On Wed, 6 Aug 1997 17:09:04 -0700 WF AUTOMA=?iso-8859-1?Q?=C7=C3O ?=
<wf@AMBIENTE.COM.BR> writes:

>You must to sucessive divisions by 10 and hold the remainder of each
>division
>in a temporary memory, until the quocient is 0.

If displaying to an LCD module based the HD44780, you can set the
controller to autodecrement (move the cursor right to left), then output
the remainders (as ASCII) directly to the LCD as they are calculated.
The digits of the number will appear on the screen in  correct order.

This makes the successive division method rather practical (certainly
RAM-efficient, though it may be necessary to store a copy of the number
since the division process will destroy it).  An N/8 bit division is easy
to expand to a large number of bits (one more shift instruction and 8
more loops for each byte).  If the input number is only 8 or 16 bits some
of the other methods discussed previously may be better.