Commodore had an extremely expensive, weird 15Hz flicker free and very high resolution monitor. If I recall correctly, i̶t̶ ̶d̶i̶v̶i̶d̶e̶d̶ ̶t̶h̶e̶ ̶s̶c̶r̶e̶e̶n̶ ̶i̶n̶ ̶4̶ ̶r̶e̶c̶t̶a̶n̶g̶l̶e̶s̶ ̶a̶n̶d̶ ̶p̶a̶i̶n̶t̶e̶d̶ ̶e̶a̶c̶h̶ ̶r̶e̶c̶t̶a̶n̶g̶l̶e̶ ̶a̶s̶ ̶a̶ ̶m̶i̶n̶i̶ ̶s̶c̶r̶e̶e̶n̶,̶ ̶o̶n̶e̶ ̶a̶f̶t̶e̶r̶ ̶a̶n̶o̶t̶h̶e̶r̶.̶ ̶T̶h̶a̶t̶ ̶w̶o̶u̶l̶d̶ ̶h̶a̶v̶e̶ ̶b̶e̶e̶n̶ ̶a̶ ̶l̶o̶t̶ ̶o̶f̶ ̶f̶l̶i̶c̶k̶e̶r̶i̶n̶g̶,̶ ̶e̶x̶c̶e̶p̶t̶ ̶t̶h̶a̶t̶ ̶t̶h̶e̶ ̶p̶h̶o̶s̶p̶h̶o̶r̶ ̶w̶a̶s̶ ̶v̶e̶r̶y̶ ̶l̶o̶n̶g̶ ̶g̶l̶o̶w̶i̶n̶g̶.̶ ̶ Edit: wrong, see comment below.