When procedurally generating a map, how can I manipulate a tile's data to flip it as the picotron manual would suggest?

The following code seems to allow you to flip and place a map chip:

poke2({map address}, {flip flag} | {sprite number})

Specifically, it looks like this:

function _init()
  local sp_no = 1
  poke2(0x100000, sp_no)
  poke2(0x100002, 0x2000 | 0x4000 | sp_no)
  poke2(0x100004, 0x4000 | 0x8000 | sp_no)
  poke2(0x100006, 0x2000 | 0x8000 | sp_no)
end

function _draw()
  cls()
  map(0, 0)
end

You should now be able to display map tips that rotate in 90 degree increments.

Thank you!

You don't need to poke memory, you can use mget and mset, or if it's a userdata, :set and :get.

ohh i didn't know you could use mset like that!

function _init()
  local sp_no = 1

  mset(0,1, sp_no)
  mset(1,1, 0x2000 | 0x4000 | sp_no)
  mset(2,1, 0x4000 | 0x8000 | sp_no)
  mset(3,1, 0x2000 | 0x8000 | sp_no)

end

function _draw()
  cls(bg)
  map(0,0)
end