Draw a pixel: Difference between revisions

By the time the Commodore Plus/4 and C-16 were released, Commodore was ready to ship them with a version of BASIC, dubbed BASICversion 3.5, that included graphic support out of the box. The statements were again similar to but slightly different from what had come before in the SuperExpander cartridges. When the Commodore 128 was released, its version of BASIC, dubbed 7.0, included all of 3.5 essentially unchanged, along with many other improvements.

While the Commodore 128's BASIC 7.0 had impressive support for graphics on the 40-column display, it had no such support for bitmap graphics on the double-resolution 80-column display provided by its VDC chip. For that, we turn to BASIC 8, which was released as a separate software package that had to be loaded (or installed as a chip on the C128's motherboard). It was developed outside of Commodore and has a syntax very different from the standard BASIC's graphic commands, but it supports 3D graphics out of the box, including viewport clipping, scaling, etc. Note that the below program specifies a Z coordinate of 0 for the dot, which places it on the surface of the viewport.