Groups > comp.sys.apple2.programmer > #1980

Re: RWTS return codes

Newsgroups	comp.sys.apple2.programmer
Date	2015-11-26 08:08 -0800
References	<ea18cb22-dd31-4ef1-a592-751221e7a5e9@googlegroups.com> <c37c6bf6-6a89-45cd-bf78-6fbc59c38b3f@googlegroups.com>
Message-ID	<84956491-76a5-48db-b358-bd08ea5f263c@googlegroups.com> (permalink)
Subject	Re: RWTS return codes
From	Mark Lemmert <mark.lemmert@gmail.com>

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On Tuesday, November 24, 2015 at 4:41:40 PM UTC-6, qkumba wrote:
> Error codes are not meaningful if the carry is clear on return.
> Specifically, it's the value of the last byte that was decoded during read, the value of the first nibble fetched after the last one written during write, and 00 if the command was seek, at least.

Thank you for the advice!

I modified my error routine to only treat RWTS return codes as an error if the carry flag is set and so far everything works great.

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Thread

RWTS return codes Mark Lemmert <mark.lemmert@gmail.com> - 2015-11-24 09:59 -0800
  Re: RWTS return codes qkumba <peter.ferrie@gmail.com> - 2015-11-24 14:41 -0800
    Re: RWTS return codes Mark Lemmert <mark.lemmert@gmail.com> - 2015-11-26 08:08 -0800
  Re: RWTS return codes gids.rs@sasktel.net - 2015-11-26 07:36 -0800
    Re: RWTS return codes Mark Lemmert <mark.lemmert@gmail.com> - 2015-11-26 08:15 -0800
      Re: RWTS return codes qkumba <peter.ferrie@gmail.com> - 2015-11-26 08:53 -0800
      Re: RWTS return codes gids.rs@sasktel.net - 2015-11-26 11:17 -0800
        Re: RWTS return codes Antoine Vignau <antoine.vignau@laposte.net> - 2015-11-26 12:50 -0800
          Re: RWTS return codes Mark Lemmert <mark.lemmert@gmail.com> - 2015-11-29 07:34 -0800
            Re: RWTS return codes qkumba <peter.ferrie@gmail.com> - 2015-11-29 08:37 -0800
              Re: RWTS return codes qkumba <peter.ferrie@gmail.com> - 2015-11-29 08:41 -0800
              Re: RWTS return codes Mark Lemmert <mark.lemmert@gmail.com> - 2015-12-02 14:15 -0800
        Re: RWTS return codes Mark Lemmert <mark.lemmert@gmail.com> - 2015-11-29 07:20 -0800

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