Subject:
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RE: How do I delete firmware from firmware?
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Newsgroups:
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lugnet.robotics.rcx
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Date:
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Thu, 18 May 2000 02:09:03 GMT
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Viewed:
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1535 times
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> I asked this question under a confusing subject that
> people may have missed so I am asking again. How does
> one delete firmware from firmware. I am looking for a
> solution for pbforth but the question could have be asked
> for LegOS or Quite C as well. If I get no answer I will
> try gross things like zeroing the first 50 bytes of code,
> turn off sll interrupts and then jumping to the h8-300 reset
> vector. Some variation of this will probably work but I
> wondered if there was an "official" way to do this. I notice
> from the unofficial internals doc that there is an opcode
> for this but no rom entry is listed for this function. Has
> anyone looked at the rom to see what it does?
I think if you do a direct jump to 0x03ae, it will init memory
and essentially start the brick from scratch. At least that's
what I read from the internals doc...
Cheers,
Ralph Hempel - P.Eng
--------------------------------------------------------
Check out pbFORTH for LEGO Mindstorms at:
<http://www.hempeldesigngroup.com/lego/pbFORTH>
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Reply to: rhempel at bmts dot com
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0x03AE
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Message has 2 Replies:
 | | Re: How do I delete firmware from firmware?
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| (...) This sounds correct. In C, this is how I do it: /* Delete the firmware */ *(char *)0xffcc = 1; (*(void (**)(void))0)(); Indeed, *(void (**)(void))0) is the reset vector, whose value is 0x03ae. 0xffcc is timer 0. I forget what effect setting it (...) (25 years ago, 18-May-00, to lugnet.robotics.rcx)
| | | Re: How do I delete firmware from firmware?
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| (...) Looking at forth code it looks like "HEX 3ae EXECUTE" might end up doing what we are talking about. I tried this with out getting what I expected. I will fiddle more but does the approach seems right? M_CODE(7,``"EXECUTE"...TE,_FLINK) MOV.W (...) (25 years ago, 23-May-00, to lugnet.robotics.rcx.pbforth)
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Message is in Reply To:
| | How do I delete firmware from firmware?
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| I asked this question under a confusing subject that people may have missed so I am asking again. How does one delete firmware from firmware. I am looking for a solution for pbforth but the question could have be asked for LegOS or Quite C as well. (...) (25 years ago, 17-May-00, to lugnet.robotics.rcx)
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