Subject:
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Re: Spirit.OCX & Starting a Program
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 16 Nov 1998 14:16:05 GMT
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Original-From:
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Paul Haas <[paulh@hamjudo]Spamless[.com]>
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Viewed:
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5117 times
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On Mon, 16 Nov 1998, Dave Baum wrote:
>
> > Brett Carver wrote:
> > > Dave Baum wrote:
> > > > Since task 0 is the task activated by the "Run" button, you can run a
> > > > program by using StartTask(0). You can select which program to run
> > > > with the SelectProgram() command.
> > >
> > > Is it possible to do this from within a running program?
> > As far as I know, you can't set and start a different program from within
> > another program. Execution stops when you switch programs, so the
> > following start task instruction will never get reached.
Doesn't the mysterious opcode d2 allow you to do that? Or am I missing
something?
}}Date: Sun, 25 Oct 1998 15:35:08 -0800 (PST)
}}From: Kekoa Proudfoot <kekoa@Graphics.Stanford.EDU>
}}To: Lego Robotics <lego-robotics@crynwr.com>
}}Subject: Re: Ram map touch-ups and bytecode values
}}Speaking of extra opcodes. Opcode d2 is interesting - but I have no idea
}}what it's useful for. It takes a big endian short (call it "data") as
}}input and does the following:
}} if (data & 0x0008)
[ 20 important but unrelated lines of code removed. ]
}} set motor handler activate bit (bit 0x80 of cc01)
}}
}} if (data != last d2 data (cd1e))
}} last d2 data (cd1e) = data
}} switch (data)
[6 more unrelated lines of code removed]
}} case 0x0200:
}} stop all tasks, current program (ccc4) = 0, run program
}} case 0x0400:
}} stop all tasks, current program (ccc4) = 1, run program
}} case 0x0800:
}} stop all tasks, current program (ccc4) = 2, run program
}} case 0x1000:
}} stop all tasks, current program (ccc4) = 3, run program
}} case 0x2000:
}} stop all tasks, current program (ccc4) = 4, run program
}} case 0x4000:
}} stop all tasks
}} case 0x8000:
}} play two high pitch beeps
}}
}}WTF???? Why? The only thing I can think of is maybe this is used for
}}testing.
}}
}}-Kekoa
}}
--
paulh@hamjudo.com http://www.hamjudo.com
The April 97 WebSight magazine describes me as "(presumably) normal".
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Message has 1 Reply:
 | | Re: Spirit.OCX & Starting a Program
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| (...) It does seem to have the correct behavior for both setting and starting a program. My earlier description of the d2 opcode was a bit brief. Reviewing my notes, the "stop all tasks, set current program, run program" pseudocode is really: stop (...) (28 years ago, 16-Nov-98, to lugnet.robotics)
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