| Re: Assembly - Convert 16 bit integer to ascii help please [message #33068 is a reply to message #33008] |
Sun, 13 January 2013 10:26   |
JB
Messages: 42
Registered: January 2013
Karma:
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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:
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>> 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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