I guess you mean where each bit will end up when you display the character?
For the 5x8 mode which I use the first byte is the top row, the 0'th bit
the flast collumn etc.
In my home-brew HLL I use

   HD44780_define(
      0,
      0b_00100,
      0b_01110,
      0b_11111,
      0b_00100,
      0b_00100,
      0b_00100,
      0b_00100,
      0b_00100
   )

to define character 0 as an up-arrow.

Wouter.

----------
> From: Brian Striggow <striggb@BAE.UGA.EDU>
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: Hitachi LCD custom characters
> Date: Monday, November 30, 1998 03:28
>
>         I have numerous sources of data which specify the command to send
> to a Hitachi driven LCD display for defining custom characters.  However,
> none actually specify how to map out the character.
>
>         Has anybody done this or seen a source for the info??
>
> tnx
> bcs