| Assembly - Convert 16 bit integer to ascii help please [message #32940] |
Sat, 12 January 2013 10:56  |
JB
Messages: 42
Registered: January 2013
Karma:
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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.
I found one that almost does what I want, but it adds leading 0's.
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. :)
Here is that code:
;*
;* DECIMAL TO ASCII ROUTINE *
;* LOW-BYTE IN .X HI-BYTE IN .A
;* STORES ASCII STRING IN MEMORY
;* PRINTS PRECEDING 0'S
DECIMAL STX BINARY
STA BINARY+1
LDY #0
DEC1 LDX #"0"
DEC2 LDA BINARY
CMP DECTBL1,Y
LDA BINARY+1
SBC DECTBL2,Y
BCC DEC3
STA BINARY+1
LDA BINARY
SBC DECTBL1,Y
STA BINARY
INX
BNE DEC2
DEC3 TXA
STA DECCHR,Y
JSR $FFD2
INY
CPY #5
BNE DEC1
RTS
DECTBL1 .BYTE <10000,<1000,<100
.BYTE <10,<1
DECTBL2 .BYTE >10000,>1000,>100
.BYTE >10,>1
DECCHR .WORD 0,0
BINARY .WORD 0
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