I guess I should hook up the ISP and check the fuse settings. If the flash memory isn't locked out, I can probably use the ISP to read the existing flash contents so I'll be able to put that back.

Of course it will still take forever to figure out which of the two ways the ISP connector is supposed to fit on the printrboard pins :-).

Update: I did indeed manage to read the flash (and eeprom) contents with the AVRISP mkII. I even ran a "strings" command on the result and found all sorts of strings that said Marlin and Solidoodle and wot-not, so it does appear to be the real flash contents and not some random garbage. I guess the flash isn't locked out. (And, miraculously, the cable connector fits the convenient way - no need to fold it back on itself :-).

Perhaps I'll actually try loading new firmware now that I seem to have a backup.

Is there a site somewhere that hosts the original, precompiled solidoodle firmware .hex files (for various model solidoodles and motherboards)?

I'd love to use it to verify that I can successfully upload firmware to the printrboard on my solidoodle 2.

I'd rather not combine that with also testing that I can compile the firmware (I'd like that to be a separate step :-).

I've never been able to upload the firmware using the Arduino software.  Adrian provided me with a n app he wrote a while ago, that did the job perfectly.  He was planning on making it available here, but I don't know what happened.

Anyway, I now use the latest Arduino software to compile the firmware, but I don't upload it using that, I use Adrian's app to upload.

Here is the Arduino software I use.
http://download1897.mediafire.com/4fasn … indows.zip

Once downloaded, extract it anywhere where you have at least 300MB free.  Run the Arduino app, and load the Solidoodle sketch (File/Examples/SolidoodleMarlin).  If you have a SD2, you can simply click the "Verify" button to compile the firmware.  It will create the HEX file in the working temp directory.

I for one was reluctant to make any changes to my SD3's firmware, but I had to do it eventually due to the hardware changes I made, and now I find it quite easy to do.

I don't know if Adrian is OK with me posting the uploder app, but with that, you should be set.  I will send him a PM to check.

In the meantime, maybe we can all use this thread as a repository of various firmwares.

Here is my current one:

Standard SD3 setup for Sanguinlolu board with the following modifications:

QU-BD heater
Thermistor was changed to type 80, and the QU-BD PID values were enabled.
12V, 40W Heater cartridge
PID_MAX Changed to 170 from 256.  This reduces the maximum current sent to the heater, and prevents it from triggering MAXTEMP during autotune.  Added default PID values for heater cartridge

I'd love to use it to verify that I can successfully upload firmware to the printrboard on my solidoodle 2.

I'd rather not combine that with also testing that I can compile the firmware (I'd like that to be a separate step :-).