12:24:01 UTC Re: glitchy step signals wanliker@a... 2002-01-24 12:44:21 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? Luc Vercruysse 2002-01-24 13:57:00 UTC Re: [CAD_CAM_EDM_DRO] Open source CNC buffer [Was: Whither goest DOS?] Russell Shaw 2002-01-24 14:48:07 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? Carol & Jerry Jankura 2002-01-24 19:05:21 UTC RE: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? ballendo 2002-01-25 00:38:01 UTC Re: Whither goest DOS? ballendo 2002-01-25 00:47:16 UTC Subject headings vs. OT was Re: Whither goest DOS? ballendo 2002-01-25 02:07:05 UTC Linux cnc OTHER than EMC was Re: Whither goest DOS? Ian Wright 2002-01-25 02:41:16 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? ballendo 2002-01-25 05:55:18 UTC Re: Whither goest DOS? Dennis Dunn 2002-01-25 06:31:26 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? Russell Shaw 2002-01-25 06:39:34 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? ballendo 2002-01-25 07:04:06 UTC fpga's for b-box was Re: Whither goest DOS? ballendo 2002-01-25 07:10:06 UTC Re: Whither goest DOS? Dennis Dunn 2002-01-25 07:37:33 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? CL 2002-01-25 11:18:26 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? ballendo 2002-01-25 12:29:51 UTC windows controllers master5 was Re: Whither goest DOS? ballendo 2002-01-25 12:43:33 UTC Re: Whither goest DOS? dkowalcz2000 2002-01-25 13:09:00 UTC Re: USB or Ethernet machine control ballendo 2002-01-25 13:21:02 UTC Black boxes was Re: USB or Ethernet machine control j.guenther 2002-01-25 13:45:47 UTC RE: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? Paul 2002-01-25 17:24:31 UTC Re: [CAD_CAM_EDM_DRO] Black boxes Russell Shaw 2002-01-25 17:38:28 UTC Re: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? Jon Elson 2002-01-25 22:24:06 UTC Re: [CAD_CAM_EDM_DRO] Black boxes was Re: USB or Ethernet machine control Jon Elson 2002-01-25 22:42:11 UTC Re: [CAD_CAM_EDM_DRO] Black boxes ballendo 2002-01-27 04:50:03 UTC "gutting" black boxes was Re: Whither goest DOS? ballendo 2002-01-27 05:20:55 UTC All those in favor of simple interfaces, say "I" was Re: Whither goest DOS? ballendo 2002-01-27 06:41:41 UTC Re: Black boxes ballendo 2002-01-27 18:33:01 UTC master 5 group for computer info was Re: Whither goest DOS? Chris L 2002-01-27 18:48:57 UTC Re: [CAD_CAM_EDM_DRO] master 5 group for computer info was Re: Whither goest DOS? Raymond Heckert 2002-01-27 21:09:36 UTC Re: [CAD_CAM_EDM_DRO] Re: Black boxes Tony Jeffree 2002-01-27 22:15:52 UTC Re: Patent searches (was Black boxes) Scot Rogers 2002-01-27 22:58:49 UTC RE: [CAD_CAM_EDM_DRO] Re: Whither goest DOS? ballendo 2002-01-28 05:09:36 UTC Us Govt. patent site was Re: Black boxes Tony Jeffree 2002-01-28 05:24:30 UTC Re: [CAD_CAM_EDM_DRO] Us Govt. patent site was Re: Black boxes ballendo 2002-01-28 05:50:11 UTC Us Govt. patent site was Re: Black boxes Tony Jeffree 2002-01-28 07:03:07 UTC Re: [CAD_CAM_EDM_DRO] Us Govt. patent site was Re: Black boxes ron ginger 2002-01-28 18:39:05 UTC Black boxes wanliker@a... 2002-01-28 18:48:09 UTC Re: [CAD_CAM_EDM_DRO] Black boxes ballendo 2002-01-29 02:19:50 UTC Re: Black boxes Fitch R. Williams 2002-01-29 04:40:14 UTC Re: [CAD_CAM_EDM_DRO] Black boxes