Get the latest tech news
Character Bitmap Graphics on the Pet 2001
How to impress with bitmaps from nothing.
As readers of this blog may be aware of already, this is particularly impressive, because the graphics of the PET 2001 are strictly character-based, rendering hard-coded character shapes from ROM, and, most importantly, there is no bitmap plane, nor anything resembling sprites. While Genesis Project was probably not aware of this, there is prior art for this: 42 years earlier, in Cursor magazine #18, March 1980, Glen Fisher and Dave Dixon published their “Hi-Res” demo program for the PET 2001. This 10 th extra pair is (a) for burning cycles (which could be done in other ways, as well) and (b) for the benefit of the BASIC program and the syntax of its tiny graphics language (which provides a simple index into the grid by multiplying rows by 10), which will actually write to this 10 th load instruction.
Or read this on Hacker News