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In article <dbaum-8E73D6.20462201042000@lugnet.com>, Dave Baum
<dbaum@spambgoneenteract.com> wrote:
> In article <38E68D9E.71063F04@akasa.bc.ca>, Dean Husby
> <nntp@akasa.bc.ca> wrote:
>
> > I've tried using the Download firmware option of NQC for downloading the
> > new firmware.
> >
> > Unfortunately it downloads to about 2489 and then errors out.
>
>
I found the problem...
When verifying the checksum, the ROM scans [8000, cc00). Since it zeros
out this area initially, this would indeed reflect the checksum of the
firmware, provided it is less than 4400 bytes long (in hex).
NQC sums the entire firmware file, thus the reason checksum was failing
for firm0321.lgo.
I probably won't release a new version of NQC until I have alpha level
support for RCX 2.0 in general, but I don't want to leave people stuck,
either. In the meantime...
1) If you use Windows, just stick with Lego's firmware downloader for
now.
2) If you use Linux, consider building from the sources and making the
following change:
File: rcx/RCX_Link.cpp
Method: RCX_Result RCX_Link::_SendFirmware(const UByte *data, int
length, int start, bool progress)
Change line
for(int i=0; i<length; i++)
To
for(int i=0; i<length && i<0x4c00; i++)
^^^^^^^^^^^
I suggest using the 2.1 r1 sources since the r2 sources don't do fast
firmware very well. r2 sources will still download ok...just not in
fast mode.
3) If you use a Mac (and can't use VPC for option 1), let me know. I
could make an alpha release of either MPW NQC or MacNQC...but I'd prefer
not to release both at this point.
Dave Baum
--
reply to: dbaum at enteract dot com
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Message is in Reply To:
 | | Re: NQC and RIS2.0 Firmware
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| (...) I've been looking at that for most of today. The 2489 is basically the last packet to go to the RCX, and the error is a "checksum error" coming back from the RCX. As far as I can tell, nqc breaks with any firmware file bigger than 20K (...) (25 years ago, 2-Apr-00, to lugnet.robotics.rcx.nqc)
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