I'm not sure what the vt100 resolution was, but later terminals allowed you to download your own bitmaps. According to (http://www.vt100.net/docs/vt510-rm/DECD

I'm not sure what the vt100 resolution was, but later terminals allowed you to download your own bitmaps. According to (http://www.vt100.net/docs/vt510-rm/DECDLD.html http://www.vt100.net/docs/vt510-rm/DECDLD.html), these bitmaps were: "10 pixels wide for 80 columns, 6 pixels wide for 132 columns." If their baseline was 800 pixels (80 cols * 10 pix/col) then 132 is the largest number of columns fitting into 800 pixels at 6 pix/col.