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Re: Assembly - Convert 16 bit integer to ascii help please [message #33008 is a reply to message #32940] Sat, 12 January 2013 21:14 Go to previous messageGo to previous message
rusure is currently offline  rusure
Messages: 1030
Registered: March 2012
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On Saturday, January 12, 2013 8:56:32 AM UTC-7, JB wrote:
> I am looking for a routine to convert a 16 bit integer into ascii (text)

>

>

>

> ex. convert $C000 (49152) to the characters "49152" stored in a memory address.

>

> Ideally I would like to have a routine that you can pass an option to either print leading 0's or strip them. But first things first I guess. :)


A C64 systems routine at $bdcd prints the decimal equivalent of a two byte integer. Here is how to use that code:

lda $#0d
jsr $ffd2

lda #$c0
ldx #$00
jsr $bdcd
rts

for the C128, substitute $8e32 at bank 15 for $bdcd. I've never had to do it but I'm sure that buried in the routine at $bdcd is a routine for converting 4 nibble hexidecimal to decimal text digits. I think the routines suppreses leading zeroes.
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