Gary, This is incredible and begs one big question for me. CIRCLE is a huge win, and you know what would make circles look amazing? The full-height screen of a Tandy 200. Are there any plans for an update to the 200 ROM?
As for the inner-workings of the CIRCLE command, on the Tandy Color Computer Extended BASIC, which added the CIRCLE command, it didn't actually draw a circle since calculating all of the sines and cosines would have taken way too many cycles. They preloaded an internal table with the geometry needed to make a (I think) 22-sided polygon and then just drew 22 connected lines. At the resolution of the CoCo, it was plenty circle-ish. How did you accomplish it? Thanks! --Justin On Fri, 2026-10-16 at 07:54 -0700, Joshua O'Keefe wrote: > > On Oct 15, 2026, at 11:45 PM, Gary Weber <[email protected]> wrote: > > > > TS-DOS 4.20 DOS-ON+ > > > > SARDOS 1.80 > > > > SARDOS 1.80 is also available for the Model 100 and with every one > > of the new DOS-ON keywords. > > > > ...and one more thing. > > > > CIRCLE. > > > > Two ROMs. Two machines. Folders at the Ok prompt. Circles on the > > screen. > > Holy cow! Wow! Wow wow! How long have you been cooking this up? It's > wonderful. > > Impressive to say the least. I think I can speak for the entire > community and our descendants when I say: thank you. > > One question, though: how'd you pull it off? >
