On Thu, Feb 23, 2023 at 5:37 PM Stephen Adolph [email protected] <http://mailto:[email protected]> wrote:
I'm back at this. > In the emulator I am working on. Ow, I have to redo the fonts. I'm free > to use whatever I want. > > So, which one of these fonts is actually used by the dvi? The 8x8 or the > 7x8? > I don’t have a DVI, but my understanding is that both are used, depending upon whether you set the display to 40- or 80-columns. The commands WIDTH 40 and WIDTH 80 switch between the two. Note that the DVI from Radio-Shack doesn’t allow PSET/PRESET to address individual pixels, so the width difference between the fonts probably wasn’t seen as a big deal. If I recall correctly, the NEC PC-8201A’s video interface — which does allow pixel addressing and colors — handles the problem by always specifying coordinates using a virtual high-resolution grid which is mapped onto whatever resolution is actually displayed. —b9
