In my attempts to put together a project that combines the parallel port patch and features useful for text-based applications (support for underline in mode mono; support for the second VGA font bank), I came across a commercial application called dbDOS, available at dbDOS.com. The full commercial project seems to consist of code based on h-a-l's Megabuild 6 with a GUI front end for installing dBASE into DOSBox and printing from it. The code changes that I described in another thread about dBASE printing are taken from the open-source part of dbDOS - I haven't seen the GUI front end.

The source code for the DOSBox part of dbDOS (not for the GUI front end) is available for download from dbDOS.com on their Updates page, but they posted a bad link for the latest version. The correct link is:

http://www.dbase.com/downloads/dbasellc-dbDOS … fcdb7651399.zip

I haven't checked to see whether any of the code is different from Megabuild 6, other than a few lines needed for dBASE printing. I was able to build the dbDOS code (after a lot of effort and teeth-gnashing), by removing things I don't need (networking, screen captures). But I'm not sure whether it adds anything to Megabuild other than a few lines for printing - and now h-a-l and ripsaw8080 have provided what seems to be a better fix in their posts here:

Re: Dosbox MB6 has printing problems on Linux.

Anyway, it would be good to know if there's anything else in dbDOS that isn't already in Megabuild 6. The programmer who worked on it only put his name in one of the printing-related files and I haven't done any other detailed comparisons.