Re: max IEC bus length and loading?

From: Groepaz <>
Date: Sun, 31 Oct 2010 20:47:16 +0100
Message-Id: <>
On Sonntag 31 Oktober 2010, you wrote:
> On Sun, 31 Oct 2010 11:57:27 -0700
> Nate Lawson <> wrote:
> > We have been doing some robustness testing of the ZoomFloppy board. It
> > uses a 7406 for driving the lines in order to be able to sink a decent
> > amount of current to support multiple IEC devices on the bus.
> > 
> >
> > 
> > What is the defined worst-case IEC bus configuration that we should
> > support? I'd like a reasonable limit we can support while not adding too
> > much delay for users of one or two drives.
> I'd say 6 devices is reasonable, but if the amount of delay doesn't
> increase all that quickly with the number of devices you're willing to
> deal with, go for something that no one in the real world is likely to
> ever actually exceed - perhaps 8 or so.

haha, i dont know but.... you and the other 2 people .....

personally i dont know anyone who - today - uses more than two drives (most 
infact are moving away from even that to 1541u or similar). and especially for 
a device like this, i think 4 would be more than enough. most probably wont 
even use more than one =P


The mystical trend of our time, which shows itself particularly in the rampant 
growth of the so-called Theosophy and Spiritualism, is for me no more than a 
symptom of weakness and confusion. 
<Albert Einstein>

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Received on 2010-10-31 20:00:26

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