In a message dated 97-03-16 21:45:29 EST, you write: << In fact, if I'm not mistaken, all machine language development for the TI 99/4(a) had to be done on one of TI's big expensive machines for the first (couple?) years. (ie, assembler was not available on the TI 99/4A.) At one time, I found an excellent history of TI's computer attempts on the web, but I can't seem to find it now. You may be referring to the "TI Home Computer Guideline", by Bill Gaskill. It's on the web in several TI sites (i.e., Polivka, & others)... TI did write literally all of the code of a "big expensive machine" for its 99/4 and /4A programs, except one and only - the Hopper game. Hopper was TI's first and only entertainment game written on the TI for the TI. Bryan