Subject:
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Re: bootstrap mode in assembling the HB
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Wed, 9 Sep 1998 16:05:35 GMT
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Original-From:
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Fred G. Martin <fredm@media+NoSpam+.mit.edu>
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Viewed:
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3988 times
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yes, RP4 is four isolated resistors, and this being part of the serial
line circuit, definitely explains your problem if you are using the
common-terminal style.
you can just install four 1K resistors if you don't have the correct
r-pack handy.
fred
In your message you said:
> hi
> At present I am up to section 4.4, "serial line and stop switch".
>
> I have installed all the components as per the section but when testing by a • pplying power
> and holding down the stop switch, the HB will not go into bootstrap mode. I h • ave not
> connected the interface board yet.
>
> Every thing else has tested ok up to this section, including getting 2MHz clo • ck measured
> via an O/scope.
>
> On closer inspection of the electronic catalogs, I notice there are a number • of
> configurations avaliable for resistor packs, ie RP4.
>
> The two main rpacks seem to be all resistors commoned on one leg and brought • out on a pin,
> or separate resistors moulded inside a rpack.
>
> I have installed the commoned pin type.
>
> Looking at the circuit diagram it appears the separate resistors is the confi • guration I
> require. Is this correct?
>
> thanks in advance
> steve t
> adelaide
> south australia
>
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Message is in Reply To:
 | | bootstrap mode in assembling the HB
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| hi At present I am up to section 4.4, "serial line and stop switch". I have installed all the components as per the section but when testing by applying power and holding down the stop switch, the HB will not go into bootstrap mode. I have not (...) (28 years ago, 9-Sep-98, to lugnet.robotics.handyboard)
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