Not sure how general this issue is, but page up & page down in my terminal (OSX built-in "Terminal" application) produce the sequences ^[[5~ and ^[[6~ respectively. However, readchar.readkey produces two character sequences for these keypresses: ^[[5, ~ and ^[[6, ~. I expect them to produce just one sequence each.
What's surprising is DELETE has a similar escape code ^[[3~ which works properly.
Not sure how general this issue is, but page up & page down in my terminal (OSX built-in "Terminal" application) produce the sequences
^[[5~and^[[6~respectively. However,readchar.readkeyproduces two character sequences for these keypresses:^[[5,~and^[[6,~. I expect them to produce just one sequence each.What's surprising is DELETE has a similar escape code
^[[3~which works properly.