> and you know what would make circles look amazing? The full-height screen of a Tandy 200.
I really like this idea. I already have the baseline of SARDOS 1.60 for the T200, and integrating all of the BASIC commands, directory navigation + CIRCLE(), won't take much. Gary On Fri, Oct 16, 2026 at 9:45 AM Justin Poirier <[email protected]> wrote: > 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? > > >
