What graphic modes were there?
The CoCo 2 was capable of uppercase only on a 32×16 screen with 8 colors. To show lowercase, the CoCo 2 used inverse video. Later versions of the CoCo 2 showed real lower-case. In this “text” mode, there were also 64 x 32 “pixels” that could be set using the SET command, or drawn with CHR$. The CoCo 2 also had a maximum resolution of 256 x 192 with 2 colors. But by alternating light and dark lines, false or “artifact” colors could be made, mainly red and blue. Maximum colors in the CoCo 2 was 8 total. Here are all the possible graphic resolutions: 32x16x8, 64x32x8, 128x96x2, 128x96x4, 128x192x2, 128x192x4, and 256x192x2. Various software fixes were developed to improve the text screen. Telewriter 64 used the hi-res graphics screen, and drew each letter on the screen as the user typed. Machine-language made it very quick! Early on, RAINBOW (I think), featured a program called Screen51, which, once loaded and EXECed, would show all the text on the hi-res screen. The advantage was that yo
