newRPL - build 1255 released! [updated to 1299]

[Claudio L.]

(06-06-2019 11:28 AM)3298 Wrote:  Okay, so the offset means your 39gs probably had a different (newer?) version of the bootcode, but at least not a totally different one (kind of expected, to be honest). Of course I can't tell if the differences included something for the slightly different hardware configuration, but I think you could try just taking the 50g bootcode from x49gp and writing that onto the flash. I mean, what can go wrong that makes the situation worse than it is now?
Since the necessary part of the boot sector miraculously survived, you could even preserve the device's serial number (the last few bytes of the boot sector) by copying it over into the replacement boot sector. You'll recognize it, in x49gp it's the ASCII string "DEA0000001" for the 50g bootcode or "DE00000001" for the 49g+ one.

About writing to the flash, did you follow the normal flash-writing procedure consisting of a sequence of specific bytes written to specific offsets? If not, check out flash.c from the x49gp sources for details, specifically the function flash_put_halfword.

As far as flashing the ROM, using the bootloader from a 50g should work. The only difference is it may offer you to flash from SD card which is not populated on the board, just don't use that option. The second difference is the 39 expects a different string at 0x4000 (beginning of the ROM file) than the 50g. To flash a ROM using the 50g bootloader you'd have to hex edit the ROM file and change that string manually to match the 50g string, other than that it should work perfectly, the hardware is the same save for the RAM and ROM sizes.

Also, if anyone has a working 39 with an older version of newRPL, it's very easy to dump the ROM doing:

Code:


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Please do this and share here.