newRPL - Updated to build 1510 [official build remains at 1487]

[Claudio L.]

(03-28-2023 01:38 PM)goosnarrggh Wrote:  For example, the boot/sefltest mode in the 39g+ I have in front of me only has one menu option,

Code:

1. SELFTEST

.

I don't own any of those machines test it. I know they originally didn't provide firmware updates but if the hardware was the same you could in theory use the bootloader of a 39gs to replace the bootloader, via JTAG as you said.

Same with the 48gii, IIRC it was just limited in software so a hardware solution should enable you to do it. Probably not worth the effort, though, as you'd pay more for a JTAG adapter than for a 39gs that does allow firmware replacement.

EDIT: As a wild idea, a program coded in ARM assembly could be transferred to the 48gii via USB and executed that could take a hex string containing the boot loader and write it to flash. If you like to live dangerously of course.
EDIT 2: Nevermind, I just read that model had no USB either.