It scares me to think that I now days open, without blinking, some JPG that would eat up all the memory available in that poor Amiga.

But, ah...

  lea bbye,a0
  move.l (a0),$80
  trap #0
  rts

(to take it back on-topic)

Older Palm Treos (up to Treo 600 if I'm not mistaken) had everything in RAM and I remember upgrading to a newer, supposedly better Treo - and everything but the lag was...