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Re: Efficient print of binary value

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From awanderin <awanderin@gmail.com>
Newsgroups comp.sys.apple2.programmer
Subject Re: Efficient print of binary value
Date Wed, 05 Sep 2018 23:53:48 -0600
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qkumba <peter.ferrie@gmail.com> writes:

> Not even close to half-length, but not branching:
>
>          LDA   #%10000000 
>          STA   MASK 
>
> LAB1     LDA   MASK
>          AND   VALUE
>          CMP   #1
>          LDA   #"0
>          ADC   #0
>          JSR   COUT 
>          LSR   MASK 
>          BNE   LAB1 


How about this?

           sec         ; force all 8 bits to print
lab1       rol  value
           beq  :done
           lda  #$58   ; high-ascii "0" right-shifted one bit
           rol         ; now it's "0" or "1"
           jsr  cout
           clc         ; now shift in zeros until done
           bcc  lab1
:done

-- 
--
Jerry    awanderin at gmail dot com

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Thread

Efficient print of binary value Jan Poulsen <jpo@tiggr.dk> - 2018-09-05 15:07 +0200
  Re: Efficient print of binary value Marco Verpelli <mverpelli@libero.it> - 2018-09-05 07:23 -0700
    Re: Efficient print of binary value Jan Poulsen <jpo@tiggr.dk> - 2018-09-05 17:05 +0200
      Re: Efficient print of binary value Michael J. Mahon <mjmahon@aol.com> - 2018-09-05 11:01 -0500
        Re: Efficient print of binary value qkumba <peter.ferrie@gmail.com> - 2018-09-05 11:13 -0700
          Re: Efficient print of binary value Michael J. Mahon <mjmahon@aol.com> - 2018-09-05 14:18 -0500
          Re: Efficient print of binary value Marco Verpelli <mverpelli@libero.it> - 2018-09-05 12:32 -0700
            Re: Efficient print of binary value Michael J. Mahon <mjmahon@aol.com> - 2018-09-05 22:21 -0500
          Re: Efficient print of binary value awanderin <awanderin@gmail.com> - 2018-09-05 23:53 -0600
            Re: Efficient print of binary value Jan Poulsen <jpo@tiggr.dk> - 2018-09-06 13:04 +0200
            Re: Efficient print of binary value Michael Barry <barrym95838@yahoo.com> - 2018-09-06 23:54 -0700
              Re: Efficient print of binary value awanderin <awanderin@gmail.com> - 2018-09-07 09:01 -0600

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