This is the toolchain + src + binaries for the modded ARC firmware for Jazz/Magnum.
I used wsl1 to build, but any linux system should work, make sure you have php installed.
build instructions, if any changes are made:
first build the libc:
cd Baselibc ; make ; cd ..
next build the ARC firmware
cd src ; make ; cd ..
if everything succeeded, ntprom.bin should have been built.
"boot0.bin" is the reset vector code from the original ntprom.bin.
You can use this ntprom.bin in MAME to boot NT 239, which somehow works despite emulating
the wrong graphics card (for now)...