5 ms·

Yep! I remember doing this on the HP 48G's in the mid-90's: https://www.hpcalc.org/hp48/graphics/grayscale/ https://www.hpcalc.org/hp48/graphics/grayscale/

• mmastrac 4y ago
  I only ever got four colors to display reliably on my HP48, mostly through naive bank switching/mapping of GROB data.
• Grustaf 4y ago
  I remember those! PSA: there's a HP48G emulator for iphone, I use it almost every day...