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Re: Assembly - Convert 16 bit integer to ascii help please [message #33068 is a reply to message #33008] Sun, 13 January 2013 10:26 Go to previous messageGo to previous message
JB is currently offline  JB
Messages: 42
Registered: January 2013
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Yeah I know about $BDCD but that will only print the number not store it in a memory location. I did break that routine down and can make it work, but basic rom has to be switched in for it to work. I'd like to have a solution that will run regardless if basic is in or out.


On Saturday, January 12, 2013 9:14:39 PM UTC-5, rusure wrote:
> 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)

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

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>> 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. :)

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

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> lda $#0d

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> jsr $ffd2

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> lda #$c0

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> ldx #$00

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> jsr $bdcd

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> rts

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> 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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