Re: max IEC bus length and loading?

From: Nate Lawson <>
Date: Sun, 31 Oct 2010 21:34:52 -0700
Message-ID: <>
On 10/31/2010 2:41 PM, Spiro Trikaliotis wrote:
> * On Sun, Oct 31, 2010 at 02:31:39PM -0700 Nate Lawson wrote:
>> First of all, the s2 and nibbler protocols in OpenCBM both use the ATN
>> line. So those only will never work with more than one drive on the bus.
>> The s2 protocol is the default warp mode in OpenCBM.
> This is not completely right: The serial2 ("s2") protocol is default in
> OpenCBM if and only if only one device is recognized. If cbmcopy and/or
> d64copy recognize more than one device, they fall back to serial1 ("s1")
> automatically.
> Again, this is only the default. If the user specifies a protocol on the
> command-line, no autodetection is done, and the command will use the
> specified protocol. 

Sorry, I see how that could be read wrong. What I meant was that two
things that are very useful (fast serial and parallel nibbling) will not
work with more than one drive present. Nothing we can do in hardware
improves that.


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Received on 2010-11-01 05:00:05

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