Vectrex ROM versions..

[thomas]

Hello there,

I recently started programming on a Vectrex, for various reasons, and am at a point where I am wondering about
different ROM versions: the documentation i was able to get so far, mainly a pdf scan of the exec rom source, shows several
different versions out there, at least 3 for the printstr routine alone that I was looking into recently.
So..: how many rom versions are out there ? And are there romdumps anywhere to look further into
the differences ? All I could find online are references to problems for multicarts due to different rom versions
and different checksums calculated via testrev 4 for 'newer' vectrex versions on youtube..

Thomas

[Mayhem]

There's three different BIOS I believe (checksums B796, 7931 and 7ADB) with the latter being the one that has issues with some homebrew and flashcarts. You should be able to find dumps of them out there, don't have the time currently to go hunting them down for you.