MAMEDEV Forum

I noticed that there is a partial VT520 emulation in MAME at the moment. Does anyone know what the status is?

I am contemplating trying to more accurately emulate the VT220/VT3XX/VT4XX family. Having not studied the architecture(s) of each well enough yet, I'm not sure how much from the 520 can be leveraged against the others yet. Any thoughts?

VT520 is a "skeleton" - such drivers are not expected to function at all, and serve mostly to document the ROM dumps. VT220, VT320, VT420 are skeletal as well. Getting a driver out of skeletal state can be a lot of fun -- it helps if you've done that before, though. Getting the emulated device pass its POST is a major step -- usually you have to figure out the memory and I/O device map, and connect interrupt sources.

VT100 and VT240 is working, with minor graphics issues, you can start from there. Bitsavers have technical manuals for both.

Thanks for the info. Is this the pertinent place to discuss development, or is there another place for that?

Yes, https://forums.bannister.org/ and #mame-dev on freenode are more active.

(There's also http://www.mameworld.info/ubbthreads/po ... rogramming that's less active)