Whilst in a self-induced trance, Jeff Hellige happened to blather: This is one of the original flight simulators that came out for several 8 & 16-bit machines that IIRC the copyright was bought up by none other than Micro$hark. This is a GUI for OS-9... it was rather interesting [and I've heard useful with a hard drive], but *extremely* slow with floppies. Standard USCD P-code compiler... interesting thing is you could compile programs larger than 64K (max memory for a CoCo 1/2) out-of-box. IIRC, *almost* standard K&R C... methinks there were a few *very minor* differences that were easy to code around, but non-standard nonetheless. This can be fudged to use the 80x24 screen of the CoCo3 (quite nicely, I might add... as I used it quite often like this) but the line-editor was still weird. There are patches available to make this assembler support the Hitachi 6309 processor, which is a M6809 workalike -with enhancements.- Never played with any of these... others will have to take the ball and run here. Uhhh, I might have one *for trade*. Presently, I have two available working Disto MC-1 [Mini-Controller 1] boards, but without getting into that entire pirating issue *again*, I have no available DOS's for them. I am looking for a shareware RS-DOS clone that I could burn into e-prom for you, or I could purchase ADOS-3 or Extended ADOS-3 for you and install it. Be warned: I don't have cases for these controllers, so you'll have to run them nekkid or fudge something of your own. (The Tandy FD-500/501/502 case will work fine... but you can't buy them thru RS anymore, AFAIK.) I'll keep looking for a week or two for a DOS you can use, and let you know if you're interested. See ya, "Merch" -- Roger Merchberger | If at first you don't succeed, Programmer, NorthernWay | nuclear warhead disarmament should *not* zmerch(a)northernway.net | be your first career choice.