I noticed Carlsson, that's how I found the Mospeed compiler but I did forget to thank you for that so thanks.
I've decided to go with the C64 for now, for the game I had in mind, which is a conversion of my Dodge City for the TI-99.
I'll be compiling with Mospeed and if there's a way to do it, I'd like to put a SID tune in there that'll play along in the background, but that's a way off yet!
( won't be my tune either , I'm in no way affluent musically or SIDically.)